Luminosity determination for the pd reaction at 2.14 GeV with WASA-at-COSY

TL;DR

This paper determines the luminosity for a WASA-at-COSY experiment involving the pd reaction at 2.14 GeV by analyzing forward elastic scattering, providing a precise measurement and angular distribution comparison.

Contribution

The study presents a new measurement of luminosity and the angular distribution for the pd reaction at 2.14 GeV, including comparison with existing data and models.

Findings

Luminosity value: (5.2 ± 0.3(stat) ± 0.3(syst)) × 10^{30} s^{-1}cm^{-2}

Angular distribution for -t between 0.16 and 0.78 (GeV/c)^2

Comparison with previous data and pd double scattering model

Abstract

The luminosity for a WASA-at-COSY experiment involving the pd reaction at 2.14 GeV proton-beam energy is determined by the forward pd elastic scattering, which yields an average beam-on-target value of [5.2\pm0.3(stat)\pm0.3(syst)]*10^{30} s^{-1}cm^{-2}. In addition, the forward pd elastic-scattering angular distribution is obtained with four-momentum transfer squared -t between 0.16 (GeV/c)^{2} and 0.78 (GeV/c)^{2} at this beam energy, which is compared with other experimental data and the pd double scattering model.