Influence of Interference Terms on Probability of Color Connections among Partons in e+e→qq+ng Process

  • Large Nc approximation is adopted in popular e+e event generators where the production probability of singlet chain states is 100% and that of color separate states is 0. In the real world Nc=3, we investigate the origin and character of color and kinematics aspects in interference terms. We find that the production probability of color singlet chain states decreases from 83%, 77% to 67%, 58% for qq+2g and qq+3g system respectively after considering the interference terms. Especially, the production probability of color separate states increases to twice of that without interference terms for qq+2g. Hence when n is larger, we can expect that the production probability of singlet chain states will be far less than 1 and that of color separate states will significantly increase when n is larger.
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  • [1] . Gustafson G .Z .Phys.,1982,C15:1552. WANG Qun,XIE QuBing,LI ShiYuan.Commun.Theor. Phys.,2000,34:4913. WANG Qun et al. Phys. Rev.,2001,D64:0120064. WANG Qun,Gosta Gustafson, XIE QuBing.Phys.Rev.,2000,D62:0540045. SHAO FengLan,XIE QuBing.HEP NP ,2001,25:710(in Chinese)(邵凤兰,谢去病.高能物理与核物理,2001,25:710)6. SHAO FengLan,XIE QuBing.HEP NP ,2002,26:779(in Chinese)(邵凤兰,谢去病.高能物理与核物理,2002,26:779)7. LI ShiYuan,SHAO FengLan,XIE QuBing et al.Phys.Rev.,2002,D65:0775038. Bjorken J D , Brodsky S J, LU HungJung. Phys.Lett.,1992,B286:1539. WANG Qun,XIE QuBing.HEP NP ,1995,19:1100(in Chinese)(王群,谢去病.高能物理与核物理,1995,19:1100)10. WANG Qun,XIE QuBing,SI ZongGuo.Phys.Lett.,1996,B388:34611. LI ShiYuan et al.Phys.Lett.,1999,B458:370;Valery A .Khoze,Torbjorn Sjostrand. Eur.Phys. J. ,1999,C6:271
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JIN Yi, XIE Qu-Bing and LI Shi-Yuan. Influence of Interference Terms on Probability of Color Connections among Partons in e+e→qq+ng Process[J]. Chinese Physics C, 2003, 27(4): 282-287.
JIN Yi, XIE Qu-Bing and LI Shi-Yuan. Influence of Interference Terms on Probability of Color Connections among Partons in e+e→qq+ng Process[J]. Chinese Physics C, 2003, 27(4): 282-287. shu
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Received: 2002-10-14
Revised: 1900-01-01
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Influence of Interference Terms on Probability of Color Connections among Partons in e+e→qq+ng Process

    Corresponding author: JIN Yi,
  • School of Physics and Microelectronics, Shandong University, Ji'nan 250100,China

Abstract: Large Nc approximation is adopted in popular e+e event generators where the production probability of singlet chain states is 100% and that of color separate states is 0. In the real world Nc=3, we investigate the origin and character of color and kinematics aspects in interference terms. We find that the production probability of color singlet chain states decreases from 83%, 77% to 67%, 58% for qq+2g and qq+3g system respectively after considering the interference terms. Especially, the production probability of color separate states increases to twice of that without interference terms for qq+2g. Hence when n is larger, we can expect that the production probability of singlet chain states will be far less than 1 and that of color separate states will significantly increase when n is larger.

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