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

Дата
2022
Авторы
Jia, S.
Shen, C. P.
Adachi, I.
Aihara, H.
Pakhlov, P.
Journal Title
Journal ISSN
Volume Title
Издатель
Научные группы
Логотип проекта
Научная группа
Belle Collaboration
Организационные подразделения
OrgUnit Logo
Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
© 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.
Описание
Ключевые слова
Цитирование
Search 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
URI
https://www.doi.org/10.1103/PhysRevLett.128.081804
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85126389684&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000766949800012
 https://openrepository.mephi.ru/handle/123456789/28834
Коллекции
Публикации