What do we know about the [ital Q][sup 2] evolution of the Gerasimov-Drell-Hearn sum rule

Conference · Sat Dec 05 00:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6442207

Burkert, V ^[1]; Li, Z ^[2]

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1. Continuous Electron Beam Accelerator Facility, Newport News, VA. 23606 (United States)
2. Physics Department, Virigina Polytechnic Insitute and State University, Blacksburg, VA 24601 (United States)

We study contributions from baryon resonance excitations to the [ital Q][sup 2] dependence of the Gerasimov-Drell-Hearn sum rule. The results indicate that the sum rule at small [ital Q][sup 2] is largely saturated by contribution from the lower mass resonant states. We find a strong [ital Q][sup 2] dependence of the resonant contributions, leading even to a sign change of the sum rule integral at [ital Q][sup 2][similar to]0.8 GeV[sup 2]. The global [ital Q][sup 2] dependence indicates discrepencies to the interpretation of the EMC polarized structure function data on [ital A][sup [ital p]][sub 1] in the resonance region, which can be largely attributed to the elimination of the [ital P][sub 33](1232) resonance from the EMC analysis.

• OSTI ID: 6442207
• Report Number(s): CONF-9206203-; CODEN: APCPCS
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 269:1; Conference: 1992 Continuous Electron Beam Accelerator Facility (CEBAF) summer workshop, Newport News, VA (United States), 15-19 Jun 1992; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
43 PARTICLE ACCELERATORS
BARYONS
SUM RULES
ELECTROPRODUCTION
EMC EFFECT
MAGNETIC MOMENTS
N-1440 BARYONS
PHOTON-PROTON INTERACTIONS
PHOTOPRODUCTION
PROTONS
STRUCTURE FUNCTIONS
TOTAL CROSS SECTIONS
BASIC INTERACTIONS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FUNCTIONS
HADRONS
INTERACTIONS
N BARYONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
662330* - Photon & Charged-Lepton Interactions with Hadrons- (1992)
430100 - Particle Accelerators- Design
Development
& Operation