Endpoint behavior of high-energy scattering cross sections

Junegone Chay, Chul Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In high-energy processes near the endpoint, there emerge new contributions associated with spectator interactions. Away from the endpoint region, these new contributions are suppressed compared to the leading contribution, but the leading contribution becomes suppressed as we approach the endpoint and the new contributions become comparable. We present how the new contributions scale as we reach the endpoint and show that they are comparable to the suppressed leading contributions in deep inelastic scattering by employing a power-counting analysis. The hadronic tensor in deep inelastic scattering is shown to factorize including the spectator interactions, and it can be expressed in terms of the light cone distribution amplitudes of initial hadrons. We also consider the contribution of the spectator contributions in Drell-Yan processes. Here the spectator interactions are suppressed compared to double parton annihilation according to the power counting.

Original languageEnglish
Article number094021
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number9
DOIs
Publication statusPublished - 2010 Nov 17

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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