Multiple parton scattering in nuclei: gauge invariance
arXiv:0805.4030 · doi:10.1016/j.nuclphysa.2008.11.009
Abstract
Within the framework of a generalized collinear factorization for multiple parton scattering in nuclear medium, twist-4 contributions to DIS off a large nucleus can be factorized as a convolution of hard parts and two-parton correlation functions. The hard parts for the quark scattering in the light-cone gauge correspond to interaction with a transverse (physical) gluon in the target, while they are given by the second derivative of the cross section with a longitudinal gluon in the covariant gauge. We provide a general proof of the equivalence of the hard parts in the light-cone and covariant gauge. We further demonstrate the equivalence in calculations of twist-4 contributions to semi-inclusive cross section of DIS in both lowest order and next leading order. Calculations of the nuclear transverse momentum broadening of the struck quark in the light-cone and covariant gauge are also discussed.
23 pages with 4 figures
References in corpus (23)
- Suppression of Hadrons with Large Transverse Momentum in Central Au+Au Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV
- Disappearance of back-to-back high hadron correlations in central Au+Au collisions at = 200 GeV
- Multiple Parton Scattering in Nuclei: Parton Energy Loss
- Final state interactions and gauge invariant parton distributions
- Multiple Scattering, Parton Energy Loss and Modified Fragmentation Functions in Deeply Inelastic eA Scattering
- Parton Distributions in Light-Cone Gauge: Where Are the Final-State Interactions?
- Jet Tomography of Hot and Cold Nuclear Matter
- Jet Quenching and Radiative Energy Loss in Dense Nuclear Matter
- Hadron Formation in Deep-Inelastic Positron Scattering in a Nuclear Environment
- Twist-3 Formalism for Single Transverse Spin Asymmetry Reexamined: Semi-Inclusive Deep Inelastic Scattering
- Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation
- Single spin asymmetries from a gluonic background in the Drell-Yan process
- Higher twist jet broadening and classical propagation
- The Transverse-momentum-dependent Parton Distribution Function and Jet Transport in Medium
- Multiple Parton Scattering in Nuclei: Quark-quark Scattering
- Multiple Parton Scattering in Nuclei: Heavy Quark Energy Loss and Modified Fragmentation Functions
- Multiple Parton Scattering in Nuclei: Twist-Four Nuclear Matrix Elements and Off-Forward Parton Distributions
- Azimuthal and single spin asymmetry in deep-inelastic lepton-nucleon scattering
- Nuclear Dependence in Drell-Yan Transverse Momentum Distribution
- Resummation of nuclear enhanced higher twist in the Drell Yan process
- Angular Dependence of the Nuclear Enhancement of Drell-Yan Pairs
- Nuclear Dependence in Direct Photon Production
- Nuclear Enhanced Higher-Twist Effects in the Drell-Yan Process
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- The evolution of the small x gluon TMD
- Next-to-leading order transverse momentum broadening for Drell-Yan production in p+A collisions
- Jet transport and photon bremsstrahlung via longitudinal and transverse scattering
- Photon bremsstrahlung from quark jet via transverse and longitudinal scatterings: single versus multiple scatterings
- Success of collinear expansion in the calculation of induced gluon emission