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Title: Scaling Phenomenology in Meson Photoproduction from CLAS

Abstract

In the high energy limit, perturbative QCD predicts that hard scattering amplitudes should follow simple scaling laws. For hard scattering at 90°, we show that experiments support this prediction even in the “medium energy” regime of 2.3 GeV<=sqrt(s)<=2.84 GeV, as long as there are no s-channel resonances present. Our data consists of high statistics measurements for five different exclusive meson photoproduction channels (pomega, peta, peta[prime], K+Lambdaand K+[summation]0) recently obtained from CLAS at Jefferson Lab. The same power-law scaling also leads to “saturated” Regge trajectories at high energies. That is, at large -t and -u, Regge trajectories must approach constant negative integers. We demonstrate the application of saturated Regge phenomenology by performing a partial wave analysis fit to the gammayp-->peta[prime]differential cross sections.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
990615
Report Number(s):
JLAB-PHY-09-1118; DOE/OR/23177-1349
TRN: US1007353
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Journal Name: AIP Conf.Proc.; Journal Volume: 1257; Journal Issue: 1-2; Conference: Hadron 2009, 29 Nov - 4 Dec 2009, Tallahassee, Florida
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DIFFERENTIAL CROSS SECTIONS; FORECASTING; HADRONS; MESONS; PARTIAL WAVES; PHOTOPRODUCTION; QUANTUM CHROMODYNAMICS; REGGE TRAJECTORIES; S CHANNEL; SCALING LAWS; SCATTERING; SCATTERING AMPLITUDES; STATISTICS

Citation Formats

Biplab Dey, Curtis A. Meyer. Scaling Phenomenology in Meson Photoproduction from CLAS. United States: N. p., 2010. Web. doi:10.1063/1.3483440.
Biplab Dey, Curtis A. Meyer. Scaling Phenomenology in Meson Photoproduction from CLAS. United States. doi:10.1063/1.3483440.
Biplab Dey, Curtis A. Meyer. Sun . "Scaling Phenomenology in Meson Photoproduction from CLAS". United States. doi:10.1063/1.3483440.
@article{osti_990615,
title = {Scaling Phenomenology in Meson Photoproduction from CLAS},
author = {Biplab Dey, Curtis A. Meyer},
abstractNote = {In the high energy limit, perturbative QCD predicts that hard scattering amplitudes should follow simple scaling laws. For hard scattering at 90°, we show that experiments support this prediction even in the “medium energy” regime of 2.3 GeV<=sqrt(s)<=2.84 GeV, as long as there are no s-channel resonances present. Our data consists of high statistics measurements for five different exclusive meson photoproduction channels (pomega, peta, peta[prime], K+Lambdaand K+[summation]0) recently obtained from CLAS at Jefferson Lab. The same power-law scaling also leads to “saturated” Regge trajectories at high energies. That is, at large -t and -u, Regge trajectories must approach constant negative integers. We demonstrate the application of saturated Regge phenomenology by performing a partial wave analysis fit to the gammayp-->peta[prime]differential cross sections.},
doi = {10.1063/1.3483440},
journal = {AIP Conf.Proc.},
number = 1-2,
volume = 1257,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 2010},
month = {Sun Aug 01 00:00:00 EDT 2010}
}

Conference:
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