Электронный каталог

Статья

Andreev, Yu.M.
Probing Light Dark Matter with Positron Beams at NA64 / Yu.M.Andreev, T.Enik, V.N.Frolov, Y.Kambar, G.Kekelidze, E.A.Kasianova, V.A.Kramarenko, N.V.Krasnikov, V.Lysan, V.A.Matveev, D.V.Peshekhonov, K.Salamatin, S.V.Gertsenberger, P.V.Volkov, A.S.Zhevlakov, [NA64 Collab.] // Physical Review D [Electronic resource]. – 2024. – Vol. 109, No. 3. – P. L031103. – URL: https://doi.org/10.1103/PhysRevD.109.L031103. – Bibliogr.: 38.

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 A0. For the first time, this search is performed with a positron beam by using the significantly enhanced production of A0 in the resonant annihilation of positrons with atomic electrons of the target nuclei, followed by the invisible decay of A0 into dark matter. No events were found in the signal region with ð10.1 *( 0.1Þ × 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.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 332.3 - Образование электронно-позитронных пар. Позитрон, позитроний. Взаимодействие позитрона с веществом
Спец.(статьи,препринты) = С 322.2 - Космология. Гравитационные волны