Rapidity gaps in perturbative QCD

Journal Article · Thu May 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.5585· OSTI ID:562454

Brodsky, S J ^[1]; Hoyer, P; Magnea, L ^[2]

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1. Stanford Linear Accelerator, Stanford University, Stanford, California 94309 (United States)
2. NORDITA, Blegdamsvej 17, DK-2100 Copenhagen O/ (Denmark)

We analyze diffractive deep inelastic scattering within perturbative QCD by studying lepton scattering on a heavy quark target. Simple explicit expressions are derived in impact parameter space for the photon wave function and the scattering cross sections corresponding to single and double Coulomb gluon exchange. At limited momentum transfers to the target, the results agree with the general features of the {open_quotes}aligned jet model.{close_quotes} The color-singlet exchange cross section receives a leading twist contribution only from the aligned jet region, where the transverse size of the photon wave function remains finite in the Bjorken scaling limit. In contrast with inclusive DIS, in diffractive events there is no leading twist contribution to {sigma}{sub L}/{sigma}{sub T} from the lowest order (q{bar q}) photon Fock state, and the cross section for heavy quarks is power suppressed in the quark mass. There are also important contributions with large momentum transfer to the target, which corresponds to events having high transverse momentum production in both the projectile and target rapidity regions, separated by a rapidity gap. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Massachusetts Institute of Technology
• DOE Contract Number: AC02-76ER03069; AC03-76SF00515
• OSTI ID: 562454
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CROSS SECTIONS
DEEP INELASTIC SCATTERING
ELECTRON-QUARK INTERACTIONS
GLUONS
IMPACT PARAMETER
MOMENTUM TRANSFER
PARTICLE RAPIDITY
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
SCALING LAWS
WAVE FUNCTIONS