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Title: Dynamical model of antishadowing of the nuclear gluon distribution

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 5; Related Information: CHORUS Timestamp: 2017-05-30 22:11:05; Journal ID: ISSN 2469-9985
American Physical Society
Country of Publication:
United States

Citation Formats

Frankfurt, L., Guzey, V., and Strikman, M. Dynamical model of antishadowing of the nuclear gluon distribution. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.95.055208.
Frankfurt, L., Guzey, V., & Strikman, M. Dynamical model of antishadowing of the nuclear gluon distribution. United States. doi:10.1103/PhysRevC.95.055208.
Frankfurt, L., Guzey, V., and Strikman, M. 2017. "Dynamical model of antishadowing of the nuclear gluon distribution". United States. doi:10.1103/PhysRevC.95.055208.
title = {Dynamical model of antishadowing of the nuclear gluon distribution},
author = {Frankfurt, L. and Guzey, V. and Strikman, M.},
abstractNote = {},
doi = {10.1103/PhysRevC.95.055208},
journal = {Physical Review C},
number = 5,
volume = 95,
place = {United States},
year = 2017,
month = 5

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This content will become publicly available on May 30, 2018
Publisher's Accepted Manuscript

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Cited by: 2works
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  • In this paper, the forms of the gluon distribution function at different Q/sup 2/ are discussed with the aid of the three quark model and the dynamical calculations of QCD (the leading logarithm approximation). The Buras-Gaemers parametrization is improved and the gluon distribution function obtained can be parametrized by the simple parameter form xG(x,Q/sup 2/) = xG/sub 1/(x,Q/sup 2/) +xG/sub 2/(x,Q/sup 2/) = (1+B(s))/sub 2/ (1-x)/sup /(s)) +(1+D(s)) (1-x)/sup D/(s). The form satisfies the QCD evolution equation and does not contradict evidently the existing experimental data. The properties of the gluon content in a nucleon are analyzed on this basis.more » The result indicates that the gluon distribution function can be considered as consisting of two different parts: a soft component and a hard component.« less
  • We study the impact of the nuclear dependence of R=\sigma_L/\sigma_T on the extraction of the F_2^A/F_2^D and F_1^A/F_1^D structure function ratios from the data on the \sigma^A/\sigma^D cross section ratios. Guided by indications of the nuclear dependence of R from the world data, we examine selected sets of EMC, BCDMS, NMC and SLAC data and find that F_1^A/F_1^D < \sigma^A/\sigma^D \leq F_2^A/F_2^D. In particular, we observe that the nuclear enhancement (antishadowing) for F_1^A/F_1^D in the interval 0.1 < x < 0.3 becomes significantly reduced or even disappears, which indicates that antishadowing is dominated by the longitudinal structure function F_L. Wemore » also argue that precise measurements of nuclear modifications of R and F_L^A have the potential to constrain the poorly known gluon distribution in nuclei over a wide range of x.« less
  • The shadowing and antishadowing of nuclear structure functions in the Gribov-Glauber picture is due to the destructive and constructive interference of amplitudes arising from the multiple-scattering of quarks in the nucleus, respectively. The diffractive contributions to deep inelastic scattering includes Pomeron and Odderon contributions from multi-gluon exchange as well as Reggeon quark-exchange contributions. The coherence of multi-step nuclear processes leads to shadowing and antishadowing of the electromagnetic nuclear structure functions in agreement with measurements. This picture also leads to substantially different antishadowing for charged and neutral current reactions, thus affecting the extraction of the weak-mixing angle {theta}W. The fact thatmore » Reggeon couplings depend on the quantum numbers of the struck quark implies non-universality of nuclear antishadowing for charged and neutral currents as well as a dependence of antishadowing on the polarization of the beam and target. The implications of hidden color degrees of freedom in the nuclear wavefunction is also briefly discussed.« less
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  • Based on the multiple scattering series incorporated in the Faddeev scheme the high-energy limit of the total n+d cross section is evaluated in a nonrelativistic model system where spins are neglected. In contrast to the naive expectation that the total n+d scattering cross section is the sum of two NN cross sections we find two additional effects resulting from rescattering processes. These additional terms have different signs (shadowing and antishadowing) and a different behavior as function of the energy. Our derivation of these results which are already known from Glauber theory is based on the analytical evaluation of elastic transitionmore » amplitudes in the high-energy limit. It does not depend on the diffraction-type assumptions connected with Glauber theory. In this model of spinless Yukawa type forces (with no absorption) the total n+d cross section does not approach twice the NN total cross section in the high-energy limit but rather approaches the total NN cross section multiplied by a number larger than 2. Therefore, the enhancement effect resulting from rescattering is larger than the shadowing effect, which decreases faster with energy. thinsp {copyright} {ital 1998} {ital The American Physical Society}« less