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Observation of the decay Bºs → D-ºφ
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LHCb Collaboration (Including: Back, J. J., Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte, Whitehead, M. (Mark) and Williams, M. P.). (2013) Observation of the decay Bºs → D-ºφ. Physics Letters B, 727 (4-5). pp. 403-411. doi:10.1016/j.physletb.2013.10.057 ISSN 0370-2693.
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WRAP_LCHb_1-s2.0-S0370269313008642-main.pdf - Published Version Available under License Creative Commons Attribution. Download (691Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.physletb.2013.10.057
Abstract
First observation of the decay Bºs → D-ºφ
is reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. The significance of the signal is 6.5 standard deviations. The branching fraction is measured relative to that of the decay Bºs → D-ºK-*º
to be
B(B0s
→D0φ)
B(B0s
→D0K∗0)
= 0.069±0.013 (stat)±0.007 (syst).
The first measurement of the ratio of branching fractions for the decays B0s
→ D0K∗0 and B0 → D0K∗0
is found to be
B(B0s
→D0K∗0)
B(B0→D0K∗0)
= 7.8±0.7 (stat)± 0.3 (syst)± 0.6 ( fs/ fd),
where the last uncertainty is due to the ratio of the B0s
and B0 fragmentation fractions.
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