The dependence of the emission size on the hadron mass

被引：29

作者：

Alexander, G ^{[1
]}

Cohen, I ^{[1
]}

Levin, E ^{[1
]}

机构：

[1] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

PHYSICS LETTERS B | 1999年 / 452卷 / 1-2期

关键词：

Bose and Fermi correlations; emission radius; hadron mass; uncertainty principle; QCD;

D O I：

10.1016/S0370-2693(99)00257-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The size of the emission volume of pions and kaons, r(pi pi) and r(KK), were measured in the hadronic Z(0) decays through the two-pion and two-kaon Bose-Einstein correlations near threshold. Recently the emitter size of the two identical baryons, Lambda Lambda (<(Lambda)over bar><(Lambda)over bar>), was evaluated from the dependence of the fraction of the spin S = 1 state on the energy near threshold where it is affected by the Pauli exclusion principle. Here we show that the r dependence on the particle masses, namely the hierarchy r(pi pi) > r(KK) > r(Lambda Lambda) observed in the Z(0) hadronic decays, is well described in terms of the Heisenberg uncertainty principle. A good description can also be obtained via the virial theorem when applied to a general QCD potential. Other available approaches are also discussed. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：159 / 166

页数：8

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