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Title
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Measurement of the ratio of branching fractions
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| 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 pp̅ 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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Language
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English
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Source (journal)
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Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
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Publication
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Ridge, N.Y.
:
American Physical Society
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2009
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ISSN
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1550-7998
[print]
1550-2368
[online]
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Volume/pages
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79
:11
(2009)
, p. 112003,1-112003,8
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ISI
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000267701300006
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Full text (Publisher's DOI)
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Full text (open access)
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