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Search for an Invisibly Decaying Z ' Boson at Belle II in e(+)e(-) -> mu(+)mu(-) (e(+/-)mu(-/+)) Plus Missing Energy Final States

Authors
Adachi, IAhlburg, P.Aihara, H.Akopov, N.Aloisio, A.Ky, N. AnhAsper, D. M.Atmacan, H.Aushev, T.Aushev, VAziz, T.Babu, VBaehr, S.Bambade, P.Banerjee, SwBansal, VBarrett, M.Baudot, J.Becker, J.Behera, P. K.Bennett, J., VBernieri, E.Bernlochner, F. U.Bertemes, M.Bessner, M.Bettarini, S.Bianchi, F.Biswas, D.Bozek, A.Bracko, M.Branchini, P.Briere, R. A.Browder, T. E.Budano, A.Burmistrov, L.Bussino, S.Campajola, M.Cao, L.Casarosa, G.Cecchi, C.Cervenkov, D.Chang, M-CCheaib, R.Chekelian, VChen, Y. Q.Chen, Y-TCheon, B. G.Chilikin, K.Cho, K.Cho, S.Choi, S-KChoudhury, S.Cinabro, D.Corona, L.Cremaldi, L. M.Cunliffe, S.Czank, T.Dattola, F.De La Cruz-Burelo, E.De Nardo, G.De Nuccio, M.De Pietro, G.de Sangro, R.Destefanis, M.Dey, S.De Yta-Hernandez, A.Di Capua, F.Dolezal, Z.Jimenez, I. DominguezDong, T., VDort, K.Dossett, D.Dubey, S.Duell, S.Dujany, G.Eidelman, S.Eliachevitch, M.Fast, J. E.Ferber, T.Ferlewicz, D.Finocchiaro, G.Fiore, S.Fodor, A.Forti, F.Fulsom, B. G.Ganiev, E.Garcia-Hernandez, M.Garg, R.Gaur, VGaz, A.Gellrich, A.Gemmler, J.Gessler, T.Giordano, R.Giri, A.Gobbo, B.Godang, R.Goldenzweig, P.Golob, B.Gomis, P.Gradl, W.Graziani, E.Greenwald, D.Guan, Y.Hadjivasiliou, C.Halder, S.Hara, T.Hartbrich, O.Hayasaka, K.Hayashii, H.Hearty, C.Hedges, M. T.Heredia de la Cruz, IVillanueva, M. HernandezHershenhorn, A.Higuchi, T.Hill, E. C.Hoek, M.Hsu, C-LHu, Y.Iijima, T.Inami, K.Inguglia, G.Jabbar, J. IrakkathilIshikawa, A.Itoh, R.Iwasaki, Y.Jacobs, W. W.Jaffe, D. E.Jang, E-JJeon, H. B.Jia, S.Jin, Y.Joo, C.Joo, K. K.Kahn, J.Kakuno, H.Kaliyar, A. B.Kandra, J.Karyan, G.Kato, Y.Kawasaki, T.Kim, B. H.Kim, C-HKim, D. Y.Kim, K-HKim, S-HKim, Y. K.Kim, Y.Kimmel, T. D.Kindo, H.Kleinwort, C.Kodys, P.Koga, T.Kohani, S.Komarov, IKorpar, S.Kovalchuk, N.Kraetzschmar, T. M. G.Krizan, P.Kroeger, R.Krokovny, P.Kuhr, T.Kumar, J.Kumar, M.Kumar, R.Kumara, K.Kurz, S.Kuzmin, A.Kwon, Y-JLacaprara, S.La Licata, C.Lanceri, L.Lange, J. S.Lautenbach, K.Lee, I-SLee, S. C.Leitl, P.Levit, D.Li, L. K.Li, Y. B.Libby, J.Lieret, K.Li Gioi, L.Liptak, Z.Liu, Q. Y.Liventsev, D.Longo, S.Luo, T.Maeda, Y.Maggiora, M.Manoni, E.Marcello, S.Marinas, C.Martini, A.Masuda, M.Matsuda, T.Matsuoka, K.Matvienko, D.Meggendorfer, F.Mei, J. C.Meier, F.Merola, M.Metzner, F.Milesi, M.Miller, C.Miyabayashi, K.Miyake, H.Mizuk, R.Azmi, K.Mohanty, G. B.Moon, T.Morii, T.Moser, H-GMueller, F.Mueller, F. J.Muller, ThMuroyama, G.Mussa, R.Nakano, E.Nakao, M.Nayak, M.Nazaryan, G.Neverov, D.Niebuhr, C.Nisar, N. K.Nishida, S.Nishimura, K.Nishimura, M.Oberhof, B.Ogawa, K.Onishchuk, Y.Ono, H.Onuki, Y.Oskin, P.Ozaki, H.Pakhlov, P.Pakhlova, G.Paladino, A.Panta, A.Paoloni, E.Park, H.Paschen, B.Passeri, A.Pathak, A.Paul, S.Pedlar, T. K.Peruzzi, IPeschke, R.Pestotnik, R.Piccolo, M.Piilonen, L. E.Popov, VPraz, C.Prencipe, E.Prim, M. T.Purohit, M., VRados, P.Rasheed, R.Reiter, S.Remnev, M.Resmi, P. K.Ripp-Baudot, IRitter, M.Rizzo, G.Rizzuto, L. B.Robertson, S. H.Perez, D. RodriguezRoney, J. M.Rosenfeld, C.Rostomyan, A.Rout, N.Russo, G.Sahoo, D.Sakai, Y.Sandilya, S.Sangal, A.Santelj, L.Sartori, P.Sato, Y.Savinov, VScavino, B.Schueler, J.Schwanda, C.Seddon, R. M.Seino, Y.Selce, A.Senyo, K.Sfienti, C.Shen, C. P.Shiu, J-GShwartz, B.Sibidanov, A.Simon, F.Sobie, R. J.Soffer, A.Sokolov, A.Solovieva, E.Spataro, S.Spruck, B.Staric, M.Stefkova, S.Stottler, Z. S.Stroili, R.Strube, J.Sumihama, M.Sumiyoshi, T.Summers, D. J.Suzuki, S. Y.Tabata, M.Takizawa, M.Tamponi, U.Tanaka, S.Tanida, K.Taniguchi, N.Taras, P.Tenchini, F.Torassa, E.Trabelsi, K.Tsuboyama, T.Uchida, M.Unger, K.Unno, Y.Uno, S.Ushiroda, Y.Vahsen, S. E.van Tonder, R.Varner, G. S.Varvell, K. E.Vinokurova, A.Vitale, L.Vossen, A.Wakai, M.Wakeling, H. M.Abdullah, W. WanWang, C. H.Wang, M-ZWarburton, A.Watanabe, M.Webb, J.Wehle, S.Wessel, C.Wiechczynski, J.Windel, H.Won, E.Yabsley, B.Yamada, S.Yan, W.Yang, S. B.Ye, H.Yin, J. H.Yonenaga, M.Yuan, C. Z.Yusa, Y.Zani, L.Zhang, Z.Zhilich, VZhou, Q. D.Zhou, X. Y.Zhukova, V., I
Issue Date
6-Apr-2020
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.124, no.14
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW LETTERS
Volume
124
Number
14
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/56650
DOI
10.1103/PhysRevLett.124.141801
ISSN
0031-9007
Abstract
Theories beyond the standard model often predict the existence of an additional neutral boson, the Z'. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z' in the process e(+)e(-) -> mu(+)mu(-) Z' and of a lepton-flavor-violating Z' in e(+) e(-) -> e(+/-)mu(-/+)Z'. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an L-mu - L-tau theory, into upper limits on the Z' coupling constant at the level of 5 x 10(-2) - 1 for M-z' <= 6 GeV/c(2).
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