First study of the <i>CP</i>-violating phase and decay-width difference in <i>B<sub>s</sub></i><SUP>0</SUP> → ψ(<i>2S</i>)φ decays



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G
et al (show 759 more authors) (2016) First study of the <i>CP</i>-violating phase and decay-width difference in <i>B<sub>s</sub></i><SUP>0</SUP> → ψ(<i>2S</i>)φ decays. PHYSICS LETTERS B, 762. pp. 253-262.

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Abstract

A time-dependent angular analysis of $B_s^0\to\psi(2S)\phi$ decays is performed using data recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0\invfb collected during Run 1 of the LHC. The CP-violating phase and decay-width difference of the $B_s^0$ system are measured to be $\phi_s = 0.23^{+0.29}_{-0.28} \pm 0.02$ rad and $\Delta\Gamma_s = 0.066^{+0.041}_{-0.044} \pm 0.007$ ps$^{-1}$, respectively, where the first uncertainty is statistical and the second systematic. This is the first time that $\phi_s$ and $\Delta\Gamma_s$ have been measured in a decay containing the $\psi(2S)$ resonance.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-027.html
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 07 Apr 2017 13:04
Last Modified: 12 Oct 2023 03:47
DOI: 10.1016/j.physletb.2016.09.028
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006876