Quark Model and High Energy Collisions

Anisovich, V.V.; Kobrinsky, M. N.; Nyíri, J.; Shabelski, Yu. M.

doi:10.1142/0111

Cited by 71 publications

(70 citation statements)

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“…Therefore, the probability that a hadron remains one hadron after a qq collision is basically given by the same formfactor as in a true point-like electromagnetic collision. We get, thus, a natural explanation why the differential elastic cross section is proportional to the fourth power of the electromagnetic formfactor [94]. Deviation from this remarkable rule is expected at momentum transfers greater than ∼ 0.6 GeV, and indeed the elastic cross section is decreasing faster than F 4 (t) at large t.…”

Section: Chromomagnetic Pomeronmentioning

confidence: 59%

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Instantons at work

Diakonov

2003

Progress in Particle and Nuclear Physics

347

506

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The aim of this review is to demonstrate that there exists a coherent picture of strong interactions, based on instantons. Starting from the first principles of Quantum Chromodynamics -via the microscopic mechanism of spontaneous chiral symmetry breakingone arrives to a quantitative description of the properties of light hadrons, with no fitting parameters. The discussion of the importance of instanton-induced interactions in soft high-energy scattering is new.

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Section: Chromomagnetic Pomeronmentioning

confidence: 59%

“…Why is the additive quark model so successful phenomenologically, stating that hadron-hadron collision can be viewed, to a good approximation, as an incoherent sum of collisions of their constituent quarks [93,94]? Why is the total pp cross section around 40 mb?…”

Section: Chromomagnetic Pomeronmentioning

confidence: 99%

Instantons at work

Diakonov

2003

Progress in Particle and Nuclear Physics

347

506

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“…The mechanism of the formation of new qq-pairs to neutralize colour charges does not have a selected colour component, see e.g. [89]. In this case all colour components 3 ⊗3 = 1 + 8 behave similarly, that is, at small q 2 the singlet and octet components of the potential are uniformly singular, V…”

Section: Systematics Of Kaons In the (J Mmentioning

confidence: 99%

Systematics of quark–antiquark states and scalar exotic mesons

Anisovich¹

2004

Phys.-Usp.

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The analysis of the experimental data of Crystal Barrel Collaboration on the pp annihilation in flight with the production of mesons in the final state resulted in a discovery of a large number of mesons over the region 1900-2400 MeV, thus allowing us to systematize quark-antiquark states in the (n, M 2 ) and (J, M 2 ) planes, where n and J are radial quantum number and spin of the meson with the mass M . The data point to meson trajectories in these planes being approximately linear, with a universal slope. The sector of scalar mesons is discussed in more detail, where, on the basis of the recent K-matrix analysis, the nonet classification of quark-antiquark states was performed: in the region below 2000 MeV, two scalar nonets are fixed, that is, the basic one and the nonet of the first radial excitation. In the scalar sector, there are two states with the isospin

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“…This was formulated rather long ago [22]. At 70's and the beginning of 80's, parallel with accumulating experimental data, the arguments in favour of pomeron's small size grew up [23]; they were summarized in [24]. Later on, the small-size pomeron was named a point-like pomeron [25].…”

Section: Introductionmentioning

confidence: 99%

Hadron diffractive processes: the structure of soft pomeron and colour screening

Dakhno¹,

Nikonov²

1999

EPJ A

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On the basis of the experimental data on diffractive processes in πp, pp and pp collisions at intermediate, moderately high and high energies, we restore the scattering amplitude related to the t-channel exchange by vacuum quantum numbers by taking account of the diffractive s-channel rescatterings. At intermediate and moderately high energies, the t-channel exchange amplitude turns, with a good accuracy, into an effective pomeron which renders the results of the additive quark model. At superhigh energies the scattering amplitude provides a Froissart-type behaviour, with an asymptotic universality of cross sections such as σ tot πp /σ tot pp → 1 at s → ∞. The quark structure of hadrons being taken into account at the level of constituent quarks, the cross sections of pion and proton (antiproton) in the impact parameter space of quarks, σ π ( r 1⊥ , r 2⊥ ; s) and σ p ( r 1⊥ , r 2⊥ , r 3⊥ ; s), are found as functions of s. These cross sections implicate the phenomenon of colour screening: they tend to zero at | r i⊥ − r k⊥ | → 0. The effective colour screening radius for pion (proton) is found for different s. The predictions for the diffractive cross sections at superhigh energies are presented.

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Quark Model and High Energy Collisions

Cited by 71 publications

References 0 publications

Instantons at work

Instantons at work

Systematics of quark–antiquark states and scalar exotic mesons

Hadron diffractive processes: the structure of soft pomeron and colour screening

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