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
I Adachi
1
2
, P Ahlburg
3
, H Aihara
4
, N Akopov
5
, A Aloisio
6
7
, N Anh Ky
8
9
, D M Asner
10
, H Atmacan
11
, T Aushev
12
, V Aushev
13
, T Aziz
14
, V Babu
15
, S Baehr
16
, P Bambade
17
, Sw Banerjee
18
, V Bansal
19
, M Barrett
2
, J Baudot
20
, J Becker
16
, P K Behera
21
, J V Bennett
22
, E Bernieri
23
, F U Bernlochner
3
, M Bertemes
24
, M Bessner
25
, S Bettarini
26
27
, F Bianchi
28
29
, D Biswas
18
, A Bozek
30
, M Bračko
31
32
, P Branchini
23
, R A Briere
33
, T E Browder
25
, A Budano
23
, L Burmistrov
17
, S Bussino
23
34
, M Campajola
6
7
, L Cao
3
, G Casarosa
26
27
, C Cecchi
35
36
, D Červenkov
37
, M-C Chang
38
, R Cheaib
39
, V Chekelian
40
, Y Q Chen
41
, Y-T Chen
42
, B G Cheon
43
, K Chilikin
44
, K Cho
45
, S Cho
46
, S-K Choi
47
, S Choudhury
48
, D Cinabro
49
, L Corona
26
27
, L M Cremaldi
22
, S Cunliffe
15
, T Czank
50
, F Dattola
15
, E De La Cruz-Burelo
51
, G De Nardo
6
7
, M De Nuccio
15
, G De Pietro
23
34
, R de Sangro
52
, M Destefanis
28
29
, S Dey
53
, A De Yta-Hernandez
51
, F Di Capua
6
7
, Z Doležal
37
, I Domínguez Jiménez
54
, T V Dong
55
, K Dort
56
, D Dossett
57
, S Dubey
25
, S Duell
3
, G Dujany
20
, S Eidelman
58
44
59
, M Eliachevitch
3
, J E Fast
19
, T Ferber
15
, D Ferlewicz
57
, G Finocchiaro
52
, S Fiore
60
, A Fodor
61
, F Forti
26
27
, B G Fulsom
19
, E Ganiev
62
63
, M Garcia-Hernandez
51
, R Garg
64
, V Gaur
65
, A Gaz
66
67
, A Gellrich
15
, J Gemmler
16
, T Geßler
56
, R Giordano
6
7
, A Giri
48
, B Gobbo
62
, R Godang
68
, P Goldenzweig
16
, B Golob
31
69
, P Gomis
70
, W Gradl
71
, E Graziani
23
, D Greenwald
72
, Y Guan
11
, C Hadjivasiliou
19
, S Halder
14
, T Hara
1
2
, O Hartbrich
25
, K Hayasaka
73
, H Hayashii
74
, C Hearty
75
39
, M T Hedges
25
, I Heredia de la Cruz
51
76
, M Hernández Villanueva
22
, A Hershenhorn
39
, T Higuchi
50
, E C Hill
39
, M Hoek
71
, C-L Hsu
77
, Y Hu
78
, T Iijima
66
67
, K Inami
66
, G Inguglia
24
, J Irakkathil Jabbar
16
, A Ishikawa
1
2
, R Itoh
1
2
, Y Iwasaki
2
, W W Jacobs
79
, D E Jaffe
10
, E-J Jang
47
, H B Jeon
80
, S Jia
81
, Y Jin
62
, C Joo
50
, K K Joo
82
, J Kahn
16
, H Kakuno
83
, A B Kaliyar
14
, J Kandra
37
, G Karyan
5
, Y Kato
66
67
, T Kawasaki
84
, B H Kim
85
, C-H Kim
43
, D Y Kim
86
, K-H Kim
46
, S-H Kim
43
, Y K Kim
46
, Y Kim
87
, T D Kimmel
65
, H Kindo
1
2
, C Kleinwort
15
, P Kodyš
37
, T Koga
2
, S Kohani
25
, I Komarov
15
, S Korpar
31
32
, N Kovalchuk
15
, T M G Kraetzschmar
40
, P Križan
31
69
, R Kroeger
22
, P Krokovny
58
59
, T Kuhr
88
, J Kumar
33
, M Kumar
89
, R Kumar
90
, K Kumara
49
, S Kurz
15
, A Kuzmin
58
59
, Y-J Kwon
46
, S Lacaprara
91
, C La Licata
50
, L Lanceri
62
, J S Lange
56
, K Lautenbach
56
, I-S Lee
43
, S C Lee
80
, P Leitl
40
, D Levit
72
, L K Li
11
, Y B Li
92
, J Libby
21
, K Lieret
88
, L Li Gioi
40
, Z Liptak
25
, Q Y Liu
55
, D Liventsev
2
65
, S Longo
93
, T Luo
55
, Y Maeda
66
67
, M Maggiora
28
29
, E Manoni
35
, S Marcello
28
29
, C Marinas
70
, A Martini
23
34
, M Masuda
94
95
, T Matsuda
96
, K Matsuoka
66
67
, D Matvienko
58
44
59
, F Meggendorfer
40
, J C Mei
55
, F Meier
97
, M Merola
6
7
, F Metzner
16
, M Milesi
57
, C Miller
93
, K Miyabayashi
74
, H Miyake
1
2
, R Mizuk
44
, K Azmi
98
, G B Mohanty
14
, T Moon
85
, T Morii
50
, H-G Moser
40
, F Mueller
40
, F J Müller
15
, Th Muller
16
, G Muroyama
66
, R Mussa
28
, E Nakano
99
, M Nakao
1
2
, M Nayak
53
, G Nazaryan
5
, D Neverov
66
, C Niebuhr
15
, N K Nisar
100
, S Nishida
1
2
, K Nishimura
25
, M Nishimura
2
, B Oberhof
52
, K Ogawa
73
, Y Onishchuk
13
, H Ono
73
, Y Onuki
4
, P Oskin
44
, H Ozaki
1
2
, P Pakhlov
44
101
, G Pakhlova
44
12
, A Paladino
26
27
, A Panta
22
, E Paoloni
26
27
, H Park
80
, B Paschen
3
, A Passeri
23
, A Pathak
18
, S Paul
72
, T K Pedlar
102
, I Peruzzi
52
, R Peschke
25
, R Pestotnik
31
, M Piccolo
52
, L E Piilonen
65
, V Popov
44
12
, C Praz
15
, E Prencipe
103
, M T Prim
16
, M V Purohit
104
, P Rados
15
, R Rasheed
20
, S Reiter
56
, M Remnev
58
44
, P K Resmi
21
, I Ripp-Baudot
20
, M Ritter
88
, G Rizzo
26
27
, L B Rizzuto
31
, S H Robertson
75
61
, D Rodríguez Pérez
54
, J M Roney
75
93
, C Rosenfeld
105
, A Rostomyan
15
, N Rout
21
, G Russo
6
7
, D Sahoo
14
, Y Sakai
1
2
, S Sandilya
11
, A Sangal
11
, L Santelj
31
69
, P Sartori
91
106
, Y Sato
107
, V Savinov
100
, B Scavino
71
, J Schueler
25
, C Schwanda
24
, R M Seddon
61
, Y Seino
73
, A Selce
35
, K Senyo
108
, C Sfienti
71
, C P Shen
81
, J-G Shiu
42
, B Shwartz
58
44
, A Sibidanov
93
, F Simon
40
, R J Sobie
93
, A Soffer
53
, A Sokolov
109
, E Solovieva
44
, S Spataro
28
29
, B Spruck
71
, M Starič
31
, S Stefkova
15
, Z S Stottler
65
, R Stroili
91
106
, J Strube
19
, M Sumihama
110
95
, T Sumiyoshi
83
, D J Summers
22
, S Y Suzuki
1
2
, M Tabata
111
, M Takizawa
112
113
114
, U Tamponi
28
, S Tanaka
1
2
, K Tanida
115
, N Taniguchi
2
, P Taras
116
, F Tenchini
15
, E Torassa
91
, K Trabelsi
17
, T Tsuboyama
1
2
, M Uchida
117
, K Unger
16
, Y Unno
43
, S Uno
1
2
, Y Ushiroda
1
2
4
, S E Vahsen
25
, R van Tonder
3
, G S Varner
25
, K E Varvell
77
, A Vinokurova
58
59
, L Vitale
62
63
, A Vossen
97
, M Wakai
39
, H M Wakeling
61
, W Wan Abdullah
98
, C H Wang
118
, M-Z Wang
42
, A Warburton
61
, M Watanabe
73
, J Webb
57
, S Wehle
15
, C Wessel
3
, J Wiechczynski
26
, H Windel
40
, E Won
87
, B Yabsley
77
, S Yamada
2
, W Yan
41
, S B Yang
87
, H Ye
15
, J H Yin
78
, M Yonenaga
83
, C Z Yuan
78
, Y Yusa
73
, L Zani
26
27
, Z Zhang
41
, V Zhilich
58
59
, Q D Zhou
2
, X Y Zhou
81
, V I Zhukova
44
; Belle II Collaboration
Affiliations
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
Item in Clipboard
Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States
I Adachi et al.
Phys Rev Lett.
.
Free article
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Format
doi: 10.1103/PhysRevLett.124.141801.
Authors
I Adachi
1
2
, P Ahlburg
3
, H Aihara
4
, N Akopov
5
, A Aloisio
6
7
, N Anh Ky
8
9
, D M Asner
10
, H Atmacan
11
, T Aushev
12
, V Aushev
13
, T Aziz
14
, V Babu
15
, S Baehr
16
, P Bambade
17
, Sw Banerjee
18
, V Bansal
19
, M Barrett
2
, J Baudot
20
, J Becker
16
, P K Behera
21
, J V Bennett
22
, E Bernieri
23
, F U Bernlochner
3
, M Bertemes
24
, M Bessner
25
, S Bettarini
26
27
, F Bianchi
28
29
, D Biswas
18
, A Bozek
30
, M Bračko
31
32
, P Branchini
23
, R A Briere
33
, T E Browder
25
, A Budano
23
, L Burmistrov
17
, S Bussino
23
34
, M Campajola
6
7
, L Cao
3
, G Casarosa
26
27
, C Cecchi
35
36
, D Červenkov
37
, M-C Chang
38
, R Cheaib
39
, V Chekelian
40
, Y Q Chen
41
, Y-T Chen
42
, B G Cheon
43
, K Chilikin
44
, K Cho
45
, S Cho
46
, S-K Choi
47
, S Choudhury
48
, D Cinabro
49
, L Corona
26
27
, L M Cremaldi
22
, S Cunliffe
15
, T Czank
50
, F Dattola
15
, E De La Cruz-Burelo
51
, G De Nardo
6
7
, M De Nuccio
15
, G De Pietro
23
34
, R de Sangro
52
, M Destefanis
28
29
, S Dey
53
, A De Yta-Hernandez
51
, F Di Capua
6
7
, Z Doležal
37
, I Domínguez Jiménez
54
, T V Dong
55
, K Dort
56
, D Dossett
57
, S Dubey
25
, S Duell
3
, G Dujany
20
, S Eidelman
58
44
59
, M Eliachevitch
3
, J E Fast
19
, T Ferber
15
, D Ferlewicz
57
, G Finocchiaro
52
, S Fiore
60
, A Fodor
61
, F Forti
26
27
, B G Fulsom
19
, E Ganiev
62
63
, M Garcia-Hernandez
51
, R Garg
64
, V Gaur
65
, A Gaz
66
67
, A Gellrich
15
, J Gemmler
16
, T Geßler
56
, R Giordano
6
7
, A Giri
48
, B Gobbo
62
, R Godang
68
, P Goldenzweig
16
, B Golob
31
69
, P Gomis
70
, W Gradl
71
, E Graziani
23
, D Greenwald
72
, Y Guan
11
, C Hadjivasiliou
19
, S Halder
14
, T Hara
1
2
, O Hartbrich
25
, K Hayasaka
73
, H Hayashii
74
, C Hearty
75
39
, M T Hedges
25
, I Heredia de la Cruz
51
76
, M Hernández Villanueva
22
, A Hershenhorn
39
, T Higuchi
50
, E C Hill
39
, M Hoek
71
, C-L Hsu
77
, Y Hu
78
, T Iijima
66
67
, K Inami
66
, G Inguglia
24
, J Irakkathil Jabbar
16
, A Ishikawa
1
2
, R Itoh
1
2
, Y Iwasaki
2
, W W Jacobs
79
, D E Jaffe
10
, E-J Jang
47
, H B Jeon
80
, S Jia
81
, Y Jin
62
, C Joo
50
, K K Joo
82
, J Kahn
16
, H Kakuno
83
, A B Kaliyar
14
, J Kandra
37
, G Karyan
5
, Y Kato
66
67
, T Kawasaki
84
, B H Kim
85
, C-H Kim
43
, D Y Kim
86
, K-H Kim
46
, S-H Kim
43
, Y K Kim
46
, Y Kim
87
, T D Kimmel
65
, H Kindo
1
2
, C Kleinwort
15
, P Kodyš
37
, T Koga
2
, S Kohani
25
, I Komarov
15
, S Korpar
31
32
, N Kovalchuk
15
, T M G Kraetzschmar
40
, P Križan
31
69
, R Kroeger
22
, P Krokovny
58
59
, T Kuhr
88
, J Kumar
33
, M Kumar
89
, R Kumar
90
, K Kumara
49
, S Kurz
15
, A Kuzmin
58
59
, Y-J Kwon
46
, S Lacaprara
91
, C La Licata
50
, L Lanceri
62
, J S Lange
56
, K Lautenbach
56
, I-S Lee
43
, S C Lee
80
, P Leitl
40
, D Levit
72
, L K Li
11
, Y B Li
92
, J Libby
21
, K Lieret
88
, L Li Gioi
40
, Z Liptak
25
, Q Y Liu
55
, D Liventsev
2
65
, S Longo
93
, T Luo
55
, Y Maeda
66
67
, M Maggiora
28
29
, E Manoni
35
, S Marcello
28
29
, C Marinas
70
, A Martini
23
34
, M Masuda
94
95
, T Matsuda
96
, K Matsuoka
66
67
, D Matvienko
58
44
59
, F Meggendorfer
40
, J C Mei
55
, F Meier
97
, M Merola
6
7
, F Metzner
16
, M Milesi
57
, C Miller
93
, K Miyabayashi
74
, H Miyake
1
2
, R Mizuk
44
, K Azmi
98
, G B Mohanty
14
, T Moon
85
, T Morii
50
, H-G Moser
40
, F Mueller
40
, F J Müller
15
, Th Muller
16
, G Muroyama
66
, R Mussa
28
, E Nakano
99
, M Nakao
1
2
, M Nayak
53
, G Nazaryan
5
, D Neverov
66
, C Niebuhr
15
, N K Nisar
100
, S Nishida
1
2
, K Nishimura
25
, M Nishimura
2
, B Oberhof
52
, K Ogawa
73
, Y Onishchuk
13
, H Ono
73
, Y Onuki
4
, P Oskin
44
, H Ozaki
1
2
, P Pakhlov
44
101
, G Pakhlova
44
12
, A Paladino
26
27
, A Panta
22
, E Paoloni
26
27
, H Park
80
, B Paschen
3
, A Passeri
23
, A Pathak
18
, S Paul
72
, T K Pedlar
102
, I Peruzzi
52
, R Peschke
25
, R Pestotnik
31
, M Piccolo
52
, L E Piilonen
65
, V Popov
44
12
, C Praz
15
, E Prencipe
103
, M T Prim
16
, M V Purohit
104
, P Rados
15
, R Rasheed
20
, S Reiter
56
, M Remnev
58
44
, P K Resmi
21
, I Ripp-Baudot
20
, M Ritter
88
, G Rizzo
26
27
, L B Rizzuto
31
, S H Robertson
75
61
, D Rodríguez Pérez
54
, J M Roney
75
93
, C Rosenfeld
105
, A Rostomyan
15
, N Rout
21
, G Russo
6
7
, D Sahoo
14
, Y Sakai
1
2
, S Sandilya
11
, A Sangal
11
, L Santelj
31
69
, P Sartori
91
106
, Y Sato
107
, V Savinov
100
, B Scavino
71
, J Schueler
25
, C Schwanda
24
, R M Seddon
61
, Y Seino
73
, A Selce
35
, K Senyo
108
, C Sfienti
71
, C P Shen
81
, J-G Shiu
42
, B Shwartz
58
44
, A Sibidanov
93
, F Simon
40
, R J Sobie
93
, A Soffer
53
, A Sokolov
109
, E Solovieva
44
, S Spataro
28
29
, B Spruck
71
, M Starič
31
, S Stefkova
15
, Z S Stottler
65
, R Stroili
91
106
, J Strube
19
, M Sumihama
110
95
, T Sumiyoshi
83
, D J Summers
22
, S Y Suzuki
1
2
, M Tabata
111
, M Takizawa
112
113
114
, U Tamponi
28
, S Tanaka
1
2
, K Tanida
115
, N Taniguchi
2
, P Taras
116
, F Tenchini
15
, E Torassa
91
, K Trabelsi
17
, T Tsuboyama
1
2
, M Uchida
117
, K Unger
16
, Y Unno
43
, S Uno
1
2
, Y Ushiroda
1
2
4
, S E Vahsen
25
, R van Tonder
3
, G S Varner
25
, K E Varvell
77
, A Vinokurova
58
59
, L Vitale
62
63
, A Vossen
97
, M Wakai
39
, H M Wakeling
61
, W Wan Abdullah
98
, C H Wang
118
, M-Z Wang
42
, A Warburton
61
, M Watanabe
73
, J Webb
57
, S Wehle
15
, C Wessel
3
, J Wiechczynski
26
, H Windel
40
, E Won
87
, B Yabsley
77
, S Yamada
2
, W Yan
41
, S B Yang
87
, H Ye
15
, J H Yin
78
, M Yonenaga
83
, C Z Yuan
78
, Y Yusa
73
, L Zani
26
27
, Z Zhang
41
, V Zhilich
58
59
, Q D Zhou
2
, X Y Zhou
81
, V I Zhukova
44
; Belle II Collaboration
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
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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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