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Title: Search for Violations of Lorentz Invariance and CPT Symmetry in B0(s) Mixing
Author: Garrido Beltrán, Lluís
Graugés Pous, Eugeni
Rives Molina, Vicente José
Graciani Díaz, Ricardo
Picatoste Olloqui, Eduardo
Calvo Gómez, Míriam
Gascón Fora, David
Marín Benito, Carla
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Espais de Lorentz
Violació CP (Física nuclear)
Gran Col·lisionador d'Hadrons
Lorentz spaces
CP violation (Nuclear physics)
Large Hadron Collider (France and Switzerland)
Issue Date: 15-Jun-2016
Publisher: American Physical Society
Abstract: Violations of CPT symmetry and Lorentz invariance are searched for by studying interference effects in B-0 mixing and in B-s(0) mixing. Samples of B-0 -> J/psi K-S(0) and B-0(s) -> J/psi K+K- decays are recorded by the LHCb detector in proton-proton collisions at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb(-1). No periodic variations of the particle-antiparticle mass differences are found, consistent with Lorentz invariance and CPT symmetry. Results are expressed in terms of the standard model extension parameter Delta a(mu) with precisions of O(10(-15)) and O(10(-14)) GeV for the B-0 and B-s(0) systems, respectively. With no assumption on Lorentz (non) invariance, the CPT-violating parameter z in the B-s(0) system is measured for the first time and found to be Re(z) = -0.022 +/- 0.033 +/- 0.005 and Im(z) = 0.004 +/- 0.011 +/- 0.002, where the first uncertainties are statistical and the second systematic.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2016, vol. 116, num. 24, p. 241601
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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