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Measurement of the ratio of branching fractions B(B± -> J/ψπ±)/B(B± -> J/ψK±)

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / Moed, Shulamit / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review. D. 2009, vol. 79, no. 11, p. 112003
Abstract We report a measurement of the ratio of branching fractions of the decays B±→J/ψπ± and B±→J/ψK± using the CDF II detector at the Fermilab Tevatron Collider. The signal from the Cabbibo-suppressed B±→J/ψπ± decay is separated from B±→J/ψK± using the B±→J/ψK± invariant mass distribution and the kinematical differences of the hadron track in the two decay modes. From a sample of 220  pb−1 of pp collisions at s√=1.96  TeV, we observe 91±15 B±→J/ψπ± events together with 1883±34 B±→J/ψK± events. The ratio of branching fractions is found to be B(B±→J/ψπ±)/B(B±→J/ψK±)=(4.86±0.82(stat)±0.15(syst))%.
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CDF COLLABORATION. Measurement of the ratio of branching fractions B(B± -> J/ψπ±)/B(B± -> J/ψK±). In: Physical Review. D, 2009, vol. 79, n° 11, p. 112003. https://archive-ouverte.unige.ch/unige:38607

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Deposited on : 2014-07-14

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