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The characters of the angular distributions of quark jets and gluon jets withdifferent flavors are carefully studied after introducing the cone angle ofjets. The quark jets and gluon jets are identified from the 3-jet events whichare produced by Monte Carlo simulation Jetset7.4 in e+e- collisions at $\sqrts$=91.2GeV. It turns out that the ranges of angular distributions of gluon jetsare obviously wider than that of quark jets at the same energies. The averagecone angles of gluon jets are much larger than that of quark jets. As themultiplicity or the transverse momentum increases, the cone-angle distributionwithout momentum weight of both the quark jet and gluon jet all increases, i.ethe positive linear correlation are present, but the cone-angle distributionwith momentum weight decreases at first, then increases when n > 4 or p_t > 2GeV. The characters of cone angular distributions of gluon jets produced byquarks with different flavors are the same, while there are obvious differencesfor that of the quark jets with different flavors.

Comparison of the Geometrical Characters Inside Quark- and Gluon-jet Produced by Different Flavor Quarks