KNN system with chiral dynamics

Journal Article · Fri Jul 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.015209· OSTI ID:21596614

Bayar, M; Yamagata-Sekihara, J; Oset, E ^[1]

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1. Instituto de Fisica Corpuscular (centro mixto CSIC-UV) Institutos de Investigacion de Paterna, Aptdo. 22085, E-46071, Valencia, Spain and Department of Physics, Kocaeli University, 41380 Izmit (Turkey)

We have performed a calculation of the scattering amplitude for the three-body system KNN assuming K scattering against a NN cluster using the fixed center approximation to the Faddeev equations. The KN amplitudes, which we take from chiral unitary dynamics, govern the reaction and we find a KNN amplitude that peaks around 40 MeV below the KNN threshold, with a width in |T|{sup 2} of the order of 50 MeV for spin 0 and has another peak around 27 MeV with similar width for spin 1. The results are in line with those obtained using different methods but implementing chiral dynamics. The simplicity of the approach allows one to see the important ingredients responsible for the results. In particular, we show the effects from the reduction of the size of the NN cluster due to the interaction with the K and those from the explicit consideration of the {pi}{Sigma}N channel in the three-body equations.

• OSTI ID: 21596614
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 84; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANGULAR MOMENTUM
APPROXIMATIONS
BARYON-BARYON INTERACTIONS
BOSONS
CALCULATION METHODS
CHIRALITY
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
FADDEEV EQUATIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
KAONS
MANY-BODY PROBLEM
MESONS
MEV RANGE
MEV RANGE 10-100
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
SCATTERING
SCATTERING AMPLITUDES
SPIN
STRANGE MESONS
STRANGE PARTICLES
THREE-BODY PROBLEM