YTF 22

Session

Poster Session and Dinner

15 Dec 2022, 19:30

Ogden Centre West (OCW) Level 1 (Centre for Particle Theory, Durham)

36. Double Copy: Turning Electricity into Black Holes

Kymani Armstrong-Williams (Queen Mary University of London)

15/12/2022, 19:30

Poster

An open problem in theoretical physics is to combine all four of the fundamental forces of nature into one singular theory. Problematically, gravity has proven difficult to reconcile with the other forces. Recently, relationships between scattering amplitudes in non-abelian gauge theories and theories of quantum gravity have led to the discovery of a relation known as the double copy. The...

42. EFT Wavefunction Coefficients in de Sitter

Connor Armstrong (Durham University)

15/12/2022, 19:30

Poster

The Cosmological Scattering Equations lead to a natural formulation of EFT wavefunction coefficients in de Sitter written in terms of conformal generators in the future boundary. The corresponding integrands can be assembled from simple building blocks (including mass deformations and curvature corrections) leading to a double copy prescription. We can also analyse the operator form of the...

43. Electroweak input schemes in the SMEFT

Tommy Smith (IPPP)

15/12/2022, 19:30

Poster

The electroweak input scheme is a key choice in any phenomenological calculation. The replacement of the Lagrangians bare parameters in favour of differing physical inputs can notably change the results obtained through perturbation theory. In the SM, the effects on the convergence of the perturbative series, are well understood. However, the SMEFT has additional considerations, with differing...

16. Flavour symmetries and Standard Model tests in B->DD decays

Jonathan Davies (University of Manchester (GB))

15/12/2022, 19:30

Poster

The discrepancy between observations, and Standard Model (SM) predictions of the Baryon Asymmetry of the Universe implies the existence of physics beyond the SM, which must include further sources of CP violation- in general with O(1) phases. LHCb has recently made several CP asymmetry measurements for B->DD decays. For such non-leptonic modes, lack of knowledge of long-distance strong...

23. New descriptions of VBS and VBF processes with High Energy Jets

Conor Elrick (University of Edinburgh)

15/12/2022, 19:30

Poster

High Energy Jets (HEJ) is a resummation framework designed to include contributions from high energy logarithms in 𝑠̂ /𝑝2⊥ to all orders in perturbation theory. These logs can become significant at the LHC and future colliders, and are significantly enhanced by the requirement of a large dijet invariant mass or large rapidity separation common in VBF/VBS cuts.

I will present a poster giving...

28. Scheme Dependence in pQCD at the Four Loop Level

Robert Mason

15/12/2022, 19:30

Poster

We consider measurable quantities calculated in massless perturbative QCD in a variety of schemes, including the symmetric momentum subtraction schemes, up to the four-loop level in order to investigate scheme dependence in the perturbative series as a theory lab. Appropriate error values should be attached to estimates of physical results which can be done by asserting that renormalization...

44. Using Helicity to Distinguish Dark Matter Models at Lepton Colliders

Sofie Erner (PhD student at IPPP at Durham University)

15/12/2022, 19:30

Poster

Dark Matter has eluded us for decades and continues to do so. Current lepton colliders are currently being used to set exclusion limits on coupling constants and masses of various dark matter models, but many models would have either identical or too close to distinguish signals in a detector. There is hence a need for methods/observables to separate the signals. We look into whether measuring...