Measurements of the effective lifetimes in the B<inf>s</inf><sup>0</sup>→K<sup>+</sup>K<sup>-</sup>,<sup>B0</sup>→<sup>K +π-</sup> and Bs0→π+K- decays are presented using 1.0<sup> fb -1</sup> of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes areτBs0→K+K-=1.407±0.016(stat)±0.007(syst) ps,τB0→K+π-=1.524±0.011(stat)±0.004(syst) ps,τBs0→π+K-=1.60±0.06(stat)±0.01(syst) ps. This is the most precise determination to date of the effective lifetime in the Bs0→K+K- decay and provides constraints on contributions from physics beyond the Standard Model to the Bs0 mixing phase and the width difference δ<inf>Γs</inf>. © 2014 The Authors.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Effective lifetime measurements in the Bs0 → K+ K-, B0 → K+ π- and Bs0→π+ K- decays. PHYSICS LETTERS. SECTION B, 736, 446-454 [10.1016/j.physletb.2014.07.051].

Effective lifetime measurements in the Bs0 → K+ K-, B0 → K+ π- and Bs0→π+ K- decays

Borsato, M;CALVI, MARTA;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;KUCHARCZYK, MARCIN;Martinelli, M;
2014

Abstract

Measurements of the effective lifetimes in the Bs0→K+K-,B0K +π- and Bs0→π+K- decays are presented using 1.0 fb -1 of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes areτBs0→K+K-=1.407±0.016(stat)±0.007(syst) ps,τB0→K+π-=1.524±0.011(stat)±0.004(syst) ps,τBs0→π+K-=1.60±0.06(stat)±0.01(syst) ps. This is the most precise determination to date of the effective lifetime in the Bs0→K+K- decay and provides constraints on contributions from physics beyond the Standard Model to the Bs0 mixing phase and the width difference δΓs. © 2014 The Authors.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
2014
736
446
454
none
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Effective lifetime measurements in the Bs0 → K+ K-, B0 → K+ π- and Bs0→π+ K- decays. PHYSICS LETTERS. SECTION B, 736, 446-454 [10.1016/j.physletb.2014.07.051].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/89332
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