Proton internal pressure in pp and p̄p elastic scattering

Campos, S. D.

doi:10.1142/s0217751x1950057x

Cited by 5 publications

(10 citation statements)

References 34 publications

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“…The first extraction of the pressure distribution inside the proton has already generated over 70 citations, and inspired many theoretical papers that, among others, relate the pressure distribution to limits on deviations from general relativity at short distance [295], applications to computing the equation of state in neutron stars [296], Lattice calculations of gluon contributions to the pressure distribution [297], studies of a two-scale structure of the proton related to LHC results [298][299][300][301], computations of the proton mechanical radius [302,303], a detailed review paper [304], extensions of the concept of mechanical properties [305] and others.…”

Section: F Mapping the Energy-momentum Tensor Of Ground State Nucleons From Dvcs Datamentioning

confidence: 99%

Strong QCD from Hadron Structure Experiments

Brodsky

Burkert

Carman

et al. 2020

Int. J. Mod. Phys. E

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The topical workshop Strong QCD from Hadron Structure Experiments took place at Jefferson Lab from November 6–9, 2019. Impressive progress in relating hadron structure observables to the strong QCD mechanisms has been achieved from the ab initio QCD description of hadron structure in a diverse array of methods in order to expose emergent phenomena via quasi-particle formation. The wealth of experimental data and the advances in hadron structure theory make it possible to gain insight into strong interaction dynamics in the regime of large quark–gluon coupling (the strong QCD regime), which will address the most challenging problems of the Standard Model on the nature of the dominant part of hadron mass, quark–gluon confinement, and the emergence of the ground and excited state hadrons, as well as atomic nuclei, from QCD. This workshop aimed to develop plans and to facilitate the future synergistic efforts between experimentalists, phenomenologists, and theorists working on studies of hadron spectroscopy and structure with the goal to connect the properties of hadrons and atomic nuclei available from data to the strong QCD dynamics underlying their emergence from QCD. These results pave the way for a future breakthrough extension in the studies of QCD with an Electron–Ion Collider in the U.S.

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Section: F Mapping the Energy-momentum Tensor Of Ground State Nucleons From Dvcs Datamentioning

confidence: 99%

Strong QCD from Hadron Structure Experiments

Brodsky

Burkert

Carman

et al. 2020

Int. J. Mod. Phys. E

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show abstract

“…The definition of the energy scale µ depends on the system properties. For example, it is possible to identify µ 2 = Q 2 , where Q 2 the transferred momentum in the gluon frame [2]. The non-relativistic regime demands large Q 2 (small distances).…”

Section: A the Damped Confinement Potentialmentioning

confidence: 99%

“…Moreover, a change in the sign of the entropy may imply changes in the sign of the radial pressure. Then, the g factor used in [2] was defined as…”

Section: A the Damped Confinement Potentialmentioning

confidence: 99%

“…A study of the radial pressure distribution in the proton using a damped confinement potential was performed, revealing that kind of potential may be used to explain the experimental result [2]. This kind of potential can provide a parameter, the zero of the potential at r 0 , able to give a dynamical scale for the interaction between the antiquarkquark (qq) pair.…”

Section: Introductionmentioning

confidence: 99%

“…Instead of the dumped confinement potential used in Ref. [2], one uses here a slightly modified version to describe the interaction between the qq-pair. Of course, there is a myriad of confinement potentials able to furnish some information about this interaction [4][5][6][7][8][9][10][11] each model being useful in some ground.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of the Tsallis Entropy in the Proton Internal Pressure

Campos,

Amarante

2020

Preprint

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In this paper, one discusses the effects of the Tsallis entropy on the radial pressure distribution in the proton. Using a damped confinement potential the pressure distribution is obtained from the Tsallis entropy approach, being the entropic-index ω connected with the proton temperature concerning some transition temperature. Then, the approach allows the study of the proton thermal evolution up to the Quark-Gluon Plasma regime. The von Laue stability condition, arising from the pressure distribution results in positive and negative energy regions. An analogy between the results for the radial pressure distribution and the proton-proton and the antiproton-proton total cross section is performed. The negative energy region is identified with the odderon exchange while the positive represents the pomeron exchange dominance above some transition energy √ sc. The hollowness effect is also discussed in terms of the results obtained and the proposed analogy.

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Hollowness effect and entropy in high energy elastic scattering

Campos

Okorokov

2020

Phys. Scr.

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This paper presents a qualitative explanation for the hollowness effect based on the inelastic overlap function, claiming this result is a consequence of fundamental thermodynamic processes. Using the Tsallis entropy, one identifies the entropic index w with the ratio of the collision energy to critical one in the total cross-section. The integrated probability density function is replaced by the inelastic overlap function, which represents the probability of occurrence of an inelastic event depending on both the collision energy and impact parameter. The Coulomb potential, as well as the confinement potential, are used as naive approaches to describe the (internal) energy of the colliding hadrons. The Coulomb potential in the impact parameter picture is not able to furnish any reliable physical result near the forward direction. However, the confinement potential in the impact parameter space results in the hollowness effect shown by the inelastic overlap function near the forward direction.

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Proton internal pressure in pp and p̄p elastic scattering

Cited by 5 publications

References 34 publications

Strong QCD from Hadron Structure Experiments

Strong QCD from Hadron Structure Experiments

The Effects of the Tsallis Entropy in the Proton Internal Pressure

Hollowness effect and entropy in high energy elastic scattering

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