Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ− and Missing Energy Final States with the Belle II Experiment
F. Abudinén,I. Adachi,L. Aggarwal,H. Aihara,Н. Акопов,A. Aloisio,N. Anh Ky,D. M. Asner,H. Atmacan,T. Aushev,V. Aushev,V. Babu,S. Bahinipati,P. Bambade,S. Banerjee,S. Bansal,J. Baudot,A. Baur,A. Beaubien,J. Becker,P. K. Behera,J. V. Bennett,E. Bernieri,F. U. Bernlochner,M. Bertemes,E. Bertholet,M. Bessner,B. Bhuyan,F. Bianchi,T. Bilka,D. Biswas,A. Bobrov,D. Bodrov,A. E. Bolz,A. Bożek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,S. Bussino,M. Campajola,G. Casarosa,C. Cecchi,V. Chekelian,C. H. Chen,Y. Q. Chen,B. G. Cheon,K. Chilikin,K. Chirapatpimol,H. E. Cho,Kihyeon Cho,S.-J. Cho,S. K. Choi,S. Choudhury,D. Cinabro,L. Corona,S. Cunliffe,F. Dattola,G. de Marino,G. De Nardo,M. De Nuccio,G. De Pietro,R. de Sangro,M. Destefanis,S. Dey,A. De Yta-Hernandez,R. Dhamija,A. Di Canto,F. Di Capua,J. Dingfelder,Z. Doležal,I. Domínguez Jiménez,T. V. Dong,M. Dorigo,K. Dort,D. Dossett,S. Dreyer,S. Dubey,G. Dujany,M. Eliachevitch,D. Epifanov,P. Feichtinger,T. Ferber,D. Ferlewicz,T. Fillinger,C. Finck,G. Finocchiaro,K. T. Flood,A. Fodor,F. Forti,A. Frey,B. G. Fulsom,E. Ganiev,M. Garcia-Hernández,V. Gaur,A. Gaz,A. Gellrich,R. Giordano,A. Giri,B. Gobbo,R. Godang,P. Goldenzweig,W. Gradl,S. Granderath,E. Graziani,D. Greenwald,T. Gu,K. Gudkova,J. Guilliams,C. Hadjivasiliou,K. Hara,T. Hara,K. Hayasaka,H. Hayashii,S. Hazra,C. Hearty,M. T. Hedges,I. Heredia-De La Cruz,M. Hernández Villanueva,A. D. Hershenhorn,Y.-T. Lai,E. Hill,M. Hoek,M. Hohmann,C.-L. Hsu,T. Iijima,K. Inami,G. Inguglia,N. Ipsita,A. Ishikawa,S. Ito,R. Itoh,M. Iwasaki,P. Jackson,W. W. Jacobs,D. E. Jaffe,E.-J. Jang,Q. Ji,S. Jia,Y. Jin,H. Junkerkalefeld,H. Kakuno,A. B. Kaliyar,J. Kandra,K. H. Kang,Robert Karl,G. Karyan,T. Kawasaki,C. Ketter,H. Kichimi,C. Kiesling,C. H. Kim,D. Y. Kim,K.-H. Kim,Y.-K. Kim,K. Kinoshita,P. Kodyš,T. Koga,S. Kohani,K. Kojima,T. Konno,A. Korobov,S. Korpar,E. Kovalenko,R. Kowalewski,T. M. G. Kraetzschmar,P. Križan,P. Krokovny,T. Kuhr,Rajeev Kumar,K. Kumara,T. Kunigo,Y. J. Kwon,S. Lacaprara,Y.-T. Lai,T. Lam,J. S. Lange,M. Laurenza,R. Leboucher,Seungcheol Lee,L. K. Li,Y. B. Li,J. Libby,K. Lieret,Q. Y. Liu,D. Liventsev,S. Longo,A. Lozar,T. Lueck,C. Lyu,M. Maggiora,R. Maiti,S. Maity,R. Manfredi,E. Manoni,S. Marcello,C. Mariñas,L. Martel,A. Martini,L. Massaccesi,M. Masuda,K. Matsuoka,J. A. McKenna,F. Meier,M. Merola,F. Metzner,M. Milesi,C. Miller,K. Miyabayashi,G. B. Mohanty,N. Molina-Gonzalez,S. Moneta,H. K. Moon,M. Mrvar,I. Nakamura,K. R. Nakamura,M. Nakao,Hiroyuki Nakayama,A. Narimani Charan,M. Naruki,Z. Natkaniec,A. Natochii,L. Nayak,M. Nayak,N. K. Nisar,S. Nishida,K. Nishimura,S. Ogawa,H. Ono,P. Oskin,G. Pakhlova,A. Paladino,A. Panta,S. Pardi,K. Parham,H. Park,S.-H. Park,A. Passeri,S. Patra,S. Paul,T. K. Pedlar,M. Piccolo,L. E. Piilonen,G. Pinna Angioni,P. L.M. Podesta-Lerma,T. Podobnik,S. Pokharel,L. Polat,C. Praz,S. Prell,E. Prencipe,M. T. Prim,Harsh Purwar,N. Rad,P. Rados,S. Raiz,A. Ramirez Morales,M. Reif,S. Reiter,M. Remnev,I. Ripp-Baudot,G. Rizzo,S. H. Robertson,D. Rodríguez Pérez,J. M. Roney,A. Rostomyan,N. Rout,Deepak Kumar Sahoo,D. A. Sanders,S. Sandilya,L. Šantelj,Y. Sato,B. Scavino,J. Schueler,C. Schwanda,Y. Seino,A. Selce,K. Senyo,J. Serrano,M. E. Sevior,C. Sfienti,T. Shillington,J. G. Shiu,A. Sibidanov,F. Simon,J. B. Singh,J. Skorupa,A. Soffer,A. Sokolov,E. Solovieva,S. Spataro,B. Spruck,M. Starič,S. Stefkova,Z. S. Stottler,R. Stroili,M. Sumihama,K. Sumisawa,W. Sutcliffe,Shoji Suzuki,H. Svidras,M. Tabata,M. Takizawa,U. Tamponi,S. Tanaka,K. Tanida,H. Tanigawa,F. Tenchini,R. Tiwary,D. Tonelli,E. Torassa,N. Toutounji,K. Trabelsi,M. Uchida,I. Ueda,Y. Uematsu,T. Uglov,K. Unger,Y. Unno,K. Uno,S. Uno,Y. Ushiroda,S. Vahsen,R. Van Tonder,G. Varner,K. E. Varvell,A. Vinokurova,L. Vitale,V. Vobbilisetti,E. Waheed,H. M. Wakeling,E. Wang,M.-Z. Wang,A. Warburton,M. Watanabe,S. Watanuki,M. Welsch,C. Wessel,H. Windel,E. Won,X. P. Xu,B. Yabsley,S. Yamada,W. B. Yan,S. B. Yang,H. Ye,J. H. Yin,K. Yoshihara,C. Z. Yuan,Y. Yusa,L. Zani,Y. Zhang,V. Zhilich,Q. Zhou,Xingyu Zhou,V. Zhukova,R. Žlebčík
Physical Review Letters（2023）
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摘要
The dark photon A^{'} and the dark Higgs boson h^{'} are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A^{'} and h^{'} in the dark Higgsstrahlung process e^{+}e^{-}→A^{'}h^{'} with A^{'}→μ^{+}μ^{-} and h^{'} invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb^{-1}, we observe no evidence for signal. We obtain exclusion limits at 90% Bayesian credibility in the range of 1.7-5.0 fb on the cross section and in the range of 1.7×10^{-8}-200×10^{-8} on the effective coupling ϵ^{2}×α_{D} for the A^{'} mass in the range of 4.0 GeV/c^{2}更多
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关键词
invisible dark higgs boson,dark photon,missing energy final states
