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

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 +/- 0.3(stat)+/- 0.3(syst)] x 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.