Study on the Energy Dependence of the Source Size of Jets by the HBT Correlation Method in $e^+e^-$ Collisions

Chen Zheng-Yu, Chen Gang, Wang Mei-Juan, Xie Yi-Long, Liang Zhu
2014 Acta Physica Polonica B  
The energy dependence of the radii size of jets are studied in detail by the HBT correlation method using Monte Carlo Simulation generator Jetset7.4 to produce 40,000,000 events of e$^+$e$^-$ collisions at $\sqrt s =30$, 50, 70, 91.2, 110, 130, 150 and 170 GeV. The radii of jets are measured using the HBT correlation method with the indistinguishability of identical final state pions. It is found that the average radii of quark-jets and gluon-jets are independent of the c.m. energy of
more » ... energy of e$^+$e$^-$ collisions. The average radius of quark-jets are obviously larger than that of gluon-jets. The invariable average radii of quark-jets and gluon-jets in e$^+$e$^-$ collisions are obtained at the end of parton evolvement.
doi:10.5506/aphyspolb.45.1089 fatcat:jznciztqvzeyldraw5sos7c6hy