Challenges with Large Transverse Momentum in Semi-Inclusive Deeply Inelastic Scattering

Abstract

We survey the current phenomenological status of semi-inclusive deep inelastic scattering at moderate hard scales and in the limit of very large transverse momentum. As the transverse momentum becomes comparable to or larger than the overall hard scale, the differential cross sections should be calculable with fixed order pQCD methods, while small transverse momentum (TMD factorization) approximations should eventually break down. We find large disagreement between HERMES and COMPASS data and fixed order calculations done with modern parton densities, even in regions of kinematics where such calculations should be expected to be very accurate. Possible interpretations are suggested.

11 pages, 7 figures. arXiv admin note: text overlap with arXiv:hep-ph/0411212 by other authors, version to appear in PRD

References in corpus (8)

• Global Analysis of Fragmentation Functions for Protons and Charged Hadrons
• Matches and mismatches in the descriptions of semi-inclusive processes at low and high transverse momentum
• Fully Unintegrated Parton Correlation Functions and Factorization in Lowest Order Hard Scattering
• Transverse momentum dependent distributions with jets
• Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T
• Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering
• Heavy Quarkonium Production at Collider Energies: Partonic Cross Section and Polarization
• A study on the interplay between perturbative QCD and CSS/TMD formalism in SIDIS processes

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