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Mass formula
About: Mass formula is a research topic. Over the lifetime, 1248 publications have been published within this topic receiving 22043 citations.
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TL;DR: In this article, tensor representations of baryon multiplets are discussed together with some applications to weak decay processes, especially for degenerate representations, and mass formulas for SU(4) and SU(8) groups are obtained.
Abstract: Mass formulas for SU(4) and SU(8) groups have been obtained and are especially simple for degenerate representations. Also, tensor representations of baryon multiplets are discussed together with some applications to weak decay processes.
39 citations
TL;DR: A simple hybrid quark-diquark model for the baryons is constructed as a partial solution to the well-known ''missing resonances'' problem in this article.
Abstract: A simple hybrid quark-diquark model for the baryons is constructed as a partial solution to the well-known ``missing resonances'' problem. In this model, the quark-diquark approach is merged with the usual constituent three-quark model. The underlying idea is that the quark-diquark approach describes the excited states while the three-quark model the ground states. The spectrum is calculated through a mass formula, a generalization of the G\"ursey-Radicati formula, built to reproduce the rotational and vibrational Regge trajectories. Using the quark-diquark scheme, we were also able to describe the spin-flavor degrees of freedom in the framework of an algebraic model. Moreover, we have constructed a complete classifications of the possible quark-diquark states only based on group theory and thus it can be useful both for other model builders and for experimentalists.
38 citations
TL;DR: In this article, the α s 3 correction to the two-point function of the pseudoscalar gluon currents was presented, and the obtained information was used to determine the relation between the scales of the Gluon and quark channels.
38 citations
TL;DR: In this paper, a simultaneous description of nonstrange nuclei and hypernuclei is provided by a single mass formula inspired by the spin-flavour SU(6) symmetry breaking.
Abstract: A simultaneous description of non-strange nuclei and hypernuclei is provided by a single mass formula inspired by the spin-flavour SU(6) symmetry breaking. This formula is used to estimate the hyperon binding energies of Lambda, double Lambda, Sigma, Cascade and Theta hypernuclei. The results are found to be in good agreement with the available experimental data on 'bound' nuclei and relativistic as well as quark mean field calculations. This mass formula is useful to estimate binding energies over a wide range of masses including the light mass nuclei. It is not applicable for repulsive potential.
38 citations
TL;DR: In this article, the average energy of SU(6) multiplet is described using a hypercentral potential containing a linear and a hyper-Coulomb term, which is the same as in this paper.
Abstract: We study the spin- and flavour-dependent SU(6) violations in the baryon spectrum by means of a Gursey-Radicati mass formula. The average energy of each SU(6) multiplet is described using the SU(6)-invariant interaction given by a hypercentral potential containing a linear and a hyper-Coulomb term. We show that the nonstrange- and strange-baryon masses are, in general, fairly well reproduced and moreover that the Gursey-Radicati formula holds in a satisfactory way also for the excited states up to 2 GeV.
37 citations