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SUMMARY:Phenomenological signals of QCD critical point in heavy-ion collis
ions
DTSTART;VALUE=DATE-TIME:20160801T090000Z
DTEND;VALUE=DATE-TIME:20160801T092500Z
DTSTAMP;VALUE=DATE-TIME:20211023T232515Z
UID:indico-contribution-535-2954@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Akihiko Monnai (Institut de Physique ThÃ©orique\, CN
RS/CEA)\nThe properties of a QCD medium at finite density is extensively s
tudied in the recent beam energy scan program at BNL Relativistic Heavy Io
n collider. One of the main goals of the program is to understand the QCD
phase structure and to verify the existence of a critical point. A difficu
lty in such analyses is that a signal of the critical point could be therm
ally washed away if its location is far from the freeze-out\, unless its e
ffects on dynamical evolution is sizable enough to modify the freeze-out h
ypersurface.\n\nThe relativistic hydrodynamic model has been proven to be
a powerful tool for heavy-ion analyses in the past decades. In this study\
, we propose to extend the model to lower energies at finite density and e
stimate thermal photon spectra and flow harmonics. Since the medium is ele
ctromagnetically transparent\, there is an advantage that the critical poi
nt does not have to be near the freeze-out for its photonic signal to be d
etectable. We present the results from (2+1)-dimensional hydrodynamic simu
lation and discuss their phenomenological consequences.\n\nhttps://confere
nce.ippp.dur.ac.uk/event/530/contributions/2954/
LOCATION:Plymouth University Portland Square
URL:https://conference.ippp.dur.ac.uk/event/530/contributions/2954/
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SUMMARY:Opening
DTSTART;VALUE=DATE-TIME:20160801T080000Z
DTEND;VALUE=DATE-TIME:20160801T081500Z
DTSTAMP;VALUE=DATE-TIME:20211023T232515Z
UID:indico-contribution-535-2959@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Kurt Langfeld (Plymouth University)\nhttps://confere
nce.ippp.dur.ac.uk/event/530/contributions/2959/
LOCATION:Plymouth University Portland Square
URL:https://conference.ippp.dur.ac.uk/event/530/contributions/2959/
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BEGIN:VEVENT
SUMMARY:Competing order in the fermionic Hubbard model on the hexagonal gr
aphene lattice
DTSTART;VALUE=DATE-TIME:20160801T104000Z
DTEND;VALUE=DATE-TIME:20160801T110500Z
DTSTAMP;VALUE=DATE-TIME:20211023T232515Z
UID:indico-contribution-535-2966@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Lorenz von Smekal (Justus-Liebig University Giessen)
\nWe study the phase diagram of the fermionic Hubbard model on the hexagon
al lattice in the space of on-site and nearest neighbor couplings with Hyb
rid-Monte-Carlo simulations. With pure on-site repulsion this allows to de
termine the critical coupling strength for spin-density wave formation. We
compare the standard approach of introducing a small mass term\, explicit
ly breaking the sublattice symmetry\, with a purely geometric mass\, i.e.
using lattices and boundary conditions such that the Dirac points fall in
between the grid points inside the Brillouin zone without explicit sublatt
ice-symmetry breaking. For the first method we extrapolate the correspondi
ng susceptibility peaks towards zero mass and infinite volume in the usual
way\, while with the geometric mass only infinite volume extrapolation is
needed. An added bonus is that it can be used with nearest neighbor repul
sion and charge-density wave formation where the corresponding mass term w
ould introduce a sign problem. The geometric mass thus provides a promisin
g method to study the competition between these different types of order a
nd the resulting phase diagram with ab-initio simulations.\n\nhttps://conf
erence.ippp.dur.ac.uk/event/530/contributions/2966/
LOCATION:Plymouth University Portland Square
URL:https://conference.ippp.dur.ac.uk/event/530/contributions/2966/
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SUMMARY:Anderson localisation of Dirac eigenmodes in high temperature QCD
DTSTART;VALUE=DATE-TIME:20160801T095500Z
DTEND;VALUE=DATE-TIME:20160801T104000Z
DTSTAMP;VALUE=DATE-TIME:20211023T232515Z
UID:indico-contribution-535-2972@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Guido Cossu (Higgs Centre for Theoretical Physics\,
School of Physics and Astronomy\, University of Edinburgh)\nWe investigate
the properties of the background gauge field configurations that act as d
isorder for the Anderson localization mechanism in the Dirac spectrum of Q
CD at high temperatures. We compute the eigenmodes of the M\\"obius domain
-wall fermion operator on configurations generated for the $SU(3)$ gauge t
heory with two flavors of fermions\, in the temperature range $[0.9\,1.9]T
_c$. We identify the source of localization of the eigenmodes with gauge c
onfigurations that are self-dual and support negative fluctuations of the
Polyakov loop $P_L$\, in the high temperature sea of $P_L\\sim 1$. The dep
endence of these observations on the boundary conditions of the valence op
erator is studied. We also investigate the spatial overlap of the left-han
ded and right-handed projected eigenmodes in correlation with the localiza
tion and the corresponding eigenvalue. We discuss an interpretation of the
results in terms of monopole-instanton structures.\n\nhttps://conference.
ippp.dur.ac.uk/event/530/contributions/2972/
LOCATION:Plymouth University Portland Square
URL:https://conference.ippp.dur.ac.uk/event/530/contributions/2972/
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SUMMARY:The smallest of the Little Bangs: thermalization and collective fl
ow in pp and pA collisions (??!)
DTSTART;VALUE=DATE-TIME:20160801T081500Z
DTEND;VALUE=DATE-TIME:20160801T090000Z
DTSTAMP;VALUE=DATE-TIME:20211023T232515Z
UID:indico-contribution-535-2994@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Ulrich Heinz (The Ohio State University)\nRecent exp
erimental data from p+Pb and high-multiplicity p+p collisions at the LHC\,
as well as p+Au\, d+Au and He3+Au collisions at RHIC\, suggest strongly t
hat the same collective phenomena that have been attributed to hydrodynami
c flow in collisions between heavy nuclei also manifest in qualitatively i
dentical ways in collisions where one or both collision partners are as sm
all as a proton. How can this be??! To resolve this surprise\, I will disc
uss the conditions under which hydrodynamic behavior can be expected\, and
show that modern (resummed) versions of viscous fluid dynamics that accou
nt more efficiently for unavoidable strong local momentum anisotropies in
rapidly and strongly anisotropically expanding systems can quite accuratel
y describe the evolution of fireballs whose local phase-space distribution
is far from thermal equilibrium. I will argue that the largest stumbling
block on the way towards a quantitative dynamical understanding of the evo
lution of small collision systems is not a likely breakdown of the hydrody
namic framework\, but our insufficient knowledge of the internal spatial s
tructure of the proton and its quantum fluctuations from collision event t
o event. Some recent suggestions for improved modelling of the initial-sta
te fluctuations in small collision systems will be reported.\n\nhttps://co
nference.ippp.dur.ac.uk/event/530/contributions/2994/
LOCATION:Plymouth University Portland Square
URL:https://conference.ippp.dur.ac.uk/event/530/contributions/2994/
END:VEVENT
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SUMMARY:Scale-invariance of three-dimensional QED
DTSTART;VALUE=DATE-TIME:20160801T110500Z
DTEND;VALUE=DATE-TIME:20160801T113000Z
DTSTAMP;VALUE=DATE-TIME:20211023T232515Z
UID:indico-contribution-535-3002@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Nikhil Karthik (Florida International University)\nW
e present results from our lattice simulation of parity-invariant\nthree-d
imensional QED with two dynamical flavors of massless\ntwo-component fermi
ons\, implemented using the overlap operator.\nContradictory to the expect
ation from various plausibility arguments\,\nwe find evidences from the fi
nite-size scaling of eigenvalues of the\nDirac operator and from correlat
ors of fermion bilinears\, for the\ntwo flavor theory to be scale-invarian
t with the mass anomalous\ndimension close to 1\, the maximum allowed valu
e for a conformal\nfield theory.\n\nhttps://conference.ippp.dur.ac.uk/even
t/530/contributions/3002/
LOCATION:Plymouth University Portland Square
URL:https://conference.ippp.dur.ac.uk/event/530/contributions/3002/
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