We report a measurement of the bottom-strange meson mixing phase βs using the time evolution of Bs0→J/ψ(→μ+μ-)ϕ(→K+K-) 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-1 of integrated luminosity. We report confidence regions in the two-dimensional space of βs and the Bs0 decay-width difference ΔΓs and measure βs∈[-π/2,-1.51]∪[-0.06,0.30]∪[1.26,π/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of βs, we also determine ΔΓs=0.068±0.026(stat)±0.009(syst)  ps-1 and the mean Bs0 lifetime τs=1.528±0.019(stat)±0.009(syst)  ps, which are consistent and competitive with determinations by other experiments.

T. Aaltonen, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, et al. (2012). Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set. PHYSICAL REVIEW LETTERS, 109, 171802-1-171802-8 [10.1103/PhysRevLett.109.171802].

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

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

Abstract

We report a measurement of the bottom-strange meson mixing phase βs using the time evolution of Bs0→J/ψ(→μ+μ-)ϕ(→K+K-) 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-1 of integrated luminosity. We report confidence regions in the two-dimensional space of βs and the Bs0 decay-width difference ΔΓs and measure βs∈[-π/2,-1.51]∪[-0.06,0.30]∪[1.26,π/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of βs, we also determine ΔΓs=0.068±0.026(stat)±0.009(syst)  ps-1 and the mean Bs0 lifetime τs=1.528±0.019(stat)±0.009(syst)  ps, which are consistent and competitive with determinations by other experiments.
2012
T. Aaltonen, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, et al. (2012). Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set. PHYSICAL REVIEW LETTERS, 109, 171802-1-171802-8 [10.1103/PhysRevLett.109.171802].
T. Aaltonen;B. Álvarez González;S. Amerio;D. Amidei;A. Anastassov;A. Annovi;J. Antos;G. Apollinari;J. Appel;T. Arisawa;A. Artikov;J. Asaadi;W. Ashmans...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/154726
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