Search for B-s(0) -˃ gamma gamma and a measurement of the branching fraction for B-s(0) -˃ phi gamma

Title
Search for B-s(0) -˃ gamma gamma and a measurement of the branching fraction for B-s(0) -˃ phi gamma
Authors
천병구천병구
Issue Date
2015-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 91, NO 1, Page. 11101-11101
Abstract
We search for the decay B-s(0) -˃ gamma gamma and measure the branching fraction for B-s(0) -˃ phi gamma using 121.4 fb(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric- energy e(+)e(-) collider. The B-s(0) -˃ phi gamma branching fraction is measured to be (3.6 +/- 0.5(stat) +/- 0.3(syst) +/- 0.6(f(s))) x 10(-5), where f(s) is the fraction of B-s(()*())(B) over barB(s)(()*()) in b (b) over bar 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 B-s(0) -˃ gamma gamma and set a 90% confidence- level upper limit on its branching fraction at 3.1 x 10(-6). This constitutes a significant improvement over the previous result.
URI
http://arxiv.org/abs/1411.7771http://hdl.handle.net/20.500.11754/21584
ISSN
2470-0010
DOI
http://dx.doi.org/10.1103/PhysRevD.91.011101
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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