Speaker
Dr
Pornrad Srisawad
(Department of Physics, Faculty of Science, Naresuan University, 65000 Phitsanulok Thailand)
Description
The inclusive cross section, polar angle distribution and the direct transverse momentum of K+ mesons in C + C, Ni + Ni and Au + Au collisions at incident energies from 0.6 to 2.0 A GeV are studied using the Quantum Molecular Dynamics model based on the covariant kaon dynamics, and compared with the KaoS data of GSI. The calculated K+ yields consist with experiment data for a soft and hard nuclear equation of state (compression modulus K = 200 , 380 MeV respectively) when including the in-medium K+ potential (its value at saturation density is ). The experimental data for the polar distribution of Au + Au collisions at 1.5 A GeV and Ni + Ni collisions at 1.93 A GeV are slightly more forward/back than theoretical predicts and rather flat. The direct transverse momentum of K+ mesons in Ni + Ni collisions at 1.93 A GeV is not obviously affected by the in-medium K+ potential.
Summary
The calculated inclusive cross sections of K+ mesons in C + C, Ni + Ni and Au + Au collisions at incident energies from 0.6A to 2.0A GeV using Quantum Molecular Dynamics model are consistent with the experiment KaoS data when including the in-medium K+N potential. The experimental data for the polar distribution of Au + Au collisions at 1.5 A GeV and Ni + Ni collisions at 1.93 A GeV are slightly more forward/back than theoretical predicts and rather flat. The sensitivity of the direct transverse momentum of K+ mesons in Ni + Ni collisions at 1.93 A GeV on the in-medium K+ potential is weak .
Authors
Dr
Ayut Limphirat
(School of Physics, Suranaree University of Technology, 3000 Nakhon Ratchasima, Thailand)
Ms
Kristiya Tomuang
(Department of Physics, Faculty of Science, Naresuan University, 65000 Phitsanulok Thailand)
Ms
Pavadee Boonthus
(Department of Physics, Faculty of Science, Naresuan University, 65000 Phitsanulok Thailand.)
Ms
Sukanya Sombun
(Department of Physics, Faculty of Science, Naresuan University, 65000 Phitsanulok Thailand.)
Mr
Ukrit Chaimongkon
(School of Science, University of Phayao, 56000 Phayao, Thailand)
Prof.
Yu-Ming Zheng
(China Institute of Atomic Energy, P.O. Box 275(18),102413 Beijing, China)
Prof.
Yu-peng Yan
(School of Physics, Suranaree University of Technology, 3000 Nakhon Ratchasima, Thailand.)
Co-author
Dr
Pornrad Srisawad
(Department of Physics, Faculty of Science, Naresuan University, 65000 Phitsanulok Thailand)
