Phenomenology 2023 Symposium

Session

SM IV

May 9, 2023, 4:30 PM

Lawrence Hall 120

Conveners

SM IV

• Dorival Gonçalves (Oklahoma State University)

201. Variant Nelson-Barr Mechanism with Minimal Flavor Violation

GEORGE WOJCIK

5/9/23, 4:30 PM

Within the general framework of using spontaneous CP violation to solve the strong CP problem, we construct a variant Nelson-Barr model in which the Standard Model (SM) quark contribution to the strong CP phase is cancelled by new heavy QCD-charged fermions. This cancellation is ensured by choosing conjugate representations for the new colored states under the same global flavor symmetry of SM...

61. CPV Searches @ COLLIDERS

Amarjit Soni

5/9/23, 4:45 PM

BSM

Due to naturalness arguments we must continue our quest for CPV at all
frontiers. This is of course esp. so @ LHC. New experimental efforts with
additional expt. + theory inputs will be highlighted.

159. A new statistical model for estimating PDF uncertainties

Kirtimaan Ajaykant Mohan

5/9/23, 5:00 PM

Parton distribution functions (PDFs) form an essential part of particle physics calculations. Currently, the most precise predictions for these non-perturbative functions are generated through fits to global data. One difficulty that several PDF fitting groups encounter is the presence of tension in data sets that appear to pull the fits in different directions. Several methods to capture the...

113. Precision Electroweak Tensions and a Wide Dark Photon

Evan Petrosky

5/9/23, 5:15 PM

BSM

The dark photon is a well-motivated and well-studied extension to the Standard Model. The strongest bounds on a dark photon with a mass near the Z pole come from precision electroweak analysis while for higher masses, collider bounds dominate. Existing tensions involving the heavy flavor observables, the W boson mass, and the muon magnetic moment motivate a revisiting of the precision...

130. Amplitude/Operator Basis for Chiral Perturbation Theory

Minglei Xiao

5/9/23, 5:30 PM

BSM

The problem of enumerating a complete and independent set of operators for an effective field theory has been solved systematically by the Young Tensor method. In this talk, I am going to present the method adapted for Chiral Perturbation Theory, which introduces the Adler's zero condition to account for the nonlinearly realized symmetry associated with Goldstone bosons. Several subtleties are...

69. Determining the $CP$ Property of the $ht\bar{t}$ Coupling via a Gluon Jet Anisotropy Substructure

Zhite Yu

5/9/23, 5:45 PM

BSM

Determining the $CP$ property of the Higgs boson is important for a precision test of the Standard Model as well as for the search for new physics. We propose a novel jet substructure observable based on the azimuthal anisotropy in a linearly polarized gluon jet that is produced in association with a Higgs boson at hadron colliders, and demonstrate that it provides a new $CP$-odd observable...

283. Timing coincidence search for supernova neutrinos with optical transient surveys

Mr Sean Heston (Center for Neutrino Physics, Department of Physics, Virginia Tech)

Neutrinos

Neutrinos allow us to probe the interiors of stars during core collapse, and detecting them can teach us about the different stages and processes in the collapse. To date, only 24 supernova neutrinos have been detected all originating from a single event, SN1987A. Since then, most studies have focused on two different distance regimes of supernovae neutrinos: Galactic/local events and all past...