Measurements of $\mu \mu$ pairs from open heavy flavor and Drell-Yan in $p+p$ collisions at $\sqrt{s}=200$ GeV

Abstract

PHENIX reports differential cross sections of $\mu \mu$ pairs from semileptonic heavy-flavor decays and the Drell-Yan production mechanism measured in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV at forward and backward rapidity ($1.2<|\eta |<2.2$). The $\mu \mu$ pairs from $c\bar{c}$, $b\bar{b}$, and Drell-Yan are separated using a template fit to unlike- and like-sign muon pair spectra in mass and $p_T$. The azimuthal opening angle correlation between the muons from $c\bar{c}$ and $b\bar{b}$ decays and the pair-$p_T$ distributions are compared to distributions generated using {\sc pythia} and {\sc powheg} models, which both include next-to-leading order processes. The measured distributions for pairs from $c\bar{c}$ are consistent with {\sc pythia} calculations. The $c\bar{c}$ data presents narrower azimuthal correlations and softer $p_T$ distributions compared to distributions generated from {\sc powheg}. The $b\bar{b}$ data are well described by both models. The extrapolated total cross section for bottom production is $3.75\pm 0.24(\mathrm{stat}){\pm }_{0.50}^{0.35}(\mathrm{syst})\pm 0.45(\mathrm{global})$[$\mu$b], which is consistent with previous measurements at the Relativistic Heavy Ion Collider in the same system at the same collision energy, and is approximately a factor of two higher than the central value calculated with theoretical models. The measured Drell-Yan cross section is in good agreement with next-to-leading-order quantum-chromodynamics calculations.

arXiv comment293 authors from 64 institutions, 42 pages, 36 figures, 13 tables. v2 is version accepted for publication in Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

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Cited by in corpus (20)

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• Precision Studies of QCD in the Low Energy Domain of the EIC
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• High-Energy Factorization for Drell-Yan process in $pp$ and $p\bar{p}$ collisions with new Unintegrated PDFs
• Measurement of $J/\psi$ at forward and backward rapidity in $p$+$p$, $p$$+A$l, $p$$+A$u, and ${}^3$He+Au collisions at $\sqrt{s_{{}_{NN}}}=200\mathrm{GeV}$
• Nuclear-modification factor of charged hadrons at forward and backward rapidity in $p$$+$Al and $p$$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Study of Drell-Yan dimuon production in proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}=$ 8.16 TeV
• Evidence of Mass Ordering of Charm and Bottom Quark Energy Loss in Au+Au Collisions at RHIC
• Transverse momentum distributions in low-mass Drell-Yan lepton pair production at NNLO QCD
• A new description of transverse momentum spectra of identified particles produced in proton-proton collisions at high energies
• Measurement of inclusive electrons from open heavy-flavor hadron decays in $p$+$p$ collisions at $\sqrt{s}=200$ GeV with the STAR detector
• W-boson production in TMD factorization
• Measurement of lepton-jet correlation in deep-inelastic scattering with the H1 detector using machine learning for unfolding
• Energy-scaling behavior of intrinsic transverse momentum parameters in Drell-Yan simulation
• Statistical Behavior of Lepton Pair Spectrum in Drell-Yan Process and Signal from Quark-Gluon Plasma in High Energy Collisions
• Recent Findings from Heavy-Flavor Angular Correlation Measurements in Hadronic Collisions
• Coarse-grained binning in Drell-Yan transverse momentum spectra
• Production of $b\bar{b}$ at forward rapidity in $p$+$p$ collisions at $\sqrt{s}=510$ GeV