Search for a New B-L Z^{'} Gauge Boson with the NA64 Experiment at CERN

Yu M Andreev; D Banerjee; B Banto Oberhauser; J Bernhard; P Bisio; V E Burtsev; A Celentano; N Charitonidis; A G Chumakov; D Cooke; P Crivelli; E Depero; A V Dermenev; S V Donskov; R R Dusaev; T Enik; V N Frolov; A Gardikiotis; S G Gerassimov; S N Gninenko; M Hösgen; M Jeckel; V A Kachanov; A E Karneyeu; G Kekelidze; B Ketzer; D V Kirpichnikov; M M Kirsanov; V N Kolosov; S G Kovalenko; V A Kramarenko; L V Kravchuk; N V Krasnikov; S V Kuleshov; V E Lyubovitskij; V Lysan; L Marsicano; V A Matveev; Yu V Mikhailov; L Molina Bueno; D V Peshekhonov; V A Polyakov; B Radics; A Rubbia; K M Samalantin; V D Samoylenko; H Sieber; D Shchukin; O Soto; V O Tikhomirov; I V Tlisova; A N Toropin; B I Vasilishin; P V Volkov; V Yu Volkov; I Voronchikhin; J Zamora-Saá; NA64 Collaboration

doi:10.1103/PhysRevLett.129.161801

Search for a New B-L Z^{'} Gauge Boson with the NA64 Experiment at CERN

Phys Rev Lett. 2022 Oct 14;129(16):161801. doi: 10.1103/PhysRevLett.129.161801.

Authors

Yu M Andreev¹, D Banerjee², B Banto Oberhauser³, J Bernhard², P Bisio^{4

5}, V E Burtsev⁶, A Celentano⁴, N Charitonidis², A G Chumakov⁷, D Cooke⁸, P Crivelli³, E Depero³, A V Dermenev¹, S V Donskov⁹, R R Dusaev⁷, T Enik⁶, V N Frolov⁶, A Gardikiotis¹⁰, S G Gerassimov^{11

12}, S N Gninenko¹, M Hösgen¹³, M Jeckel², V A Kachanov⁹, A E Karneyeu¹, G Kekelidze⁶, B Ketzer¹³, D V Kirpichnikov¹, M M Kirsanov¹, V N Kolosov⁹, S G Kovalenko^{14

15}, V A Kramarenko^{6

16}, L V Kravchuk¹, N V Krasnikov^{1

6}, S V Kuleshov^{14

15}, V E Lyubovitskij^{7

15}, V Lysan⁶, L Marsicano⁴, V A Matveev⁶, Yu V Mikhailov⁹, L Molina Bueno^{3

17}, D V Peshekhonov⁶, V A Polyakov⁹, B Radics³, A Rubbia³, K M Samalantin⁶, V D Samoylenko⁹, H Sieber³, D Shchukin¹², O Soto^{15

18}, V O Tikhomirov¹², I V Tlisova¹, A N Toropin¹, B I Vasilishin⁷, P V Volkov^{6

16}, V Yu Volkov¹⁶, I Voronchikhin⁷, J Zamora-Saá^{14

15}; NA64 Collaboration

Affiliations

¹ Institute for Nuclear Research, 117312 Moscow, Russia.
² CERN, European Organization for Nuclear Research, CH-1211 Geneva, Switzerland.
³ ETH Zürich, Institute for Particle Physics and Astrophysics, CH-8093 Zürich, Switzerland.
⁴ INFN, Sezione di Genova, 16147 Genova, Italia.
⁵ Universitá degli Studi di Genova, 16126 Genova, Italy.
⁶ Joint Institute for Nuclear Research, 141980 Dubna, Russia.
⁷ Tomsk Polytechnic University, 634050 Tomsk, Russia.
⁸ UCL Departement of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
⁹ State Scientific Center of the Russian Federation Institute for High Energy Physics of National Research Center 'Kurchatov Institute' (IHEP), 142281 Protvino, Russia.
¹⁰ Physics Department, University of Patras, 265 04 Patras, Greece.
¹¹ Technische Universität München, Physik Department, 85748 Garching, Germany.
¹² P.N.Lebedev Physical Institute of the Russian Academy of Sciences, 119 991 Moscow, Russia.
¹³ Universität Bonn, Helmholtz-Institut für Strahlen-und Kernphysik, 53115 Bonn, Germany.
¹⁴ Center for Theoretical and Experimental Particle Physics, Facultad de Ciencias Exactas, Universidad Andres Bello, Fernandez Concha 700, Santiago, Chile.
¹⁵ Millennium Institute for Subatomic Physics at High-Energy Frontier (SAPHIR), Fernandez Concha 700, Santiago, Chile.
¹⁶ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia.
¹⁷ Instituto de Fisica Corpuscular (CSIC/UV), Carrer del Catedrátic José Beltrán Martinez, 2, 46980 Paterna, Valencia.
¹⁸ Departamento de Física, Facultad de Ciencias, Universidad de La Serena, Avenida Cisternas 1200, La Serena, Chile.

PMID: 36306760
DOI: 10.1103/PhysRevLett.129.161801

Abstract

A search for a new Z^{'} gauge boson associated with (un)broken B-L symmetry in the keV-GeV mass range is carried out for the first time using the missing-energy technique in the NA64 experiment at the CERN SPS. From the analysis of the data with 3.22×10^{11} electrons on target collected during 2016-2021 runs, no signal events were found. This allows us to derive new constraints on the Z^{'}-e coupling strength, which, for the mass range 0.3≲m_{Z^{'}}≲100 MeV, are more stringent compared to those obtained from the neutrino-electron scattering data.