First observation of the decay B → φ K̄*
Journal of High Energy Physics, ISSN: 1029-8479, Vol: 2013, Issue: 11
2013
- 6Citations
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Article Description
The first observation of the decay B → φK̄* is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb of pp collisions at √s = 7 TeV, collected with the LHCb detector. A yield of 30 ± 6 B → (KK)(K π) decays is found in the mass windows 1012:5 < M(KK) < 1026:5MeV/c and 746 < M(K π) < 1046MeV/c. The signal yield is found to be dominated by B → φK̄* decays, and the corresponding branching fraction is measured to be B(B → φK̄*) = (1:10 ± 0:24 (stat) ± 0:14 (syst) ± 0:08 (f/f )) × 10, where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions f/f which accounts for the different production rate of B and B mesons. The significance of B → φK̄* signal is 6.1 standard deviations. The fraction of longitudinal polarization in B → φK̄* decays is found to be f = 0:51 ± 0:15 (stat) ± 0:07 (syst). Copyright CERN.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84897896104&origin=inward; http://dx.doi.org/10.1007/jhep11(2013)092; https://link.springer.com/10.1007/JHEP11(2013)092; https://link.springer.com/content/pdf/10.1007/JHEP11(2013)092.pdf; https://link.springer.com/article/10.1007/JHEP11(2013)092/fulltext.html; http://link.springer.com/content/pdf/10.1007/JHEP11(2013)092; http://link.springer.com/10.1007/JHEP11(2013)092; http://dx.doi.org/10.1007/jhep11%282013%29092; https://dx.doi.org/10.1007/jhep11%282013%29092; https://link.springer.com/article/10.1007/JHEP11(2013)092
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