Observation of B{sub s}{sup 0}{yields}{phi}{gamma} and Search for B{sub s}{sup 0}{yields}{gamma}{gamma} Decays at Belle

Journal Article · Fri Mar 28 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.121801· OSTI ID:21123778

Wicht, J; Bay, A; Schneider, O; Vervink, K; Villa, S; Zwahlen, N ^[1]; Adachi, I; Haba, J; Hazumi, M; Itoh, R; Iwasaki, Y; Kichimi, H; Nakao, M; Nishida, S; Nozaki, T; Ozaki, H; Sakai, Y; Schuemann, J; Sumisawa, K; Takasaki, F ^[2]

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1. Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We search for the radiative penguin decays B{sub s}{sup 0}{yields}{phi}{gamma} and B{sub s}{sup 0}{yields}{gamma}{gamma} in a 23.6 fb{sup -1} data sample collected at the {upsilon}(5S) resonance with the Belle detector at the KEKB e{sup +}e{sup -} asymmetric-energy collider. We observe for the first time a radiative penguin decay of the B{sub s}{sup 0} meson in the B{sub s}{sup 0}{yields}{phi}{gamma} mode and we measure B(B{sub s}{sup 0}{yields}{phi}{gamma})=(57{sub -15}{sup +18}(stat){sub -11}{sup +12}(syst))x10{sup -6}. No significant B{sub s}{sup 0}{yields}{gamma}{gamma} signal is observed and we set a 90% confidence level upper limit of B(B{sub s}{sup 0}{yields}{gamma}{gamma})<8.7x10{sup -6}.

• OSTI ID: 21123778
• Journal Information: Physical Review Letters, Vol. 100, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.100.121801; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
GAMMA RADIATION
PAIR PRODUCTION
PARTICLE DECAY