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Measurement of the B-s(0)-(B)over-bar(s)(0) oscillation frequency

Abulencia, A; Acosta, D; Adelman, J; Affolder, T; Akimoto, T; Albrow, MG; Ambrose, D; ... Zucchelli, S; + view all (2006) Measurement of the B-s(0)-(B)over-bar(s)(0) oscillation frequency. Physical Review Letters , 97 (6) , Article 062003. 10.1103/PhysRevLett.97.062003. Green open access

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Abstract

We present the first precise measurement of the B-s(0)-(B) over bar (0)(s) oscillation frequency Delta m(s). We use 1 fb(-1) of data from p (p) over bar collisions at root s=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The sample contains signals of 3600 fully reconstructed hadronic B-s decays and 37 000 partially reconstructed semileptonic B-s decays. We measure the probability as a function of proper decay time that the B-s decays with the same, or opposite, flavor as the flavor at production, and we find a signal consistent with B-s(0)-(B) over bar (0)(s) oscillations. The probability that random fluctuations could produce a comparable signal is 0.2%. Under the hypothesis that the signal is due to B-s(0)-(B) over bar (0)(s) oscillations, we measure Delta m(s)=17.31(-0.18)(+0.33)(stat)+/- 0.07(syst) ps(-1) and determine vertical bar V-td/V-ts vertical bar=0.208(-0.002)(+0.001)(expt)(-0.006)(+0.008)(theor).

Type: Article
Title: Measurement of the B-s(0)-(B)over-bar(s)(0) oscillation frequency
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.97.062003
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.97.062003
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: CP-VIOLATION, DETECTOR, PHYSICS, SEARCH, DECAYS
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/131789
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