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Title
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Observation of oscillations
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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 the observation of Bs0-B̅ s0 oscillations from a time-dependent measurement of the Bs0-B̅ s0 oscillation frequency Δms. Using a data sample of 1 fb-1 of pp̅ collisions at √s=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron, we find signals of 5600 fully reconstructed hadronic Bs decays, 3100 partially reconstructed hadronic Bs decays, and 61 500 partially reconstructed semileptonic Bs decays. We measure the probability as a function of proper decay time that the Bs decays with the same, or opposite, flavor as the flavor at production, and we find a signal for Bs0-B̅ s0 oscillations. The probability that random fluctuations could produce a comparable signal is 8×10-8, which exceeds 5σ significance. We measure Δms=17.77±0.10(stat)±0.07(syst) ps-1 and extract |Vtd/Vts|=0.2060±0.0007(Δms)-0.0060+0.0081(Δmd+theor). |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
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2006
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.97.242003
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Volume/pages
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97
:24
(2006)
, p. 242003,1-242003,8
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ISI
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000242888700016
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Full text (Publisher's DOI)
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Full text (open access)
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