Proton-proton elastic scattering at the LHC energy of \chem{\sqrt{s} = 7\,TeV}

Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Berardi, V.; Berretti, M.; Bozzo, M.; Brücken, E.; Buzzo, A.; Cafagna, F.; Calicchio, M.; Catanesi, M. G.; Covault, C. E.; Csanád, M.; Csörgő, T.; Deile, M.; Dimovasili, E.; Doubek, M.; Eggert, K.; Eremin, V.; Ferro, F.; Fiergolski, A.; García, F.; Gianì, S.; Greco, V.; Grzanka, L.; Heino, J.; Hilden, T. E.; Janda, Martin; Kašpar, J.; Kopal, J.; Kundrát, V.; Kurvinen, K.; Lami, S.; Latino, G.; Lauhakangas, R.; Leszko, T.; Lippmaa, É.; Lokajíček, M.; Vetere, M. Lo; Rodríguez, F. Lucas; Macrı́, M.; Magaletti, L.; Magazzù, G.; Mercadante, A.; Meucci, M.; Minutoli, S.; Nemes, F.; Niewiadomski, H.; Noschis, E.; Novák, T.; Oliveri, E.; Oljemark, F.; Orava, R.; Oriunno, M.; Österberg, K.; Perrot, A. L.; Palazzi, P.; Pedreschi, E.; Petäjäjärvi, Juha; Procházka, J.; Quinto, M.; Radermacher, E.; Radicioni, E.; Ravotti, F.; Robutti, E.; Ropelewski, L.; Ruggiero, G.; Saarikko, H.; Santroni, A.; Scribano, A.; Sette, G.; Snoeys, W.; Spinella, F.; Sziklai, J.; Taylor, C.; Turini, N.; Vacek, V.; Vítek, Michal; Welti, J.; Whitmore, J.

doi:10.1209/0295-5075/95/41001

Cited by 166 publications

(144 citation statements)

References 35 publications

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“…4. In the former case (7 TeV) the straight line segments and the point indicate recent experimental results obtained by the TOTEM Collaboration [1,2] (see Table V): the optical point with the slope at the diffraction peak (dotted segment), the dip position (dashed vertical segment) and the value of the differential cross section at q 2 = 0.7 GeV 2 (black square). …”

Section: Testing Parametersmentioning

confidence: 75%

“…However, beyond this region, changes of slopes are expected, as indicated by the results presented in the following section. This effect seems not to be present in the published plots by the TOTEM Collaboration [1], suggesting that other form factors should be regarded in order to describe the high-t data. We shall return to this point in the conclusions and final remarks.…”

Section: Eikonalized Approachmentioning

confidence: 83%

“…First results at 7 TeV have already been published showing that no model predictions present full agreement with both total cross section and the differential cross section up to 2.5 GeV 2 [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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.

show abstract

Section: Testing Parametersmentioning

confidence: 75%

Section: Eikonalized Approachmentioning

confidence: 83%

See 1 more Smart Citation

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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“…The most important contribution at high energies (e.g., W 1 TeV) is clearly that from gluon-gluon scattering, parametrized [20,21] at W = 1800 GeV. Bottom dσ/dt from the TOTEM experiment [22] at W = 7000 GeV.…”

Section: Structure Of the Eikonal Amplitudes And The Edge In The mentioning

confidence: 99%

Eikonal fit toppandp¯pscattering and the edge in the scattering amplitude

Block

Durand

et al. 2015

Phys. Rev. D

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We make a detailed eikonal fit to current data on the total and elastic scattering cross sections, the ratios ρ of the real to the imaginary parts of the forward elastic scattering amplitudes, and the logarithmic slopes B of the differential cross sections dσ/dt at t = 0, for proton-proton and antiproton-proton scattering at center-of-mass energies W from 5 GeV to 57 TeV. The fit allows us to investigate the structure of the eikonal amplitudes in detail, including the impact-parameter structure of the energy-independent edge in the scattering amplitude shown to exist by Block et al.[1]. We show that the edge region has an essentially fixed shape with a peak at approximately the "black disk" radius Rtot = σtot/2π of the scattering amplitude, a constant width t edge ≈ 1 fm, and migrates to larger impact parameters with increasing energy proportionally to Rtot. We comment on possible physical mechanisms which could lead to the edge. We show that the eikonal results for the cross sections and ρ values are described to high accuracy by analytic expressions of the forms used in earlier analyses by Block and Halzen, and extend the result to the elastic-scattering slope parameter B. These expressions provide simple extrapolations of the results to much higher energies where the cross sections approach the black disk limit with σ elas , σ inel → σtot/2 and B → σtot/8π. Finally, we calculate the survival probabilities for large rapidity gaps in the scattering.

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“…In order to compare with the available pp experimental data, we take σ = σ pp inel = 70 mb [23] as the transverse area of the collision. The number of strings, < N s >, can be obtained from the SFM code [24], a Monte Carlo code based on the quark gluon string model, similar to the Dual Parton Model [25] or EPOS [26].…”

mentioning

confidence: 99%

High multiplicityppevents andJ/ψproduction at energies available at the CERN Large Hadron Collider

Ferreiro

Pajares

2012

Phys. Rev. C

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We discuss the dependence of J/ψ production on the charged particle multiplicity in proton-proton collisions at LHC energies. We show that, in the framework of parton saturation or string interaction models, the hard J/ψ production exhibits a significant growth with the multiplicity, which is stronger than linear in the high density domain. This departure from linearity, that should affect any hard observable, applies for high multiplicity proton-proton collisions in the central rapidity region and is a consequence of the parton saturation or the strong interaction among colour ropes that take place at LHC energies. Our assumption, the existence of coherence effects present in proton-proton collisions at high energy, can also be checked by studying the particular shape of the probability distribution associated to the J/ψ production.RHIC [1,2,3,4] and LHC [5,6,7] data on heavy-ion collisions have shown several important features which indicate the formation of a high density partonic medium with characteristic properties as the low shear viscosity and high opacity. Since the energy density achieved in high multiplicity events produced in pp collisions at LHC is comparable to the reached density in CuCu central collisions or AuAu peripheral collisions at √ s N N = 200 GeV, it is pertinent to wonder about the possibility to obtain a similar high density medium which would be reflected in experimental observables, similar to heavy-ion collisions. An illustration of this would be the predicted ridge structure [8,9] observed by CMS collaboration [10] in pp collisions. Also, the eventuality that other observables, as long range rapidity correlations [11,12,13], energy loss [14], or the elliptic flow [15,16], are measurable in pp collisions, has been reckoned with in different frameworks.We address here to the J/ψ production in high multiplicity pp collisions. We will show that the rise of J/ψ production in the highest multiplicity events observed by the ALICE collaboration [17] can be naturally explained as a consequence of string interaction or parton saturation. This feature is particularly important, since, due to the absence of nuclear effects in this case, it can be use as a baseline in order to disentangle different mechanism that are expected in heavy-ion collisions, as the J/ψ suppression due to sequential dissociation [18] or the J/ψ enhancement due to the recombination of uncorrelated c andc quarks [19].

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Proton-proton elastic scattering at the LHC energy of \chem{\sqrt{s} = 7\,TeV}

Cited by 166 publications

References 35 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

Eikonal fit toppandp¯pscattering and the edge in the scattering amplitude

High multiplicityppevents andJ/ψproduction at energies available at the CERN Large Hadron Collider

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