Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set

2012/08/31 by CDF Collaboration, T. Aaltonen, B. Álvarez González +98 · 1 citation
Physics and Astronomy · #B meson #CP violation #Collider #Collider Detector at Fermilab #Fermilab #High-Energy Particle Collisions Research #Large Hadron Collider #Luminosity #Meson #Mixing (physics) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quark #Standard Model (mathematical formulation) #Tevatron #Top quark #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevlett.109.171802

published as Phys. Rev. Lett 109, 171802 (2012) · 8 pages, 2 figures, Phys. Rev. Lett 109, 171802 (2012)

openalex publication_date 2012/10/24 · arxiv created 2012/10/25 · arxiv updated 2014/09/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report a measurement of the bottom-strange meson mixing phase \ensuremathβ_s using the time evolution of B_s⁰\ensuremath→J/\ensuremathψ(\ensuremath→\ensuremathμ⁺\ensuremathμ^\ensuremath-)\ensuremathφ(\ensuremath→K⁺K^\ensuremath-) decays in which the quark-flavor content of the bottom-strange meson is identified at production. This measurement uses the full data set of proton-antiproton collisions at √(s)=1.96 TeV collected by the Collider Detector experiment at the Fermilab Tevatron, corresponding to 9.6 fb^\ensuremath-1 of integrated luminosity. We report confidence regions in the two-dimensional space of \ensuremathβ_s and the B_s⁰ decay-width difference \ensuremathΔ\ensuremathΓ_s and measure \ensuremathβ_s\ensuremath∈[\ensuremath-\ensuremathπ/2,\ensuremath-1.51]\ensuremath∪[\ensuremath-0.06,0.30]\ensuremath∪[1.26,\ensuremathπ/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of \ensuremathβ_s, we also determine \ensuremathΔ\ensuremathΓ_s=0.068\ifmmode±\else\textpm\fi0.026(stat)\ifmmode±\else\textpm\fi0.009(syst) ps^\ensuremath-1 and the mean B_s⁰ lifetime \ensuremathτ_s=1.528\ifmmode±\else\textpm\fi0.019(stat)\ifmmode±\else\textpm\fi0.009(syst) ps, which are consistent and competitive with determinations by other experiments.

Citations

• Observation ofBs0−B¯s0Oscillations
• Review of Particle Physics
• Measurement of theCP-violating phaseβsJ/ψϕinBs0→J/ψϕdecays with the CDF II detector
• Time-integrated and time-dependent angular analyses ofB→J/ψKπ: A measurement ofcos2βwith no sign ambiguity from strong phases
• Precision physics withBs0→J/ψϕat the LHC: The quest for new physics
• In pursuit of new physics withBsdecays
• Measurement of the anomalous like-sign dimuon charge asymmetry with9 fb−1ofpp¯collisions
• Determination of the Sign of the Decay Width Difference in theBs0System

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• Measurement of the CP -violating phaseϕsinB¯s0→J/ψπ+π−decays