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First observation of the decay B-s(0)-> Ds-Ds+ and measurement of its branching ratio

Aaltonen, T; Adelman, J; Akimoto, T; Albrow, MG; Gonzalez, BA; Amerio, S; Amidei, D; ... CDF Collaboration, The; + view all (2008) First observation of the decay B-s(0)-> Ds-Ds+ and measurement of its branching ratio. Physical Review Letters , 100 (2) , Article 021803. 10.1103/PhysRevLett.100.021803. Green open access

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Abstract

We report the observation of the exclusive decay B-s(0)-> Ds-Ds+ at the 7.5 standard deviation level using 355 pb(-1) of data collected by the CDF II detector in p (p) over bar collisions at root s =1.96 TeV at the Fermilab Tevatron. We measure the relative branching ratio B(B-s(0)-> Ds-Ds+)/B(B-0 -> D-Ds+)=1.44(-0.44)(+0.48). Using the world average value for B(B-0 -> D-Ds+), we find B(B-s(0)-> Ds-Ds+)=(9.4(-4.2)(+4.4))x10(-3). This provides a lower bound Delta Gamma(CP)(s)/Gamma(s)>= 2B(B-s(0)-> Ds-Ds+)> 1.2x10(-2) at 95% C.L.

Type: Article
Title: First observation of the decay B-s(0)-> Ds-Ds+ and measurement of its branching ratio
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.100.021803
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.100.021803
Additional information: © 2008 The American Physical Society
Keywords: HADRONIC COLLISIONS, CROSS-SECTION, CDF
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/131688
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