Kaons and Antikaons in Multi-Phase Transport Model

Abstract

We investigate the impact of medium modifications of kaons and antikaons on there rapidity distribution and production ratio using A Multi-Phase transport (AMPT) model. The medium modified masses of kaons and antikaons, which are used as input in AMPT model, are calculated using the chiral SU(3) mean field model. Usually in chiral SU(3) models along with the Weinberg Tomozawa term, the contribution of explicit symmetry breaking term and three range terms are considered to evaluate in-medium masses of kaons and antikaons. In the present work, we have considerd Weinberg Tomozawa term and two range terms to study their impact on the above listed experimental observables. The repulsive contribution to the mass of K + meson from the Weinberg term dominates over the attractive contribution from two range terms. For the K − meson Weinberg term as well as two range terms give attractive contribution. Considering all these features from chiral effective model on properties of K + and K − mesons, we explore the rapidity distributions of kaons and antikaons.