Elastic scattering at larget

Donnachie, A.; Landshoff, P. V.

doi:10.1007/bf01546237

Cited by 102 publications

(121 citation statements)

References 18 publications

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“…Particularly in the range 1.5 < −t < 2.0 GeV 2 the data presented a power law pattern proportional to ∼ |t| −8 , which is in poorly agreement with general model predictions. Interestingly enough, this specific power law behaviour was first envisaged by Donnachie and Landshoff [48] in a model which accounts for the contribution of three gluon exchange in elastic scattering at high energies. Yet, in the QCD context, the constituent interchange model by Lepage and Brodsky [49] predicts a different power law behaviour, namely ∼ |t| −10 .…”

Section: Discussionmentioning

confidence: 73%

Aspects of a dynamical gluon mass approach to elastic hadron scattering at LHC

Fagundes¹,

Luna²,

Menon³

et al. 2012

Nuclear Physics A

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We discuss how the main features of the recent LHC data on elastic scattering can be described by a QCD-inspired formalism with a dynamical infrared mass scale. For this purpose new developments on a dynamical gluon mass approach are reported, with emphasis on a method to estimate uncertainty bounds in the predictions for the high-energy scattering observables. We investigate the effects due to the correlations among the fixed and free parameters involved and show that the band of predictions are consistent with the recent data from the TOTEM experiment, including the forward quantities and the differential cross section up to the dip position.

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Section: Discussionmentioning

confidence: 73%

Aspects of a dynamical gluon mass approach to elastic hadron scattering at LHC

Fagundes¹,

Luna²,

Menon³

et al. 2012

Nuclear Physics A

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“…Also our dσ/dt is the same for pp and pp scattering, whereas experimentally these differ markedly in the dip region. This was nicely explained theoretically in [41] as an interference of single and double pomeron and three-gluon exchange. We will have to see if higher cumulant terms and/or a departure from the strict quark-diquark picture of the proton will lead us to an improvement on these points in our model.…”

Section: A ≤mentioning

confidence: 79%

“…7 we show our prediction for dσ/dt in pp scattering at √ s = 14 TeV corresponding to the LHC energy. The total cross section is again assumed to be given by the DL parameterisation (41). This was used as constraint to fix the extension parameter S p according to Fig.…”

Section: A ≤mentioning

confidence: 99%

Differential cross sections for high energy elastic hadron-hadron scattering in nonperturbative QCD

Berger

Nachtmann

1999

Eur. Phys. J. C

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Total and differential cross sections for high energy and small momentum transfer elastic hadron-hadron scattering are studied in QCD using a functional integral approach. The hadronic amplitudes are governed by vacuum expectation values of lightlike Wegner-Wilson loops, for which a matrix cumulant expansion is derived. The cumulants are evaluated within the framework of the Minkowskian version of the model of the stochastic vacuum. Using the second cumulant, we calculate elastic differential cross sections for hadron-hadron scattering. The agreement with experimental data is good.

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“…[11]. However, if non-trivial interference effects in spin variables predicted in this work could be observed in experiment, it will not only be just a supplementary support for the f 1 trajectory but also a good test of the hard Pomeron contribution as well, because the hard Pomeron is important only in the J/ψ photoproductions.We should emphasize that the present investigation is the first step from the point of view of a dynamical treatment of the problem, as, for example, has been done for effective two-gluon model of Pomeron [18]. Here, we do not know the sign of g V f 1 γ vertex, and have predicted only the absolute value of beam-target asymmetry.…”

mentioning

confidence: 94%

“…We should emphasize that the present investigation is the first step from the point of view of a dynamical treatment of the problem, as, for example, has been done for effective two-gluon model of Pomeron [18]. Here, we do not know the sign of g V f 1 γ vertex, and have predicted only the absolute value of beam-target asymmetry.…”

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confidence: 94%

On a possible manifestation of f1 trajectory in J/ψ photoproduction

Roy

Morii

Титов³

2001

Physics Letters B

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We analyze a possible manifestation of f 1 -trajectory in elastic J/ψ photoproduction at high energy and large momentum transfer. Inspite of the small contribution of f 1 -trajectory in total cross sections, it becomes significant in various spin observables. In particular, we show that the crucial test for f 1 -exchange can be made by measuring the single beam-and double parity-and beam-target asymmetries at large momentum transfers, where a strong deviation from the exchange of conventional Pomerons is expected. This effect is caused by the interference of natural (Pomeron) and unnatural (f 1 ) parity exchange parts of amplitude in the region where their contributions become comparable to each other and might be interesting to observe in forthcoming experiments, if feasible.PACS numbers: 13.85.Dz 12.40. Nn, 13.85.Lg Typeset using REVT E X * Email address: roy@radix.h.kobe-u.ac.jp † Email address: morii@kobe-u.ac.jp ‡ Email address: atitov@thsun1.jinr.ruHadronic diffraction has regained popularity in the recent years due to many new interesting experiments at HERA and TEVATRON. One of them is the vector meson photoproduction at HERA. This channel is exciting because here one can study any of the known vector mesons from the lightest ρ to heavier J/ψ and Υ and hope to see the transition from the "soft" to the "hard" regime. The most popular models for description of the diffractive processes at high energy are based on the Regge theory [1] where the corresponding multiparticle exchanges with definite quantum numbers are expressed by the effective exchange of one Regge pole whose propagator is given by (s/s 0 ) α(t) . The Regge trajectory α(t) has a simple linear form α(t) = α(0) + α ′ t and the main contribution to the elastic forward photoproduction of light vector mesons comes from the Pomeron (so-called "soft" Pomeron) trajectory with intercept 1.08 and slope of 0.25 GeV −2 [2]. This leads to rather weak energy dependence of the cross section gradually becoming almost constant at very high energies. However, the Pomeron, though amply used to successfully analyze the high energy total hadron cross sections, still remains mysterious in its partonic content, hence its manifestation in QCD also remains unknown.Recent studies of elastic vector meson photoproduction data shows that the J/ψ crosssection shows a steep rise with the energy W [3]. This behavior is quite different from that of other light vector mesons like ρ, ω and φ which are characterized by a weak dependence of their cross section on energy [σ ∝ W 0.22 ], while for J/ψ it is parameterized as W 0.8 . This new phenomenon drew a lot of attention in this field leading to several models being proposed to explain the data [4][5][6][7]. However, this subject still remains controversial. Donnachie and Landshoff [4] claimed that perturbative QCD does not work in this energy region and suggested the use of a small admixture of the second "hard" Reggeon exchange whose trajectory is given by α h (t) = 1.418 + 0.1 t. The conventional mesonic trajector...

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Elastic scattering at larget

Cited by 102 publications

References 18 publications

Aspects of a dynamical gluon mass approach to elastic hadron scattering at LHC

Aspects of a dynamical gluon mass approach to elastic hadron scattering at LHC

Differential cross sections for high energy elastic hadron-hadron scattering in nonperturbative QCD

On a possible manifestation of f1 trajectory in J/ψ photoproduction

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