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.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, Leo 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.2024-01-222024-01-222022-02-230031-9007https://hdl.handle.net/10919/117469We 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.9 page(s)application/pdfenCreative Commons Attribution 4.0 InternationalPhysicsBelle CollaborationArticle - Refereedhttps://doi.org/10.1103/PhysRevLett.128.0818041288Piilonen, Leo [0000-0001-6836-0748]352756791079-7114