Mesons comprising a beauty quark and strange quark can oscillate between particle (B0s ) and antiparticle (B0s ) flavour eigen- states, with a frequency given by the mass difference between heavy and light mass eigenstates, Δms. Here we present a mea- surement of Δms using B0s → D−s π+ decays produced in proton–proton collisions collected with the LHCb detector at the Large Hadron Collider. The oscillation frequency is found to be Δms = 17.7683 ± 0.0051 ± 0.0032 ps−1, where the first uncertainty is statistical and the second is systematic. This measurement improves on the current Δms precision by a factor of two. We com- bine this result with previous LHCb measurements to determine Δms = 17.7656 ± 0.0057 ps−1, which is the legacy measurement of the original LHCb detector.

Precise determination of the Bs0 – B¯s0 oscillation frequency / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: NATURE PHYSICS. - ISSN 1745-2481. - 18:1(2022). [10.1038/s41567-021-01394-x]

Precise determination of the Bs0 – B¯s0 oscillation frequency

Casse, G.;Sarti, A.;
2022

Abstract

Mesons comprising a beauty quark and strange quark can oscillate between particle (B0s ) and antiparticle (B0s ) flavour eigen- states, with a frequency given by the mass difference between heavy and light mass eigenstates, Δms. Here we present a mea- surement of Δms using B0s → D−s π+ decays produced in proton–proton collisions collected with the LHCb detector at the Large Hadron Collider. The oscillation frequency is found to be Δms = 17.7683 ± 0.0051 ± 0.0032 ps−1, where the first uncertainty is statistical and the second is systematic. This measurement improves on the current Δms precision by a factor of two. We com- bine this result with previous LHCb measurements to determine Δms = 17.7656 ± 0.0057 ps−1, which is the legacy measurement of the original LHCb detector.
2022
Forward physics, Hadron-Hadron scattering (experiments), Minimum bias, Particle and resonance production, QCD
01 Pubblicazione su rivista::01a Articolo in rivista
Precise determination of the Bs0 – B¯s0 oscillation frequency / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: NATURE PHYSICS. - ISSN 1745-2481. - 18:1(2022). [10.1038/s41567-021-01394-x]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1673125
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