First Observation of Bs0 -&gt; Ds±K∓ and Measurement of the Ratio of Branching Fractions B(Bs0 -&gt; Ds±K∓)/B(Bs0 -&gt; Ds+π−)

CDF Collaboration

doi:10.1103/PhysRevLett.103.191802

Scientific article

Open access

English

First Observation of B_s⁰ -> D_s^±K∓ and Measurement of the Ratio of Branching Fractions B(B_s⁰ -> D_s^±K∓)/B(B_s⁰ -> D_s⁺π−)

ContributorsCDF Collaboration

CollaboratorsClark, Allan Geoffrey; Sfyrla, Anna; Vallecorsa, Sofia; Wu, Xin

Published inPhysical review letters, vol. 103, no. 19, 191802

Publication date2009

Abstract

A combined mass and particle identification fit is used to make the first observation of the decay B0s→D±sK∓ and measure the branching fraction of B0s→D±sK∓ relative to B0s→D+sπ−. This analysis uses 1.2 fb−1 integrated luminosity of pp collisions at s√=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a B0s→D±sK∓ signal with a statistical significance of 8.1σ and measure B(B0s→D±sK∓)/B(B0s→D+sπ−)=0.097±0.018(stat)±0.009(syst).

Affiliation

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

Citation (ISO format)

CDF Collaboration. First Observation of Bs0 -> Ds±K∓ and Measurement of the Ratio of Branching Fractions B(Bs0 -> Ds±K∓)/B(Bs0 -> Ds+π−). In: Physical review letters, 2009, vol. 103, n° 19, p. 191802. doi: 10.1103/PhysRevLett.103.191802

Article (Published version)

Identifiers

PID : unige:38621
DOI : 10.1103/PhysRevLett.103.191802

Commercial URLhttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.103.191802

ISSN of the journal0031-9007

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First Observation of Bs0 -> Ds±K∓ and Measurement of the Ratio of Branching Fractions B(Bs0 -> Ds±K∓)/B(Bs0 -> Ds+π−)

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First Observation of B_s⁰ -> D_s^±K∓ and Measurement of the Ratio of Branching Fractions B(B_s⁰ -> D_s^±K∓)/B(B_s⁰ -> D_s⁺π−)