Search for $B_{s}^{0}\rightarrow\gamma\gamma$ and a measurement of the branching fraction for $B_{s}^{0}\rightarrow\phi\gamma$ - INSPIRE

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Search for $B_{s}^{0}\rightarrow\gamma\gamma$ and a measurement of the branching fraction for $B_{s}^{0}\rightarrow\phi\gamma$

Belle

Collaboration

Nov 28, 2014

6 pages

Published in:

Phys.Rev.D 91 (2015) 1, 011101

Published: Jan 8, 2015

e-Print:

1411.7771 [hep-ex]

DOI:

10.1103/PhysRevD.91.011101

PDG:

{{\mathit B}_{{{s}}}^{0}}

\rightarrow

{{\mathit \gamma}}{{\mathit \gamma}}

Report number:

BELLE-PREPRINT-2014-18,
KEK-PREPRINT-2014-32

Experiments:

KEK-BF-BELLE

View in:

reference search51 citations

Citations per year

Abstract: (APS)

We search for the decay Bs0→γγ and measure the branching fraction for Bs0→ϕγ using 121.4 fb-1 of data collected at the ϒ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The Bs0→ϕγ branching fraction is measured to be (3.6±0.5(stat)±0.3(syst)±0.6(fs))×10-5, where fs is the fraction of Bs(*)B¯s(*) in bb¯ events. Our result is in good agreement with the theoretical predictions as well as with a recent measurement from LHCb. We observe no statistically significant signal for the decay Bs0→γγ and set a 90% confidence-level upper limit on its branching fraction at 3.1×10-6. This constitutes a significant improvement over the previous result.

Note:

6 pages, 3 figures

14.40.Nd
13.20.He
electron positron: annihilation
electron positron: colliding beams
Upsilon(10870): electroproduction
Upsilon(10870): hadronic decay
B/s0: radiative decay
B/s0: branching ratio: measured
B/s0: branching ratio: upper limit
experimental results

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Figures(8)

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