The energy loss and nuclear absorption effects in semi-inclusive deep inelastic scattering on nucleus

Abstract

Semi-inclusive deep inelastic lepton-nucleus scattering provides a good opportunity to investigate the cold nuclear effects on quark propagation and hadronization. Considering the nuclear modification of the quark energy loss and nuclear absorption effects in final state, the leading-order computations on hadron multiplicity ratios for both hadronization occurring outside and inside the medium are performed with the nuclear geometry effect of the path length L of the struck quark in the medium. By fitting the HERMES two-dimensional data on the multiplicity ratios for positively and negatively charged pions and kaons produced on neon, the hadron-nucleon inelastic cross section s h for different identified hadrons is determined, respectively. It is found that our predictions obtained with the analytic parameterizations of quenching weights based on BDMPS formalism and the nuclear absorption factor n ( ) N z, A are in good agreement with the experimental measurements. This indicates that the energy loss and nuclear absorption are the main nuclear effects inducing a reduction of the hadron yield for quark hadronization occurring outside and inside the nucleus, respectively.

Observation of Azimuth-Dependent Suppression of Hadron Pairs in Electron Scattering off Nuclei

“…Studying how hadronization occurs inside large nuclei provides a way to perturb the process to potentially reveal its mechanisms and timescales [1][2][3][4]. It also represents a way to probe the transport properties of particles through nuclei [5][6][7][8][9][10][11][12], and tune models needed to interpret neutrino experiments [13,14].…”

The study of the incoming parton energy loss effect on the NLO nuclear Drell–Yan ratios

“…Because of the static features of the cold nuclear matter in hadron-nucleus collisions, the study of the energy loss effect of quarks and gluons when propagating through the cold nuclear medium is simpler. This study can reveal the properties of medium-induced gluon radiation and is important to understand the features of the radiative energy loss in the hot QCD matter [3][4][5].…”

The study of gluon energy loss in cold nuclear matter from J / ψ production

“…We find it interesting that the mod-ified parton distribution functions and parton energy loss effect can describe the J/ψ suppression measured in p-A collisions when a high-energy J/ψ is formed long after the nucleus . Consequently, following our previous work on the parton energy loss effect in cold nuclear matter [14][15][16], we present a phenomenological approach based on the assumption that the observed J/ψ suppression is mainly induced by nuclear PDF effects and the energy loss effects of incoming quarks, gluons, and the color octets cc. By utilizing the Salgado-Wiedemann (SW) quenching weights [17], we will separately investigate the incident quark energy loss, the incident gluon energy loss, and the color octet cc energy loss by comparing the E866 [6,7], LHC [10,11], and RHIC [12] experimental data.…”