Observation of Υ(2S)→γηb(1S) Decay

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DC Field	Value	Language
dc.contributor.author	Bhardwaj, V.	-
dc.date.accessioned	2020-11-18T04:53:14Z	-
dc.date.available	2020-11-18T04:53:14Z	-
dc.date.issued	2018	-
dc.identifier.citation	Physical Review Letters, 121(23).	en_US
dc.identifier.other	https://doi.org/10.1103/PhysRevLett.121.232001	-
dc.identifier.uri	https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.232001	-
dc.identifier.uri	http://hdl.handle.net/123456789/1740	-
dc.description	Only IISERM authors are available in the record.	-
dc.description.abstract	We report the observation of Υ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectrum of 24.7 fb−1 of e+e− collisions at the Υ(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. We measure a branching fraction of B[Υ(2S)→γηb(1S)]=(6.1+0.6+0.9−0.7−0.6)×10−4 and derive an ηb(1S) mass of 9394.8+2.7+4.5−3.1−2.7 MeV/c2, where the uncertainties are statistical and systematic, respectively. The significance of our measurement is greater than 7 standard deviations, constituting the first observation of this decay mode.	en_US
dc.language.iso	en	en_US
dc.publisher	American Physical Society	en_US
dc.subject	Physics	en_US
dc.subject	Asymmetric energy	en_US
dc.subject	Branching fractions	en_US
dc.subject	Decay mode	en_US
dc.subject	Standard deviation	en_US
dc.subject	Photon spectra	en_US
dc.title	Observation of Υ(2S)→γηb(1S) Decay	en_US
dc.type	Article	en_US
Appears in Collections:	Research Articles

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