Abstract
Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS e±p 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 HERA luminosity of 372 pb-1 at √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 parametrizing dominant CPT-even dimension-four and CPT-odd dimension-five spin-independent modifications to the propagation and interaction of light quarks.
Original language | English |
---|---|
Article number | 092008 |
Journal | Physical Review D |
Volume | 107 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 May 2023 |
Funding
Funding Information: We appreciate the contributions to the construction, maintenance and operation of the ZEUS detector of many people who are not listed as authors. The HERA machine group and the DESY computing staff are especially acknowledged for their success in providing excellent operation of the collider and the data-analysis environment. We thank the DESY directorate for their strong support and encouragement. Supported by the Italian National Institute for Nuclear Physics (INFN). Supported by the German Federal Ministry for Education and Research (BMBF), under Contract No. 05 H09PDF. Supported by the Science and Technology Facilities Council, United Kingdom. Supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). Supported by the German Federal Ministry for Education and Research (BMBF), under contract No. 05h09GUF, and the SFB 676 of the Deutsche Forschungsgemeinschaft (DFG). Supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and its grants for Scientific Research. Supported by the Israel Science Foundation. Supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science. Supported in part by the Science and Technology Facilities Council Grant No. ST/T006048/1. Supported by the Polish National Science Center (NCN) Grant No. DEC-2014/13/B/ST2/02486. Supported by HIR grant UM.C/625/1/HIR/149 and UMRG grants RU006-2013, RP012A-13AFR and RP012B-13AFR from Universiti Malaya, and ERGS grant ER004-2012A from the Ministry of Education, Malaysia. Funding Information: Also at DESY and University of Hamburg, Hamburg, Germany and supported by a Leverhulme Trust Emeritus Fellowship. ** Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics