Nuclear medium modification of the structure function

Athar, M. Sajjad; Simó, I. Ruiz; Vacas, M. J. Vicente

doi:10.1016/j.nuclphysa.2011.03.008

Cited by 26 publications

(72 citation statements)

References 47 publications

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“…In the following, we sketch the most important features, assumptions and approximations of the semiphenomenological model for the self-energy developed in Ref. [22], and successfully used to describe several inclusive nuclear reactions [20,25,27,29,30,[33][34][35][36][37]. Within this model, the non relativistic nucleon self-energy in isospin-symmetric nuclear matter is computed starting from the low-density theorems.…”

Section: Nucleon Density Response and Sfs In The Lfg Approachmentioning

confidence: 99%

Scaling within the spectral function approach

et al. 2018

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Scaling features of the nuclear electromagnetic response functions unveil aspects of nuclear dynamics that are crucial for interpretating neutrino-and electron-scattering data. In the large momentumtransfer regime, the nucleon-density response function defines a universal scaling function, which is independent of the nature of the probe. In this work, we analyze the nucleon-density response function of 12 C, neglecting collective excitations. We employ particle and hole spectral functions obtained within two distinct many-body methods, both widely used to describe electroweak reactions in nuclei. We show that the two approaches provide compatible nucleon-density scaling functions that for large momentum transfers satisfy first-kind scaling. Both methods yield scaling functions characterized by an asymmetric shape, although less pronounced than that of experimental scaling functions. This asymmetry, only mildly affected by final state interactions, is mostly due to nucleon-nucleon correlations, encoded in the continuum component of the hole SF.

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Section: Nucleon Density Response and Sfs In The Lfg Approachmentioning

confidence: 99%

Scaling within the spectral function approach

et al. 2018

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“…We have added the mesonic contributions to the nucleonic contribution to get the full result. It should be mentioned that all the parameters entering in the above mentioned equations have been fixed by our earlier [57,58] works and have not been taken as free parameters. We have used CTEQ parameterization [80] for the quark/antiquark PDFs for nucleon and the quark/antiquark parameterization for pion from the works of Gluck et al [83].…”

Section: Resultsmentioning

confidence: 99%

“…This leads to an increase in the interaction probability of virtual photons with the meson cloud. The effect of meson cloud is more pronounced in heavier nuclear targets and dominate in the intermediate region of x(0.2<x<0.6) which leads to an enhancement of nuclear structure function F A 1,2 [57]. To obtain the contribution from the virtual mesons, we again evaluate lepton self energy and for this a diagram similar to the one shown in Fig.2 is drawn, except that instead of a nucleon now there is a meson which results in the change of a nucleon propagator by a meson propagator.…”

Section: A Mesonic Contributionsmentioning

confidence: 99%

Nuclear medium effects in structure functions of nucleon at moderate Q2

et al. 2015

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Recent experiments performed on inclusive electron scattering from nuclear targets have measured the nucleon electromagnetic structure functions F1(x, Q 2 ), F2(x, Q 2 ) and FL(x, Q 2 ) in 12 C, 27 Al, 56 F e and 64 Cu nuclei. The measurements have been done in the energy region of 1 GeV 2 < W 2 < 4 GeV 2 and Q 2 region of 0.5 GeV 2 < Q 2 < 4.5 GeV 2 . We have calculated nuclear medium effects in these structure functions arising due to the Fermi motion, binding energy, nucleon correlations, mesonic contributions from pion and rho mesons and shadowing effects. The calculations are performed in a local density approximation using a relativistic nucleon spectral function which includes nucleon correlations. The numerical results are compared with the recent experimental data from JLab and also with some earlier experiments.

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“…Once the spectral function is normalized to the number of nucleons and we obtain the correct binding energy, there is no free parameter that is left in our model. In the case of nucleus, the nuclear hadronic tensor W µν A for an isospin symmetric nucleus is derived to be [31,32]:…”

Section: Nuclear Effectsmentioning

confidence: 99%

“…and D ρ (p) in Eq. ( 25) are fixed by fitting experimental data on F i 2 (x t ) in DIS on various nuclei[32,35]. (3) We have also included shadowing effect following the works of Kulagin and Petti[8].…”

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Nuclear medium effects in Drell–Yan process

Haider

Athar

Singh

et al. 2017

J. Phys. G: Nucl. Part. Phys.

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We study the nuclear medium effects in Drell-Yan process using quark parton distribution functions calculated in a microscopic nuclear model which takes into account the effects of Fermi motion, nuclear binding and nucleon correlations through a relativistic nucleon spectral function. The contributions of π and ρ mesons as well as shadowing effects are also included. The beam energy loss is calculated using a phenomenological approach. The present theoretical results are compared with the experimental results of E772 and E886 experiments. These results are applicable to the forthcoming experimental analysis of E906 Sea Quest experiment at Fermi Lab.

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Nuclear medium modification of the structure function

Cited by 26 publications

References 47 publications

Scaling within the spectral function approach

Scaling within the spectral function approach

Nuclear medium effects in structure functions of nucleon at moderate Q2

Nuclear medium effects in Drell–Yan process

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