Parton Distributions at LHC Energies

  • At Large Hadron-Hadron Collider(LHC), the structure of nucleon at much small x region can be revealed. With the high twist modified AP evolution equation (MDAP equation), the saturation problem of partons at LHC energies is analyzed. It is found that the parton distribution will not be saturated in this region, instead, due to the high twist effects, the parton distribution is obviously suppressed and partial saturation appears. With the MDAP equation, parton distributions at LHC energies are calculated.
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  • [1] . Altarelli G, Parisi G. Nucl . Phys., 1977, B126 : 2982. CTEQ Collaboration, LAI L H et al . Eur. Phys. J ., 2000, C12 : 3753. Gluck M, Reya E, Vogt A. Eur. Phys. J ., 1998, C5 : 4614. Martin A D et al . Eur. Phys. J ., 1998, C4 : 463 ; Eur. Phys. J .,2002,C23 :735. ZHU W. Nucl . Phys., 1999, B551 :245 ; ZHU W, RUAN J H. Nucl .Phys., 1999, B559 : 3786. Gribov L V, Levin E M, Ryskin M G. Phys. Rep., 1983, 100 : 1 ;Mueller A H, QIU J W. Nucl . Phys., 1986,B268 : 4277. Mueller A H. Nucl . Phys.,1994, B415 : 373 ; 1995, B437 : 1078. Abramovsky V A, Gribov J V, Kanchels O V. Sov. J . Nucl . Phys.,1973, 18 : 5939. Eskola K J et al . Nucl . Phys., 2003, B660 : 211 ; arXiv : hep-phP0302185.10. RUAN Jian-Hong et al . HEP NP, 2000, 24 : 991 (in Chinese) ;RUAN Jian-Hong et al . China. Phys. Soc., 2002,51 : 1214 (in Chinese) ;(阮建红等. 高能物理与核物理,2000,24 : 991 ; 阮建红等. 物理学报,2002,51 : 1214)11. ZHU W, RUAN J H, YANG J F et al . Phys. Rev., 2003, D68 :094015
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LIU Hai-Yan and RUAN Jian-Hong. Parton Distributions at LHC Energies[J]. Chinese Physics C, 2004, 28(7): 706-710.
LIU Hai-Yan and RUAN Jian-Hong. Parton Distributions at LHC Energies[J]. Chinese Physics C, 2004, 28(7): 706-710. shu
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Received: 2003-12-01
Revised: 1900-01-01
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Parton Distributions at LHC Energies

    Corresponding author: LIU Hai-Yan,
  • Department of Physics,East China Normal University,Shanghai 200062,China

Abstract: At Large Hadron-Hadron Collider(LHC), the structure of nucleon at much small x region can be revealed. With the high twist modified AP evolution equation (MDAP equation), the saturation problem of partons at LHC energies is analyzed. It is found that the parton distribution will not be saturated in this region, instead, due to the high twist effects, the parton distribution is obviously suppressed and partial saturation appears. With the MDAP equation, parton distributions at LHC energies are calculated.

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