Scaling and resonances in elementary K{sup +{Lambda}} photoproduction

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.025207· OSTI ID:21499444

Schumacher, R A ^[1]; Sargsian, M M ^[2]

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1. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
2. Department of Physics, Florida International University, Miami, Florida 33199 (United States)

Recent cross-section data for the reaction {gamma}+p{yields}K{sup +}+{Lambda} are examined for evidence of scaling in both the low-t Regge domain and in the high-{radical}(s) and -t domain where constituent counting may apply. It is shown that the reaction does scale in both regimes. At large center-of-mass angles, s{sup -7} scaling appears to hold at essentially all -t but with angle-dependent oscillations. The scaled data show particularly strong evidence for s-channel resonances for -t below 2 GeV{sup 2} and for W below about 2.3 GeV. The dominant contributions are consistent with an N{sup *}S{sub 11} resonance at 1690 MeV, a P{sub 13} resonance at 1920 MeV, and a D{sub 13} resonance at 2100 MeV, which interfere to give the observed strong angular dependence.

• OSTI ID: 21499444
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BARYONS
BASIC INTERACTIONS
BOSONS
CENTER-OF-MASS SYSTEM
CROSS SECTIONS
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GAMMA RADIATION
GEV RANGE
GEV RANGE 01-10
HADRONS
INTERACTIONS
IONIZING RADIATIONS
KAONS
KAONS PLUS
MESONS
NUCLEONS
OSCILLATIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTOPRODUCTION
PROTONS
PSEUDOSCALAR MESONS
RADIATIONS
RESONANCE
S CHANNEL
SCALING
STRANGE MESONS
STRANGE PARTICLES