STRIKING REGULARITY IN MESON AND BARYON PRODUCTION-RATES IN E(+)E(-) ANNIHILATIONS

被引：31

作者：

CHLIAPNIKOV, PV

UVAROV, VA

机构：

[1] Institute for High Energy Physics

来源：

PHYSICS LETTERS B | 1995年 / 345卷 / 03期

关键词：

D O I：

10.1016/0370-2693(94)01613-H

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is shown that e(+)e(-) data on the production rates of all particles (apart from pions) belonging to the SU(3) nonets of the pseudoscalar and vector mesons and to the octet and decuplet of the baryons are determined only by particle spins, isospins and their masses. Contrary to the general belief and popular models, such as the Jetset model, the 2J + 1 spin counting factor works perfectly. The meson and baryon production rates at the Z(0) pole at LEP as a function of particle mass squared lie on the one universal curve described by a simple formula [N(particle)] = 2J + 1/2J(m) + 1 a exp(-bM(2)) with parameters a = 11.28 +/- 0.31 and b = 3.872 +/- 0.027 (GeV/c(2))(-2) and chi(2)/NDF = 15/10, where I-m is the isospin for baryons or the modified isospin I-m for mesons introduced in this paper. A similar universal dependence with the same value of the slope b is observed at PETRA and PEP energies.

引用

页码：313 / 320

页数：8

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