Nuclear effects and their interplay in nuclear deeply virtual Compton scattering amplitudes

A. Freund, Mark Strikman

Research output: Contribution to journalArticle

Abstract

In this paper we analyze nuclear medium effects on deeply virtual Compton scattering (DVCS) amplitudes in the [Formula Presented] range of [Formula Presented] for a large range of [Formula Presented] and four different nuclei. We use our nucleon generalized parton distribution model capable of describing all currently available DVCS data on the proton and extend it to the nuclear case using two competing parametrizations of nuclear effects. The two parametrizations, though giving different absolute numbers, yield the same type and magnitude of effects for the imaginary and real parts of the nuclear DVCS amplitude. The imaginary part shows stronger nuclear shadowing effects compared to the inclusive case, i.e., [Formula Presented], whereas in the real part nuclear shadowing at small [Formula Presented] and antishadowing at large [Formula Presented] combine through evolution to yield an even greater suppression than in the imaginary part up to large values of [Formula Presented]. This is the first time that such a combination of nuclear effects has been observed in a hadronic amplitude. The experimental implications will be discussed in a subsequent publication.

Original languageEnglish (US)
Number of pages1
JournalPhysical Review C - Nuclear Physics
Volume69
Issue number1
DOIs
StatePublished - Jan 1 2004

Fingerprint

scattering amplitude
partons
retarding
nuclei
protons
scattering

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

@article{491be1a9c7744d3d9823418da9238332,
title = "Nuclear effects and their interplay in nuclear deeply virtual Compton scattering amplitudes",
abstract = "In this paper we analyze nuclear medium effects on deeply virtual Compton scattering (DVCS) amplitudes in the [Formula Presented] range of [Formula Presented] for a large range of [Formula Presented] and four different nuclei. We use our nucleon generalized parton distribution model capable of describing all currently available DVCS data on the proton and extend it to the nuclear case using two competing parametrizations of nuclear effects. The two parametrizations, though giving different absolute numbers, yield the same type and magnitude of effects for the imaginary and real parts of the nuclear DVCS amplitude. The imaginary part shows stronger nuclear shadowing effects compared to the inclusive case, i.e., [Formula Presented], whereas in the real part nuclear shadowing at small [Formula Presented] and antishadowing at large [Formula Presented] combine through evolution to yield an even greater suppression than in the imaginary part up to large values of [Formula Presented]. This is the first time that such a combination of nuclear effects has been observed in a hadronic amplitude. The experimental implications will be discussed in a subsequent publication.",
author = "A. Freund and Mark Strikman",
year = "2004",
month = "1",
day = "1",
doi = "10.1103/PhysRevC.69.015203",
language = "English (US)",
volume = "69",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
number = "1",

}

Nuclear effects and their interplay in nuclear deeply virtual Compton scattering amplitudes. / Freund, A.; Strikman, Mark.

In: Physical Review C - Nuclear Physics, Vol. 69, No. 1, 01.01.2004.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Nuclear effects and their interplay in nuclear deeply virtual Compton scattering amplitudes

AU - Freund, A.

AU - Strikman, Mark

PY - 2004/1/1

Y1 - 2004/1/1

N2 - In this paper we analyze nuclear medium effects on deeply virtual Compton scattering (DVCS) amplitudes in the [Formula Presented] range of [Formula Presented] for a large range of [Formula Presented] and four different nuclei. We use our nucleon generalized parton distribution model capable of describing all currently available DVCS data on the proton and extend it to the nuclear case using two competing parametrizations of nuclear effects. The two parametrizations, though giving different absolute numbers, yield the same type and magnitude of effects for the imaginary and real parts of the nuclear DVCS amplitude. The imaginary part shows stronger nuclear shadowing effects compared to the inclusive case, i.e., [Formula Presented], whereas in the real part nuclear shadowing at small [Formula Presented] and antishadowing at large [Formula Presented] combine through evolution to yield an even greater suppression than in the imaginary part up to large values of [Formula Presented]. This is the first time that such a combination of nuclear effects has been observed in a hadronic amplitude. The experimental implications will be discussed in a subsequent publication.

AB - In this paper we analyze nuclear medium effects on deeply virtual Compton scattering (DVCS) amplitudes in the [Formula Presented] range of [Formula Presented] for a large range of [Formula Presented] and four different nuclei. We use our nucleon generalized parton distribution model capable of describing all currently available DVCS data on the proton and extend it to the nuclear case using two competing parametrizations of nuclear effects. The two parametrizations, though giving different absolute numbers, yield the same type and magnitude of effects for the imaginary and real parts of the nuclear DVCS amplitude. The imaginary part shows stronger nuclear shadowing effects compared to the inclusive case, i.e., [Formula Presented], whereas in the real part nuclear shadowing at small [Formula Presented] and antishadowing at large [Formula Presented] combine through evolution to yield an even greater suppression than in the imaginary part up to large values of [Formula Presented]. This is the first time that such a combination of nuclear effects has been observed in a hadronic amplitude. The experimental implications will be discussed in a subsequent publication.

UR - http://www.scopus.com/inward/record.url?scp=85035290226&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85035290226&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.69.015203

DO - 10.1103/PhysRevC.69.015203

M3 - Article

AN - SCOPUS:85035290226

VL - 69

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 1

ER -