Probing Light Dark Matter with positron beams at NA64
Abstract
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 . For the first time, this search is performed with a positron beam by using the significantly enhanced production of in the resonant annihilation of positrons with atomic electrons of the target nuclei, followed by the invisible decay of into dark matter. No events were found in the signal region with 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.
Cite
@article{arxiv.2308.15612,
title = {Probing Light Dark Matter with positron beams at NA64},
author = {Yu. M. Andreev and A. Antonov and D. Banerjee and B. Banto Oberhauser and J. Bernhard and P. Bisio and M. Bondi and A. Celentano and N. Charitonidis and D. Cooke and P. Crivelli and E. Depero and A. V. Dermenev and S. V. Donskov and R. R. Dusaev and T. Enik and V. N. Frolov and A. Gardikiotis and S. G. Gerassimov and S. N. Gninenko and M. Hosgen and M. Jeckel and V. A. Kachanov and Y. Kambar and A. E. Karneyeu and G. Kekelidze and B. Ketzer and D. V. Kirpichnikov and M. M. Kirsanov and V. N. Kolosov and I. V. Konorov and S. V. Gertsenberger and E. A. Kasianova and V. A. Kramarenko and L. V. Kravchuk and N. V. Krasnikov and S. V. Kuleshov and V. E. Lyubovitskij and V. Lysan and A. Marini and L. Marsican and V. A. Matveev and R. M. Fredes and R. M. Yanssen and Yu. V. Mikhailov and L. Molina Bueno and M. Mongillo and D. V. Peshekhonov and V. A. Polyakov and B. Radics and K. Salamatin and V. D. Samoylenko and H. Sieber and D. Shchukin and O. Soto and V. O. Tikhomirov and I. Tlisova and A. N. Toropin and A. Yu. Trifonov and M. Tuzi and P. Ulloa and P. V. Volkov and V. Yu. Volkov and I. V. Voronchikhin and J. Zamora-Saa and A. S. Zhevlakov},
journal= {arXiv preprint arXiv:2308.15612},
year = {2023}
}
Comments
Version submitted to PRL