Systematic analysis method for color transparency experiments

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.1104· OSTI ID:6075968

Jain, P; Ralston, J P ^[1]

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1. Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas 66045-2151 (United States)

We introduce a data analysis procedure for color transparency experiments which is considerably less model dependent than the transparency ratio method. The new method is based on fitting the shape of the [ital A] dependence of the nuclear cross section at fixed momentum transfer to determine the effective attenuation cross section for hadrons propagating through the nucleus. The procedure does not require assumptions about the hard scattering rate inside the nuclear medium. Instead, the hard scattering rate is deduced directly from the data. Some theoretical input is necessary in modeling the attenuation due to the nuclear medium, for which we use a simple exponential law. We apply this procedure to the Brookhaven experiment of Carroll [ital et] [ital al]. and find that it clearly shows color transparency: the effective attenuation cross section in events with momentum transfer squared [ital Q][sup 2] is approximately 40 mb (2.2 GeV[sup 2]/[ital Q][sup 2]). The fit to the data also supports the idea that the hard scattering inside the nuclear medium is closer to perturbative QCD predictions than is the scattering of isolated protons in free space. We also discuss the application of the new analysis method to electroproduction experiments.

• DOE Contract Number: FG02-85ER40214
• OSTI ID: 6075968
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:3; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
662340 -- Hadron Interactions-- (1992-)
663430 -- Nucleon-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATTENUATION
BARYON-BARYON INTERACTIONS
COLOR
CROSS SECTIONS
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
MOMENTUM TRANSFER
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES