Accès ouvert déclaré
2023
preprint
Probing Light Dark Matter with positron beams at NA64
Yu. M. Andreev, Alexey A. Antonov, D. Banerjee, B. Banto Oberhauser, J. Bernhard, P. Bisio, M. Bondí, A. Celentano, N. Charitonidis, D. Cooke, P. Crivelli, E. Depero, A. V. Dermenev, S. V. Donskov, R. R. Dusaev, T. Enik, V. Frolov, A. Gardikiotis, S. Gerassimov, Sergei N. Gninenko, M. Hösgen, M. Jeckel, Vassili Kachanov, Ysmaiyl Kambar, A. E. Karneyeu, G. D. Kekelidze, B. Ketzer, Dmitry V. Kirpichnikov, M. M. Kirsanov, V. N. Kolosov, I. V. Konorov, S. V. Gertsenberger, E. A. Kasianova, V. A. Kramarenko, Leonid V Kravchuk, Nikolai Valer'evich Krasnikov, S. V. Kuleshov, Valery E. Lyubovitskij, V. M. Lysan, Anna Marini, L. Marsican, Viktor Anatol'evich Matveev, R. Mena Fredes, R. Mena Yanssen, Yu.V. Mikhailov, L. Molina Bueno, M. Mongillo, D. V. Peshekhonov, V. A. Polyakov, B. Radics, Kirill Salamatin, Vladimir D. Samoylenko, H. Sieber, Dmitry G. Shchukin, Orlando Javier Soto Sandoval, V. O. Tikhomirov, I. Tlisova, A. N. Toropin, Andrey Yu. Trifonov, M. Tuzi, P. Volkov, V. Yu. Volkov, I. V. Voronchikhin, J. A. Zamora Saa
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Le résumé fourni par la source
We present the results of a missing-energy search for Light Dark Matter which has a new interaction with ordinary matter transmitted by a vector boson, called dark photon $A^\prime$. For the first time, this search is performed with a positron beam by using the significantly enhanced production of $A^\prime$ in the resonant annihilation of positrons with atomic electrons of the target nuclei, followed by the invisible decay of $A^\prime$ into dark matter. No events were found in the signal region with $(10.1 \pm 0.1)~\times~10^{9}$ positrons on target with 100 GeV energy. This allowed us to set new exclusion limits that, relative to the collected statistics, prove the power of this experimental technique. This measurement is a crucial first step toward a future exploration program with positron beams, whose estimated sensitivity is here presented.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Dark Matter and Cosmic PhenomenaRadiation Therapy and DosimetryAtomic and Subatomic Physics Research