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

Fagundes, D. A.; Luna, E. G. S.; Menon, M. J.; Natale, A. A.

doi:10.1016/j.nuclphysa.2012.05.002

Cited by 31 publications

(13 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the behavior of the amplitudes gives physical information on the collision dynamics and its determination is model dependent, it is important to compare our results with other models that describe elastic pp and pp scattering processes [11][12][13][14][15]. Results on amplitudes that can be directly compared with ours are given by the model proposed by Bourrely, Soffer and Wu (hereafter referred to as BSW model) [11].…”

Section: Comparison With the Amplitudes In The Bsw Modelmentioning

confidence: 98%

Amplitudes and observables in pp elastic scattering at $\sqrt{s}=7\ \mbox{TeV}$

2013

View full text Add to dashboard Cite

A precise analysis of the pp elastic scattering data at 7 TeV in terms of its amplitudes is performed as an extension of previous studies for lower energies. Slopes B R and B I of the real and imaginary amplitudes are independent quantities, and a proper expression for the Coulomb phase is used. The real and imaginary amplitudes are fully disentangled, consistently with forward dispersion relations for amplitudes and for slopes. We present analytic expressions for the amplitudes that cover all t range completely, while values of total cross section σ, ratio ρ, B I and B R enter consistently to describe forward scattering.It is stressed that the identification of the amplitudes is an essential step for the description of elastic scattering, and pointed out the importance of the experimental investigation of the transition range from non-perturbative to perturbative dynamics, that may confirm the three gluon exchange mechanism observed at lower energies.

show abstract

Section: Comparison With the Amplitudes In The Bsw Modelmentioning

confidence: 98%

Amplitudes and observables in pp elastic scattering at $\sqrt{s}=7\ \mbox{TeV}$

2013

View full text Add to dashboard Cite

show abstract

“…It is typical of eikonalized formalisms, as the traditional models by Chou and Yang [37], Bourrely, Soffer and Wu [38][39][40], the hybrid approach by Block and Halzen [41] and a number of models that have been continuously refined and developed (for example, [18][19][20][21][22][23][26][27][28]). …”

Section: The Black Diskmentioning

confidence: 99%

“…In fact, although partial descriptions of the bulk of the experimental data can be obtained in the context of phenomenological models (for reviews see, for example, [12][13][14][15][16][17]), the efficiency of any representative approach depends on a constant feedback of new and adjustable parameters, which in turn are dictated by the new experimental data. As a practical consequence, equivalent data descriptions may be obtained in different phenomenological contexts, associated, in general, to different physical pictures for the same phenomenon (compare, for example, [18][19][20][21][22][23][24][25][26][27][28][29]), resulting, nearly always, in a renewed open problem.…”

Section: Introductionmentioning

confidence: 99%

Exploring central opacity and asymptotic scenarios in elastic hadron scattering

Fagundes¹,

Menon²,

Silva³

2016

Nuclear Physics A

Self Cite

View full text Add to dashboard Cite

In the absence of a global description of the experimental data on elastic and soft diffractive scattering from the first principles of QCD, model-independent analyses may provide useful phenomenological insights for the development of the theory in the soft sector. With that in mind, we present an empirical study on the energy dependence of the ratio X between the elastic and total cross sections; a quantity related to the evolution of the hadronic central opacity. The dataset comprises all the experimental information available on proton-proton and antiproton-proton scattering in the c.m energy interval 5 GeV -8 TeV. Generalizing previous works, we discuss four model-independent analytical parameterizations for X, consisting of sigmoid functions composed with elementary functions of the energy and three distinct asymptotic scenarios: either the standard black disk limit or scenarios above or below that limit. Our two main conclusions are the following: (1) although consistent with the experimental data, the black disk does not represent an unique solution; (2) the data reductions favor a semi-transparent scenario, with asymptotic average value for the ratioX = 0.30 ± 0.12. In this case, within the uncertainty, the asymptotic regime may already be reached around 1000 TeV. We present a comparative study of the two scenarios, including predictions for the inelastic channel (diffraction dissociation) and the ratio associated with the total cross-section and the elastic slope. Details on the selection of our empirical ansatz for X and physical aspects related to a change of curvature in this quantity at 80 -100 GeV, indicating the beginning of a saturation effect, are also presented and discussed.

show abstract

“…There are many others (albeit with larger number of adjustable and hidden parameters) reviewed in[10] and recently published[6,12,17,18].…”

mentioning

confidence: 99%

Proton periphery activated by multiparticle dynamics

Dremin

Nechitaǐlo

2013

Nuclear Physics A

View full text Add to dashboard Cite

It is shown that protons become more active at the periphery with increase of their collision energy. By computing the impact parameter distribution of the proton-proton overlap function at LHC energies and comparing it with ISR (and S$p\bar p$S for $p\bar p$) data, we conclude that the peripheral region of protons plays an increasing role in the rise of total cross sections through multiparticle dynamics. The size of the proton as well as its blackness increase with energy. The protons become more black both in the central region and, especially, at the periphery. This effect can be related to the ridge phenomenon and to the inelastic diffraction processes at LHC energies.Comment: 9 pages, 4 figure

show abstract

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

Cited by 31 publications

References 76 publications

Amplitudes and observables in pp elastic scattering at $\sqrt{s}=7\ \mbox{TeV}$

Amplitudes and observables in pp elastic scattering at $\sqrt{s}=7\ \mbox{TeV}$

Exploring central opacity and asymptotic scenarios in elastic hadron scattering

Proton periphery activated by multiparticle dynamics

Contact Info

Product

Resources

About