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Measurement of sin2β from B->J/ψK0S with the CDF detector

CollaborationWith : Clark, Allan Geoffrey / Kambara, Hisanori / Speer, Thomas / Strumia Michelini, Federica / Wu, Xin
Published in Physical Review. D. 2000, vol. 61, no. 07
Abstract This paper reports an updated measurement of the standard model CP violation parameter sin2β using the CDF Detector at Fermilab. The entire run I data sample of 110 pb-1 of proton-antiproton collisions at s√=1.8 TeV is used to identify a signal sample of ∼400 B⃗ J/ψK0S events, where J/ψ⃗ μ+μ- and K0S→π+π-. The flavor of the neutral B meson is identified at the time of production by combining information from three tagging algorithms: a same-side tag, a jet-charge tag, and a soft-lepton tag. A maximum likelihood fitting method is used to determine sin2β=0.79+0.41-0.44(stat+syst). This value of sin2β is consistent with the standard model prediction, based upon existing measurements, of a large positive CP-violating asymmetry in this decay mode.
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CDF COLLABORATION. Measurement of sin2β from B->J/ψK0S with the CDF detector. In: Physical Review. D, 2000, vol. 61, n° 07. doi: 10.1103/PhysRevD.61.072005 https://archive-ouverte.unige.ch/unige:37890

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Deposited on : 2014-06-17

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