The Drell-Yan nuclear modification due to the nuclear effects of nPDFs and initial-state parton energy loss

Abstract

By globally analyzing nuclear Drell-Yan data including all incident energies, the nuclear effects of nPDFs and initial-state parton energy loss are investigated. Based on Landau-Pomeranchuk-Migdal (LPM) regime, the calculations are carried out by means of the analytic parametrizations of quenching weights derived from the Baier-Dokshitzer-Mueller-Peign$\acute{e}$-Schiff (BDMPS) formalism and using the new EPPS16 nPDFs. It is found that the results are in good agreement with the data and the role of the energy loss effect on the suppression of Drell-Yan ratios is prominent, especially for low-mass Drell-Yan measurements. The nuclear effects of nPDFs becomes more obvious with the nuclear mass number A, the same as the energy loss effect. By global fit, the transport coefficient extracted is $\hat{q}=0.26\pm 0.04$ GeV${}^2$/fm. In addition, to avoid diminishing the QCD NLO correction on the data form of Drell-Yan ratios, the separate calculations about the Compton differential cross section ratios $R_{Fe(W)/C}(x_F)$ at 120GeV are performed, which provides a feasible way to better distinguish the gluon energy loss in Compton scattering. It is found that the role of the initial-state gluon energy loss on the suppression of Compton scattering rations is not very important and becomes disappear with the increase of $x_F$.

arXiv commentIt is to be published in Chinese Physics C

References in corpus (24)

• Radiative energy loss and $p_{\perp }$-broadening of high energy partons in nuclei
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• EPPS16: Nuclear parton distributions with LHC data
• nCTEQ15 - Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Jet quenching in high-energy heavy-ion collisions
• Nuclear parton distributions at next to leading order
• Quenching of hadron spectra in media
• Scale evolution of nuclear parton distributions
• Pionic Parton Distributions Revisited
• Determination of nuclear parton distributions
• Parton energy loss limits and shadowing in Drell-Yan dimuon production
• An improved global analysis of nuclear parton distribution functions including RHIC data
• Multiple Parton Scattering in Nuclei: Modified DGLAP Evolution for Fragmentation Functions
• Energy losses in a hot plasma revisited
• Heavy-ion collisions at the Large Hadron Collider: a review of the results from Run 1
• Tomography of cold and hot QCD matter : tools and diagnosis
• Energy Loss versus Shadowing in the Drell-Yan Reaction on Nuclei
• Constraints on quark energy loss from Drell-Yan data
• Parton Energy Loss and Modified Beam Quark Distribution Functions in Drell-Yan Process in p+A Collisions
• Partonic Energy Loss and the Drell-Yan Process
• Coherent medium-induced gluon radiation in hard forward $1\to 1$ partonic processes
• Initial-state energy loss in cold QCD matter and the Drell-Yan process
• Systematic analysis of the incoming quark energy loss in cold nuclear matter

Cited by in corpus (2)

• Nuclear parton distribution functions with uncertainties in a general mass variable flavor number scheme
• A systematic study of initial state quark energy loss in fixed target proton nucleus collision