5
Yasuo MIAKE, Univ. of Tsukuba
Jet Quench via Flavor Dependence
•Gluons in
QCD stronger interaction than quarks
–Gluon density in nucleon larger in small x
– sgg > sqq
–Larger energy loss of gluons than that of quarks
•dEq/dx ~ 1 GeV/fm
•dEg/dx ~ 2 GeV/fm
•At high pt,
some particles are fragmented more from
gluon than quark jet.
–Gluon jets fragment into same number of particles and anti-particles.
–Gluon jets produce more particles ; softer distr.
•Effect of jet qunching can be seen in particle ratios.
PRC58(98)2321
Nucl.Phys
B420(94)583
PRD51(95)3436