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

A search for a new <math display="inline"><msup><mi>Z</mi><mo>′</mo></msup></math> gauge boson associated with (un)broken <math display="inline"><mi>B</mi><mo>-</mo><mi>L</mi></math> s...

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Detalles Bibliográficos
Autores principales: Andreev, Yu.M., Banerjee, D., Banto-Oberhauser, B., Bernhard, J., Bisio, P., Bondi, M., Burtsev, V.E., Celentano, A., Charitonidis, N., Chumakov, A.G., Cooke, D., Crivelli, P., Depero, E., Dermenev, A.V., Donskov, S.V., Dusaev, R.R., Enik, T., Frolov, V.N., Gardikiotis, A., Gerassimov, S.G., Gninenko, S.N., Hosgen, M., Jeckel, M., Kachanov, V.A., Karneyeu, A.E., Kekelidze, G.D., Ketzer, B., Kirpichnikov, D.V., Kirsanov, M.M., Kolosov, V.N., Kovalenko, S.G., Kramarenko, V.A., Kravchuk, L.V., Krasnikov, N.V., Kuleshov, S.V., Lyubovitskij, V.E., Lysan, V., Marsicano, L., Matveev, V.A., Mikhailov, Yu.V., Molina Bueno, L., Peshekhonov, D.V., Polyakov, V.A., Radics, B., Rubbia, A., Samalantin, K.M., Samoylenko, V.D., Sieber, H., Shchukin, D., Soto, O., Tikhomirov, V.O., Tlisova, I.V., Toropin, A.N., Vasilishin, B.I., Volkov, P.V., Volkov, V.Yu., Voronchikhin, I., Zamora-Saa, J.
Lenguaje:eng
Publicado: 2022
Materias:
hep-ph
Particle Physics - Phenomenology
hep-ex
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.129.161801
http://cds.cern.ch/record/2816458
Descripción
Sumario:A search for a new <math display="inline"><msup><mi>Z</mi><mo>′</mo></msup></math> gauge boson associated with (un)broken <math display="inline"><mi>B</mi><mo>-</mo><mi>L</mi></math> 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 <math display="inline"><mn>3.22</mn><mo>×</mo><msup><mn>10</mn><mn>11</mn></msup></math> electrons on target collected during 2016–2021 runs, no signal events were found. This allows us to derive new constraints on the <math display="inline"><msup><mi>Z</mi><mo>′</mo></msup><mo>-</mo><mi>e</mi></math> coupling strength, which, for the mass range <math display="inline"><mn>0.3</mn><mo>≲</mo><msub><mi>m</mi><msup><mi>Z</mi><mo>′</mo></msup></msub><mo>≲</mo><mn>100</mn><mtext> </mtext><mtext> </mtext><mi>MeV</mi></math>, are more stringent compared to those obtained from the neutrino-electron scattering data.

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