What do we know about the Q{sup 2} evolution of the Gerasimov-Drell-Hearn sum rule?
Abstract
We study contributions from baryon resonance excitations to the Q{sup 2} dependence of the Gerasimov-Drell-Hearn sum rule. The results indicate that the sum rule at small Q{sup 2} is largely saturated by contribution from the lower mass resonant states. We find a strong Q{sup 2} dependence of the resonant contributions, leading even to a sign change of the sum rule integral at Q{sup 2} {approx_equal} O.8GeV{sup 2}. The global Q{sup 2} dependence indicates discrepancies to the interpretation of the EMC polarized structure function data on A{sub 1}{sup p} in the resonance region, which can be largely attributed to the elimination of the P{sub 33}(1232) resonance from the EMC analysis.
- Authors:
-
- Continuous Electron Beam Accelerator Facility, Newport News, VA (United States)
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
- Publication Date:
- Research Org.:
- Southeastern Universities Research Association, Inc., Newport News, VA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10185974
- Report Number(s):
- DOE/ER/40150-200; CEBAF-PR-92-017
ON: DE93000828
- DOE Contract Number:
- AC05-84ER40150
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; SUM RULES; STRUCTURE FUNCTIONS; QUARK MODEL; PROTONS; SPIN; CROSS SECTIONS; M1-TRANSITIONS; 662410; PROPERTIES OF BARYONS AND BARYON RESONANCES
Citation Formats
Burkert, V, and Li, Z. What do we know about the Q{sup 2} evolution of the Gerasimov-Drell-Hearn sum rule?. United States: N. p., 1992.
Web.
Burkert, V, & Li, Z. What do we know about the Q{sup 2} evolution of the Gerasimov-Drell-Hearn sum rule?. United States.
Burkert, V, and Li, Z. 1992.
"What do we know about the Q{sup 2} evolution of the Gerasimov-Drell-Hearn sum rule?". United States.
@article{osti_10185974,
title = {What do we know about the Q{sup 2} evolution of the Gerasimov-Drell-Hearn sum rule?},
author = {Burkert, V and Li, Z},
abstractNote = {We study contributions from baryon resonance excitations to the Q{sup 2} dependence of the Gerasimov-Drell-Hearn sum rule. The results indicate that the sum rule at small Q{sup 2} is largely saturated by contribution from the lower mass resonant states. We find a strong Q{sup 2} dependence of the resonant contributions, leading even to a sign change of the sum rule integral at Q{sup 2} {approx_equal} O.8GeV{sup 2}. The global Q{sup 2} dependence indicates discrepancies to the interpretation of the EMC polarized structure function data on A{sub 1}{sup p} in the resonance region, which can be largely attributed to the elimination of the P{sub 33}(1232) resonance from the EMC analysis.},
doi = {},
url = {https://www.osti.gov/biblio/10185974},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 1992},
month = {Thu Oct 01 00:00:00 EDT 1992}
}
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