Check of the structure in photon pairs spectra at the invariant mass of about 38 MeV/c2

Khachik Abraamyan; Chris Austin; Mircea Baznat; Konstantin Gudima; Mikhail Kozhin; Sergey Reznikov; Alexander Sorin

doi:10.1051/epjconf/201920408004

EPJ

a
b
d
e
ap
st
h
plus

Proceedings

Open Access

EPJ Web of Conferences 204, 08004 (2019)
https://doi.org/10.1051/epjconf/201920408004

Check of the structure in photon pairs spectra at the invariant mass of about 38 MeV/c²

Khachik Abraamyan¹^,2^*, Chris Austin³, Mircea Baznat⁴, Konstantin Gudima⁴, Mikhail Kozhin¹, Sergey Reznikov¹ and Alexander Sorin¹^,5

¹ VBLHEP JINR, 141980 Dubna, Moscow region, Russia
² Yerevan State University, 0025, Yerevan, Armenia
³ 33 Collins Terrace, Maryport, Cumbria CA15 8DL, England
⁴ Institute of Applied Physics, MD-2028 Kishinev, Moldova
⁵ BLTP JINR, 141980 Dubna, Moscow region, Russia

^* e-mail: abraamyan@jinr.ru

Published online: 3 April 2019

Abstract

Results of analysis of the effective mass spectra of photon pairs produced in dC, dCu and pC interactions at momenta of 2.75, 3.83 and 5.5 GeV/c per nucleon, respectively, are presented. A structure at effective mass of about 38 MeV/c² is observed. The results of testing the observed signal are presented. The test results support the conclusion that the observed signal is the consequence of detection of a particle with a mass of about 38 MeV/c² decaying into a pair of photons.

© The Authors, published by EDP Sciences, 2019

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.