Poisson-Like Shape and Shoulder Structure of Hadron Multiplicity Distributions in e+e－ Annihilation at Z0 Energy Region

Xie Yigang; Chai Yong

Chinese Physics C> 1994, Vol. 18> Issue(9) : 778-787

Poisson-Like Shape and Shoulder Structure of Hadron Multiplicity Distributions in e⁺e^－ Annihilation at Z⁰ Energy Region

Xie Yigang ^, ,
Chai Yong

Institute of High Energy Physics, Academia Sinica, Beijing 100039

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Abstract：
The charged multiplicity distributions of hadron final states in the e⁺e^－ annihilation at the 91.2 GeV Z⁰ energy region are fitted with Poisson shape in different rapidity windows for double and single hemisphere. The multiplicities which are in Poisson-like shapes can be got according to the parameter /D and fitting qualities are compared with the results derived from the relevant theoretical models.The relationship between the Poisson-like shape and KNO scaling is discussed. The connection between the parameters expressing the deviation from the Poisson shape and non-independent particle emission and multiplicity correlation strength is analyzed. The "shoulder structure" is observed in the central rapidity region and analyzed with multi-jets by using the JADE jet analysis algorithm.

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Xie Yigang and Chai Yong. Poisson-Like Shape and Shoulder Structure of Hadron Multiplicity Distributions in e⁺e^－ Annihilation at Z⁰ Energy Region[J]. Chinese Physics C, 1994, 18(9): 778-787.

Xie Yigang and Chai Yong. Poisson-Like Shape and Shoulder Structure of Hadron Multiplicity Distributions in e⁺e^－ Annihilation at Z⁰ Energy Region[J]. Chinese Physics C, 1994, 18(9): 778-787. shu

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Received: 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

Poisson-Like Shape and Shoulder Structure of Hadron Multiplicity Distributions in e⁺e^－ Annihilation at Z⁰ Energy Region

Corresponding author: Xie Yigang,

Institute of High Energy Physics, Academia Sinica, Beijing 100039

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 1994-09-05

Abstract: The charged multiplicity distributions of hadron final states in the e⁺e^－ annihilation at the 91.2 GeV Z⁰ energy region are fitted with Poisson shape in different rapidity windows for double and single hemisphere. The multiplicities which are in Poisson-like shapes can be got according to the parameter /D and fitting qualities are compared with the results derived from the relevant theoretical models.The relationship between the Poisson-like shape and KNO scaling is discussed. The connection between the parameters expressing the deviation from the Poisson shape and non-independent particle emission and multiplicity correlation strength is analyzed. The "shoulder structure" is observed in the central rapidity region and analyzed with multi-jets by using the JADE jet analysis algorithm.

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Poisson-Like Shape and Shoulder Structure of Hadron Multiplicity Distributions in e⁺e^－ Annihilation at Z⁰ Energy Region

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Poisson-Like Shape and Shoulder Structure of Hadron Multiplicity Distributions in e⁺e^－ Annihilation at Z⁰ Energy Region

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