Observation of Bs0−Bs0 Oscillations

CDF Collaboration

doi:10.1103/PhysRevLett.97.242003

Scientific article

English

Observation of B_s⁰−B_s⁰ Oscillations

Contributors

CDF Collaboration

Collaborators

Campanelli, Mario; Clark, Allan Geoffrey; Donega, Mauro; Moed, Shulamit; Sfyrla, Anna; Vallecorsa, Sofia; Wu, Xin

Published in

Physical review letters, vol. 97, no. 24, 242003

Publication date

2006

Abstract

We report the observation of B0s-B0s oscillations from a time-dependent measurement of the B0s-B0s oscillation frequency Δms. Using a data sample of 1 fb−1 of pp 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 B0s-B0s 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)+0.0081−0.0060(Δmd+theor).

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

CDF Collaboration. Observation of B_s⁰−B_s⁰ Oscillations. In: Physical review letters, 2006, vol. 97, n° 24, p. 242003. doi: 10.1103/PhysRevLett.97.242003

Article (Published version)

Identifiers

PID : unige:38360
DOI : 10.1103/PhysRevLett.97.242003

Additional URL for this publication

http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.97.242003

Journal ISSN

0031-9007

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