Hybrid and Conventional Baryons in the Flux-Tube Model
نویسنده
چکیده
Abstract Conventional and hybrid light quark baryons are constructed in the non-relativistic flux-tube model of Isgur and Paton, which is motivated by lattice QCD. The motion of the flux tube with the three quark positions fixed, except for center of mass corrections, is discussed. It is shown that the problem can be reduced to the independent motion of the junction and the strings connecting the junction to the quarks. The important role played by quark-exchange symmetry in constraining the flavor structure of (hybrid) baryons is emphasized. The flavor, quark spin S and JP of the seven low-lying hybrid baryons are found to be (N,∆)2S+1JP = N2 1 2 + , N2 32 + , ∆4 12 + , ∆4 3 2 + , ∆4 52 + , where the N2 1 2 + and N2 32 + states are doublets. The motion of the three quarks in an adiabatic potential derived from the flux-tube dynamics is considered. A mass of 1870 ± 100 MeV for the lightest nucleon hybrids is found by employing a variational method.
منابع مشابه
HYBRID BARYONS a
We review the status of hybrid baryons. The only known way to study hybrids rigorously is via excited adiabatic potentials. Hybrids can be modelled by both the bag and flux–tube models. The low–lying hybrid baryon is N 1 2 + with a mass of 1.5 − 1.8 GeV. Hybrid baryons can be produced in the glue–rich processes of diffractive γN and πN production, Ψ decays and p¯ p annihilation.
متن کاملThe Effect of Linear Change of Tube Diameter on Subcooled Flow Boiling and Critical Heat Flux
One of the major industry problems is the flow boiling, where reaching to the critical heat flux (CHF) condition can lead to a temperature jump and damage of the systems. In the present study, the effects of a uniform change in tube diameter on subcooled flow boiling and CHF was numerically investigated. The Euler-Euler model was used to investigate the relationship between the two liquid and v...
متن کاملHybrid Baryons, a Brief Review
This contribution is a brief review of the status of hybrid baryons, which are hypothetical baryons that incorporate a gluonic excitation. We first summarize the status of hybrid mesons, since this closely related topic has seen considerable recent activity with the identification of two exotic candidates. Next we review theoretical expectations for the masses and quantum numbers of hybrid bary...
متن کاملField Oriented Control of Dual Mechanical Port Machine for Hybrid Electric Vehicle
A dual mechanical port machine (DMPM) is used as an electrically variable transmission (EVT) in hybrid electric vehicle (HEV). In the conventional HEV, this machine is replaced by a planetary gearbox and two electric machines and makes this structure simpler. This paper presents field oriented control (FOC) for DMPM. For HEV application, drive efficiency and wide operating speed range are impor...
متن کاملImprovement of Die Corner Filling of Stepped Tubes Using Warm Hybrid Forming
Aluminum and magnesium alloys are of materials for decreasing vehicle weight and consequently reducing fuel consumption. However, forming limitations regarding their low formability at room temperature are found when being manufactured by conventional forming processes. For this reason, development of new forming techniques, such as warm tube hydroforming, is needed to overcome such limitations...
متن کامل