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초록
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.
키워드
- 제목
- Search for a Light Higgs Boson in Single-Photon Decays of Υ(1<i>S</i>) Using (SIC)(2<i>S</i>) → π<SUP>+</SUP> π<SUP>-</SUP> Υ(1<i>S</i>) Tagging Method
- 저자
- Jia, S.; Shen, C. P.; Adachi, I; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhardwaj, V; Bhuyan, B.; Bilka, T.; Bobrov, A.; Bodrov, D.; Bonvicini, G.; Borah, J.; Bracko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Cervenkov, D.; Chang, M-C; Chang, P.; Chekelian, V; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Cho, S-J; Choi, S-K; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Das, S.; Dash, N.; De Nardo, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dolezal, Z.; Dong, T., V; Epifanov, D.; Ferber, T.; Ferlewicz, D.; Fulsom, B. G.; Garg, R.; Gaur, V; Gabyshev, N.; Giri, A.; Goldenzweig, P.; Golob, B.; Graziani, E.; Guan, Y.; Gudkova, K.; Hadjivasiliou, C.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Hou, W-S; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jang, E-J; Jin, Y.; Joo, K. K.; Kahn, J.; Kaliyar, A. B.; Kang, K. H.; Kawasaki, T.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K-H; Kim, Y-K; Kinoshita, K.; Kodys, P.; Kohani, S.; Konno, T.; Korobov, A.; Korpar, S.; Kovalenko, E.; Krizan, P.; Kroeger, R.; Krokovny, P.; Kumar, M.; Kumar, R.; Kumara, K.; Kwon, Y-J; Lam, T.; Laurenza, M.; Lee, S. C.; Li, J.; Li, L. K.; Li, Y.; Li, Y. B.; Li Gioi, L.; Libby, J.; Lieret, K.; Liventsev, D.; Martini, A.; Masuda, M.; Matsuda, T.; Matvienko, D.; Maurya, S. K.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Mussa, R.; Nakao, M.; Narwal, D.; Natkaniec, Z.; Natochii, A.; Nayak, L.; Nisar, N. K.; Nishida, S.; Nishimura, K.; Ogawa, K.; Ogawa, S.; Ono, H.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pang, T.; Pardi, S.; Park, S-H; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Roehrken, M.; Rostomyan, A.; Rout, N.; Russo, G.; Sahoo, D.; Sandilya, S.; Sangal, A.; Santelj, L.; Sanuki, T.; Savinov, V; Schnell, G.; Schueler, J.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Sharma, C.; Shebalin, V; Shiu, J-G; Shwartz, B.; Singh, J. B.; Sokolov, A.; Solovieva, E.; Stanic, S.; Staric, M.; Stottler, Z. S.; Sumihama, M.; Sumisawa, K.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, K.; Uno, S.; Urquijo, P.; Vahsen, S. E.; Van Tonder, R.; Varner, G.; Vinokurova, A.; Waheed, E.; Wang, D.; Wang, E.; Wang, M-Z; Watanuki, S.; Won, E.; Yabsley, B. D.; Yan, W.; Yang, S. B.; Ye, H.; Yelton, J.; Yin, J. H.; Yusa, Y.; Zhai, Y.; Zhang, Z. P.; Zhilich, V; Zhukova, V
- 발행일
- 2022-02
- 유형
- Article
- 권
- 128
- 호
- 8