Quark Model and High Energy Collisions

“…( 1) remains to be a difficult problem since the experimental data are scarce. According to a recent classification of hadrons on the (J, M 2 ) plane [6], the overwhelming majority of the trajectories are supported by a few data points only. For mesons, there exist five trajectories with three data points, while other trajectories were hypothesized from two or one data points.…”

Section: Introductionmentioning

confidence: 99%

Regularities in hadron systematics, Regge trajectories and a string quark model

Levchenko

2007

Phys. Rev. D

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An empirical principle for the construction of a linear relationship between the total angular momentum and squared-mass of baryons is proposed. In order to examine linearity of the trajectories, a rigorous least-squares regression analysis was performed. Unlike the standard Regge-Chew-Frautschi approach, the constructed trajectories do not have non-linear behaviour. A similar regularity may exist for lowest-mass mesons. The linear baryonic trajectories are well described by a semi-classical picture based on a spinning relativistic string with tension. The obtained numerical solution of this model was used to extract the (di)quark masses.

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“…In general the linear map D a b (p, q) is a composition of phase space integrals, 4-momentum conservation and decay matrix elements for each successive decay in the decay cascade [19,29]. Most of the listed decays or hadron resonances in the Particle Data Group book [21] are 2body and 3-body decays, which in heavy ion simulations are customary approximated as isotropic decays with a branching ratio B.…”

Section: Lorentz Invariant Decay Mapmentioning

confidence: 99%

Fast resonance decays in nuclear collisions

et al. 2019

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In the context of ultra-relativistic nuclear collisions, we present a fast method for calculating the final particle spectra after the direct decay of resonances from a Cooper-Frye integral over the freeze-out surface. The method is based on identifying components of the final particle spectrum that transform in an irreducible way under rotations in the fluid-restframe. Corresponding distribution functions can be pre-computed including all resonance decays. Just a few of easily tabulated scalar functions then determine the Lorentz invariant decay spectrum from each space-time point, and simple integrals of these scalar functions over the freeze-out surface determine the final decay products. This by-passes numerically costly event-by-event calculations of the intermediate resonances. The method is of considerable practical use for making realistic data to model comparisons of the identified particle yields and flow harmonics, and for studying the viscous corrections to the freeze-out distribution function.

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Quark Model and High Energy Collisions

Cited by 52 publications

References 0 publications

Dispersion representations and anomalous singularities of the triangle diagram

Dispersion representations and anomalous singularities of the triangle diagram

Regularities in hadron systematics, Regge trajectories and a string quark model

Fast resonance decays in nuclear collisions

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