Registration of neutral charmed mesons production and their decays in pA-interactions at 70 GeV with SVD-2 setup

TL;DR

This paper reports on the detection and measurement of neutral charmed mesons produced in proton-nucleus interactions at 70 GeV, providing new data on charm production cross sections near threshold energies.

Contribution

It presents the first measurement of charm production cross section in pA interactions at 70 GeV using the SVD-2 setup, with detailed analysis of meson decays and signal extraction.

Findings

Measured charm production cross section: 7.1 +/- 2.4(stat.) +/- 1.4(syst.) μb/nucleon.

Achieved a signal/background ratio of approximately 51/38.

Demonstrated the capability of the SVD-2 setup for charm meson detection at this energy.

Abstract

The results of data handling for E-184 experiment obtained with 70 GeV proton beam irradiation of active target with carbon, silicon and lead plates are presented. Two-prongs neutral charmed D0 and \v{D}0 -mesons decays were selected. Signal / background ratio was (51+/-17) / (38+/-13). Registration efficiency for mesons was defined and evaluation for charm production cross section at threshold energy is presented: sigma(c\^c) = 7.1 +/- 2.4(stat.) +/- 1.4(syst.) (\mu/nucleon).