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Evidence for Decay $B_s^0\to D_s^{(\ast)}D_s^{(\ast)}$ and a Measurement of $\Delta\Gamma_s^{CP}/\Gamma_s$
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
2009 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 102, 091801- p.Article in journal (Refereed) Published
Abstract [en]

We search for the semi-inclusive process Bs0→Ds(*)Ds(*) using 2.8  fb-1 of pp̅ collisions at √s=1.96  TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider. We observe 26.6±8.4 signal events with a significance above background of 3.2 standard deviations yielding a branching ratio of B(Bs0→Ds(*)Ds(*))=0.035±0.010(stat.)±0.011(syst.). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the Bs0 decays resulting in a width difference of ΔΓsCPs=0.072±0.021(stat.)±0.022(syst.).

Place, publisher, year, edition, pages
2009. Vol. 102, 091801- p.
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-33016DOI: 10.1103/PhysRevLett.102.091801OAI: oai:DiVA.org:su-33016DiVA: diva2:282187
Projects
D0
Note
Publikationen har totalt 509 författare, V. Abazov et al. Available from: 2009-12-18 Created: 2009-12-18 Last updated: 2011-08-24Bibliographically approved

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Publisher's full texthttp://dx.doi.org/10.1103/PhysRevLett.102.091801

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