First measurement of the CP-violating phase in B0s→J/ψ( →e+e−)ϕ decays

First measurement of the CP-violating phase in B0s→J/ψ( →e+e−)ϕ decays

Bibliographic Details
Parent link:	The European Physical Journal C Vol. 81, iss. 11.— 2021.— [1026, 18 p.]
Corporate Authors:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники
Other Authors:	Aaij R. Roel, Beteta C. B. Carlos Abellan, Eydelman S. I. Semen Isaakovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich
Summary:	Title screen A flavour-tagged time-dependent angular analysis of B0s→J/ψϕ decays is presented where the J/ψJ/ψ meson is reconstructed through its decay to an e+e− pair. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8\,Te V, corresponding to an integrated luminosity of 3\,fb−1. The CP-violating phase and lifetime parameters of the B0s system are measured to be ϕs=0.00±0.28±0.07\,rad, ΔΓs=0.115±0.045±0.011\,ps−1 and Γs=0.608±0.018±0.012\,ps−1 where the first uncertainty is statistical and the second systematic. This is the first time that CP-violating parameters are measured in the B0s→J/ψϕ decay with an e+e− pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions.
Language:	English
Published:	2021
Subjects:	электронный ресурс труды учёных ТПУ
Online Access:	http://earchive.tpu.ru/handle/11683/72494 https://doi.org/10.1140/epjc/s10052-021-09711-7
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666718

Internet

http://earchive.tpu.ru/handle/11683/72494
https://doi.org/10.1140/epjc/s10052-021-09711-7