Status and hadron physics program of J-PARC

K Ozawa,A Wrońska,C Guaraldo,St Kistryn,R Skibiński,H Ströher

doi:10.1051/epjconf/20123701005

Abstract

Current status and hadron physics programs of Japan Accelerator Research Complex (J-PARC) are reported. Several physics programs are proposed at the Hadron Hall of J-PARC. Strangeness and hyper nuclear physics is undertaken at K1.8 beam line. Study of meson nucleon bound system is underway at K1.8BR beam line. After the earth- quake, all beam line components and experimental setups are reassembled. Protons are successfully accelerated in the last December and hadron physics experiments are re- sumed in this February. In this manuscript, status of on-going experiment and near future plans of such physics programs are reported. Especially, a new beam line for a primary protons and high momentum secondary particles is proposed to study meson properties in nucleus.

Highlights

Protons are successfully accelerated in the last December and hadron physics experiments are resumed in this February
Many experiments related to hadron physics are being performed and proposed at the Hadron Hall of Japan Accelerator Research Complex (J-PARC)
The primary protons are delivered to the production target which is placed at the front of the hall and produce several secondary particles

Summary

Introduction

Many experiments related to hadron physics are being performed and proposed at the Hadron Hall of Japan Accelerator Research Complex (J-PARC). The main purpose of these beam lines is kaon beam experiments and the beam lines have a good K/π separation ability. Charged particle beam lines, called K1.1 and K1.1BR, have relatively short length and have great benefits for low momentum kaon beam to suppress in-flight decays of kaon. In addition to these beam lines for secondary particles, one beam line for primary protons is being prepared. Small fraction of primary protons are separated at upstream of the main beam line and delivered to the hadron hall for experimental use directly.

Pentaquark

Kaon Bound States

Mesons in Nucleus

Vector Meson Mass in Nucleus

Summary