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Adachi I, Ahlburg P, Aihara H, et al. Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States. Phys Rev Lett. 2020;124(14):141801doi: 10.1103/PhysRevLett.124.141801.
Adachi, I., Ahlburg, P., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D. M., Atmacan, H., Aushev, T., Aushev, V., Aziz, T., Babu, V., Baehr, S., Bambade, P., Banerjee, S., Bansal, V., Barrett, M., Baudot, J., Becker, J., Behera, P. K., Bennett, J. V., Bernieri, E., Bernlochner, F. U., Bertemes, M., Bessner, M., Bettarini, S., Bianchi, F., Biswas, D., Bozek, A., Bračko, M., Branchini, P., Briere, R. A., Browder, T. E., Budano, A., Burmistrov, L., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Červenkov, D., Chang, M. C., Cheaib, R., Chekelian, V., Chen, Y. Q., Chen, Y. T., Cheon, B. G., Chilikin, K., Cho, K., Cho, S., Choi, S. K., Choudhury, 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., Doležal, Z., Domínguez Jiménez, I., Dong, T. V., Dort, 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, V., Gaz, 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, I., Hernández Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E. C., Hoek, M., Hsu, C. L., Hu, Y., Iijima, T., Inami, K., Inguglia, G., Irakkathil Jabbar, J., Ishikawa, A., Itoh, R., Iwasaki, Y., Jacobs, W. W., Jaffe, D. E., Jang, E. J., Jeon, 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. H., Kim, D. Y., Kim, K. H., Kim, S. H., Kim, Y. K., Kim, Y., Kimmel, T. D., Kindo, H., Kleinwort, C., Kodyš, P., Koga, T., Kohani, S., Komarov, I., Korpar, S., Kovalchuk, N., Kraetzschmar, T. M. G., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kumar, J., Kumar, M., Kumar, R., Kumara, K., Kurz, S., Kuzmin, A., Kwon, Y. J., Lacaprara, S., La Licata, C., Lanceri, L., Lange, J. S., Lautenbach, K., Lee, I. S., Lee, 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. G., Mueller, F., Müller, F. J., Muller, T., Muroyama, 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, I., Peschke, R., Pestotnik, R., Piccolo, M., Piilonen, L. E., Popov, V., Praz, C., Prencipe, E., Prim, M. T., Purohit, M. V., Rados, P., Rasheed, R., Reiter, S., Remnev, M., Resmi, P. K., Ripp-Baudot, I., Ritter, M., Rizzo, G., Rizzuto, L. B., Robertson, S. H., Rodríguez Pérez, D., Roney, 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, V., Scavino, B., Schueler, J., Schwanda, C., Seddon, R. M., Seino, Y., Selce, A., Senyo, K., Sfienti, C., Shen, C. P., Shiu, J. G., Shwartz, B., Sibidanov, A., Simon, F., Sobie, R. J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Starič, 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., Wan Abdullah, W., Wang, C. H., Wang, M. Z., Warburton, 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, V., Zhou, Q. D., Zhou, X. Y., Zhukova, V. I. (2020). Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States. Physical review letters, 124(14), 141801. https://doi.org/10.1103/PhysRevLett.124.141801
Adachi, I, et al. "Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States." Physical review letters vol. 124,14 (2020): 141801. doi: https://doi.org/10.1103/PhysRevLett.124.141801
Adachi I, Ahlburg P, Aihara H, Akopov N, Aloisio A, Anh Ky N, Asner DM, Atmacan H, Aushev T, Aushev V, Aziz T, Babu V, Baehr S, Bambade P, Banerjee S, Bansal V, Barrett M, Baudot J, Becker J, Behera PK, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bianchi F, Biswas D, Bozek A, Bračko M, Branchini P, Briere RA, Browder TE, Budano A, Burmistrov L, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Červenkov D, Chang MC, Cheaib R, Chekelian V, Chen YQ, Chen YT, Cheon BG, Chilikin K, Cho K, Cho S, Choi SK, Choudhury S, Cinabro D, Corona L, Cremaldi LM, 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, Doležal Z, Domínguez Jiménez I, Dong TV, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Fast JE, Ferber T, Ferlewicz D, Finocchiaro G, Fiore S, Fodor A, Forti F, Fulsom BG, Ganiev E, Garcia-Hernandez M, Garg R, Gaur V, Gaz 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 MT, Heredia de la Cruz I, Hernández Villanueva M, Hershenhorn A, Higuchi T, Hill EC, Hoek M, Hsu CL, Hu Y, Iijima T, Inami K, Inguglia G, Irakkathil Jabbar J, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaffe DE, Jang EJ, Jeon HB, Jia S, Jin Y, Joo C, Joo KK, Kahn J, Kakuno H, Kaliyar AB, Kandra J, Karyan G, Kato Y, Kawasaki T, Kim BH, Kim CH, Kim DY, Kim KH, Kim SH, Kim YK, Kim Y, Kimmel TD, Kindo H, Kleinwort C, Kodyš P, Koga T, Kohani S, Komarov I, Korpar S, Kovalchuk N, Kraetzschmar TMG, Križan P, Kroeger R, Krokovny P, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kurz S, Kuzmin A, Kwon YJ, Lacaprara S, La Licata C, Lanceri L, Lange JS, Lautenbach K, Lee IS, Lee SC, Leitl P, Levit D, Li LK, Li YB, Libby J, Lieret K, Li Gioi L, Liptak Z, Liu QY, 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 JC, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Miyake H, Mizuk R, Azmi K, Mohanty GB, Moon T, Morii T, Moser HG, Mueller F, Müller FJ, Muller T, Muroyama G, Mussa R, Nakano E, Nakao M, Nayak M, Nazaryan G, Neverov D, Niebuhr C, Nisar NK, 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 TK, Peruzzi I, Peschke R, Pestotnik R, Piccolo M, Piilonen LE, Popov V, Praz C, Prencipe E, Prim MT, Purohit MV, Rados P, Rasheed R, Reiter S, Remnev M, Resmi PK, Ripp-Baudot I, Ritter M, Rizzo G, Rizzuto LB, Robertson SH, Rodríguez Pérez D, Roney JM, Rosenfeld C, Rostomyan A, Rout N, Russo G, Sahoo D, Sakai Y, Sandilya S, Sangal A, Santelj L, Sartori P, Sato Y, Savinov V, Scavino B, Schueler J, Schwanda C, Seddon RM, Seino Y, Selce A, Senyo K, Sfienti C, Shen CP, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sobie RJ, Soffer A, Sokolov A, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Strube J, Sumihama M, Sumiyoshi T, Summers DJ, Suzuki SY, 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 SE, van Tonder R, Varner GS, Varvell KE, Vinokurova A, Vitale L, Vossen A, Wakai M, Wakeling HM, Wan Abdullah W, Wang CH, Wang MZ, Warburton A, Watanabe M, Webb J, Wehle S, Wessel C, Wiechczynski J, Windel H, Won E, Yabsley B, Yamada S, Yan W, Yang SB, Ye H, Yin JH, Yonenaga M, Yuan CZ, Yusa Y, Zani L, Zhang Z, Zhilich V, Zhou QD, Zhou XY, Zhukova VI. Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States. Phys Rev Lett. 2020 Apr 10;124(14):141801. doi: 10.1103/PhysRevLett.124.141801. PMID: 32338980.
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Phys Rev Lett. 2020 Apr 10;124(14):141801. doi: 10.1103/PhysRevLett.124.141801.

Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States.

Physical review letters

I Adachi, P Ahlburg, H Aihara, N Akopov, A Aloisio, N Anh Ky, D M Asner, H Atmacan, T Aushev, V Aushev, T Aziz, V Babu, S Baehr, P Bambade, Sw Banerjee, V Bansal, M Barrett, J Baudot, J Becker, P K Behera, J V Bennett, E Bernieri, F U Bernlochner, M Bertemes, M Bessner, S Bettarini, F Bianchi, D Biswas, A Bozek, M Bračko, P Branchini, R A Briere, T E Browder, A Budano, L Burmistrov, S Bussino, M Campajola, L Cao, G Casarosa, C Cecchi, D Červenkov, M-C Chang, R Cheaib, V Chekelian, Y Q Chen, Y-T Chen, B G Cheon, K Chilikin, K Cho, S Cho, S-K Choi, S Choudhury, D Cinabro, L Corona, L M Cremaldi, S Cunliffe, T Czank, F Dattola, E De La Cruz-Burelo, G De Nardo, M De Nuccio, G De Pietro, R de Sangro, M Destefanis, S Dey, A De Yta-Hernandez, F Di Capua, Z Doležal, I Domínguez Jiménez, T V Dong, K Dort, D Dossett, S Dubey, S Duell, G Dujany, S Eidelman, M Eliachevitch, J E Fast, T Ferber, D Ferlewicz, G Finocchiaro, S Fiore, A Fodor, F Forti, B G Fulsom, E Ganiev, M Garcia-Hernandez, R Garg, V Gaur, A Gaz, A Gellrich, J Gemmler, T Geßler, R Giordano, A Giri, B Gobbo, R Godang, P Goldenzweig, B Golob, P Gomis, W Gradl, E Graziani, D Greenwald, Y Guan, C Hadjivasiliou, S Halder, T Hara, O Hartbrich, K Hayasaka, H Hayashii, C Hearty, M T Hedges, I Heredia de la Cruz, M Hernández Villanueva, A Hershenhorn, T Higuchi, E C Hill, M Hoek, C-L Hsu, Y Hu, T Iijima, K Inami, G Inguglia, J Irakkathil Jabbar, A Ishikawa, R Itoh, Y Iwasaki, W W Jacobs, D E Jaffe, E-J Jang, H B Jeon, S Jia, Y Jin, C Joo, K K Joo, J Kahn, H Kakuno, A B Kaliyar, J Kandra, G Karyan, Y Kato, T Kawasaki, B H Kim, C-H Kim, D Y Kim, K-H Kim, S-H Kim, Y K Kim, Y Kim, T D Kimmel, H Kindo, C Kleinwort, P Kodyš, T Koga, S Kohani, I Komarov, S Korpar, N Kovalchuk, T M G Kraetzschmar, P Križan, R Kroeger, P Krokovny, T Kuhr, J Kumar, M Kumar, R Kumar, K Kumara, S Kurz, A Kuzmin, Y-J Kwon, S Lacaprara, C La Licata, L Lanceri, J S Lange, K Lautenbach, I-S Lee, S C Lee, P Leitl, D Levit, L K Li, Y B Li, J Libby, K Lieret, L Li Gioi, Z Liptak, Q Y Liu, D Liventsev, S Longo, T Luo, Y Maeda, M Maggiora, E Manoni, S Marcello, C Marinas, A Martini, M Masuda, T Matsuda, K Matsuoka, D Matvienko, F Meggendorfer, J C Mei, F Meier, M Merola, F Metzner, M Milesi, C Miller, K Miyabayashi, H Miyake, R Mizuk, K Azmi, G B Mohanty, T Moon, T Morii, H-G Moser, F Mueller, F J Müller, Th Muller, G Muroyama, R Mussa, E Nakano, M Nakao, M Nayak, G Nazaryan, D Neverov, C Niebuhr, N K Nisar, S Nishida, K Nishimura, M Nishimura, B Oberhof, K Ogawa, Y Onishchuk, H Ono, Y Onuki, P Oskin, H Ozaki, P Pakhlov, G Pakhlova, A Paladino, A Panta, E Paoloni, H Park, B Paschen, A Passeri, A Pathak, S Paul, T K Pedlar, I Peruzzi, R Peschke, R Pestotnik, M Piccolo, L E Piilonen, V Popov, C Praz, E Prencipe, M T Prim, M V Purohit, P Rados, R Rasheed, S Reiter, M Remnev, P K Resmi, I Ripp-Baudot, M Ritter, G Rizzo, L B Rizzuto, S H Robertson, D Rodríguez Pérez, J M Roney, C Rosenfeld, A Rostomyan, N Rout, G Russo, D Sahoo, Y Sakai, S Sandilya, A Sangal, L Santelj, P Sartori, Y Sato, V Savinov, B Scavino, J Schueler, C Schwanda, R M Seddon, Y Seino, A Selce, K Senyo, C Sfienti, C P Shen, J-G Shiu, B Shwartz, A Sibidanov, F Simon, R J Sobie, A Soffer, A Sokolov, E Solovieva, S Spataro, B Spruck, M Starič, S Stefkova, Z S Stottler, R Stroili, J Strube, M Sumihama, T Sumiyoshi, D J Summers, S Y Suzuki, M Tabata, M Takizawa, U Tamponi, S Tanaka, K Tanida, N Taniguchi, P Taras, F Tenchini, E Torassa, K Trabelsi, T Tsuboyama, M Uchida, K Unger, Y Unno, S Uno, Y Ushiroda, S E Vahsen, R van Tonder, G S Varner, K E Varvell, A Vinokurova, L Vitale, A Vossen, M Wakai, H M Wakeling, W Wan Abdullah, C H Wang, M-Z Wang, A Warburton, M Watanabe, J Webb, S Wehle, C Wessel, J Wiechczynski, H Windel, E Won, B Yabsley, S Yamada, W Yan, S B Yang, H Ye, J H Yin, M Yonenaga, C Z Yuan, Y Yusa, L Zani, Z Zhang, V Zhilich, Q D Zhou, X Y Zhou, V I Zhukova,

Affiliations

  1. The Graduate University for Advanced Studies (SOKENDAI), Hayama 240-0193.
  2. High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
  3. University of Bonn, 53115 Bonn.
  4. Department of Physics, University of Tokyo, Tokyo 113-0033.
  5. Alikhanyan National Science Laboratory, Yerevan 0036.
  6. INFN Sezione di Napoli, I-80126 Napoli.
  7. Dipartimento di Scienze Fisiche, Università di Napoli Federico II, I-80126 Napoli.
  8. Institute of Theoretical and Applied Research (ITAR), Duy Tan University, Hanoi 100000, Vietnam.
  9. Institute of Physics, Hanoi.
  10. Brookhaven National Laboratory, Upton, New York 11973.
  11. University of Cincinnati, Cincinnati, Ohio 45221.
  12. Moscow Institute of Physics and Technology, Moscow Region 141700.
  13. Taras Shevchenko National Univ. of Kiev, Kiev.
  14. Tata Institute of Fundamental Research, Mumbai 400005.
  15. Deutsches Elektronen-Synchrotron, 22607 Hamburg.
  16. Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
  17. Laboratoire de l'Accélérateur Linéaire, IN2P3/CNRS et Université Paris-Sud 11, Centre Scientifique d'Orsay, F-91898 Orsay Cedex.
  18. University of Louisville, Louisville, Kentucky 40292.
  19. Pacific Northwest National Laboratory, Richland, Washington 99352.
  20. Université de Strasbourg, CNRS, IPHC, UMR 7178, 67037 Strasbourg.
  21. Indian Institute of Technology Madras, Chennai 600036.
  22. University of Mississippi, University, Mississippi 38677.
  23. INFN Sezione di Roma Tre, I-00146 Roma.
  24. Institute of High Energy Physics, Vienna 1050, Austria.
  25. University of Hawaii, Honolulu, Hawaii 96822.
  26. INFN Sezione di Pisa, I-56127 Pisa.
  27. Dipartimento di Fisica, Università di Pisa, I-56127 Pisa.
  28. INFN Sezione di Torino, I-10125 Torino.
  29. Dipartimento di Fisica, Università di Torino, I-10125 Torino.
  30. H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
  31. J. Stefan Institute, 1000 Ljubljana.
  32. University of Maribor, 2000 Maribor.
  33. Carnegie Mellon University, Pittsburgh, Pennsylvania 15213.
  34. Dipartimento di Matematica e Fisica, Università di Roma Tre, I-00146 Roma.
  35. INFN Sezione di Perugia, I-06123 Perugia.
  36. Dipartimento di Fisica, Università di Perugia, I-06123 Perugia.
  37. Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
  38. Department of Physics, Fu Jen Catholic University, Taipei 24205.
  39. University of British Columbia, Vancouver, British Columbia, V6T 1Z1.
  40. Max-Planck-Institut für Physik, 80805 München.
  41. University of Science and Technology of China, Hefei 230026.
  42. Department of Physics, National Taiwan University, Taipei 10617.
  43. Department of Physics and Institute of Natural Sciences, Hanyang University, Seoul 04763.
  44. P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991.
  45. Korea Institute of Science and Technology Information, Daejeon 34141.
  46. Yonsei University, Seoul 03722.
  47. Gyeongsang National University, Jinju 52828.
  48. Indian Institute of Technology Hyderabad, Telangana 502285.
  49. Wayne State University, Detroit, Michigan 48202.
  50. Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa 277-8583.
  51. Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Mexico City 07360.
  52. INFN Laboratori Nazionali di Frascati, I-00044 Frascati.
  53. Tel Aviv University, School of Physics and Astronomy, Tel Aviv, 69978.
  54. Universidad Autonoma de Sinaloa, Sinaloa 80000.
  55. Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443.
  56. Justus-Liebig-Universität Gießen, 35392 Gießen.
  57. School of Physics, University of Melbourne, Victoria 3010.
  58. Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090.
  59. Novosibirsk State University, Novosibirsk 630090.
  60. INFN Sezione di Roma, I-00185 Roma.
  61. McGill University, Montréal, Québec, H3A 2T8.
  62. INFN Sezione di Trieste, I-34127 Trieste.
  63. Dipartimento di Fisica, Università di Trieste, I-34127 Trieste.
  64. Panjab University, Chandigarh 160014.
  65. Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
  66. Graduate School of Science, Nagoya University, Nagoya 464-8602.
  67. Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
  68. University of South Alabama, Mobile, Alabama 36688.
  69. Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
  70. Instituto de Fisica Corpuscular, Paterna 46980.
  71. Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, D-55099 Mainz.
  72. Department of Physics, Technische Universität München, 85748 Garching.
  73. Niigata University, Niigata 950-2181.
  74. Nara Women's University, Nara 630-8506.
  75. Institute of Particle Physics (Canada), Victoria, British Columbia V8W 2Y2.
  76. Consejo Nacional de Ciencia y Tecnología, Mexico City 03940.
  77. School of Physics, University of Sydney, New South Wales 2006.
  78. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
  79. Indiana University, Bloomington, Indiana 47408.
  80. Kyungpook National University, Daegu 41566.
  81. Beihang University, Beijing 100191.
  82. Chonnam National University, Gwangju 61186.
  83. Tokyo Metropolitan University, Tokyo 192-0397.
  84. Kitasato University, Sagamihara 252-0373.
  85. Seoul National University, Seoul 08826.
  86. Soongsil University, Seoul 06978.
  87. Korea University, Seoul 02841.
  88. Ludwig Maximilians University, 80539 Munich.
  89. Malaviya National Institute of Technology Jaipur, Jaipur 302017.
  90. Punjab Agricultural University, Ludhiana 141004.
  91. INFN Sezione di Padova, I-35131 Padova.
  92. Peking University, Beijing 100871.
  93. University of Victoria, Victoria, British Columbia, V8W 3P6.
  94. Earthquake Research Institute, University of Tokyo, Tokyo 113-0032.
  95. Research Center for Nuclear Physics, Osaka University, Osaka 567-0047.
  96. University of Miyazaki, Miyazaki 889-2192.
  97. Duke University, Durham, North Carolina 27708.
  98. National Centre for Particle Physics, University Malaya, 50603 Kuala Lumpur.
  99. Osaka City University, Osaka 558-8585.
  100. University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
  101. Moscow Physical Engineering Institute, Moscow 115409.
  102. Luther College, Decorah, Iowa 52101.
  103. Forschungszentrum Jülich, 52425 Jülich.
  104. Okinawa Institute of Science and Technology, Okinawa 904-0495.
  105. University of South Carolina, Columbia, South Carolina 29208.
  106. Dipartimento di Fisica e Astronomia, Università di Padova, I-35131 Padova.
  107. Department of Physics, Tohoku University, Sendai 980-8578.
  108. Yamagata University, Yamagata 990-8560.
  109. Institute for High Energy Physics, Protvino 142281.
  110. Gifu University, Gifu 501-1193.
  111. Chiba University, Chiba 263-8522.
  112. J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
  113. Theoretical Research Division, Nishina Center, RIKEN, Saitama 351-0198.
  114. Showa Pharmaceutical University, Tokyo 194-8543.
  115. Advanced Science Research Center, Japan Atomic Energy Agency, Naka 319-1195.
  116. Université de Montréal, Physique des Particules, Montréal, Québec, H3C 3J7.
  117. Tokyo Institute of Technology, Tokyo 152-8550.
  118. National United University, Miao Li 36003.

PMID: 32338980 DOI: 10.1103/PhysRevLett.124.141801

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^{-}→μ^{+}μ^{-}Z^{'} and of a lepton-flavor-violating Z^{'} in e^{+}e^{-}→e^{±}μ^{∓}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_{μ}-L_{τ} theory, into upper limits on the Z^{'} coupling constant at the level of 5×10^{-2}-1 for M_{Z^{'}}≤6  GeV/c^{2}.

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