Search for a Light CP -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment

Seong, I. S.; Vahsen, S. E.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bakich, A. M.; Bansal, V.; Behera, P.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswal, J.; Bobrov, A.; Bonvicini, G.; Bozek, A.; Bračko, M.; Browder, T. E.; Cao, L.; Červenkov, D.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Dash, N.; Di Carlo, S.; Dingfelder, J.; Dong, T. V.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Frey, A.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gelb, M.; Giri, A.; Goldenzweig, P.; Golob, B.; Guido, E.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Higuchi, T.; Hou, W. -S.; Hsu, C. -L.; Huang, K.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jeon, H. B.; Jia, S.; Jin, Y.; Joffe, D.; Joo, K. K.; Julius, T.; Kaliyar, A. B.; Karyan, G.; Kawasaki, T.; Kichimi, H.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, K. T.; Kim, S. H.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y. -J.; Lange, J. S.; Lee, I. S.; Lee, S. C.; Li, L. K.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; MacQueen, C.; Masuda, M.; Matsuda, T.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mori, T.; Mussa, R.; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Nayak, M.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Nishimura, K.; Ogawa, S.; Ono, H.; Ostrowicz, W.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Park, H.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Prencipe, E.; Ritter, M.; Rostomyan, A.; Russo, G.; Sakai, Y.; Salehi, M.; Sandilya, S.; Santelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schueler, J.; Schwanda, C.; Seino, Y.; Senyo, K.; Seon, O.; Sevior, M. E.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Simon, F.; Solovieva, E.; Stanič, S.; Starič, M.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Usov, Y.; Van Hulse, C.; Van Tonder, R.; Varner, G.; Vinokurova, A.; Vossen, A.; Wang, B.; Wang, C. H.; Wang, P.; Watanabe, M.; Watanuki, S.; Widmann, E.; Won, E.; Yamamoto, H.; Ye, H.; Yelton, J.; Yuan, C. Z.; Yusa, Y.; Zakharov, S.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.; Zupanc, A.

doi:10.1103/PhysRevLett.122.011801

Title: Search for a Light $C P$ -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment

Journal Article · 04 January 2019 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.122.011801 · OSTI ID:1489714

Seong, I. S.; Vahsen, S. E.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bakich, A. M.; Bansal, V.; Behera, P.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswal, J.; Bobrov, A.; Bonvicini, G.; Bozek, A. more »

Here, we report on the first Belle search for a light CP-odd Higgs boson, A⁰, that decays into low mass dark matter, χ, in final states with a single photon and missing energy. We search for events produced via the dipion transition Υ(2S)→Υ(1S)π⁺π^-, followed by the on-shell process Υ(1S)→γA⁰ with A⁰→χχ, or by the off-shell process Υ(1S)→γχχ. Utilizing a data sample of 157.3×10⁶ Υ(2S) decays, we find no evidence for a signal. We set limits on the branching fractions of such processes in the mass ranges M_A0 <8.97 GeV/c² and Mχ<4.44 GeV/c². We then use the limits on the off-shell process to set competitive limits on WIMP-nucleon scattering in the WIMP mass range below 5 GeV/c².

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Research Organization:: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Univ. of Hawaii, Honolulu, HI (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); KEK - High Energy Accelerator Research Organization; Ministry of Education, Culture, Sports, Science and Technology

Contributing Organization:: Belle Collaboration

Grant/Contract Number:: SC0009973; SC0010504; SC0012704

OSTI ID:: 1489714

Alternate ID(s):: OSTI ID: 1492792; OSTI ID: 1593821

Report Number(s):: BNL-210921-2019-JAAM; PRLTAO

Journal Information:: Physical Review Letters, Vol. 122, Issue 1; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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