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First constraints on the $L_μ-L_τ$ explanation of the muon $g-2$ anomaly from NA64-$e$ at CERN

Fuente: arXiv

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Autori principali:	Andreev, Yu. M., Antonov, A., Banerjee, D., Oberhauser, B. Banto, Bernhard, J., Bisio, P., Celentano, A., Charitonidis, N., Cooke, D., Crivelli, P., Depero, E., Dermenev, A. V., Donskov, S. V., Dusaev, R. R., Enik, T., Frolov, V. N., Gardikiotis, A., Gninenko, S. N., Hösgen, M., Kachanov, V. A., Kambar, Y., Karneyeu, A. E., Kekelidze, G., Ketzer, B., Kirpichnikov, D. V., Kirsanov, M. M., Kolosov, V. N., Gertsenberger, S. V., Girod, S., Kasianova, E. A., Kramarenko, V. A., Kravchuk, L. V., Krasnikov, N. V., Kuleshov, S. V., Lyubovitskij, V. E., Lysan, V., Marini, A., Marsicano, L., Matveev, V. A., Fredes, R. Mena, Yanssen, R. Mena, Bueno, L. Molina, Mongillo, M., Peshekhonov, D. V., Polyakov, V. A., Radics, B., Salamatin, K., Samoylenko, V. D., Sieber, H., Shchukin, D., Soto, O., Tikhomirov, V. O., Tlisova, I., Toropin, A. N., Tuzi, M., Ulloa, P., Volkov, P. V., Volkov, V. Yu., Voronchikhin, I. V., Zamora-Saá, J., Zhevlako, A. S.
Natura:	Preprint
Pubblicazione:	2024
Soggetti:	High Energy Physics - Experiment High Energy Physics - Phenomenology
Accesso online:	Acceder al recurso
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_version_	1866917713301995520
author	Andreev, Yu. M. Antonov, A. Banerjee, D. Oberhauser, B. Banto Bernhard, J. Bisio, P. Celentano, A. Charitonidis, N. Cooke, D. Crivelli, P. Depero, E. Dermenev, A. V. Donskov, S. V. Dusaev, R. R. Enik, T. Frolov, V. N. Gardikiotis, A. Gninenko, S. N. Hösgen, M. Kachanov, V. A. Kambar, Y. Karneyeu, A. E. Kekelidze, G. Ketzer, B. Kirpichnikov, D. V. Kirsanov, M. M. Kolosov, V. N. Gertsenberger, S. V. Girod, S. Kasianova, E. A. Kramarenko, V. A. Kravchuk, L. V. Krasnikov, N. V. Kuleshov, S. V. Lyubovitskij, V. E. Lysan, V. Marini, A. Marsicano, L. Matveev, V. A. Fredes, R. Mena Yanssen, R. Mena Bueno, L. Molina Mongillo, M. Peshekhonov, D. V. Polyakov, V. A. Radics, B. Salamatin, K. Samoylenko, V. D. Sieber, H. Shchukin, D. Soto, O. Tikhomirov, V. O. Tlisova, I. Toropin, A. N. Tuzi, M. Ulloa, P. Volkov, P. V. Volkov, V. Yu. Voronchikhin, I. V. Zamora-Saá, J. Zhevlako, A. S.
author_facet	Andreev, Yu. M. Antonov, A. Banerjee, D. Oberhauser, B. Banto Bernhard, J. Bisio, P. Celentano, A. Charitonidis, N. Cooke, D. Crivelli, P. Depero, E. Dermenev, A. V. Donskov, S. V. Dusaev, R. R. Enik, T. Frolov, V. N. Gardikiotis, A. Gninenko, S. N. Hösgen, M. Kachanov, V. A. Kambar, Y. Karneyeu, A. E. Kekelidze, G. Ketzer, B. Kirpichnikov, D. V. Kirsanov, M. M. Kolosov, V. N. Gertsenberger, S. V. Girod, S. Kasianova, E. A. Kramarenko, V. A. Kravchuk, L. V. Krasnikov, N. V. Kuleshov, S. V. Lyubovitskij, V. E. Lysan, V. Marini, A. Marsicano, L. Matveev, V. A. Fredes, R. Mena Yanssen, R. Mena Bueno, L. Molina Mongillo, M. Peshekhonov, D. V. Polyakov, V. A. Radics, B. Salamatin, K. Samoylenko, V. D. Sieber, H. Shchukin, D. Soto, O. Tikhomirov, V. O. Tlisova, I. Toropin, A. N. Tuzi, M. Ulloa, P. Volkov, P. V. Volkov, V. Yu. Voronchikhin, I. V. Zamora-Saá, J. Zhevlako, A. S.
contents	The inclusion of an additional $U(1)$ gauge $L_μ-L_τ$ symmetry would release the tension between the measured and the predicted value of the anomalous muon magnetic moment: this paradigm assumes the existence of a new, light $Z^\prime$ vector boson, with dominant coupling to $μ$ and $τ$ leptons and interacting with electrons via a loop mechanism. The $L_μ-L_τ$ model can also explain the Dark Matter relic abundance, by assuming that the $Z'$ boson acts as a "portal" to a new Dark Sector of particles in Nature, not charged under known interactions. In this work we present the results of the $Z'$ search performed by the NA64-$e$ experiment at CERN SPS, that collected $\sim 9\times10^{11}$ 100 GeV electrons impinging on an active thick target. Despite the suppressed $Z'$ production yield with an electron beam, NA64-$e$ provides the first accelerator-based results excluding the $g-2$ preferred band of the $Z'$ parameter space in the 1 keV $ < m_{Z'} \lesssim 2$ MeV range, in complementarity with the limits recently obtained by the NA64-$μ$ experiment with a muon beam.
format	Preprint
id	arxiv_https___arxiv_org_abs_2404_06982
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	First constraints on the $L_μ-L_τ$ explanation of the muon $g-2$ anomaly from NA64-$e$ at CERN Andreev, Yu. M. Antonov, A. Banerjee, D. Oberhauser, B. Banto Bernhard, J. Bisio, P. Celentano, A. Charitonidis, N. Cooke, D. Crivelli, P. Depero, E. Dermenev, A. V. Donskov, S. V. Dusaev, R. R. Enik, T. Frolov, V. N. Gardikiotis, A. Gninenko, S. N. Hösgen, M. Kachanov, V. A. Kambar, Y. Karneyeu, A. E. Kekelidze, G. Ketzer, B. Kirpichnikov, D. V. Kirsanov, M. M. Kolosov, V. N. Gertsenberger, S. V. Girod, S. Kasianova, E. A. Kramarenko, V. A. Kravchuk, L. V. Krasnikov, N. V. Kuleshov, S. V. Lyubovitskij, V. E. Lysan, V. Marini, A. Marsicano, L. Matveev, V. A. Fredes, R. Mena Yanssen, R. Mena Bueno, L. Molina Mongillo, M. Peshekhonov, D. V. Polyakov, V. A. Radics, B. Salamatin, K. Samoylenko, V. D. Sieber, H. Shchukin, D. Soto, O. Tikhomirov, V. O. Tlisova, I. Toropin, A. N. Tuzi, M. Ulloa, P. Volkov, P. V. Volkov, V. Yu. Voronchikhin, I. V. Zamora-Saá, J. Zhevlako, A. S. High Energy Physics - Experiment High Energy Physics - Phenomenology The inclusion of an additional $U(1)$ gauge $L_μ-L_τ$ symmetry would release the tension between the measured and the predicted value of the anomalous muon magnetic moment: this paradigm assumes the existence of a new, light $Z^\prime$ vector boson, with dominant coupling to $μ$ and $τ$ leptons and interacting with electrons via a loop mechanism. The $L_μ-L_τ$ model can also explain the Dark Matter relic abundance, by assuming that the $Z'$ boson acts as a "portal" to a new Dark Sector of particles in Nature, not charged under known interactions. In this work we present the results of the $Z'$ search performed by the NA64-$e$ experiment at CERN SPS, that collected $\sim 9\times10^{11}$ 100 GeV electrons impinging on an active thick target. Despite the suppressed $Z'$ production yield with an electron beam, NA64-$e$ provides the first accelerator-based results excluding the $g-2$ preferred band of the $Z'$ parameter space in the 1 keV $ < m_{Z'} \lesssim 2$ MeV range, in complementarity with the limits recently obtained by the NA64-$μ$ experiment with a muon beam.
title	First constraints on the $L_μ-L_τ$ explanation of the muon $g-2$ anomaly from NA64-$e$ at CERN
topic	High Energy Physics - Experiment High Energy Physics - Phenomenology
url	https://arxiv.org/abs/2404.06982