Measurement of Polarization and Search for CP Violation in B{sub s}{sup 0}{yields}{phi}{phi} Decays

Journal Article · Fri Dec 23 04:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.107.261802· OSTI ID:21612573

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; Vizan, J ^[2]; Amerio, S; Dorigo, T; Totaro, P ^[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 present the first measurement of polarization and CP-violating asymmetries in a B{sub s}{sup 0} decay into two light vector mesons, B{sub s}{sup 0}{yields}{phi}{phi}, and an improved determination of its branching ratio using 295 decays reconstructed in a data sample corresponding to 2.9 fb{sup -1} of integrated luminosity collected by the CDF experiment at the Fermilab Tevatron collider. The fraction of longitudinal polarization is determined to be f{sub L}=0.348{+-}0.041(stat){+-}0.021(syst), and the branching ratio B(B{sub s}{sup 0}{yields}{phi}{phi})=[2.32{+-}0.18(stat){+-}0.82(syst)]x10{sup -5}. Asymmetries of decay angle distributions sensitive to CP violation are measured to be A{sub u}=-0.007{+-}0.064(stat){+-}0.018(syst) and A{sub v}=-0.120{+-}0.064(stat){+-}0.016(syst).

• OSTI ID: 21612573
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 107; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ASYMMETRY
B MESONS
B NEUTRAL MESONS
BEAM LUMINOSITY
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
BRANCHING RATIO
CP INVARIANCE
CYCLIC ACCELERATORS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
HADRONS
INVARIANCE PRINCIPLES
MEASURING INSTRUMENTS
MESONS
PARTICLE DECAY
PHI MESONS
POLARIZATION
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SYNCHROTRONS
VECTOR MESONS