DIS on Light Nuclei with Spectator Tagging: New Applications at Intermediate and Small x
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
An Electron-Ion Collider would enable next-generation measurements of DIS on light nuclei (deuteron, 3He, ...) with detection of nucleons and fragments in the nuclear fragmentation region ("spectator tagging"). Such measurements allow one to control the nuclear configuration during the high-energy process and could greatly advance our understanding in several areas of partonic structure and QCD: (a) precision measurements of neutron structure functions (including spin) in electron-deuteron scattering with proton tagging, eliminating nuclear binding through on-shell extrapolation in the recoil proton momentum; (b) controlled studies of the nuclear modifications of quark and gluon densities (EMC effect, anti-shadowing), using the recoil momentum dependence to control the size of nuclear configurations; (c) novel studies of coherence and nuclear shadowing at x << 0.1 using tagged DIS. We present an overview of the physics applications of spectator tagging at intermediate and small x and comment on theoretical challenges and experimental requirements. We report about results of an R&D project aiming to demonstrate the feasibility of spectator tagging with EIC and quantify the physics impact.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1969621
- Report Number(s):
- JLAB-THY-15-2272; DOE/OR/23177-6022
- Journal Information:
- EPJ Web Conf., Vol. 112, Issue 06; Conference: 6th International Conference on Physics Opportunities at an Electron-Ion Collider (POETIC 2015) : Palaiseau, France, September 7-11, 2015
- Country of Publication:
- United States
- Language:
- English
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