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Search for an Invisible Z' in a Final State with Two Muons and Missing Energy at Belle IIopen access

Authors
Adachi, I.Adamczyk, K.Aggarwal, L.Ahmed, H.Aihara, H.Akopov, N.Aloisio, A.Ky, N. AnhAsner, D. M.Aushev, T.Aushev, V.Bae, H.Bahinipati, S.Bambade, P.Banerjee, Sw.Baudot, J.Bauer, M.Baur, A.Beaubien, A.Becker, J.Behera, P. K.Bennett, J., VBernieri, E.Bernlochner, F. U.Bertacchi, V.Bertemes, M.Bertholet, E.Bessner, M.Bettarini, S.Bhuyan, B.Bianchi, F.Bilka, T.Biswas, D.Bodrov, D.Bolz, A.Borah, J.Bozek, A.Bra, M.Branchini, P.Browder, T. E.Budano, A.Bussino, S.Campajola, M.Cao, L.Casarosa, G.Cecchi, C.Chang, M. -C.Chang, P.Cheaib, R.Cheema, P.Chekelian, V.Chen, C.Chen, Y. Q.Cheon, B. G.Chilikin, K.Chirapatpimol, K.Cho, H. -e.Cho, K.Cho, S. -j.Choi, S. -k.Choudhury, S.Cinabro, D.Corona, L.Cunliffe, S.Das, S.Dattola, F.Cruz-Burelo, E. De LaMotte, S. A. De LaDe Nardo, G.De Nuccio, M.De Pietro, G.de Sangro, R.Destefanis, M.Dey, S.De Yta-Hernandez, A.Dhamija, R.Di Canto, A.Di Capua, F.Dingfelder, J.Dole, Z.Jimenez, I. DominguezV. Dong, T.Dorigo, M.Dort, K.Dossett, D.Dreyer, S.Dubey, S.Dujany, G.Ecker, P.Eliachevitch, M.Epifanov, D.Feichtinger, P.Ferber, T.Ferlewicz, D.Fillinger, T.Finck, C.Finocchiaro, G.Fodor, A.Forti, F.Fulsom, B. G.Ganiev, E.Garcia-Hernandez, M.Gaur, V.Gaz, A.Gellrich, A.Ghevondyan, G.Giordano, R.Giri, A.Glazov, A.Gobbo, B.Godang, R.Goldenzweig, P.Granderath, S.Graziani, E.Greenwald, D.Gruberova, Z.Gu, T.Gudkova, K.Guilliams, J.Haigh, H.Hara, T.Hayasaka, K.Hayashii, H.Hazra, S.Hearty, C.Cruz, I. Heredia de laVillanueva, M. HernandezHershenhorn, A.Higuchi, T.Hill, E. C.Hohmann, M.Hsu, C. -l.Iijima, T.Inami, K.Inguglia, G.Ipsita, N.Ishikawa, A.Ito, S.Itoh, R.Iwasaki, M.Jackson, P.Jacobs, W. W.Jaffe, D. E.Jang, E. -j.Ji, Q. P.Jia, S.Jin, Y.Joo, K. K.Junkerkalefeld, H.Kakuno, H.Kaliyar, A. B.Kang, K. H.Kang, S.Karl, R.Karyan, G.Kiesling, C.Kim, C. -h.Kim, D. Y.Kim, K. -h.Kim, Y. -k.Kindo, H.Kinoshita, K.Kody, P.Koga, T.Kohani, S.Kojima, K.Konno, T.Korobov, A.Korpar, S.Kovalenko, E.Kowalewski, R.Kraetzschmar, T. M. G.Kri, P.Krokovny, P.Kuhr, T.Kumar, J.Kumara, K.Kunigo, T.Kuzmin, A.Kwon, Y. -j.Lacaprara, S.Lam, T.Lanceri, L.Lange, J. S.Laurenza, M.Lautenbach, K.Leboucher, R.Diberder, F. R. LeLeitl, P.Li, C.Li, L. K.Libby, J.Lieret, K.Liptak, Z.Liu, Q. Y.Liventsev, D.Longo, S.Lozar, A.Lueck, T.Luo, T.Lyu, C.Maggiora, M.Maiti, R.Maity, S.Manfredi, R.Manoni, E.Marcello, S.Marinas, C.Martel, L.Martini, A.Martinov, T.Massaccesi, L.Masuda, M.Matsuoka, K.Matvienko, D.Maurya, S. K.McKenna, J. A.Meier, F.Merola, M.Metzner, F.Milesi, M.Miller, C.Miyabayashi, K.Mizuk, R.Mohanty, G. B.Molina-Gonzalez, N.Moneta, S.Moser, H. -g.Mrvar, M.Mussa, R.Nakamura, I.Nakamura, K. R.Nakao, M.Nakayama, H.Nakazawa, Y.Charan, A. NarimaniNaruki, M.Natkaniec, Z.Natochii, A.Nayak, L.Nayak, M.Nazaryan, G.Nisar, N. K.Nishida, S.Ogawa, S.Ono, H.Onuki, Y.Oskin, P.Pakhlov, P.Pakhlova, G.Paladino, A.Panta, A.Paoloni, E.Pardi, S.Parham, K.Park, H.Park, S. -h.Paschen, B.Passeri, A.Patra, S.Paul, S.Pedlar, T. K.Peruzzi, I.Peschke, R.Pestotnik, R.Piccolo, M.Piilonen, L. E.Angioni, G. PinnaPodesta-Lerma, P. L. M.Podobnik, T.Pokharel, S.Polat, L.Praz, C.Prell, S.Prencipe, E.Prim, M. T.Purwar, H.Rad, N.Rados, P.Raeuber, G.Raiz, S.Morales, A. RamirezReif, M.Reiter, S.Remnev, M.Ripp-Baudot, I.Rizzo, G.Robertson, S. H.Perez, D. RodriguezRoney, J. M.Rostomyan, A.Rout, N.Russo, G.Sanders, D. A.Sandilya, S.Sangal, A.Santelj, L.Sato, Y.Savinov, V.Scavino, B.Schueler, J.Schwanda, C.Seino, Y.Selce, A.Senyo, K.Serrano, J.Sevior, M. E.Sfienti, C.Shen, C. P.Shillington, T.Shiu, J. -g.Sibidanov, A.Simon, F.Singh, J. B.Skorupa, J.Sobie, R. J.Soffer, A.Sokolov, A.Solovieva, E.Spataro, S.Spruck, B.Stari, M.Stefkova, S.Stottler, Z. S.Stroili, R.Strube, J.Sue, Y.Sumihama, M.Sumisawa, K.Sutcliffe, W.Suzuki, S. Y.Svidras, H.Takizawa, M.Tamponi, U.Tanida, K.Tanigawa, H.Taniguchi, N.Tenchini, F.Thaller, A.Tiwary, R.Tonelli, D.Torassa, E.Toutounji, N.Trabelsi, K.Uchida, M.Ueda, I.Uematsu, Y.Uglov, T.Unger, K.Unno, Y.Uno, K.Uno, S.Ushiroda, Y.Vahsen, S. E.van Tonder, R.Varvell, K. E.Vinokurova, A.Vitale, L.Vobbilisetti, V.Wakeling, H. M.Wang, E.Wang, M. -Z.Wang, X. L.Warburton, A.Watanabe, M.Watanuki, S.Welsch, M.Yoshihara, K.Yuan, C. Z.Yusa, Y.Zani, L.Zhang, Y.Zhilich, V.Zhou, Q. D.Zhou, X. Y.Zhukova, V. I.Zlebcik, R.Belle II Collaboration
Issue Date
Jun-2023
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.130, no.23
Journal Title
PHYSICAL REVIEW LETTERS
Volume
130
Number
23
URI
https://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/49504
DOI
10.1103/PhysRevLett.130.231801
ISSN
0031-9007
1079-7114
Abstract
The L & mu; - L & tau; extension of the standard model predicts the existence of a lepton-flavor-universality -violating Z0 boson that couples only to the heavier lepton families. We search for such a Z0 through its invisible decay in the process e thorn e- & RARR; & mu; thorn & mu;-Z0. We use a sample of electron-positron collisions at a center -of-mass energy of 10.58 GeV collected by the Belle II experiment in 2019-2020, corresponding to an integrated luminosity of 79.7 fb-1. We find no excess over the expected standard-model background. We set 90%-confidence-level upper limits on the cross section for this process as well as on the coupling of the model, which ranges from 3 x 10-3 at low Z0 masses to 1 at Z0 masses of 8 GeV/c2.
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