Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate
Abstract
We consider electron-deuteron deep-inelastic scattering (DIS) with detection of a proton in the nuclear fragmentation region ("spectator tagging") as a method for extracting the free neutron structure functions and studying their nuclear modifications. Such measurements could be performed at a future Electron-Ion Collider (EIC) with suitable forward detectors. The measured proton recoil momentum (≲ 100 MeV in the deuteron rest frame) specifies the deuteron configuration during the high-energy process and permits a controlled theoretical treatment of nuclear effects. Nuclear and nucleonic structure are separated using methods of light-front quantum mechanics. The impulse approximation (IA) to the tagged DIS cross section contains the free neutron pole, which can be reached by on-shell extrapolation in the recoil momentum. Final-state interactions (FSI) distort the recoil momentum distribution away from the pole. In the intermediate-x region 0.1 < x < 0.5 FSI arise predominantly from interactions of the spectator proton with slow hadrons produced in the DIS process on the neutron (rest frame momenta ≲1 GeV, target fragmentation region). We construct a schematic model describing this effect, using final-state hadron distributions measured in nucleon DIS experiments and low-energy hadron scattering amplitudes. We investigate the magnitude of FSI, their dependence on the recoil momentum (angularmore »
- Authors:
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1429942
- Alternate Identifier(s):
- OSTI ID: 1430042
- Report Number(s):
- JLAB-THY-17-2488; DOE/OR/-23177-4160; arXiv:1706.02244
Journal ID: ISSN 2469-9985; PRVCAN; 035209
- Grant/Contract Number:
- AC05-06OR23177; FG02-93ER40771
- Resource Type:
- Published Article
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Name: Physical Review C Journal Volume: 97 Journal Issue: 3; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Strikman, M., and Weiss, C. Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x. United States: N. p., 2018.
Web. doi:10.1103/PhysRevC.97.035209.
Strikman, M., & Weiss, C. Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x. United States. https://doi.org/10.1103/PhysRevC.97.035209
Strikman, M., and Weiss, C. Tue .
"Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x". United States. https://doi.org/10.1103/PhysRevC.97.035209.
@article{osti_1429942,
title = {Electron-deuteron deep-inelastic scattering with spectator nucleon tagging and final-state interactions at intermediate x},
author = {Strikman, M. and Weiss, C.},
abstractNote = {We consider electron-deuteron deep-inelastic scattering (DIS) with detection of a proton in the nuclear fragmentation region ("spectator tagging") as a method for extracting the free neutron structure functions and studying their nuclear modifications. Such measurements could be performed at a future Electron-Ion Collider (EIC) with suitable forward detectors. The measured proton recoil momentum (≲ 100 MeV in the deuteron rest frame) specifies the deuteron configuration during the high-energy process and permits a controlled theoretical treatment of nuclear effects. Nuclear and nucleonic structure are separated using methods of light-front quantum mechanics. The impulse approximation (IA) to the tagged DIS cross section contains the free neutron pole, which can be reached by on-shell extrapolation in the recoil momentum. Final-state interactions (FSI) distort the recoil momentum distribution away from the pole. In the intermediate-x region 0.1 < x < 0.5 FSI arise predominantly from interactions of the spectator proton with slow hadrons produced in the DIS process on the neutron (rest frame momenta ≲1 GeV, target fragmentation region). We construct a schematic model describing this effect, using final-state hadron distributions measured in nucleon DIS experiments and low-energy hadron scattering amplitudes. We investigate the magnitude of FSI, their dependence on the recoil momentum (angular dependence, forward/backward regions), their analytic properties, and their effect on the on-shell extrapolation. We comment on the prospects for neutron structure extraction in tagged DIS with EIC. Finally, we discuss possible extensions of the FSI model to other kinematic regions (large/small x). In tagged DIS at x << 0.1 FSI resulting from diffractive scattering on the nucleons become important and require separate treatment.},
doi = {10.1103/PhysRevC.97.035209},
journal = {Physical Review C},
number = 3,
volume = 97,
place = {United States},
year = {Tue Mar 27 00:00:00 EDT 2018},
month = {Tue Mar 27 00:00:00 EDT 2018}
}
https://doi.org/10.1103/PhysRevC.97.035209
Web of Science
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