M.Sc. Seminar II

Oral presentation in Seminar II 3/2552

Topic : Effective Antikaon-Nucleon interaction based on chiral SU(3) dynamics
Speaker : Rintarn Saengsai (m5110186)
Place : NSRC Seminar Room, Suranaree University of Technology.
Date : 4 March 2010

SUT  Physics

Seminar II
Speaker: Rintarn  Saengsai                                                                    Date: 4 March 2010    
Student ID: M5110186                                                                            Place: NSRC Seminar Room

Effective Antikaon-Nucleon interaction based on chiral SU(3) dynamics
                    SU(3) dynamics. In this work is refined into the chiral coupled-channel approach, where the interaction is determined by chiral SU(3) symmetry of QCD. The experimental data of K^-p scattering are well reproduced in threshold. The effective single-channel Antikaon-Nucleon interaction been derive based on chiral SU(3). An equivalent local Antikaon-Nucleon potential are construct with a Gaussian coordinate space, when the range parameter is adjusted so as to reproduce the position of the Antikaon-Nucleon quasibound state [1]. In my thesis we have derived the dynamical equations for the coupled-channel Antikaon-Nucleon system. The cross section of the reaction Antikaon-Nucleon --> Antikaon-Nucleon are evaluated with one of the famous phenomenological Antikaon-Nucleon potentials. We use a method of coupled-channel Lippmann-Schwinger (LS) equations which allows us to evaluate the l = 0 amplitudes and obtain the cross sections at low energies plus the properties of the Lambda(1405) resonance. In our approach, we change only the potential in the LS equations until we get better versions of Antikaon-Nucleon potentials satisfied with the cross section in experimental data.

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[3] T. Yamazaki and Y. Akaishi, Phys. Rev. C 76, 045201 (2007).
[4] N. V. Shevchenko, A. Gal and J. Mares, Phys. Rev. Lett. 98, 082301 (2007).
[5] J. K. Kim, Phys. Rev. Lett. 14, 1 (1965).