Measurement of the CP-violating phase $\phi_s^{J/\psi \phi}$ using the flavor-tagged decay $B_s^0 \rightarrow J/\psi \phi$ in 8 fb$^{-1}$ of $p \overline p$ collisions - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Physical Review D Année : 2012

Measurement of the CP-violating phase $\phi_s^{J/\psi \phi}$ using the flavor-tagged decay $B_s^0 \rightarrow J/\psi \phi$ in 8 fb$^{-1}$ of $p \overline p$ collisions

V.M. Abazov
  • Fonction : Auteur
E. Kajfasz
P. Verdier

Résumé

We report an updated measurement of the CP-violating phase, $\phi_s^{J/\psi \phi}$, and the decay-width difference for the two mass eigenstates, $\Delta \Gamma_s$, from the flavor-tagged decay $B_s^0 \rightarrow J/\psi \phi$. The data sample corresponds to an integrated luminosity of 8.0 fb$^{-1}$ accumulated with the D0 detector using $p \overline p$ collisions at $\sqrt{s} = 1.96$ TeV produced at the Fermilab Tevatron collider. The 68% confidence level intervals, including systematic uncertainties, are $\Delta \Gamma_s = 0.163 +0.065 -0.064 ps^{-1}$ and $\phi_s^{J/\psi \phi} = -0.55 +0.38 -0.36$. The $p$-value for the Standard Model point is 29.8%.
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Dates et versions

in2p3-00623831 , version 1 (21-09-2023)

Identifiants

Citer

V.M. Abazov, F. Badaud, U. Bassler, G. Bernardi, M. Besancon, et al.. Measurement of the CP-violating phase $\phi_s^{J/\psi \phi}$ using the flavor-tagged decay $B_s^0 \rightarrow J/\psi \phi$ in 8 fb$^{-1}$ of $p \overline p$ collisions. Physical Review D, 2012, 85, pp.032006. ⟨10.1103/PhysRevD.85.032006⟩. ⟨in2p3-00623831⟩
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