QCD Factorization for Semi-inclusive Deep-Inelastic Scattering at Low Transverse Momentum

  • We argue a factorization formula for semi-inclusive deep-inelastic scattering with hadrons in the current fragmentation region detected at low transverse momentum. To facilitate the factorization, we introduce the transverse-momentum dependent parton distributions and fragmentation functions with gauge links slightly off the light-cone, and with soft-gluon radiations subtracted. We verify the factorization to one-loop order in perturbative quantum chromodynamics and argue that it is valid to all orders in perturbation theory.
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  • [1] . JI X D, MA J P, YUAN F. Phys. Rev., 2005, D71: 034005.hep-ph/04041832. JI X D, MA J P, YUAN F. Phys. Lett., 2004, B597: 299-308. hep-ph/04050853. JI X D, MA J P, YUAN F. JHEP, 2005, 0507: 020. hep-ph/0503015
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JI Xiang-Dong, MA Jian-Ping and YUAN Feng. QCD Factorization for Semi-inclusive Deep-Inelastic Scattering at Low Transverse Momentum[J]. Chinese Physics C, 2007, 31(9): 857-859.
JI Xiang-Dong, MA Jian-Ping and YUAN Feng. QCD Factorization for Semi-inclusive Deep-Inelastic Scattering at Low Transverse Momentum[J]. Chinese Physics C, 2007, 31(9): 857-859. shu
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Received: 2007-04-25
Revised: 1900-01-01
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QCD Factorization for Semi-inclusive Deep-Inelastic Scattering at Low Transverse Momentum

    Corresponding author: MA Jian-Ping,
  • Department of Physics, University of Maryland, College Park, Maryland 20742, USA2 Institute of Theoretical Physics, CAS, Beijing 100080, China

Abstract: We argue a factorization formula for semi-inclusive deep-inelastic scattering with hadrons in the current fragmentation region detected at low transverse momentum. To facilitate the factorization, we introduce the transverse-momentum dependent parton distributions and fragmentation functions with gauge links slightly off the light-cone, and with soft-gluon radiations subtracted. We verify the factorization to one-loop order in perturbative quantum chromodynamics and argue that it is valid to all orders in perturbation theory.

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