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Cinabro, D. Ferlewicz, D. Liventsev, D. M. Asner, D. Matvienko, D. Sahoo, D. \\v{C}ervenkov, D. Y. Kim, E.-J. Jang, E. Kovalenko, E. Prencipe, E. Solovieva, E. Wang, E. Won, F. Bernlochner, F. Di Capua, F. Metzner, F. Tenchini, G. B. Mohanty, G. Bonvicini, G. De Nardo, G. Inguglia, G. Karyan, G. Pakhlova, G. Russo, G. Schnell, G. Varner, H. Aihara, H. E. Cho, H. Hayashii, H. Kichimi, H. Ono, H. Park, H. Yamamoto, H. Ye, I. Adachi, I. Jaegle, I. Komarov, I. S. Lee, J. Bennett, J. Biswal, J.-G. Shiu, J. H. Yin, J. Libby, J. Schueler, J. S. Lange, J. Yelton, K. Adamczyk, K. Chilikin, K. Cho, K. Gudkova, K. Hayasaka, K. H. Kang, K.-H. Kim, K. Inami, K. K. Joo, K. Kumara, K. Lieret, K. Miyabayashi, K. Senyo, K. Tanida, K. Trabelsi, K. Uno, L. Cao, L. E. Piilonen, L. Li Gioi, L. Nayak, L. Santelj, M. Bessner, M. Bra\\v{c}ko, M. Campajola, M.-C. Chang, M. E. Sevior, M. Hernandez Villanueva, M. Iwasaki, M. Kumar, M. Masuda, M. Merola, M. Mrvar, M. Nakao, M. Niiyama, M. R\\\"ohrken, M. Shapkin, M. Stari\\v{c}, M. Sumihama, M. Takizawa, M. T. Hedges, M. T. Prim, M. Uchida, M.-Z. Wang, N. Dash, N. K. Nisar, N. Rout, O. Grzymkowska, O. Hartbrich, P. Behera, P. Goldenzweig, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Pakhlov, P. Urquijo, P. Wang, R. Ayad, R. Dhamija, R. Garg, R. Itoh, R. Kroeger, R. Mizuk, R. Mussa, R. Pestotnik, R. van Tonder, S. Bahinipati, S. B. Yang, S. Choudhury, S. C. Lee, S. Das, S. Eidelman, S. H. Kim, S.-H. Park, S. Jia, S. Korpar, S. Mohanty, S. Nishida, S. Pardi, S. Patra, S. Paul, S. Sandilya, S. Stani\\v{c}, S. Uehara, S. Uno, S. Watanuki, T. Aushev, T. Bilka, T. Czank, T. E. Browder, T. Ferber, T. Higuchi, T. Iijima, T. Kawasaki, T. Konno, T. K. Pedlar, T. Kuhr, T. Luo, T. Matsuda, T. Mori, T. Pang, T. Podobnik, T. Sanuki, T. Sumiyoshi, T. Uglov, T. V. Dong, V. Babu, V. Bhardwaj, V. Gaur, V. Popov, V. Savinov, V. Shebalin, V. Zhilich, V. Zhukova, V. Zhulanov (for the Belle collaboration), W.-S. Hou, W. Sutcliffe, W. W. Jacobs, W. 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Higuchi, T. Iijima, T. Kawasaki, T. Konno, T. K. Pedlar, T. Kuhr, T. Luo, T. Matsuda, T. Mori, T. Pang, T. Podobnik, T. Sanuki, T. Sumiyoshi, T. Uglov, T. V. Dong, V. Babu, V. Bhardwaj, V. Gaur, V. Popov, V. Savinov, V. Shebalin, V. Zhilich, V. Zhukova, V. Zhulanov (for the Belle collaboration), W.-S. Hou, W. Sutcliffe, W. W. Jacobs, W. Yan, X. Xu, Y. B. Li, Y. Choi, Y. Guan, Y. Iwasaki, Y. Jin, Y.-J. Kwon, Y.-K. Kim, Y. Onuki, Y. Seino, Y. Tao, Y.-T. Lai, Y. Yusa, Z. Dole\\v{z}al, Z. Natkaniec, Z. P. Zhang, Z. S. Stottler","submitted_at":"2021-09-17T15:20:53Z","abstract_excerpt":"We search for a new gauge boson $Z'$ that couples only to heavy leptons and their corresponding neutrinos in the process $e^{+} e^{-} \\rightarrow Z'(\\rightarrow \\mu^{+}\\mu^{-}) \\mu^{+}\\mu^{-}$, using a 643 fb$^{-1}$ data sample collected by the Belle experiment at or near the $\\Upsilon(1S,2S,3S,4S,5S)$ resonances at the KEKB collider. 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