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Title: Probing short-range nucleon-nucleon interactions with an electron-ion collider

Abstract

For this research, we derive the cross section for exclusive vector meson production in high-energy deeply inelastic scattering off a deuteron target that disintegrates into a proton and a neutron carrying large relative momentum in the final state. This cross section can be expressed in terms of a novel gluon transition generalized parton distribution (T-GPD); the hard scale in the final state makes the T-GPD sensitive to the short-distance nucleon-nucleon interaction. We perform a toy model computation of this process in a perturbative framework and discuss the time scales that allow the separation of initial- and final-state dynamics in the T-GPD. We outline the more general computation based on the factorization suggested by the toy computation: In particular, we discuss the relative role of “pointlike” and “geometric” Fock configurations that control the parton dynamics of short-range nucleon-nucleon scattering. With the aid of exclusive J/ψ production data at the Hadron-Electron Ring Accelerator at DESY, as well as elastic nucleon-nucleon cross sections, we estimate rates for exclusive deuteron photodisintegration at a future Electron-Ion Collider (EIC). Our results, obtained using conservative estimates of EIC integrated luminosities, suggest that center-of-mass energies sNN ~12GeV2 of the neutron-proton subsystem can be accessed. We argue that themore » high energies of the EIC can address outstanding dynamical questions regarding the short-range quark-gluon structure of nuclear forces by providing clean gluon probes of such “knockout” exclusive reactions in light and heavy nuclei.« less

Authors:
 [1];  [2];  [3]
  1. Univ. of Washington, Seattle, WA (United States). Department of Physics
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department; Heidelberg Univ. (Germany). Inst. for Theoretische Physik
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1336044
Alternate Identifier(s):
OSTI ID: 1246177
Report Number(s):
BNL-112264-2016-JA
Journal ID: ISSN 2469-9985; KB0301020
Grant/Contract Number:  
SC0012704; FG02-97ER41014; FG02-97ER-41014
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 93; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
APS
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Miller, Gerald A., Sievert, Matthew D., and Venugopalan, Raju. Probing short-range nucleon-nucleon interactions with an electron-ion collider. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.93.045202.
Miller, Gerald A., Sievert, Matthew D., & Venugopalan, Raju. Probing short-range nucleon-nucleon interactions with an electron-ion collider. United States. doi:10.1103/PhysRevC.93.045202.
Miller, Gerald A., Sievert, Matthew D., and Venugopalan, Raju. Thu . "Probing short-range nucleon-nucleon interactions with an electron-ion collider". United States. doi:10.1103/PhysRevC.93.045202. https://www.osti.gov/servlets/purl/1336044.
@article{osti_1336044,
title = {Probing short-range nucleon-nucleon interactions with an electron-ion collider},
author = {Miller, Gerald A. and Sievert, Matthew D. and Venugopalan, Raju},
abstractNote = {For this research, we derive the cross section for exclusive vector meson production in high-energy deeply inelastic scattering off a deuteron target that disintegrates into a proton and a neutron carrying large relative momentum in the final state. This cross section can be expressed in terms of a novel gluon transition generalized parton distribution (T-GPD); the hard scale in the final state makes the T-GPD sensitive to the short-distance nucleon-nucleon interaction. We perform a toy model computation of this process in a perturbative framework and discuss the time scales that allow the separation of initial- and final-state dynamics in the T-GPD. We outline the more general computation based on the factorization suggested by the toy computation: In particular, we discuss the relative role of “pointlike” and “geometric” Fock configurations that control the parton dynamics of short-range nucleon-nucleon scattering. With the aid of exclusive J/ψ production data at the Hadron-Electron Ring Accelerator at DESY, as well as elastic nucleon-nucleon cross sections, we estimate rates for exclusive deuteron photodisintegration at a future Electron-Ion Collider (EIC). Our results, obtained using conservative estimates of EIC integrated luminosities, suggest that center-of-mass energies sNN ~12GeV2 of the neutron-proton subsystem can be accessed. We argue that the high energies of the EIC can address outstanding dynamical questions regarding the short-range quark-gluon structure of nuclear forces by providing clean gluon probes of such “knockout” exclusive reactions in light and heavy nuclei.},
doi = {10.1103/PhysRevC.93.045202},
journal = {Physical Review C},
number = 4,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}

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