High-energy and elementary-particle physics

Kaǐdalov, A. B.; Migdal, Alexander; Chuvilo, I.V.

doi:10.1070/pu1975v018n06abeh004887

Cited by 28 publications

(58 citation statements)

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“…It is expected that multi-Pomeron-exchange effects increase with s. This corresponds to a decreasing effective ǫ [29] which will suppress σ total sd corresponding to the observed behavior. To the best of our knowledge, effective ǫ values have never been directly extracted from σ total sd data on React.…”

Section: Introductionmentioning

confidence: 73%

“…2 [25]. Of course, the observed σ total sd does not display this behavior, but rises much more modestly 6 with s. This discrepency between the predictions and the observed σ total sd should be understandable in the framework of Gribov's Reggeon calculus [27] through multi-Pomeron-exchange effects (Regge cuts), described variously in the literature as screening, shadowing, absorption or damping [28,29,30,31]. Eq.…”

Section: Introductionmentioning

confidence: 96%

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Inelastic diffraction data and the effective omeron trajectory

Erhan¹,

Schlein²

2000

Physics Letters B

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A further analysis of inelastic diffraction data at the ISR and SPS-Collider confirms the relatively flat s-independent Pomeron trajectory in the high-|t| domain, 1 < |t| < 2 GeV 2 , reported earlier by the UA8 Collaboration. At |t| = 1.5 GeV 2 , α = 0.92 ± 0.03 is in agreement with the trajectories found in diffractive photoproduction of vector mesons at HERA. This suggests a universal fixed Pomeron trajectory at high-|t|. We also show that a triple-Regge Pomeron-exchange parametrization fit to the data requires an s-dependent (effective) Pomeron trajectory intercept, α(0), which decreases with increasing s, as expected from unitarization (multi-Pomeron-exchange) calculations. α(0) = 1.10 at the lowest ISR energy, 1.03 at the SPS-Collider and perhaps smaller at the Tevatron.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 96%

Inelastic diffraction data and the effective omeron trajectory

Erhan¹,

Schlein²

2000

Physics Letters B

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“…But those Pomerons may interact with each other at high energy [ 2,5], then they give another type of interaction called enhanced diagram. There are many types of enhanced diagrams depending on the number of Pomerons for each vertices and on the number of vertices.…”

Section: + + + +mentioning

confidence: 99%

New results for hadronic collisions in the framework of the Parton-Based Gribov-Regge Theory

et al. 2003

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We recently proposed a new approach to high energy nuclear scattering, which treats hadronic collisions in a sophisticated way. Demanding theoretical consistency as a minimal requirement for a realistic model, we provide a solution for the energy conservation, screening problems and identical elementary interactions, the so-called "Parton-Based Gribov-Regge Theory" including enhanced diagrams. We can now present some of our results for SPS and RHIC energies.

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“…[44]). In these models the importance of multiple pomeron exchanges decreases quickly with growing photon virtuality.…”

Section: Systematic Errorsmentioning

confidence: 99%

Measurement of the diffractive cross section in deep inelastic scattering

Derrick

Botje²,

Chlebana³

et al. 1996

Zeitschrift f�r Physik C Particles and Fields

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Diffractive scattering of γ * p → X + N , where N is either a proton or a nucleonic system with M N < 4 GeV has been measured in deep inelastic scattering (DIS) at HERA. The cross section was determined by a novel method as a function of the γ * p c.m. energy W between 60 and 245 GeV and of the mass M X of the system X up to 15 GeV at average Q 2 values of 14 and 31 GeV 2 . The diffractive cross section dσ dif f /dM X is, within errors, found to rise linearly with W . Parameterizing the W dependence by the form dσ dif f /dM X ∝ (W 2 ) (2α IP −2) the DIS data yield for the pomeron trajectory α IP = 1.23 ± 0.02(stat) ± 0.04(syst) averaged over t in the measured kinematic range assuming the longitudinal photon contribution to be zero. This value for the pomeron trajectory is substantially larger than α IP extracted from soft interactions. The value of α IP measured in this analysis suggests that a substantial part of the diffractive DIS cross section originates from processes which can be described by perturbative QCD. From the measured diffractive cross sections the diffractive structure function of the proton F D(3) 2 (β, Q 2 , x IP ) has been determined, where β is the momentum fraction of the struck quark in the pomeron. The form F D(3) 2 = constant · (1/x IP ) a gives a good fit to the data in all β and Q 2 intervals with a = 1.46 ± 0.04(stat) ± 0.08(syst).

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High-energy and elementary-particle physics

Cited by 28 publications

References 0 publications

Inelastic diffraction data and the effective omeron trajectory

Inelastic diffraction data and the effective omeron trajectory

New results for hadronic collisions in the framework of the Parton-Based Gribov-Regge Theory

Measurement of the diffractive cross section in deep inelastic scattering

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