Precise determination of the B0s-B¯0s oscillation frequency

Precise determination of the B0s-B¯0s oscillation frequency

Bibliographic Details
Parent link:Nature Physics
Vol. 18, iss. 1.— 2022.— [P. 54-58]
Corporate Authors: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники, Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Other Authors: Aaij R. Roel, Beteta C. A. Carlos Abellan, Ackernley T., Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Vagner A. R. Aleksandr Rudolfovich
Summary:Title screen
Mesons comprising a beauty quark and strange quark can oscillate between particle (B0s) and antiparticle (B¯0s) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, Δms. Here we present a measurement of Δms using B0s→D−sπ+ 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 combine 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.
Language:English
Published: 2022
Subjects:
электронный ресурс
труды учёных ТПУ
experimental particle physics
phenomenology
Online Access:http://earchive.tpu.ru/handle/11683/80963
https://doi.org/10.1038/s41567-021-01394-x
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668951
Description
Summary:Title screen
Mesons comprising a beauty quark and strange quark can oscillate between particle (B0s) and antiparticle (B¯0s) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, Δms. Here we present a measurement of Δms using B0s→D−sπ+ 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 combine 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.
DOI:10.1038/s41567-021-01394-x

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