Observation of New Charmless Decays of Bottom Hadrons

Journal Article · Fri Jul 17 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.031801· OSTI ID:21347053

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; Wilbur, S ^[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)

We search for new charmless decays of neutral b hadrons to pairs of charged hadrons, using 1 fb{sup -1} of data collected by the CDF II detector at the Fermilab Tevatron. We report the first observation of the B{sub s}{sup 0}->K{sup -}pi{sup +} decay and measure B(B{sub s}{sup 0}->K{sup -}pi{sup +})=(5.0+-0.7(stat)+-0.8(syst))x10{sup -6}. We also report the first observation of charmless b-baryon decays, and measure B(LAMBDA{sub b}{sup 0}->ppi{sup -})=(3.5+-0.6(stat)+-0.9(syst))x10{sup -6} and B(LAMBDA{sub b}{sup 0}->pK{sup -})=(5.6+-0.8(stat)+-1.5(syst))x10{sup -6}. No evidence is found for other modes, and we set the limit B(B{sub s}{sup 0}->pi{sup +}pi{sup -})<1.2x10{sup -6} at 90% C.L.

• OSTI ID: 21347053
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
B MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CYCLIC ACCELERATORS
DECAY
ELEMENTARY PARTICLES
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
HADRONS
KAONS
KAONS MINUS
MEASURING INSTRUMENTS
MESONS
PARTICLE DECAY
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
STRANGE MESONS
STRANGE PARTICLES
SYNCHROTRONS