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Search for a Light Higgs Boson in Single-Photon Decays of ϒ (1S) Using ϒ (2S) →π+π- ϒ (1S) Tagging Method

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dc.contributor.authorJia, S.
dc.contributor.authorShen, C. P.
dc.contributor.authorAdachi, I.
dc.contributor.authorAihara, H.
dc.contributor.authorPakhlov, P.
dc.date.accessioned2024-12-26T09:27:40Z
dc.date.available2024-12-26T09:27:40Z
dc.date.issued2022
dc.description.abstract© 2022 authors. Published by the American Physical Society.We search for a light Higgs boson (A0) decaying into a τ+τ- or μ+μ- pair in the radiative decays of ϒ(1S). The production of ϒ(1S) mesons is tagged by ϒ(2S)→π+π-ϒ(1S) transitions, using 158×106 ϒ(2S) events accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant A0 signals in the mass range from the τ+τ- or μ+μ- threshold to 9.2 GeV/c2 are observed. We set the upper limits at 90% credibility level (C.L.) on the product branching fractions for ϒ(1S)→γA0 and A0→τ+τ- varying from 3.8×10-6 to 1.5×10-4. Our results represent an approximately twofold improvement on the current world best upper limits for the ϒ(1S)→γA0(→τ+τ-) production. For A0→μ+μ-, the upper limits on the product branching fractions for ϒ(1S)→γA0 and A0→μ+μ- are at the same level as the world average limits, and vary from 3.1×10-7 to 1.6×10-5. The upper limits at 90% credibility level on the Yukawa coupling fϒ(1S) and mixing angle sinθA0 are also given.
dc.identifier.citationSearch for a Light Higgs Boson in Single-Photon Decays of ϒ (1S) Using ϒ (2S) →π+π- ϒ (1S) Tagging Method / Jia, S. [et al.] // Physical Review Letters. - 2022. - 128. - № 8. - 10.1103/PhysRevLett.128.081804
dc.identifier.doi10.1103/PhysRevLett.128.081804
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevLett.128.081804
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85126389684&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000766949800012
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/28834
dc.relation.ispartofPhysical Review Letters
dc.titleSearch for a Light Higgs Boson in Single-Photon Decays of ϒ (1S) Using ϒ (2S) →π+π- ϒ (1S) Tagging Method
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue8
oaire.citation.volume128
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