Search for a Light CP-odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment

Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2274

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DC Field	Value	Language
dc.contributor.author	Bhardwaj, V.	-
dc.date.accessioned	2020-11-26T09:31:13Z	-
dc.date.available	2020-11-26T09:31:13Z	-
dc.date.issued	2019	-
dc.identifier.citation	Physical Review Letters, 122(1).	en_US
dc.identifier.other	https://doi.org/10.1103/PhysRevLett.122.011801	-
dc.identifier.uri	https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.011801	-
dc.identifier.uri	http://hdl.handle.net/123456789/2274	-
dc.description	Only IISERM authors are available in the record.	-
dc.description.abstract	We report on the first Belle search for a light CP-odd Higgs boson, A0, that decays into low mass dark matter, χ, in final states with a single photon and missing energy. We search for events produced via the dipion transition Υ(2S)→Υ(1S)π+π−, followed by the on-shell process Υ(1S)→γA0 with A0→χχ, or by the off-shell process Υ(1S)→γχχ. Utilizing a data sample of 157.3×106 Υ(2S) decays, we find no evidence for a signal. We set limits on the branching fractions of such processes in the mass ranges MA0<8.97 GeV/c2 and Mχ<4.44 GeV/c2. We then use the limits on the off-shell process to set competitive limits on WIMP-nucleon scattering in the WIMP mass range below 5 GeV/c2.	en_US
dc.language.iso	en	en_US
dc.publisher	American Physical Society	en_US
dc.subject	Higgs boson	en_US
dc.subject	Energy	en_US
dc.subject	WIMP	en_US
dc.title	Search for a Light CP-odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment	en_US
dc.type	Article	en_US
Appears in Collections:	Research Articles

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