A Primary Study of Heavy Baryons Λ _Q , Σ _Q , Ξ _Q and Ω _Q

Abstract

We perform a preliminary study of the 1 2 + and 3 2 + ground-state baryons containing a heavy quark in the framework of the chiral SU(3) quark model. By using the calculus of variations, masses of Λ𝑄, Σ𝑄, Ξ𝑄, Ω𝑄, Σ * 𝑄 , Ξ * 𝑄 and Ω * 𝑄 , where 𝑄 means 𝑐 or 𝑏 quark, are calculated. By taking reasonable model parameters, the numerical results of established heavy baryons are generally in agreement with the experimental data available, except that those of Ξ𝑄 are somewhat heavier. For Ω 𝑏 with undetermined experimental mass and unobserved Ξ * 𝑏 , Ω * 𝑏 , reasonable theoretical predictions are obtained. Interactions inside baryons are also discussed.

Light cone QCD sum rules study of the semileptonic heavy ΞQ and Ξ′Q transitions to Ξ and Σ baryons

“…Hx, 13.30.Ce, 14.20.Mr, 14.20 Such an experimental progress stimulates the theoretical studies on properties of the heavy baryons as well as their electromagnetic, weak and strong transitions. The mass spectrum of the heavy baryons has been studied using various methods including heavy quark effective theory [2], QCD sum rules [3][4][5][6] and some other phenomenological models [7][8][9][10][11][12]. Some electromagnetic properties of the heavy baryons and their radiative decays have been investigated in different frameworks in [6,[13][14][15][16][17][18][19][20][21][22][23][24].…”

An investigation into the stability of microemulsions in electrophoresis

“…Moreover, the existence of many unexpected phenomena seems to be the result of a change in the properties of the ME droplet. This assumption was based on the finding that either the structure or optical activity of a ME droplet may be changed under an external electric field [7][8][9][10].…”

“…Electric-field effects on a ME droplet have been studied by Edwards et al [7]. Zhao et al [8] used laser diffraction methods to demonstrate that water-in-oil MEs and emulsions under an electric field present diffraction patterns and optical activities, which can be tuned by an external electric field. Under an external electric field, the polarized water droplets may deform and/or -align along the electric field so that three-dimensional periodic structures are formed in the MEs and emulsions.…”

A novel gastric release PEG‐enclatherated polymethacrylate‐based memblet system

“…Hydrogels are defined as three-dimensional hydrophilic polymer networks, which when in their swollen state, have the capability to retain water and swell to a much larger size than their original state. 27,28 Physical ionic plasticizing occurred between the ether functional group (anionic) of PEG 4000 and the dimethyl aminoethyl methacrylate functional group (cationic) of Eudragit E100 resulting in an interpolyelectrolyte complex hydrogel. Hydrogel A consisted of a higher degree of saturation of functional groups, with regard to plasticizing, that resulted in a dense accumulation of PEG 4000 to produce a more rigid structure.…”