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.; Bra?ko M.; Browder T.E.; Cao L.; ?ervenkov 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.; Kody� P.; Korpar S.; Kotchetkov D.; Kri�an 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.; Stani? S.; Stari? 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.; (Belle Collaboration)

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

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2019

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We report on the first Belle search for a light CP-odd Higgs boson, A0, that decays into low mass dark matter, ?, in final states with a single photon and missing energy. We search for events produced via the dipion transition (2S)? (1S)?+?-, followed by the on-shell process (1S)??A0 with A0???, or by the off-shell process (1S)????. Utilizing a data sample of 157.3�106 (2S) decays, we find no evidence for a signal. We set limits on the branching fractions of such processes in the mass ranges MA0<8.97 GeV/c2 and M?<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. � 2019 authors. Published by the American Physical Society.

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http://dx.doi.org/10.1103/PhysRevLett.122.011801
https://idr.iitbbs.ac.in/handle/2008/2362

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

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