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VERSION:2.0
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BEGIN:VEVENT
SUMMARY:Higher Order QCD Calculations with NNLOJET
DTSTART;VALUE=DATE-TIME:20181220T110000Z
DTEND;VALUE=DATE-TIME:20181220T112000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4298@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Duncan Walker (IPPP\, Durham University)\n\nI will p
resent some recent results of higher order QCD calculations in vector boso
n processes at colliders using the Monte Carlo framework NNLOJET. Recent d
evelopments are opening up a new world of precision phenomenology for stud
y\, improving our understanding of QCD/EW interactions at a fundamental le
vel.\n\nhttps://conference.ippp.dur.ac.uk/event/748/contributions/4298/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4298/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bifurcations in the RG-Flow of QCD
DTSTART;VALUE=DATE-TIME:20181219T164500Z
DTEND;VALUE=DATE-TIME:20181219T170500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4306@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Folkert Kuipers\n\nIn this talk\, I’ll discuss the
connection between the theory of dynamical systems and renormalization gr
oup flows in quantum field theory. In particular\, I’ll apply numerical
methods from bifurcation analysis to study the RG-flow of an effective mod
el for QCD with a four-fermi interaction and an arbitrary number of colors
and massless flavors. Using bifurcation analysis techniques\, new fixed p
oints are found in and close to the conformal window. Particular focus wil
l be given to the way in which the fixed points (dis)appear in the model\,
and how this affects the scaling dimensions of the (ir)relevant operators
. Furthermore\, I’ll discuss how the fixed point structure of the RG-flo
w changes when a scalar field coupling through a Yukawa interaction is add
ed to the model.\n\nhttps://conference.ippp.dur.ac.uk/event/748/contributi
ons/4306/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4306/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Non-perturbative aspects of Sp(2N) gauge theories.
DTSTART;VALUE=DATE-TIME:20181220T115000Z
DTEND;VALUE=DATE-TIME:20181220T121000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4300@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Jack Holligan (Swansea University)\n\nThe discovery
in 2012 of the Higgs boson provided evidence for our understanding of the
origin of mass. However there still remain some unanswered questions one o
f which is the "Naturalness Problem".\n\nLike the other fundamental partic
les\, the Higgs acquires loop corrections to its mass due to its interacti
on with the quarks\, the leptons and itself. If we impose an ultraviolet c
utoff\, $\\Lambda_{\\text{UV}}$\, on the Standard Model\, these correction
s depend quadratically on $\\Lambda_{\\text{UV}}$. If $\\Lambda_{\\text{UV
}}$ is sent to infinity\, a very large counter term is required to cancel
out the quadratic divergence arising from the loop corrections. In order t
o produce the small observed Higgs mass of $125$ GeV\, the counter term mu
st be computed to a precision so high that it is not only unnatural - henc
e the name - but far beyond experimental reach.\n\nOne way to resolve this
problem is to treat the Higgs not as a fundamental particle but as a cons
tituent one (like the proton or neutron). The need for fine-tuning is simp
ly an effect of the approximation of the Higgs as a fundamental particle b
reaking down.\n\nThe compositeness deals with the issue of fine tuning and
the subsequent low mass is achieved by corollary of Goldstone's Theorem.
When a symmetry is explicitly broken (e.g. by a mass term) there exists a
light boson for each broken generator (as opposed to a massless boson in t
he case of spontaneous symmetry breaking). The explicit breaking of a new
symmetry group could give rise to what is observed as the Higgs boson.\n\n
The combination of Goldstone's Theorem and a new symmetry group have poten
tial to explain the low-mass Higgs as a composite particle without the nee
d for fine-tuning. Candidate symmetries are the Symplectic Groups (denoted
as Sp($2N$)). Observable quantities of such a Quantum Field can be comput
ed on the lattice and their experimental detection would provide evidence
for same.\n\nhttps://conference.ippp.dur.ac.uk/event/748/contributions/430
0/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4300/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Isospin breaking corrections to leptonic decay rates on the lattic
e
DTSTART;VALUE=DATE-TIME:20181220T121500Z
DTEND;VALUE=DATE-TIME:20181220T123500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4301@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: James Richings (stfc southampton phd student and for
mer durham undergraduate student)\n\nLattice QFT is a method for calculati
ng non-perturbative physics and has been used extensively to calculate pro
perties of low energy QCD. Over the last decade calculation's of a number
of non-perturbative QCD quantities have reached a good precision\, with ag
reement from across the lattice community.\nIn general isospin breaking (I
B) effects have not been included in these calculations because until now
IB effects have not been a limiting source of systematic error. Isospin br
eaking effects enter in two ways\, the difference in the mass of the up an
d down quark (strong IB) and the difference in the QED charge of up and do
wn type quarks (QED IB). Considering power counting these effects are expe
cted to be of the order 1% of the decay rate. Due to the introduction of Q
ED effects\, we must calculate the full QCD + QED path integral on the lat
tice and this introduces a number of complications. \nIn this presentation
\, I will introduce Lattice QCD+QED as a calculation method for flavour ph
ysics observables and discuss how leptonic decay rates are calculated on t
he lattice with the inclusion of isospin breaking effects.\n\nhttps://conf
erence.ippp.dur.ac.uk/event/748/contributions/4301/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4301/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Applications of gauge/gravity duality
DTSTART;VALUE=DATE-TIME:20181219T144000Z
DTEND;VALUE=DATE-TIME:20181219T150000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4302@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Matthew Russell (Southampton)\n\nThis talk will disc
uss scenarios where the gauge/gravity duality can be applied to non-pertur
bative regimes in physics. The standard model explains many phenomena seen
in nature but relies on techniques that only work in small coupling. The
gauge/gravity duality is a way in which we can try to obtain theoretical p
redictions for areas such as strongly coupled condensed matter and the low
energy regime of QCD. Specifically this talk will focus on momentum dissi
pation effects on zero sound in strange metals and the benefit of explorin
g holographic imaginary chemical potential in the QCD phase diagram.\n\nht
tps://conference.ippp.dur.ac.uk/event/748/contributions/4302/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4302/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Central charge of self-dual strings from holography
DTSTART;VALUE=DATE-TIME:20181219T153000Z
DTEND;VALUE=DATE-TIME:20181219T155000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4304@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Darya Krym (New York City College of Technology)\, R
onnie Rodgers (University of Southampton)\, Brandon Robinson (University o
f Southampton)\, John Estes (Long Island University)\, Andy O'Bannon (Univ
ersity of Southampton)\n\nM-theory is a candidate for a theory of quantum
gravity. Its fundamental objects are called M2-branes and M5-branes. The l
ow-energy theory describing coincident M5-branes is poorly understood in m
any respects\, with holography providing one of the most useful tools to f
urther that understanding. It is known that the theory should possess soli
tonic solutions called "self-dual strings". I will review the holographic
description of these strings\, and show how calculation of entanglement en
tropy provides a way of calculating an important quantity characterising t
hem: their central charge.\n\nhttps://conference.ippp.dur.ac.uk/event/748/
contributions/4304/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4304/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The orientifold quotient of giant gravitons
DTSTART;VALUE=DATE-TIME:20181219T155500Z
DTEND;VALUE=DATE-TIME:20181219T161500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4305@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Christopher Lewis-Brown (Queen Mary University of Lo
ndon)\n\nThe AdS/CFT correspondence links type IIB string theory on $AdS_5
\\times S^5$ to $\\mathcal{N}=4$ super Yang-Mills with gauge group $U(N)$
. In 1998\, Witten showed that taking an orientifold quotient of the $S^5
$ factor - identifying anti-podal points so as to replace $S^5$ with $\\ma
thbb{RP}^5$ - can be understood on the gauge theory side by replacing the
$U(N)$ gauge group with either $SO(N)$ or $Sp(N)$. I will talk about this
quotient from the gauge theory point of view\, focusing on the half-BPS se
ctor. This corresponds to taking the quotient of rotating D3-brane states\
, also called giant gravitons. The mathematics of this quotient leads to s
urprising connections with plethysms and domino tableaux\, which can be ti
ed back to intuitive notions of how the orientifold acts on the branes.\n\
nhttps://conference.ippp.dur.ac.uk/event/748/contributions/4305/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4305/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Renormalization Group Properties of the Conformal Mode
DTSTART;VALUE=DATE-TIME:20181219T173500Z
DTEND;VALUE=DATE-TIME:20181219T175500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4308@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Matthew Kellett (University of Southampton)\n\nThe r
enormalization group properties of a QFT are of profound importance to the
theory. In quantum gravity\, one runs into the problem that the kinetic t
erm for the dilaton (or conformal mode) has the wrong sign\, causing the E
uclidean partition function to be (worse than usually) ill-defined. Imposi
ng a new quantization condition allows us to not only make sense of this\,
but also potentially would allow us to use standard RG techniques to quan
tize gravity. We see that the effect of resolving this conformal mode "ins
tability" (as described by Hawking et. al.) is to constrain the size of th
e manifold by its homogeneity. I will present an outline of how this is do
ne and some results from studies of the torus. If time permits\, I will al
so outline ongoing and future work in this area.\n\nhttps://conference.ipp
p.dur.ac.uk/event/748/contributions/4308/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4308/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Heterotic M2-Branes
DTSTART;VALUE=DATE-TIME:20181219T171000Z
DTEND;VALUE=DATE-TIME:20181219T173000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4310@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Rishi Mouland (King’s College London)\n\nM-Theory
has been conjectured as a single theory in which we can find each of the v
arious superstring theories\, and as such provides a UV completion of 11d
supergravity. Instead of strings\, we have M2-branes and M5-branes. The cl
assic Horava-Witten result says that a compactification of M-theory on $S^
1/\\mathbb{Z}_2$ retrieves the $E_8\\times E_8$ heterotic theory\, with th
e wrapped M2-brane as the "fundamental" string. In this work\, we reproduc
e this result from the perspective of the ABJM theory\, a world volume the
ory conjectured to capture the low-energy behaviour of multiple M2-branes.
In particular\, we find that the subtle nature of Chern-Simons matter the
ories delivers a new perspective on the GSO projection and the non-supersy
mmetric $SO(16)\\times SO(16)$ heterotic theory.\n\nhttps://conference.ipp
p.dur.ac.uk/event/748/contributions/4310/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4310/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Clustering algorithms for b-jets from BSM Higgs Bosons.
DTSTART;VALUE=DATE-TIME:20181220T090000Z
DTEND;VALUE=DATE-TIME:20181220T092000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4312@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Billy Ford (University of Southampton)\n\nIt is long
established that the Standard Model is not a complete theory of nature an
d at the LHC we hope to see hints of some new physics beyond our current u
nderstanding. This project seeks to improve current techniques of jet clus
tering\, in particular from some extended BSM Higgs sector\, such as those
in 2 Higgs Doublet Models\, which include additional particles alongside
the 125 GeV SM Higgs detected in 2012.\n\nhttps://conference.ippp.dur.ac.u
k/event/748/contributions/4312/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4312/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Towards a classification of supersymmetric spacetimes
DTSTART;VALUE=DATE-TIME:20181220T101500Z
DTEND;VALUE=DATE-TIME:20181220T103500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4319@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Ross Grassie\n\nIn this talk\, we present a deformat
ion theoretic approach to classifying supersymmetric spacetimes. \n\nIt i
s a postulate of general relativity that spacetime is described by a four-
dimensional Lorentzian manifold. However\, it is not always convenient to
use this description. For example\, it may be easier to take the Newtoni
an limit and work with theories at lower energies. These non-relativistic
spacetimes are still useful descriptions and should be incorporated in ou
r classification. \n\nTo this end\, we notice that the above postulate ha
s an important consequence: the spacetime manifold is fully described by i
ts relativity group. Therefore\, we do not ask for manifolds whose relati
vity group is the Poincaré group\, but for geometries with some relativit
y group. We will show that these groups may be described by kinematical L
ie algebras and give the classification of these algebras. We then show h
ow this programme is being extended to the supersymmetric case.\n\nhttps:/
/conference.ippp.dur.ac.uk/event/748/contributions/4319/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4319/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Supergravity on a 3-Torus: Quantum Linearisation Instabilities wit
h a Supergroup
DTSTART;VALUE=DATE-TIME:20181219T173500Z
DTEND;VALUE=DATE-TIME:20181219T175500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4311@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Lasse Schmieding (University of York)\n\nFor closed
universes\, the Einstein equations (EE) are linearisation unstable. Pertur
bing around any background with Killing symmetries the linearised EE admit
solutions which are not themselves linearisations of solutions to the non
-linear EE. To control these spurious solutions\, quadratic linearisation
stability conditions are imposed. However\, in the quantum theory these st
ability conditions require that all physical states must be invariant unde
r the background symmetries\, which can complicate the construction of the
physical Hilbert space. I will review linearisation stability conditions
in both classical and quantum gravity\, and then discuss a simple supersy
mmetric model to study quantum linearisation instabilities with a supergro
up.\n\nhttps://conference.ippp.dur.ac.uk/event/748/contributions/4311/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4311/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Different aspects of single top quark and DM channel
DTSTART;VALUE=DATE-TIME:20181220T095000Z
DTEND;VALUE=DATE-TIME:20181220T101000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4314@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Charanjit Kaur Khosa (University of Sussex)\n\nRecen
tly it has been pointed out that associated production of dark matter with
single top quark could also provide an interesting reach for dark matter
(DM) searches at LHC. I will discuss this in context of simplified dark ma
tter models and in two Higgs doublet model. The top quark produced via thi
s channel is polarized and the polarization depends on the CP of the media
tor (simplified dark matter model with spin-0 mediators). I will also talk
about the top polarization sensitive angular observables\, which along wi
th the cross-section\, could be used to probe the CP property of the media
tor.\n\nhttps://conference.ippp.dur.ac.uk/event/748/contributions/4314/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4314/
END:VEVENT
BEGIN:VEVENT
SUMMARY:What do knots\, quantum computation and field theories have in com
mon?
DTSTART;VALUE=DATE-TIME:20181220T090000Z
DTEND;VALUE=DATE-TIME:20181220T092000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4316@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Rajath Radhakrishnan (Queen Mary University of Londo
n)\n\nKnots are deceivingly simple mathematical objects. Showing whether t
wo knots are the same or not is a hard problem. While it can be done easil
y by inspection for simple knots\, the problem becomes hard very quickly.
Ideally\, to distinguish between inequivalent knots we have to define knot
invariants. At first sight\, this may not have anything to do with quantu
m computation or field theories. However\, it turns out that these subject
s are intimately related to each other through an algebraic object called
a modular tensor category (MTC). In this talk\, I will describe an MTC and
explain how it forms the bridge between the aforementioned topics.\n\nhtt
ps://conference.ippp.dur.ac.uk/event/748/contributions/4316/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4316/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A Gentle Introduction to Supersymmetric Localization
DTSTART;VALUE=DATE-TIME:20181220T092500Z
DTEND;VALUE=DATE-TIME:20181220T094500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4317@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Matthew Renwick (Department of Mathematical Sciences
\, Durham University)\n\nLocalization is a powerful technique utilised in
supersymmetric field theories to reduce troublesome infinite dimensional p
ath integrals to pleasant finite dimensional integrals. The aim of this ta
lk is to provide an introduction to this topic and discuss its application
s. In particular\, I will explain how this technique is used to compute th
e exact partition function and the expectation values for certain operator
s in supersymmetric theories.\n\nhttps://conference.ippp.dur.ac.uk/event/7
48/contributions/4317/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4317/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Resurgence and Non-Perturbative Physics
DTSTART;VALUE=DATE-TIME:20181220T095000Z
DTEND;VALUE=DATE-TIME:20181220T101000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4318@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Philip Glass (Durham University)\n\nDivergent pertur
bation series are prevalent in all of physics. Notable examples include su
ms of Feynman diagrams in QFT and sums over Riemann surfaces in string sca
ttering. I will first give a brief introduction to Resurgence theory\, sta
rting with ways of summing divergent series which will lead us to Borel su
mmation and then looking at the analytic continuation of the path integral
s which will lead us to Resurgence theory. Time permitting I will then dis
cuss Resurgence in the context of $\\mathcal{N}=(2\,2)$ on the 2-sphere us
ing results from SUSY Localization.\n\nhttps://conference.ippp.dur.ac.uk/e
vent/748/contributions/4318/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4318/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Light charged Higgs boson with dominant cb decay from 3HDM and its
search at LHC and future colliders
DTSTART;VALUE=DATE-TIME:20181220T092500Z
DTEND;VALUE=DATE-TIME:20181220T094500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4313@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Muyuan Song (University of Southampton)\, Stefano Mo
retti (University of Southampton\,Rutherford Appleton Laboratory)\, Andrew
Akeroyd (University of Southampton)\n\nI am working with Professor Stefan
o Moretti and Doctor Andrew Akeroyd on charged Higgs phenomenology in the
University of Southampton recently. We posted the paper in October 2018 on
arXiv:1810.05403.\n\nThe possibility of a light charged Higgs boson H± t
hat decays predominantly to quarks (cs and/or cb) and with a mass in the r
ange 80 GeV ≤ mH± ≤ 90 GeV is studied in the context of Three- Higgs-
Doublet Models (3HDMs). At present the Large Hadron Collider (LHC) has lit
tle sensitivity to this scenario\, and currently the best constraints are
from LEP2 and Tevatron searches. The branching ratio of H± → cb can be
dominant in two of the five types of 3HDM\, and we determine the parameter
space where this occurs. The decay H± → cb has recently been searched
for at the LHC for the first time\, and with increased integrated luminosi
ty one would expect sensitivity to the region 80 GeV ≤ mH± ≤ 90 GeV d
ue to the smaller backgrounds with respect to H± → cs decays.\n\nhttps:
//conference.ippp.dur.ac.uk/event/748/contributions/4313/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4313/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Non-Minimal Flavour Violation in the MSSM from a flavoured SU(5) G
UT
DTSTART;VALUE=DATE-TIME:20181220T101500Z
DTEND;VALUE=DATE-TIME:20181220T103500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4315@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Bjorn Herrmann (LAPTh)\, Steve King (University of S
outhampton)\, Sam Rowley (University of Southampton)\, Jordan Bernigaud (L
APTh)\n\nWe study flavour-violation in a SU(5) setup inspired by flavoured
GUTs. We investigate the impact of various observables at low scales on
the high-energy parameters of the theory including mu->e gamma and the rel
ic density of dark matter. An interesting interplay between the quark and
lepton sectors becomes apparent due to the cohabitation of various fields
in representations of the unifying group. Correlations between high scale
parameters in the context of current experimental flavour data are shown t
o manifest. We show that movement away from the Minimal Flavour Violation
paradigm is perfectly possible within the context of current limits.\n\nht
tps://conference.ippp.dur.ac.uk/event/748/contributions/4315/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4315/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quasi-Degenerate Vacua in the KSVZ axion model\; A minimal approac
h to dark energy and dark matter
DTSTART;VALUE=DATE-TIME:20181219T144000Z
DTEND;VALUE=DATE-TIME:20181219T150000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4320@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: John McDonald (Lancaster University)\, Amy Lloyd-Stu
bbs (Lancaster University)\n\nI will present a study of the KSVZ axion mod
el with quasi-degenerate vacua as a minimal model for dark energy and dark
matter. I will review axions as dark matter and provide an explanation fo
r dark energy in the form of a difference in vacuum energy density between
the electroweak vacuum and a second degenerate minimum in the effective p
otential\, which can be achieved via the scalar threshold effect.\n\nhttps
://conference.ippp.dur.ac.uk/event/748/contributions/4320/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4320/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Production and thermalisation of isolated sectors
DTSTART;VALUE=DATE-TIME:20181219T150500Z
DTEND;VALUE=DATE-TIME:20181219T152500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4321@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Hannah Tillim (University of Oxford)\, Stephen West
(University of Oxford)\, John March-Russell (University of Oxford)\, Rudin
Petrossian-Byrne (University of Oxford)\, Olivier Lennon (University of O
xford)\n\nAn increasingly attractive alternative to the WIMP model is that
of an `isolated' dark sector - i.e. one which interacts with the standard
model only via gravity and which therefore is unbounded by direct detecti
on. We present a possible production mechanism for this sector in the earl
y Universe (Hawking emission from primordial black holes) as well as predi
ctions for the subsequent evolution and ultimate fate of initially highly
non-equilibrium populations.\n\nhttps://conference.ippp.dur.ac.uk/event/74
8/contributions/4321/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4321/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum Gravity and the dilaton portal
DTSTART;VALUE=DATE-TIME:20181220T121500Z
DTEND;VALUE=DATE-TIME:20181220T123500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4327@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Alex Mitchell-Lister (University of Southampton)\n\n
In this brief talk I discuss two aspects of a novel approach to quantum gr
avity\, the first of these is the construction of evanescent operators of
the dilaton which provides an initial direction to finding solutions to th
e inherent problems of non-renormalizability of quantum gravity. The secon
d is the use of the Batalin-Vilkovisky anti-field technique and how this c
an be used with cohomological techniques to restrict the terms in our acti
on. Following this\, and time permitting\, a brief review of present and
future work will be discussed.\n\nhttps://conference.ippp.dur.ac.uk/event/
748/contributions/4327/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4327/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Semiclassical gravity in the far field of stars and black holes
DTSTART;VALUE=DATE-TIME:20181220T112500Z
DTEND;VALUE=DATE-TIME:20181220T114500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4325@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Jake Percival (University of Sheffield)\n\nIn semicl
assical gravity\, the expectation value of the stress-energy operator $\\l
eft\\langle T_{\\mu\\nu}\\right\\rangle$ is an infinite quantity. To avoi
d having to renormalize it\, one can calculate the difference in $\\left\\
langle T_{\\mu\\nu}\\right\\rangle$ between a pair of quantum states in s
uch a manner that the divergent parts cancel. However\, another technique
explored more recently is to take the difference in $\\left\\langle T_{\\m
u\\nu}\\right\\rangle$ between two different spacetimes\, while in the sa
me quantum state. I will summarize prior work on this method and detail ho
w we have applied it to calculate the difference $\\Delta\\left\\langle T_
{\\mu\\nu}\\right\\rangle$ between the spacetimes of a non-Newtonian star
and a Schwarzschild black hole.\n\nhttps://conference.ippp.dur.ac.uk/even
t/748/contributions/4325/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4325/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Coincident M5-branes and dual singular geometries
DTSTART;VALUE=DATE-TIME:20181219T150500Z
DTEND;VALUE=DATE-TIME:20181219T152500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4337@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Callum Brodie (University of Oxford)\n\nThrough a we
b of string dualities\, M5-brane configurations in M-theory can be mapped
to geometrical features. In particular\, I will discuss this map via heter
otic/F-theory duality\, using a Horava-Witten description of heterotic $\\
mathrm{E}_8 \\times \\mathrm{E}_8$ string theory as the connection to M-th
eory. Intersecting or coincident M5-branes are mapped to singular base geo
metries in F-theory\, which also correspond to singular geometries in Type
IIB string theory. I will explain these dualities\, and if I have time I
will discuss geometrical transitions corresponding to deforming M5-brane c
onfigurations and point out some cute connections with toric geometry.\n\n
https://conference.ippp.dur.ac.uk/event/748/contributions/4337/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4337/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anisotropies in the stochastic gravitational-wave background
DTSTART;VALUE=DATE-TIME:20181219T155500Z
DTEND;VALUE=DATE-TIME:20181219T161500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4323@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Alex Jenkins (King's College London)\n\nIn the new e
ra of gravitational-wave astronomy\, one of the most exciting targets for
future observations is the stochastic gravitational-wave background (SGWB)
. While we have yet to detect the SGWB\, we expect that by studying the an
gular power spectrum of its anisotropies\, we may learn about the large-sc
ale structure of the Universe (analogous to studies of the CMB). With this
in mind\, we develop detailed models of the SGWB anisotropies from two im
portant sources of gravitational waves: unresolved compact binary coalesce
nces\, and cosmic strings.\n\nhttps://conference.ippp.dur.ac.uk/event/748/
contributions/4323/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4323/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravity amplitudes\, observables and classical scattering
DTSTART;VALUE=DATE-TIME:20181220T110000Z
DTEND;VALUE=DATE-TIME:20181220T112000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4324@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Maybee Ben (University of Edinburgh)\, Justin Vines\
, David Kosower\, Donal O'Connell\n\nModern amplitudes techniques offer th
e tantalising possibility of greatly simplifying theoretical predictions f
or precision gravitational wave astronomy. One exciting example is the dou
ble copy\, an enigmatically simple connection between Yang-Mills theory an
d gravity. In this talk I will discuss our recent work on rigorously obtai
ning classical scattering observables from quantum amplitudes\, and why th
e double copy makes this pertinent for gravitational radiation.\n\nhttps:/
/conference.ippp.dur.ac.uk/event/748/contributions/4324/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4324/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Renormalised vacuum polarisation on topological black holes
DTSTART;VALUE=DATE-TIME:20181220T115000Z
DTEND;VALUE=DATE-TIME:20181220T121000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4326@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Thomas Morley (University of Sheffield)\n\nAnti-de S
itter spacetime is a solution of Einstein’s equations with a negative co
smological constant. This fact allows for unusual black hole solutions wit
h non-spherical horizon topology. We calculate the renormalised vacuum pol
arisation for black holes with spherical\, flat and hyperbolic event horiz
ons\, following the “extended coordinates” method\, which uses a mode-
sum representation for the Hadamard parametrix. Renormalisation counter te
rms are subtracted from the Green’s function mode-by-mode\, leaving each
individual term manifestly finite.\n\nhttps://conference.ippp.dur.ac.uk/e
vent/748/contributions/4326/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4326/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shedding Light on the Initial Conditions of Inflation with the Eis
enhart Lift
DTSTART;VALUE=DATE-TIME:20181219T153000Z
DTEND;VALUE=DATE-TIME:20181219T155000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4322@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Kieran Finn (University of Manchester)\, Sotirios Ka
ramitsos (University of Manchester)\n\nThe Hot Big Bang model of cosmology
requires very finely-tuned initial conditions in order to explain the deg
ree of flatness and homogeneity we observe in the Universe today. This has
led the community to embrace the theory of inflation\, since it readily e
xplains these features. But are the initial conditions required to initiat
e inflation more or less finely-tuned than those required by the Hot Big B
ang? Although there are several qualitative arguments to suggest that infl
ation should happen generically\, attempts to quantify these have led to a
mbiguous answers due to the infinite measure of the total phase space. Pre
vious studies have regularised this measure to get an unambiguous answer\,
but the results are strongly dependent on the regularisation technique us
ed with some authors concluding that inflation is exponentially likely whi
le others conclude that it is exponentially unlikely.\n\nThe Eisenhart lif
t\, which was recently applied to field theories for the first time\, is a
technique that allows one to convert a theory described by a Lagrangian i
nto an equivalent geometric system. Applying the Eisenhart lift to inflati
on\, one can construct a manifold such that each point represents a differ
ent initial condition. Both the total volume of this manifold and the volu
me that leads to inflation is finite. Thus\, we can finally answer quantit
atively how finely-tuned the initial conditions of inflation are without t
he need for a regulator.\n\nhttps://conference.ippp.dur.ac.uk/event/748/co
ntributions/4322/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4322/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Global Fixed Points of Scalar and Fermionic Theories
DTSTART;VALUE=DATE-TIME:20181219T171000Z
DTEND;VALUE=DATE-TIME:20181219T173000Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4307@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Daniel Litim (University of Sussex)\, Bradley Garlan
d (University of Sussex)\n\nInteracting fixed points in three dimensions h
ave been investigated using modern renormalisation group methods. Investig
ations focus on the seminal Wilson-Fisher fixed point solution in O(N) sym
metric scalar theories and asymptotically safe UV fixed points in fermioni
c Gross-Neveu models. The main novelty of the study is the use of Padé ap
proximants. Padé approximants have been used to extend local fixed point
data that is obtained from polynomial expansions and hence\, only valid fo
r small field values to global fixed point solutions for all field values.
For both the scalar and fermionic theories this approach is tested in the
Large N limit where explicit analytic fixed point solutions can be found.
Particular emphasis is put on the large real field and the large imaginar
y field limits\, and converging-limiting singularities in the complex fiel
d plane. Finite N models have also been tested for the O(N) symmetric scal
ar theories. Here exact solutions are not accessible and Padé approximant
s have been used to make predictions beyond the radius of convergence of p
olynomial expansions. Padé approximants have also been used to locate sin
gularities exhibited by the given complexified fixed point solutions. In d
oing this it is seen that the singularities exhibited by Padé approximant
s themselves form patterns of defects in the complexified field plane that
are intimately linked to their ability to converge to high accuracy.\n\nh
ttps://conference.ippp.dur.ac.uk/event/748/contributions/4307/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4307/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fermionically Generated Superstrata
DTSTART;VALUE=DATE-TIME:20181219T164500Z
DTEND;VALUE=DATE-TIME:20181219T170500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4309@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Masaki Shigemori (Nagoya University\, Yukawa Institu
te for Theoretical Physics)\, Nejc Ceplak (Queen Mary\, University of Lond
on)\, Rodolfo Russo (Queen Mary\, University of London)\n\nThe aim of the
talk is to present the construction of a new family of smooth horizonless
solutions of supergravity that have the same charges as the supersymmetric
D1-D5-P black hole. We will begin with a brief review of the Fuzzball pro
posal for black holes\, which states that at the length scale of the horiz
on a new\, fuzzy\, phase takes over\, allowing outside observers to distin
guish between different microstates of the black hole. We will then focus
on the three charge supersymmetric D1-D5-P black hole and review some of
its microstate geometries. We then present a method of obtaining a new f
amily of solutions using supersymmetry generators. The motivation behind
this construction is coming from the dual CFT multiplet structure\, where
these fermionic generators are used to create new linearly independent st
ates in the theory. On the gravity side the geometries dual to these new s
tates are generated by the Killing spinors of AdS$_3 \\times S^3 \\times T
^4$. Hence we present the explicit form of these spinors and use them to c
onstruct new solutions to the supergravity equations. Finally we present t
hese new solutions and show that they are simpler than the ones previously
known with having a fewer number of excited fields.\n\nhttps://conferenc
e.ippp.dur.ac.uk/event/748/contributions/4309/
LOCATION:CM107 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4309/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Developing an amplitude level parton shower.
DTSTART;VALUE=DATE-TIME:20181220T112500Z
DTEND;VALUE=DATE-TIME:20181220T114500Z
DTSTAMP;VALUE=DATE-TIME:20220820T023100Z
UID:indico-contribution-4299@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Jack Holguin (The University of Manchester)\, Jeffre
y Forshaw (The University of Manchester)\n\nPerturbative QCD suffers from
multitudes of large logarithms\, arising from the miscancellation of infra
-red poles. These logarithms can cause enhancements of high order terms an
d spoil perturbative convergence. Historically there has been two disjoint
approaches to solving this problem\; resummations and parton showers. Now
adays resummations are performed at high accuracy and are rigorously defin
ed\, but they are very time consuming. Parton showers are all purpose and
can be implemented computationally. However modern showers are still far f
rom a rigorous definition. We present a new algorithm that aims to unify t
hese two approaches.\n\nhttps://conference.ippp.dur.ac.uk/event/748/contri
butions/4299/
LOCATION:CM101 (Department of Mathematical Sciences)
URL:https://conference.ippp.dur.ac.uk/event/748/contributions/4299/
END:VEVENT
END:VCALENDAR