Stringent limits on - and Lorentz-invariance violation from ~meson decays
R Aaij, M Abdelfatah, ASW Abdelmotteleb… - arXiv preprint arXiv …, 2026 - arxiv.org
R Aaij, M Abdelfatah, ASW Abdelmotteleb, CA Beteta, F Abudinén, T Ackernley…
arXiv preprint arXiv:2609.02475, 2026•arxiv.orgTests of fundamental symmetries, such as $ C\! PT $ and Lorentz invariance, provide
sensitive probes of physics beyond the standard quantum-field-theory framework. Possible
violations of these symmetries are investigated through interference effects in decays of $
B_s^ 0$ mesons to $ D_s^-\pi^{+} $ states. The analysis uses proton-proton collision data
collected with the LHCb detector in 2015--2018 at a centre-of-mass energy of $13~\mathrm
{TeV} $, corresponding to an integrated luminosity of $6~\mathrm {fb}^{-1} $. The results are …
sensitive probes of physics beyond the standard quantum-field-theory framework. Possible
violations of these symmetries are investigated through interference effects in decays of $
B_s^ 0$ mesons to $ D_s^-\pi^{+} $ states. The analysis uses proton-proton collision data
collected with the LHCb detector in 2015--2018 at a centre-of-mass energy of $13~\mathrm
{TeV} $, corresponding to an integrated luminosity of $6~\mathrm {fb}^{-1} $. The results are …
Tests of fundamental symmetries, such as and Lorentz invariance, provide sensitive probes of physics beyond the standard quantum-field-theory framework. Possible violations of these symmetries are investigated through interference effects in decays of mesons to states. The analysis uses proton-proton collision data collected with the LHCb detector in 2015--2018 at a centre-of-mass energy of , corresponding to an integrated luminosity of . The results are interpreted within the Standard Model Extension framework, yielding sensitivities to the Lorentz-violating parameter at the level. Without assuming Lorentz-invariance violation, the -violating parameter in the system is measured to be and , where the first uncertainties are statistical and the second systematic. These results represent the most precise constraints on violation in the system.
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