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$First constraints on the \$L_\\mu-L_\\tau\$ explanation of the muon \$g-2\$ anomaly from NA64-\$e\$ at CERN$

First constraints on the \$L_\\mu-L_\\tau\$ explanation of the muon \$g-2\$ anomaly from NA64-\$e\$ at CERN

by Gertsenberger, S V , Zhevlako, A S , Kravchuk, L V , Sieber, H , Cooke, D , Girod, S , Antonov, A , Gardikiotis, A , Kolosov, V N , V Yu Volkov , Voronchikhin, I V , Kekelidze, G , Lysan, V , Lyubovitskij, V E , Soto, O , Volkov, P V , Karneyeu, A E , Dermenev, A V , R Mena Yanssen , Zamora-Saá, J , Salamatin, K , Ketzer, B , Kasianova, E A , Tlisova, I , Toropin, A N , Charitonidis, N , Ulloa, P , Frolov, V N , Peshekhonov, D V , L Molina Bueno , Bisio, P , Kambar, Y , Polyakov, V A , Radics, B , Banerjee, D , Depero, E , Matveev, V A , Crivelli, P , Tuzi, M , Kirpichnikov, D V , Mongillo, M , R Mena Fredes , Donskov, S V , Hösgen, M , Gninenko, S N , Kuleshov, S V , Kachanov, V A , Kramarenko, V A , Bernhard, J , Celentano, A , Andreev, Yu M , Samoylenko, V D , Tikhomirov, V O , Oberhauser, B Banto , Dusaev, R R , Shchukin, D , Enik, T , Marsicano, L , Krasnikov, N V , Kirsanov, M M , Marini, A

in CERN / Dark matter / Electron beams / Magnetic moments / Muons / Particle beams / Searching / Synchrotrons

2024

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First constraints on the \$L_\\mu-L_\\tau\$ explanation of the muon \$g-2\$ anomaly from NA64-\$e\$ at CERN

in CERN / Dark matter / Electron beams / Magnetic moments / Muons / Particle beams / Searching / Synchrotrons

2024

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$First constraints on the \$L_\\mu-L_\\tau\$ explanation of the muon \$g-2\$ anomaly from NA64-\$e\$ at CERN$

First constraints on the \$L_\\mu-L_\\tau\$ explanation of the muon \$g-2\$ anomaly from NA64-\$e\$ at CERN

in CERN / Dark matter / Electron beams / Magnetic moments / Muons / Particle beams / Searching / Synchrotrons

2024

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$First constraints on the \$L_\\mu-L_\\tau\$ explanation of the muon \$g-2\$ anomaly from NA64-\$e\$ at CERN$

Paper

First constraints on the \$L_\\mu-L_\\tau\$ explanation of the muon \$g-2\$ anomaly from NA64-\$e\$ at CERN

Gertsenberger, S V,

Zhevlako, A S,

Kravchuk, L V,

Sieber, H,

Cooke, D,

Girod, S,

Antonov, A,

Gardikiotis, A,

Kolosov, V N,

V Yu Volkov,

Voronchikhin, I V,

Kekelidze, G,

Lysan, V,

Lyubovitskij, V E,

Soto, O,

Volkov, P V,

Karneyeu, A E,

Dermenev, A V,

R Mena Yanssen,

Zamora-Saá, J,

Salamatin, K,

Ketzer, B,

Kasianova, E A,

Tlisova, I,

Toropin, A N,

Charitonidis, N,

Ulloa, P,

Frolov, V N,

Peshekhonov, D V,

L Molina Bueno,

Bisio, P,

Kambar, Y,

Polyakov, V A,

Radics, B,

Banerjee, D,

Depero, E,

Matveev, V A,

Crivelli, P,

Tuzi, M,

Kirpichnikov, D V,

Mongillo, M,

R Mena Fredes,

Donskov, S V,

Hösgen, M,

Gninenko, S N,

Kuleshov, S V,

Kachanov, V A,

Kramarenko, V A,

Bernhard, J,

Celentano, A,

Andreev, Yu M,

Samoylenko, V D,

Tikhomirov, V O,

Oberhauser, B Banto,

Dusaev, R R,

Shchukin, D,

Enik, T,

Marsicano, L,

Krasnikov, N V,

Kirsanov, M M,

Marini, A

2024

Overview

The inclusion of an additional \$U(1)\$ gauge \$L_\\mu-L_\\tau\$ 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 \$\\mu\$ and \$\\tau\$ leptons and interacting with electrons via a loop mechanism. The \$L_\\mu-L_\\tau\$ 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-\$\\mu\$ experiment with a muon beam.

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Publisher

Cornell University Library, arXiv.org

Subject

/ Muons