Search for effective Lorentz and CPT violation using ZEUS data

30 Mar 2023, 09:40
20m
103AB (MSU Kellogg Center)

103AB

MSU Kellogg Center

Parallel talk WG3: Electroweak Physics and Beyond the Standard Model WG3

Speaker

Dr Enrico Lunghi (Indiana University)

Description

Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS ep data. Symmetry-violating effects can lead to time-dependent oscillations of otherwise time-independent observables, including scattering cross sections. An analysis using five years of inclusive neutral-current deep inelastic scattering events corresponding to an integrated luminosity of 372 pb-1 at sqrt(s) = 318 Gev has been performed. No evidence for oscillations in sidereal time has been observed within statistical and systematic uncertainties. Constraints, most for the first time, are placed on 42 coefficients parameterising dominant CPT-even dimension-four and CPT-odd dimension-five spin-independent modifications to the propagation and interaction of light quarks.

Submitted on behalf of a Collaboration? Yes

Primary author

Katarzyna Wichmann (Deutsches Elektronen-Synchrotron (DE))

Co-author

Dr Enrico Lunghi (Indiana University)

Presentation materials