Nuclear EMC effect through Λ¯/Λ production in semi-inclusive deep-inelastic scattering processes

Abstract

We calculate Λ andΛ hadron production cross sections in charged lepton semi-inclusive deepinelastic scattering off nuclear target (A, using iron Fe as an example) and deuteron (D) target. The results show that the ratio (Λ A /Λ A )/(Λ D /Λ D ) is sensitive to the sea quark content of the nucleus. We adopt three different models to take the nuclear EMC effect into account. The ratio (Λ A /Λ A )/(Λ D /Λ D ) is predicted to be different by these different models.

Reinterpretation of proton strangeness between ATLAS and CMS measurements

“…The dimuon data were obtained from ν µ (ν µ )A fixed target DIS process where the target is iron, whose internal structure is more complex than the free nucleon. In this process, however, the nuclear EMC effect should be taken into account as well as some nuclear corrections, see [29] and references therein. Considering the non-negligible nuclear corrections in the lepton-nuclear collision experiment, we regard pure-proton-related data, which are free of EMC effect, might have better usage in our analysis.…”

Unpolarized transverse-momentum-dependent sea quark asymmetries of light nuclei in nonperturbative QCD

“…In fact, the source of the EMC effect is the difference between the PDFs of bound and free nucleons. The EMC effect and nuclear PDFs have been studied by applying various theoretical models, such as [22,23], the cluster model [24][25][26], the deconfinement model [24,27], the pion excess model [24,[28][29][30][31][32], the rescaling model [24,[33][34][35][36] and the quark exchange model (QEM) [37,38]. In the QEM, the quarks are considered to exchange between bound nucleons in the nucleus.…”

The role of transverse momentum on the nuclear valence and sea quark distribution functions

“…In fact the EMC effect originates from an essential difference between the PDFs of free nucleons and those of the bounded ones in nucleus. Several theoretical models, such as [5,6]: the pion excess model [7][8][9][10][11][12], the deconfinement model [7,13], the a e-mail: hnematollahi@uk.ac.ir (corresponding author) quark exchange model (QEM) [14,15], the cluster model [7,16,17] and the rescaling model [7,[18][19][20][21], have been suggested to study the nuclear PDFs and describe the EMC effect, which has been measured [6] in the Drell-Yan process [7,[22][23][24][25][26], charged lepton-nucleus scattering [27][28][29][30][31][32] and neutrino-nucleus scattering processes [33][34][35][36][37][38]. We have already probed the structure of light nuclei applying the chiral quark exchange model [39] and also investigated the role of nuclear corrections on the structure function and the EMCratio of deuteron [40].…”