Using data collected with the D0 detector at the Fermilab Tevatron Collider, corresponding to 5:3 fb-1 of integrated luminosity, we search for violation of Lorentz invariance by examining the tt production cross section in lepton + jets final states. We quantify this violation using the standard-model extension framework, which predicts a dependence of the tt production cross section on sidereal time as the orientation of the detector changes with the rotation of the Earth. Within this framework, we measure components of the matrices (CQ)μν33 and (Cu)μν33 containing coefficients used to parametrize violation of Lorentz invariance in the top quark sector. Within uncertainties, these coefficients are found to be consistent with zero.
Hedin, David, "Search for Violation of Lorentz Invariance in Top Quark Pair Production and Decay" (2012). Faculty Peer-Reviewed Publications. 1014.
Department of Physics
We thank the staffs at Fermilab and collaborating institutions and acknowledge support from the DOE and NSF (USA); CEA and CNRS/IN2P3 (France); MON, Rosatom, and RFBR (Russia); CNPq, FAPERJ, FAPESP, and FUNDUNESP (Brazil); DAE and DST (India); Colciencias (Colombia); CONACyT (Mexico); NRF (Korea); FOM (The Netherlands); STFC and the Royal Society (United Kingdom); MSMT and GACR (Czech Republic); BMBF and DFG (Germany); SFI (Ireland); The Swedish Research Council (Sweden); and CAS and CNSF (China). We also acknowledge support from the Indiana University Center for Spacetime Symmetries (IUCSS).
American Physical Society