Diffractive Excitation in DIS and pp Collisions

Abstract

We have in earlier papers presented an extension of Mueller's dipole cascade model, which includes subleading effects from energy conservation and running coupling as well as colour suppressed effects from pomeron loops via a ``dipole swing''. The model was applied to describe the total cross sections in pp and gamma*p collisions. In this paper we present a number of improvements of the model, in particular related to the confinement mechanism. A consistent treatment of dipole evolution and dipole--dipole interactions is achieved by replacing the infinite range Coulomb potential by a screened potential, which further improves the frame-independence of the model. We then apply the model to elastic scattering and diffractive excitation, where we specifically study the effects of different sources for fluctuations. In our formalism we can take into account contributions from all different sources, from the dipole cascade evolution, the dipole--dipole scattering, from the impact-parameter dependence, and from the initial photon and proton wavefunctions. Good agreement is obtained with data from the Tevatron and from HERA, and we also present some predictions for the LHC.

correction of title

References in corpus (9)

• Quark contribution to the small-$x$ evolution of color dipole
• Stringy Instantons at Orbifold Singularities
• Quark loop contribution to BFKL evolution: Running coupling and leading-N_f NLO intercept
• Diffusive scaling and the high-energy limit of deep inelastic scattering in QCD at large N_c
• Small-x Dipole Evolution Beyond the Large-N_c Limit
• On the role of NLL corrections and Energy Conservation in the High Energy Evolution of QCD
• Geometric Scaling and QCD Dynamics in DIS
• The BFKL Pomeron Calculus: Probabilistic Interpretation and High Energy Amplitude
• On the Dipole Swing and the Search for Frame Independence in the Dipole Model

Cited by in corpus (18)

• Improving the kinematics for low-x QCD evolution equations in coordinate space
• Inclusive and Exclusive observables from dipoles in high energy collisions
• Eccentricity and elliptic flow in proton-proton collisions from parton evolution
• Small x nonlinear evolution with impact parameter and the structure function data
• Diffractive and non-diffractive wounded nucleons and final states in pA collisions
• Elastic and quasi-elastic $pp$ and ${\gamma }^{\star }p$ scattering in the Dipole Model
• Fluctuations, Saturation, and Diffractive Excitation in High Energy Collisions
• CCFM Evolution with Unitarity Corrections
• Quantitative study of the transverse correlation of soft gluons in high energy QCD
• Exclusive final states in diffractive excitation
• The Relation between the Good-Walker and Triple-Regge Formalisms for Diffractive Excitation
• On the Dipole Swing and the Search for Frame Independence in the Dipole Model
• Diffractive excitation in $pp$ and $pA$ collisions at high energies
• Coherent and incoherent diffractive hadron production in pA collisions and gluon saturation
• A model of diffractive excitation in $pp$ collisions at high energies
• Probing the low-x structure of nuclear matter with diffractive hadron production in pA collisions
• Total, inelastic and (quasi-)elastic cross sections of high energy pA and gamma-A reactions with the dipole formalism
• Fluctuations, Saturation, and Diffractive Excitation at low x