Measurement of inclusive electrons from open heavy-flavor hadron decays in $p+p$ collisions at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$ with the STAR detector

Measurement of inclusive electrons from open heavy-flavor hadron decays in $p + p$ collisions at $\sqrt{s} = 200 GeV$ with the STAR detector

M. S. Abdallah et al. (STAR Collaboration)

Phys. Rev. D 105, 032007 – Published 23 February 2022

Abstract

We report a new measurement of the production cross section for inclusive electrons from open heavy-flavor hadron decays as a function of transverse momentum ( $p_{T}$ ) at midrapidity ( $| y | < 0.7$ ) in $p + p$ collisions at $\sqrt{s} = 200 GeV$ . The result is presented for $2.5 < p_{T} < 10 GeV / c$ with an improved precision above $6 GeV / c$ with respect to the previous measurements, providing more constraints on perturbative QCD calculations. Moreover, this measurement also provides a high-precision reference for measurements of nuclear modification factors for inclusive electrons from open-charm and -bottom hadron decays in heavy-ion collisions.