XXV International Baldin Seminar on High Energy Physics Problems "Relativistic Nuclear Physics and Quantum Chromodynamics"

Observation of structures at ∼ 17 and ∼ 38 MeV/c2 in the γγ invariant mass spectra in pC, dC, and dCu collisions at plab of a few GeV/c per nucleon

22 Sept 2023, 15:50

20m

Blokhintsev auditorium (BLTP JINR)

Parallel: Dynamics of multiparticle production

Speaker

Abraamyan, Khachik (JINR, Dubna)

Description

The results of an analysis of the invariant mass spectra of photon pairs produced in dC, pC
and dCu interactions at momenta of 2.75, 5.5 and 3.83 GeV/c per nucleon respectively, are
presented. Signals in the form of enhanced structures at invariant masses of about 17 and
38 MeV/c2 are observed. The results of testing of the observed signals, including the results
of the Monte Carlo simulation are presented. The test results support the conclusion that
the observed signals are the consequence of detection of the particles with masses of about
17 and 38 MeV/c2 decaying into a pair of photons.

Peer reviewing

Paper

Accepted on 19 Feb 2024 by Baldin ISHEPP Seminar

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