Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

8-2017

Journal or Book Title

Physical Review C

Volume

96

Issue

2

First Page

024907

DOI

10.1103/PhysRevC.96.024907

Abstract

We report a measurement of e+e− pairs from semileptonic heavy-flavor decays in p+p collisions at √sNN=200 GeV. The e+e− pair yield from b¯b and c¯c is separated by exploiting a double differential fit done simultaneously in dielectron invariant mass and pT. We used three different event generators, pythia, mc@nlo, and powheg, to simulate the e+e− spectra from c¯c and b¯b production. The data can be well described by all three generators within the detector acceptance. However, when using the generators to extrapolate to 4π, significant differences are observed for the total cross section. These difference are less pronounced for b¯b than for c¯c. The same model dependence was observed in already published d+A data. The p+p data are also directly compared with d+A data in mass and pT, and within the statistical accuracy no nuclear modification is seen.

Comments

This article is published as Adare, A., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander et al. "Measurements of e+e− pairs from open heavy flavor in p + p and d + A collisions at √ sNN = 200 GeV." Physical Review C 96, no. 2 (2017): 024907. DOI: 10.1103/PhysRevC.96.024907. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Included in

Nuclear Commons

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