共查询到2条相似文献,搜索用时 0 毫秒
1.
《Physics letters. [Part B]》1998,440(3-4)
The mechanism of baryon-anti-baryon pair production in e+e− annihilation into hadrons has been studied using the TOPAZ detector at the TRISTAN e+e− collider at an average center-of-mass energy of 58 GeV. The distributions of various
correlations were compared with two prominent models: the cluster-fragmentation model and the string-fragmentation model. We rejected the cluster-fragmentation model at the 90% C.L. Furthermore, in the context of the string-fragmentation model, we favor the “popcorn” model, rejecting the “diquark” model, where a diquark is considered to be a fundamental entity, at the 95% C.L. 相似文献
2.
Gideon Alexander 《Physics letters. [Part B]》2004,590(3-4):126-132
The nearly energy independent hadron emitter dimension r, measured in e+e− annihilation in the energy range 10 to 91 GeV via the Bose–Einstein correlation of two identical charged pions, is shown to be well accounted for by choosing the hadron jets as independent pion sources. To this end the known normalised factorial cumulant moments dependence on particle sources is adapted to the Bose–Einstein correlation formalism to yield a relation between r and these sources. This approach is also able to account for the measured r values obtained for the Z0 decays into two and three hadron jets. Finally the estimated r value of the hadronic (9.46) decay via three gluons is expected to be higher by about 6 to 11% over that predicted for its one photon hadronic decay mode. 相似文献