Chinese Physics C > 2001, Vol. 25 > Issue(1): 6-10

Angular Asymmetry of Multiplicity in High Energy e⁺e^－Annihilation to Three Jet Events

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

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Abstract：
A model,which treats three initial parlous as two color singlets and then both of them fragment independently into hadrons, is employed to study the angular dependence of charged multiplicity distribution in e+ e- annihilation into three-jet events at LEP energy region. The calculated results show a distinguished dependence of charged multiplicity to topology structure of events, and also agree well with experiment data from ALEPH collaboration.

References

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ALEPH Collab,Buskulic D et al. Phys. Lett., 1995, B346 (4): 389–398; DELPHI Collab, Abreu P et al. Z. Phys.,1996,C70(1): 179–186;OPAL Collab,Alexander G et al. Phys. Lett., 1991,B265(4):462–4742 ALEPH Collab Arate R et al. Z. Phys., 1997,C76(1): 191–199 3 LIU Xi–Ming,WANG Qun. Chinese Science Bulletin, 1991,36(19): 1610–1613 4 Rowson O C,Trilling G H et al. Phys. Rev. Lett., 1985,54(24):2580–2583;Kisselev A v,Petrov v A,YushchenkoO P. Z. Phys., 1988,C41(3): 521–5255 Schumm B A,Dokshitzer Y L,Khoze V A. Phys. Rev. Lett., 1992,69(21):3025–3028;Petrov V A, Kisselev A V.Z. Phys., 1995,C66(2): 453–4576 Gustafson G. Phys. Lett., 1986,B175(4): 453–456; Gustafson G. Nucl. Phys., 1993,B392(1): 251–278; AnderB, Dahlqvist P, Gustafson G. Phys. Lett., 1988, B214 (4 ): 604–608; Gustafson G. Nucl. Phys., 1988, B306 (4):746–758 7 LIU Xi–Ming,WANG Qun,XIE Qu–Bing. HEP NP, 1998,22(8):699–702 (in Chinese)(刘希明,王群,谢去病.高能物理与核物理,1998,22(8):699-702) 8 Gustafson G,Petterson U. Nucl. Phys., 1988,B306(4):746–7569 Ioffe B L. Phys. Lett., 1978,B78(3):277–280 10 Azimov Y I,Dokshitzer Y L,Khoze V A et al. Z. Phys., 1985,C27(1 ): 65–7211 Schumm B A et al. Phys. Rev. Lett., 1992,69(21 ): 3025–3028

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WANG Yong-Gang, LIU Xi-Ming and ZHOU Jian-Jun. Angular Asymmetry of Multiplicity in High Energy e ⁺e ^－Annihilation to Three Jet Events[J]. Chinese Physics C, 2001, 25(1): 6-10.

WANG Yong-Gang, LIU Xi-Ming and ZHOU Jian-Jun. Angular Asymmetry of Multiplicity in High Energy e ⁺e ^－Annihilation to Three Jet Events[J]. Chinese Physics C, 2001, 25(1): 6-10. shu

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Received: 1999-12-01
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

Angular Asymmetry of Multiplicity in High Energy e⁺e^－Annihilation to Three Jet Events

Corresponding author:WANG Yong-Gang,

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

Received Date:1999-12-01
Accepted Date:1900-01-01
Available Online:2001-01-05

Abstract:A model,which treats three initial parlous as two color singlets and then both of them fragment independently into hadrons, is employed to study the angular dependence of charged multiplicity distribution in e+ e- annihilation into three-jet events at LEP energy region. The calculated results show a distinguished dependence of charged multiplicity to topology structure of events, and also agree well with experiment data from ALEPH collaboration.