2022年2月23日
Search for a Light Higgs Boson in Single-Photon Decays of ϒ(1S) Using ϒ(2S) → π+π−ϒ(1S) Tagging Method
Physical Review Letters
- 巻
- 128
- 号
- 8
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/physrevlett.128.081804
- 出版者・発行元
- American Physical Society (APS)
We search for a light Higgs boson (A(0)) decaying into a tau(+)tau(-) or mu(+)mu(-) pair in the radiative decays of Upsilon(1S). The production of Upsilon(1S) mesons is tagged by Upsilon(2S) -> pi(+)pi(-)Upsilon(1S) transitions, using 158 x 10(6) Upsilon(2S) events accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant A(0) signals in the mass range from the tau(+)tau(-) or mu(+)mu(-) threshold to 9.2 GeV/c(2) are observed. We set the upper limits at 90% credibility level (C.L.) on the product branching fractions for Upsilon(1S) -> gamma A(0) and A(0) -> tau(+)tau(-) varying from 3.8 x 10(-6) to 1.5 x 10(-4). Our results represent an approximately twofold improvement on the current world best upper limits for the Upsilon(1S) -> gamma A(0) (tau(+)tau(-)) production. For A(0) -> mu(+) mu(-), the upper limits on the product branching fractions for Upsilon(1S) -> gamma A(0) and A(0) -> mu(+)mu(-) are at the same level as the world average limits, and vary from 3.1 x 10(-7) to 1.6 x 10(-5). The upper limits at 90% credibility level on the Yukawa coupling f((SIC)(1S)) and mixing angle sin theta(A0) are also given.
- リンク情報
-
- DOI
- https://doi.org/10.1103/physrevlett.128.081804
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000766949800012&DestApp=WOS_CPL
- URL
- https://link.aps.org/article/10.1103/PhysRevLett.128.081804
- URL
- http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.128.081804/fulltext
- ID情報
-
- DOI : 10.1103/physrevlett.128.081804
- ISSN : 0031-9007
- eISSN : 1079-7114
- Web of Science ID : WOS:000766949800012