Scale for the Production of Jets in High Energy e<SUP>+</SUP>e<SUP>－</SUP> Collisions

LIN Xiao-Yan; LIU Lian-Shou

Chinese Physics C> 2003, Vol. 27> Issue(1) : 7-11

Scale for the Production of Jets in High Energy e⁺e^－ Collisions

LIN Xiao-Yan ,
LIU Lian-Shou ^,

Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

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Abstract：
The scale for visible jets produced in e⁺e^－ Collisions is studied in some details using Monte Carlo method. It is demonstrated, based on the historical fact that the 3-jet events were firstly observed in e+ e- experiments at √S=17—30GeV,and the relative transverse momentum for visible jets is in the region k_t,～5—10GeV/c. It is further shown, using a concrete example, that the number of jets in an event could be correctly evaluated only when k_t is in this region. The dynamical fluctuations inside jets determined through different values of k_t are compared carefully. It turns out that only when k_t,～5—10GeV/c the dynamical fluctuations inside jets will possess the best anomalous scaling property. The relation between the scale 5-10GeV/c of visible jets and the scale 1-2GeV of perturbative QCD is discussed.

References

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Sterman G, Weinberg S. Phys. Rev. Lett.1977,39:14362 Dokshitzer Yu L. J Phys. 1991,617:15373 Ali A, Barreiro F. Jets in Annihilatio and QCD. In:Eds. Ali A,Soding P. High Energy Electron-Positron Physics. Singapore; World Sci-entific.1988. 612-6944 Hanson G et al. Phys. Rev. Lett., 1975,35:16095 Brandelik R et al (TASSO Coll.)Phys. Lett., 1979 , B86 : 243 ; Barber D. P(Mark J Coll.).Phys . Rev . Lett ., 1979, 43: 830; Berger Ch et al(PLUTO Coll.).Phys. Lett., 1979 , B86 : 418 ; Bartel W et al ( JADE Coll.). Phys. Lett.,1980,B91:L426 Dokshitzer Yu L,Leder G D,Moretti S et al. JHEP,1997,08;0017 Sjtistrand. Comp. Phys. Comm., 1992,67:4658 LIU Lian-Shou, CHEN Gang, FU Jing-Hua. Phys. Rev., 2001, D63:osaoo29 ZHANG Kun-Shi, YIN Jian-Wu, CHEN Gang et al. HEPNP,2002,:ls8(m Chinese);ZHANG Kun-Shi.CHEN Gang.YU Mei-Iang et al. A Monte Carlo Study on the Dynamical Fluctuations Inside Quark and An-tiquark Jets. HEP-ph/0203098(张昆实, 尹建武, 陈刚等.高能物理与核物理, 2002.26:1S8)10 LIU Lian-Shou. Phase Space Partition in High Energy Collisions, HEP- PH/020400311 Bjorken J D. Geometry of Multihadron Production, Proc. XXN Intem.Symp. on Multiparticle Dynamics, Vietri sul Mare, 1994, Eds. A. Gio-vannini et al. Singapore;World Scientific,199s.57912 Bialas A,Peschanski R. Nucl. Phys., 1986,B273:703;1988,308:85713 Ochs W.Z. Phys., 1991, C50; 339; Bialas A, Gazdzichi M. Phys. Lett ., 1990,B252:483

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LIN Xiao-Yan and LIU Lian-Shou. Scale for the Production of Jets in High Energy e⁺e^－ Collisions[J]. Chinese Physics C, 2003, 27(1): 7-11.

LIN Xiao-Yan and LIU Lian-Shou. Scale for the Production of Jets in High Energy e⁺e^－ Collisions[J]. Chinese Physics C, 2003, 27(1): 7-11. shu

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Received: 2002-04-25
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

Scale for the Production of Jets in High Energy e⁺e^－ Collisions

LIN Xiao-Yan
LIU Lian-Shou ^,

Corresponding author: LIU Lian-Shou,

Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

Received Date: 2002-04-25
Accepted Date: 1900-01-01
Available Online: 2003-01-05

Abstract: The scale for visible jets produced in e⁺e^－ Collisions is studied in some details using Monte Carlo method. It is demonstrated, based on the historical fact that the 3-jet events were firstly observed in e+ e- experiments at √S=17—30GeV,and the relative transverse momentum for visible jets is in the region k_t,～5—10GeV/c. It is further shown, using a concrete example, that the number of jets in an event could be correctly evaluated only when k_t is in this region. The dynamical fluctuations inside jets determined through different values of k_t are compared carefully. It turns out that only when k_t,～5—10GeV/c the dynamical fluctuations inside jets will possess the best anomalous scaling property. The relation between the scale 5-10GeV/c of visible jets and the scale 1-2GeV of perturbative QCD is discussed.