We present the first measurement of polarization and CP-violating asymmetries in a Bs0 decay into two light vector mesons, Bs0→ϕϕ, and an improved determination of its branching ratio using 295 decays reconstructed in a data sample corresponding to 2.9  fb-1 of integrated luminosity collected by the CDF experiment at the Fermilab Tevatron collider. The fraction of longitudinal polarization is determined to be fL=0.348±0.041(stat)±0.021(syst), and the branching ratio B(Bs0→ϕϕ)=[2.32±0.18(stat)±0.82(syst)]×10-5. Asymmetries of decay angle distributions sensitive to CP violation are measured to be Au=-0.007±0.064(stat)±0.018(syst) and Av=-0.120±0.064(stat)±0.016(syst).

T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2011). Measurement of Polarization and Search for CP Violation in B(s)0→ϕϕ Decays. PHYSICAL REVIEW LETTERS, 107, 261802-1-261802-8 [10.1103/PhysRevLett.107.261802].

Measurement of Polarization and Search for CP Violation in B(s)0→ϕϕ Decays

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2011

Abstract

We present the first measurement of polarization and CP-violating asymmetries in a Bs0 decay into two light vector mesons, Bs0→ϕϕ, and an improved determination of its branching ratio using 295 decays reconstructed in a data sample corresponding to 2.9  fb-1 of integrated luminosity collected by the CDF experiment at the Fermilab Tevatron collider. The fraction of longitudinal polarization is determined to be fL=0.348±0.041(stat)±0.021(syst), and the branching ratio B(Bs0→ϕϕ)=[2.32±0.18(stat)±0.82(syst)]×10-5. Asymmetries of decay angle distributions sensitive to CP violation are measured to be Au=-0.007±0.064(stat)±0.018(syst) and Av=-0.120±0.064(stat)±0.016(syst).
2011
T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2011). Measurement of Polarization and Search for CP Violation in B(s)0→ϕϕ Decays. PHYSICAL REVIEW LETTERS, 107, 261802-1-261802-8 [10.1103/PhysRevLett.107.261802].
T. AALTONEN; B. ÁLVAREZ GONZÁLEZ; S. AMERIO; D. AMIDEI; A. ANASTASSOV; A. ANNOVI; J. ANTOS; G. APOLLINARI; J. APPEL; T. ARISAWA; A. ARTIKOV; J. ASAAD...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/118390
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 46
  • ???jsp.display-item.citation.isi??? 35
social impact