Article

# Tomography of nuclear matter: Comparing Drell-Yan with deep inelastic scattering data

ECT and INFN, G.C. di Trento, Strada delle Tabarelle, 286 38050 Villazzano Trento, Italy

Nuclear Physics A (Impact Factor: 1.53). 01/2003; DOI: 10.1016/S0375-9474(02)01537-3 Source: arXiv

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**ABSTRACT:**We study incoherent DVCS on 4He in the reaction, which probes possible medium-modifications of the bound nucleon GPDs and elastic form factors. Assuming that the bound nucleon GPDs are modified in proportion to the corresponding bound nucleon elastic form factors, as predicted in the quark–meson coupling model, we develop an approach to calculate various incoherent nuclear DVCS observables. As an example, we compute the beam-spin DVCS asymmetry, and predict the xB- and t-dependence of the ratio of the bound to free proton asymmetries, . We find that the deviation of from unity is as much as ∼6%.Physics Letters B 06/2008; · 4.57 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**Journal articlePhys. Rev. Lett. 96(2006),162301. 01/2006; - [Show abstract] [Hide abstract]

**ABSTRACT:**Semi-Inclusive DIS (SIDIS) of high energy leptons on nuclear targets has been used to study the nuclear medium modification of the quark fragmentation function. The possible interpretations and the implications on the parton energy loss are discussed. The first measurement of double-hadron production in deep-inelastic scattering within the nuclear medium is also presented. Nuclear effects on the additional hadron are clearly observed, but with little or no difference among nitrogen, krypton or xenon, and with smaller magnitude than effects seen on previously measured single-hadron multiplicities. The data are compared with models based on partonic energy loss or pre-hadronic scattering, and with a model based on a purely absorptive treatment of the final state interactions. Thus, the double-hadron ratio provides an additional tool for studying modifications of hadronization in nuclear matter.Nuclear Physics A - NUCL PHYS A. 01/2007; 783(1):93-100.

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