Publication: Search for a Light CP -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment
Дата
2019
Авторы
Seong, I. S.
Vahsen, S. E.
Adachi, I.
Aihara, H.
Mizuk, R.
Pakhlov, P.
Zhukova, V.
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Аннотация
© 2019 authors. Published by the American Physical Society. 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 (2S)→ (1S)π+π-, followed by the on-shell process (1S)→γA0 with A0→χχ, or by the off-shell process (1S)→γχχ. Utilizing a data sample of 157.3×106 (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.
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Цитирование
Search for a Light CP -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment / Seong, I.S. [et al.] // Physical Review Letters. - 2019. - 122. - № 1. - 10.1103/PhysRevLett.122.011801
URI
https://www.doi.org/10.1103/PhysRevLett.122.011801
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https://openrepository.mephi.ru/handle/123456789/16452
https://www.scopus.com/record/display.uri?eid=2-s2.0-85059832635&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000455065000002
https://openrepository.mephi.ru/handle/123456789/16452