6
Yasuo MIAKE, Univ. of Tsukuba
p-/ p+ ratios
•Low pt, same numbers of pions produced from gluons and quarks, while at high pt, only (u,d) quark jet contributes.
– pp;
•Saturates at 0.5 (nd/nu of p)
–Au+Au;
•Saturates at 1.14 (nd/nu of Au nuclei)
•Change due to the parton energy loss is small in pions because of smaller contributions from gluons.
