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, M. Bondi, V. 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
TL;DR
This paper reports a search for a new B-L gauge boson in the keV-GeV mass range using the NA64 experiment at CERN, setting new constraints on its coupling strength based on missing-energy data.
Contribution
First search for a B-L Z' gauge boson in the keV-GeV range using missing-energy technique at CERN, providing more stringent coupling constraints.
Findings
No signal events observed in the data.
New constraints on Z'-e coupling for 0.3-100 MeV mass range.
Constraints surpass previous neutrino-electron scattering limits.
Abstract
A search for a new 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 3.22e11 electrons on target collected during 2016-2021 runs no signal events were found. This allows to derive new constraints on the coupling strength, which for the mass range MeV are more stringent compared to those obtained from the neutrino-electron scattering data.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research