A detailed study of nucleon structure function in nuclei in the valence quark region
- INFN-Laboratori, Nazionali di Frascati (Italy)
The so called {open_quotes}EMC effect{close_quotes} discovered during the 1980`s, has caused a big controversy in the community of nuclear and high energy physicists; during the last ten years, five experiments have been performed in different laboratories and several hundreds of papers about the possible interpretation of the modification of the nucleon structure function inside nuclei have been published. However, from the experimental point of view, the main goal of four experiments (EMC, BCDMS, NMC, FNAL) has been to emphasize the region of low x{sub b}, where shadowing effects appear. In the region of valence quarks and nuclear effects (x{sub b} > 0.1 - 0.2) the most reliable data presently available are from the SLAC E139 experiment performed in 1983 with only 80 hours of beam time. New precise data in the valence quark region are necessary to measure separate structure functions F{sub 2}(x{sub b}, Q{sup 2}) and R{sup lt}(x{sub b},Q{sup 2}) = {sigma}{sub l}/{sigma}{sub t}, and to investigate the real A-dependence of the ratio between bound and free-nucleon structure functions which is not completely defined by the SLAC data. Moreover, from the nuclear physics point of view, a measurement on some unexplored nuclei, like {sup 3}He and {sup 48}Ca, would be of great interest. The intermediate scaling region (0.1 < x{sub b} < 0.7) would be accessible at CEBAF if the machine energy will reach 6-8 GeV, as suggested by all the tests performed on the RF cavities. This physics program has been already presented in two letter of intents.
- Research Organization:
- Southeastern Universities Research Association, Inc., Newport News, VA (United States)
- OSTI ID:
- 232648
- Report Number(s):
- DOE/ER/40150-299; CONF-9404197-; CEBAF-R-95-001; ON: DE96001410; TRN: 96:002006-0034
- Resource Relation:
- Conference: Workshop on CEBAF at higher energies, Newport News, VA (United States), 14-16 Apr 1994; Other Information: PBD: Apr 1994; Related Information: Is Part Of Workshop on CEBAF at higher energies; Isgur, N.; Stoler, P. [eds.]; PB: 545 p.
- Country of Publication:
- United States
- Language:
- English
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