Nuclear modification of vector boson production in proton-lead collisions at the LHC

Abstract

In anticipating the upcoming proton-lead run at the LHC in the near future, we present predictions for the nuclear modification factor of transverse momentum spectrum of $Z^0$ production and transverse momentum broadening of vector boson ($J/\psi$, ${\rm Y}$, $W/Z^0$) production in proton-lead collisions at $\sqrt{s}=5$ TeV, respectively. We find that the measurement of nuclear modification factor of $Z^0$ production provides a clean and unambiguous test of the nuclear anti-shadowing proposed in the recent EPS09. In addition, the dramatic difference in transverse momentum broadening between the heavy quarkonium and $W/Z^0$ production could be a signature prediction of QCD parton multiple scattering, and it provides valuable informations on color neutralization of a produced heavy quark pair when it transmutes into a physical quarkonium.

9 pages, 5 figures, minor modification, version to appear in PLB

References in corpus (9)

• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Nuclear modification of high transverse momentum particle production in p+A collisions at RHIC and LHC
• N-Jettiness as a probe of nuclear dynamics
• Transverse momentum broadening of vector boson production in high energy nuclear collisions
• Transverse momentum imbalance of back-to-back particle production in p+A and e+A collisions
• Low-mass lepton pair production at large transverse momentum
• Nuclear Modification to Parton Distribution Functions and Parton Saturation

Cited by in corpus (8)

• Probing Gluon Saturation through Dihadron Correlations at an Electron-Ion Collider
• Multiple scattering effects on heavy meson production in p+A collisions at backward rapidity
• Probing the small-$x$ nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC
• Study of W and Z Boson Production in Proton-Lead Collisions at the LHC with KP Nuclear Parton Distributions
• Productions of $Z^0$ and $W^{+}/W^{-}$ in Relativistic Heavy-Ion Collisions at the LHC
• Three-dimensional imaging in nuclei
• QCD resummation of dijet azimuthal decorrelations in pp and pA collisions
• Nuclear transverse momentum imbalance in the color dipole approach at the LHC regime