Abstract
We describe a QCD based model which incorporates the main properties of the inclusive particle distributions expected for diffractive processes, including the diffractive dissociation at high energies. We study, in turn, the total cross section, sigma _mathrm{tot}, the differential elastic, dsigma _mathrm{el}/dt, cross section, the dependence of the single proton dissociation cross section, xi dsigma ^mathrm{SD}/dxi , on the momentum fraction, xi =1-x_L, lost by the leading proton, the multiplicity distributions in inelastic (non-diffractive) collisions and in the processes of dissociation. Besides this we calculate the mean transverse momenta of the ‘wee partons’ (secondaries) produced in the case of dissociation (that is in the processes with a large rapidity gap) and compare it with that in inelastic interactions.
Highlights
In a recent paper [1] the inclusive distribution of identified particles produced in Single Diffractive Dissociation (SD)pp → p+ at RHIC in pXroptroonc–epssreostownecroelslitsuidoinesdawt i√thsth=eSTAR detector 200 GeV
The leading proton is observed in the TOTEM or ALFA Roman Pots while the diffracted system X is studied by the central CMS
The pure Pomeron component is shown by the dashed curve while the solid curve riSneesccultul.td3fe.o5sr)t.√hTeshse=ecbol8anTcdkeaVrcyuirrsveseghsgocewoonrnrebcsoypntohtrneidbtuhtotiico√knsb(la=used1ce3usrTcvreeiVb. .HeTdehirnee we use λ = 0.2 [31,32] and σR = 22 mb which is consistent with the analysis of [32] and the secondary Reggeon contribution in the COMPETE fit [47,48] of the pp total cross sections
Summary
In a recent paper [1] the inclusive distribution of identified particles produced in Single Diffractive Dissociation (SD)pp → p+ at RHIC in pXroptroonc–epssreostownecroelslitsuidoinesdawt i√thsth=eSTAR detector 200 GeV. In a recent paper [1] the inclusive distribution of identified particles produced in Single Diffractive Dissociation (SD). Pp → p+ at RHIC in pXroptroonc–epssreostownecroelslitsuidoinesdawt i√thsth=e. The SD events were selected by observing in the Roman Pot system(s) the leading proton (or protons) which carry a large fraction, xL , of the beam momentum. Analogous experiments are underway or being planned by CMS-. TOTEM (PPS) and ATLAS-AFP at the LHC. The leading proton is observed in the TOTEM or ALFA Roman Pots while the diffracted system X is studied by the central CMS or ATLAS detectors The leading proton is observed in the TOTEM or ALFA Roman Pots while the diffracted system X is studied by the central CMS or ATLAS detectors (see e.g. [2,3])
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