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Published version

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2016-06-15

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cc-by (c) CERN, 2016
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/114426

Search for Violations of Lorentz Invariance and CPT Symmetry in B0(s) Mixing

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https://doi.org/10.1103/PhysRevLett.116.241601

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.

Subject

Espais de Lorentz, Violació CP (Física nuclear), Gran Col·lisionador d'Hadrons

Subject (English)

Lorentz spaces, CP violation (Nuclear physics), Large Hadron Collider (France and Switzerland)

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citation

GARRIDO BELTRÁN, Lluís, et al. Search for Violations of Lorentz Invariance and CPT Symmetry in B0(s) Mixing. Physical Review Letters. 2016. Vol. 116, num. 24, pags. 241601. ISSN 0031-9007. [consulted: 13 of August of 2026]. Available at: https://hdl.handle.net/2445/114426

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