A time-dependent angular analysis of Bs0→ψ(2S)ϕ decays is performed using data recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0fb−1 collected during Run 1 of the LHC. The CP-violating phase and decay-width difference of the Bs0 system are measured to be ϕs=0.23−0.28+0.29±0.02rad and ΔΓs=0.066−0.044+0.041±0.007ps−1, respectively, where the first uncertainty is statistical and the second systematic. This is the first time that ϕs and ΔΓs have been measured in a decay containing the ψ(2S) resonance.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2016). First study of the CP-violating phase and decay-width difference in Bs0→ψ(2S)ϕ decays. PHYSICS LETTERS. SECTION B, 762, 253-262 [10.1016/j.physletb.2016.09.028].

First study of the CP-violating phase and decay-width difference in Bs0→ψ(2S)ϕ decays

BELLOLI, NICOLETTA;BORGHERESI, ALESSIO;Borsato, M;CALVI, MARTA;CARNITI, PAOLO;CASSINA, LORENZO;FAZZINI, DAVIDE;GOTTI, CLAUDIO;GRILLO, LUCIA;Martinelli, M;MATTEUZZI, CLARA;Petruzzo, M;
2016

Abstract

A time-dependent angular analysis of Bs0→ψ(2S)ϕ decays is performed using data recorded by the LHCb experiment. The data set corresponds to an integrated luminosity of 3.0fb−1 collected during Run 1 of the LHC. The CP-violating phase and decay-width difference of the Bs0 system are measured to be ϕs=0.23−0.28+0.29±0.02rad and ΔΓs=0.066−0.044+0.041±0.007ps−1, respectively, where the first uncertainty is statistical and the second systematic. This is the first time that ϕs and ΔΓs have been measured in a decay containing the ψ(2S) resonance.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
2016
762
253
262
none
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2016). First study of the CP-violating phase and decay-width difference in Bs0→ψ(2S)ϕ decays. PHYSICS LETTERS. SECTION B, 762, 253-262 [10.1016/j.physletb.2016.09.028].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/154180
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