Precise determination of the Bs0 – B¯s0 oscillation frequency

Aaij, R; Beteta, CA; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Aidala, CA; Aiola, S; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Albero, AA; Aliouche, Z; Alkhazov, G; Cartelle, PA; Amato, S; Amhis, Y; An, L; Anderlini, L; Andreianov, A; Andreotti, M; Archilli, F; Artamonov, A; Artuso, M; Arzymatov, K; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Bachmayer, M; Back, JJ; Rodriguez, PB; Balagura, V; Baldini, W; Leite, JB; Barlow, RJ; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, JM; Bassi, G; Batsukh, B; Battig, A; Bay, A; Becker, M; Bedeschi, F; Bediaga, I; Beiter, A; Belavin, V; Belin, S; Bellee, V; Belous, K; Belov, I; Belyaev, I; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Berninghoff, D; Bernstein, HC; Bertella, C; Bertolin, A; Betancourt, C; Betti, F; Bezshyiko, I; Bhasin, S; Bhom, J; Bian, L; Bieker, MS; Bifani, S; Billoir, P; Birch, M; Bishop, FCR; Bitadze, A; Bizzeti, A; Bjørn, M; Blago, MP; Blake, T; Blanc, F; Blusk, S; Bobulska, D; Boelhauve, JA; Garcia, OB; Boettcher, T; Boldyrev, A; Bondar, A; Bondar, N; Borghi, S; Borisyak, M; Borsato, M; Borsuk, JT; Bouchiba, SA; Bowcock, TJV; Boyer, A; Bozzi, C; Bradley, MJ; Braun, S

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Authors

Aaij, R

Beteta, CA

Ackernley, T

Adeva, B

Adinolfi, M

Afsharnia, H

Aidala, CA

Publication Date

2022

Journal Title

Nature Physics

ISSN

1745-2473

Publisher

Springer Science and Business Media LLC

Volume

Issue

Pages

1-5

Language

Type

Article

This Version

VoR

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Citation

Aaij, R., Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C., et al. (2022). Precise determination of the Bs0 – B¯s0 oscillation frequency. Nature Physics, 18 (1), 1-5. https://doi.org/10.1038/s41567-021-01394-x

Abstract

Mesons comprising a beauty quark and a strange quark can oscillate between particle (B0s) and antiparticle (B0s) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, deltams. Here we present ameasurement of deltams using B0s2DsPi decays produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. The oscillation frequency is found to be deltams = 17.7683 +- 0.0051 +- 0.0032 ps-1, where the first uncertainty is statistical and the second systematic. This measurement improves upon the current deltams precision by a factor of two. We combine this result with previous LHCb measurements to determine deltams = 17.7656 +- 0.0057 ps-1, which is the legacy measurement of the original LHCb detector.

Keywords

Article, /639/766/419/1131, /639/766/419/1132, /119, article

Identifiers

s41567-021-01394-x, 1394

External DOI: https://doi.org/10.1038/s41567-021-01394-x

This record's URL: https://www.repository.cam.ac.uk/handle/1810/333197

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http://creativecommons.org/licenses/by/4.0/

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