scholarly journals Examining the EMC effect using the F2n neutron structure function

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
H. Szumila-Vance ◽  
C. E. Keppel ◽  
S. Escalante ◽  
N. Kalantarians
Keyword(s):  
Structure Function ◽  
Neutron Structure ◽  
Emc Effect

Neutron structure function and deuteron EMC effect

1991 ◽  
Vol 530 (3-4) ◽  
pp. 555-570 ◽  
Author(s):  
K. Nakano ◽  
S.S.M. Wong
Keyword(s):  
Structure Function ◽  
Neutron Structure ◽  
Emc Effect

scholarly journals Leading twist moments of the neutron structure function

2006 ◽  
Vol 766 ◽  
pp. 142-171 ◽  
Author(s):  
M. Osipenko ◽  
W. Melnitchouk ◽  
S. Simula ◽  
S. Kulagin ◽  
G. Ricco
Keyword(s):  
Structure Function ◽  
Neutron Structure

The evolution of partons in the nuclear medium and the EMC effect

1992 ◽  
Vol 70 (2-3) ◽  
pp. 114-118
Author(s):  
Jianjun Yang ◽  
Yabo Zhu ◽  
Hongqing Shen ◽  
Guanglie Li ◽  
Jianping Shen
Keyword(s):  
Structure Function ◽  
Nuclear Structure ◽  
Motion Correction ◽  
Momentum Conservation ◽  
Evolution Model ◽  
Nuclear Medium ◽  
Dynamical Mechanism ◽  
Fermi Motion ◽  
Shadowing Effect ◽  
Emc Effect

In this paper, we present the parton evolution model and describe the dynamical mechanism of the EMC effect. The ratio of the average nuclear structure function of the nucleus 56Fe to the deuteron structure function is calculated by considering the shadowing effect and the Fermi-motion correction with nuclear momentum conservation. We find that the dynamical mechanism of the EMC effect is the evolution of a parton in the nuclear medium.

scholarly journals Neutron structure function moments at leading twist

2007 ◽  
Author(s):  
M. Osipenko ◽  
S. Simula ◽  
S. Kulagin ◽  
G. Ricco ◽  
Keyword(s):  
Structure Function ◽  
Neutron Structure

scholarly journals QCD AND QED DYNAMICS IN THE EMC EFFECT

2012 ◽  
Vol 21 (04) ◽  
pp. 1230002 ◽  
Author(s):  
LEONID FRANKFURT ◽  
MARK STRIKMAN
Keyword(s):  
Structure Function ◽  
Degrees Of Freedom ◽  
Experimental Studies ◽  
Momentum Conservation ◽  
Light Nuclei ◽  
Heavy Nuclei ◽  
Fermi Motion ◽  
Nucleon Wave Function ◽  
Emc Effect ◽  
Bjorken X

Applying exact QCD sum rules for the baryon charge and energy–momentum conservation we demonstrate that if the only degrees of freedom in nuclei were nucleons, the structure function of a nucleus would be the additive sum of the nucleon distributions at the same Bjorken x = AQ2/2(pA⋅q)≤0.5 up to very small Fermi motion corrections if 1/2mN x is significantly less than the nucleus radius. Hence QCD implies that the proper quantity to reveal violation of the additivity due to presence of nonnucleonic degrees of freedom in nuclei is the ratio RA(x, Q2) = (2/A)F2A(x, Q2)/F2D(x, Q2). Use of variable xp = Q2/2q0mp in the experimental studies instead of x leads to the deviation of RA(xp, Q2) from one even if the nucleus would consist only of nucleons with small momenta. Implementation of QCD dynamics accounts in the case of the light nuclei for at least a half of the deviation of RA(xp, Q2) from one for x≤0.55. In the case of heavy nuclei account of the QCD dynamics and of light-cone momentum fraction carried by Fermi, Weizsacker, Williams equivalent photons are responsible for ≈ one half the deviation of RA(x, Q2) from one at x≤0.55. We argue that direct observation of large and predominantly nucleonic short-range correlations (SRCs) in nuclei impacts strongly on the understanding of the EMC effect for x≥0.6 posing a serious challenge for most of the proposed models of the EMC effect. The data are consistent with a scenario in which the hadronic EMC effect reflects suppression of rare quark–gluon configurations in nucleons belonging to SRC appears to be the only viable. The dynamic realization of this scenario is presented in which quantum fluctuations of the nucleon wave function with x≥0.5 parton have a weaker interaction with nearby nucleons, leading to suppression of such configurations in bound nucleons and to the significant suppression of nucleon Fermi motion effects at x≥0.55 giving a right magnitude of the EMC effect. Implications of discussed effects for the analyses of the neutron structure function and nuclear parton distributions are presented. The directions for the future studies and challenging questions are outlined.

scholarly journals NUCLEAR SHADOWING IN INCLUSIVE AND TAGGED DEUTERON STRUCTURE FUNCTIONS AND EXTRACTION OF $F_2^p-F_2^n$ AT SMALL x FROM ELECTRON–DEUTERON COLLIDER DATA

2006 ◽  
Vol 21 (01) ◽  
pp. 23-40 ◽  
Author(s):  
L. FRANKFURT ◽  
V. GUZEY ◽  
M. STRIKMAN
Keyword(s):  
Structure Function ◽  
Structure Functions ◽  
Final State ◽  
Neutron Structure ◽  
The Future ◽  
Final State Interactions ◽  
Small X

We review predictions of the theory of leading twist nuclear shadowing for inclusive unpolarized and polarized deuteron structure functions [Formula: see text], [Formula: see text] and [Formula: see text] and for the tagged deuteron structure function [Formula: see text]. We analyze the possibility to extract the neutron structure function [Formula: see text] from electron–deuteron data and demonstrate that an account of leading twist nuclear shadowing leads to large corrections for the extraction of [Formula: see text] from the future deuteron collider data both in the inclusive and in the tagged structure function modes. We suggest several strategies to address the extraction of [Formula: see text] and to measure at the same time the effect of nuclear shadowing via the measurement of the distortion of the proton spectator spectrum in the semi-inclusive eD → e′NX process. We address the issue of the final state interactions in the eD → e′NX process and examine how they affect the extraction of [Formula: see text].

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