Single-particle spectra in soft hadron-hadron interactions and two-component cascade model

Tashiro, Tsutomu; Noda, Hidetoshi; Kinoshita, Kisei; Iso, Chikashi

doi:10.1007/bf01561051

Cited by 13 publications

(6 citation statements)

References 42 publications

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“…Diquarks as single entities appear also in the framework of quark-diquark cascade models to explain small-/? T hadronic production in highenergy interactions (Kinoshita et al, 1980(Kinoshita et al, , 1982a(Kinoshita et al, , 1982bMisra et al, 1982;Tashiro et al, 1987) and in a preasymptotic mechanism for nucleon-antinucleon annihilation (Zakharov and Kopeliovich, 1989). Diquarks, in quark-diquark fragmentation chains or quark-diquark fusion or recombination schemes, are often introduced in the description of the hadronic production of baryons, in particular hyperons (see Donnachie, 1980;Fisjak and Kistenev, 1981;Cooke, 1984;and, essentially, all Monte Carlo-based schemes).…”

Section: Soft Hadronic Processesmentioning

confidence: 99%

Diquarks

et al. 1993

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It is becoming increasingly clear that the concept of a diquark (a two-quark system) is important for understanding hadron structure and high-energy particle reactions. According to our present knowledge of quantum chromodynamics (QCD), diquark correlations arise in part from spin-dependent interactions between two quarks, from quark radial or orbital excitations, and from quark mass differences. Diquark substructures affect the static properties of baryons and the mechanisms of baryon decay. Diquarks also play a role in hadron production in hadron-initiated reactions, deep-inelastic lepton scattering by hadrons, and in e + e~ reactions. Diquarks are important in the formation and properties of baryonium and mesonlike semistable states. Many spin effects observed in high-energy exclusive reactions pose severe problems for the pure quark picture of baryons and might be explained by the introduction of diquarks as hadronic constituents. There is considerable controversy, not about the existence of diquarks in hadrons, but about their properties and their effects. In this work a broad selection of the main ideas about diquarks is reviewed.

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Section: Soft Hadronic Processesmentioning

confidence: 99%

Diquarks

et al. 1993

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“…We extended the quark-diquark cascade model [41] to include the spin dependence by using SU (6) wave functions for hadrons and the quark-diquark representation for baryons as discussed in Ref. [42].…”

Section: Introduction Of Spin Into the Incident Baryon And The Cascad...mentioning

confidence: 99%

“…The factors 1.5, 2.0 and 1.75 are extracted from the analysis of hadron spectra in p fragmentation region. [41] The transverse momentum distribution of the hadron H in the cascade processes is given by the distribution function…”

Section: Introduction Of Spin Into the Incident Baryon And The Cascad...mentioning

confidence: 99%

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ANTI-HYPERON POLARIZATION IN pA AND Σ^-A COLLISIONS AND INTRINSIC ANTIDIQUARK STATE IN INCIDENT BARYON

Noda

Tashiro

Nakariki

2012

Int. J. Mod. Phys. E

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We discuss the relation between the polarization of inclusively produced (anti)hyperons and the incident baryon states in the framework of the constituent quark-diquark cascade model. We assume that there is an intrinsic diquark-antidiquark state in the incident baryon, in which the intrinsic diquark immediately fragments into a non-leading baryon and the antidiquark behaves as a valence constituent. It is also assumed that the valence (anti)diquark in the incident nucleon tends to combine selectively with a spin-down sea quark and, on the other hand, the spin-up valence quark in the projectile is chosen by a sea (anti)diquark in preference to the spin-down valence quark. It is found that the incident spin-1/2 baryon is mainly composed of a spin-0 valence diquark and a valence quark, and contains an intrinsic diquark-antidiquark state with a probability of about 7%.

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“…The production of strange or heavy quarks and their subsequent hadronization in hadron-hadron collisions constitute an important benchmark test for QCD-inspired phenomenological models [1][2][3][4][5] describing soft phenomena and the applicability of perturbative QCD to hard processes. Using, for example, projectiles with different flavour contents, the role of valence quarks can be explored [1,3,6].…”

Section: Introductionmentioning

confidence: 99%

Ξ− production by Σ−. π− and neutrons in the hyperon beam experiment WA89 at CERN

Heidrich

1997

Nuclear Physics B - Proceedings Supplements

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Inclusive cross sections for Ξ − hyperon production in high-energy Σ − , π − and neutron induced interactions were measured by the experiment WA89 at CERN. Secondary Σ − and π − beams with average momenta of 345 GeV/c and a neutron beam of average momentum 65 GeV/c were produced by primary protons of 450 GeV/c from the CERN SPS. Both single and double differential cross sections are presented as a function of the transverse momentum and the Feynman variable x F. A strong leading effect for Ξ − produced by Σ − is observed. The influence of the target mass on the Ξ − cross section is explored by comparing reactions on copper and carbon nuclei.

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Single-particle spectra in soft hadron-hadron interactions and two-component cascade model

Cited by 13 publications

References 42 publications

Diquarks

Diquarks

ANTI-HYPERON POLARIZATION IN pA AND Σ^-A COLLISIONS AND INTRINSIC ANTIDIQUARK STATE IN INCIDENT BARYON

Ξ− production by Σ−. π− and neutrons in the hyperon beam experiment WA89 at CERN

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Single-particle spectra in soft hadron-hadron interactions and two-component cascade model

Cited by 13 publications

References 42 publications

Diquarks

Diquarks

ANTI-HYPERON POLARIZATION IN pA AND Σ-A COLLISIONS AND INTRINSIC ANTIDIQUARK STATE IN INCIDENT BARYON

Ξ− production by Σ−. π− and neutrons in the hyperon beam experiment WA89 at CERN

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Product

Resources

About

ANTI-HYPERON POLARIZATION IN pA AND Σ^-A COLLISIONS AND INTRINSIC ANTIDIQUARK STATE IN INCIDENT BARYON