Measurement of the Forward-Backward Asymmetry in the B{yields}K{sup (*)}{mu}{sup +}{mu}{sup -} Decay and First Observation of the B{sub s}{sup 0}{yields}{phi}{mu}{sup +}{mu}{sup -} Decay

Journal Article · Fri Apr 22 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.161801· OSTI ID:21550315

Aaltonen, T; Brucken, E; Devoto, F; Mehtala, P; Orava, R ^[1]; Alvarez Gonzalez, B; Casal, B; Cuevas, J; Gomez, G; Palencia, E; Rodrigo, T; Ruiz, A; Scodellaro, L; Vila, I; Vilar, R ^[2]; Amerio, S; Dorigo, T; Gresele, A; Lazzizzera, I ^[3]; Amidei, D ^[4]

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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. Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander (Spain)
3. Istituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento, I-35131 Padova (Italy)
4. University of Michigan, Ann Arbor, Michigan 48109 (United States)

We reconstruct the rare decays B{sup +}{yields}K{sup +}{mu}{sup +}{mu}{sup -}, B{sup 0}{yields}K{sup *}(892){sup 0}{mu}{sup +}{mu}{sup -}, and B{sub s}{sup 0}{yields}{phi}(1020){mu}{sup +}{mu}{sup -} in a data sample corresponding to 4.4 fb{sup -1} collected in pp collisions at {radical}(s)=1.96 TeV by the CDF II detector at the Tevatron Collider. Using 121{+-}16 B{sup +}{yields}K{sup +}{mu}{sup +}{mu}{sup -} and 101{+-}12 B{sup 0}{yields}K*{sup 0}{mu}{sup +}{mu}{sup -} decays we report the branching ratios. In addition, we report the differential branching ratio and the muon forward-backward asymmetry in the B{sup +} and B{sup 0} decay modes, and the K{sup *0} longitudinal polarization fraction in the B{sup 0} decay mode with respect to the squared dimuon mass. These are consistent with the predictions, and most recent determinations from other experiments and of comparable accuracy. We also report the first observation of the B{sub s}{sup 0}{yields}{phi}{mu}{sup +}{mu}{sup -} decay and measure its branching ratio BR(B{sub s}{sup 0}{yields}{phi}{mu}{sup +}{mu}{sup -})=[1.44{+-}0.33{+-}0.46]x10{sup -6} using 27{+-}6 signal events. This is currently the most rare B{sub s}{sup 0} decay observed.

• OSTI ID: 21550315
• Journal Information: Physical Review Letters, Vol. 106, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.106.161801; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ASYMMETRY
B NEUTRAL MESONS
BORON IONS
BRANCHING RATIO
DECAY
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
KAONS MINUS
MASS
MUONS MINUS
MUONS PLUS
POLARIZATION
POTASSIUM IONS
PROTON-PROTON INTERACTIONS
TEV RANGE 01-10
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
B MESONS
BARYON-BARYON INTERACTIONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARGED PARTICLES
CYCLIC ACCELERATORS
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
IONS
KAONS
LEPTONS
MATTER
MEASURING INSTRUMENTS
MESONS
MUONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PROTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
STRANGE MESONS
STRANGE PARTICLES
SYNCHROTRONS
TEV RANGE