First Observation of B{sub s}{sup 0}->D{sub s}{sup +}-K{sup +}- and Measurement of the Ratio of Branching Fractions B(B{sub s}{sup 0}->D{sub s}{sup +}-K{sup +}-)/B(B{sub s}{sup 0}->D{sub s}{sup +}pi{sup -})

Journal Article · Fri Nov 06 00:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.191802· OSTI ID:21370804

Aaltonen, T; Maki, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; Remortel, N van ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Grosso-Pilcher, C; Kim, Y K; Krop, D; Kwang, S; Lee, H S; Paramonov, A A; Schmidt, M A; Shiraishi, S; Shochet, M; Wolfe, C ^[2]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

A combined mass and particle identification fit is used to make the first observation of the decay B{sub s}{sup 0}->D{sub s}{sup +}-K{sup +}- and measure the branching fraction of B{sub s}{sup 0}->D{sub s}{sup +}-K{sup +}- relative to B{sub s}{sup 0}->D{sub s}{sup +}pi{sup -}. This analysis uses 1.2 fb{sup -1} integrated luminosity of pp collisions at sq root(s)=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a B{sub s}{sup 0}->D{sub s}{sup +}-K{sup +}- signal with a statistical significance of 8.1sigma and measure B(B{sub s}{sup 0}->D{sub s}{sup +}-K{sup +}-)/B(B{sub s}{sup 0}->D{sub s}{sup +}pi{sup -})=0.097+-0.018(stat)+-0.009(syst).

• OSTI ID: 21370804
• Journal Information: Physical Review Letters, Vol. 103, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.103.191802; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B NEUTRAL MESONS
BEAM LUMINOSITY
BRANCHING RATIO
D MINUS MESONS
D PLUS MESONS
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
KAONS MINUS
KAONS PLUS
MASS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PIONS MINUS
PROTON-PROTON INTERACTIONS
TEV RANGE 01-10
ACCELERATORS
B MESONS
BARYON-BARYON INTERACTIONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
CYCLIC ACCELERATORS
D MESONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
KAONS
MEASURING INSTRUMENTS
MESONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PIONS
PROTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
STRANGE MESONS
STRANGE PARTICLES
SYNCHROTRONS
TEV RANGE