We search for annihilation decay modes of neutral b mesons into pairs of charmless charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 6  fb-1 of integrated luminosity, we obtain the first evidence for the Bs0→π+π- decay, with a significance of 3.7σ, and a measured branching ratio B(Bs0→π+π-)=(0.57±0.15(stat)±0.10(syst))×10-6. A search for the B0→K+K- mode in the same sample yields a significance of 2.0σ, and a central value estimate B(B0→K+K-)=(0.23±0.10(stat)±0.10(syst))×10-6.

T. AALTONEN, V. M. ABAZOV, B. ABBOTT, M. ABOLINS, B. S. ACHARYA, M. ADAMS, et al. (2012). Evidence for the Charmless Annihilation Decay Mode Bs0→π+π-. PHYSICAL REVIEW LETTERS, 108, 211803-1-211803-8 [10.1103/PhysRevLett.108.211803].

Evidence for the Charmless Annihilation Decay Mode Bs0→π+π-

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO;
2012

Abstract

We search for annihilation decay modes of neutral b mesons into pairs of charmless charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 6  fb-1 of integrated luminosity, we obtain the first evidence for the Bs0→π+π- decay, with a significance of 3.7σ, and a measured branching ratio B(Bs0→π+π-)=(0.57±0.15(stat)±0.10(syst))×10-6. A search for the B0→K+K- mode in the same sample yields a significance of 2.0σ, and a central value estimate B(B0→K+K-)=(0.23±0.10(stat)±0.10(syst))×10-6.
2012
T. AALTONEN, V. M. ABAZOV, B. ABBOTT, M. ABOLINS, B. S. ACHARYA, M. ADAMS, et al. (2012). Evidence for the Charmless Annihilation Decay Mode Bs0→π+π-. PHYSICAL REVIEW LETTERS, 108, 211803-1-211803-8 [10.1103/PhysRevLett.108.211803].
T. AALTONEN; V. M. ABAZOV; B. ABBOTT; M. ABOLINS; B. S. ACHARYA; M. ADAMS; T. ADAMS; J. ADELMAN; E. AGUILO; G. D. ALEXEEV; G. ALKHAZOV; A. ALTON; B. A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/128162
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