Fragmentation Character of Resonance Events in BEPC e<SUP>+</SUP>e<SUP>－</SUP> Annihilation

LIU Xi-Ming; ZHANG Xue-Yao; WANG Hai-Long; WANG Yu-Shui

Chinese Physics C> 2002, Vol. 26> Issue(6) : 557-562

Fragmentation Character of Resonance Events in BEPC e⁺e^－ Annihilation

Department of Physics,Shandong University,Ji′nan 250100,China

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Abstract：
In this paper an important character was found that the final hadron multiplicities of direct J/ψ decays satisfy the same universal mass dependence as that in e⁺e^－→q₀q₀ continuum events. This indicates that the fragmentation of quark and gluon to hadron follows the same mechanism. We give a reasonable interpretation to final baryon multiplicity that is enhanced by 2.5 times in direct Y decays compared to the continuum through our calculating results. But we cannot find this similar phenomenon in direct J/ψ decays.

References

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LIU Xi-Ming, ZHANG Xue-Yao, WANG Hai-Long and WANG Yu-Shui. Fragmentation Character of Resonance Events in BEPC e⁺e^－ Annihilation[J]. Chinese Physics C, 2002, 26(6): 557-562.

LIU Xi-Ming, ZHANG Xue-Yao, WANG Hai-Long and WANG Yu-Shui. Fragmentation Character of Resonance Events in BEPC e⁺e^－ Annihilation[J]. Chinese Physics C, 2002, 26(6): 557-562. shu

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Received: 2001-07-25
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Fragmentation Character of Resonance Events in BEPC e⁺e^－ Annihilation

Corresponding author: LIU Xi-Ming,

Department of Physics,Shandong University,Ji′nan 250100,China

Received Date: 2001-07-25
Accepted Date: 1900-01-01
Available Online: 2002-06-05

Abstract: In this paper an important character was found that the final hadron multiplicities of direct J/ψ decays satisfy the same universal mass dependence as that in e⁺e^－→q₀q₀ continuum events. This indicates that the fragmentation of quark and gluon to hadron follows the same mechanism. We give a reasonable interpretation to final baryon multiplicity that is enhanced by 2.5 times in direct Y decays compared to the continuum through our calculating results. But we cannot find this similar phenomenon in direct J/ψ decays.