Dissertation > Excellent graduate degree dissertation topics show
The Study of NΣ and NΛ Interaction
Author: ZhuLiNan
Tutor: DaiLianRong
School: Liaoning Normal University
Course: Theoretical Physics
Keywords: extended chiral SU(3) quark model nucleonhuperon vector meson exchange
CLC: O572.33
Type: Master's thesis
Year: 2008
Downloads: 7
Quote: 0
Read: Download Dissertation
Abstract
Content:In the chiral SU(3) quark model,we use the coupling between quarks and nonet scalar meson fields and nonet pseudoscalar meson fields to describe the medium and long rang interactions,and use one gluon exchange to describe the short range interacton. In the extended chiral SU(3) quark model,besides the nonet pseudoscalar meson fields and the nonet scalar meson fields,the coupling between vector meson fields and quarks is also considered,the short range interaction can be described dominately by vector meson exchange,therefore,the mechanisems between these two models are totally different.In this paper,nucleonhyperon interaction has been investigated within the framework of the extended chiral SU(3) quark model using the resonating group method(RGM). Firstly,we study the N∑scattering process.The the S,P,Dand Fwave phase shifts of NΣare given,the results shows that the NΣinteraction can be described either by chiral SU(3) quark model or by extended chiral SU(3) quark model,their results are similar.We further compare the GCM matrix elements of vector meson(K~*,ρ,ω,andφ) in the extended chiral SU(3) quark model to those of one gluon exchange in the chiral SU(3) quark model,the results shows the different short range interactioncontribute the NΣscattering process.When we consider the partial wave coupling,the tensor force provides attraction in Swave interaction,but repulsion in Dwave interaction.Then we investigate the N∧scattering process,the qualitative conclusion is similar to that of NΣscattering process.This means N∧interaction can be described either by chiral SU(3) quark model or by extended chiral SU(3) quark model.When we consider partial wave coupling,the tensor force provides attraction.When we consider channel coupling,the effect from channel coupling also provides attraction.After we consider partial wave coupling and channel coupling,the attraction can be enhanced and consequently,the phase shifts can be enhanced.In summary,by studying the NΣand N∧scattering process,we found that the shortrange interaction of NΣand N∧systems can be described either by the onegluon exchange or vector meson exchange.

Related Dissertations
 The Study of Multiquark State,O572.33
 Charmed meson decays and CP violation phenomenological study,O572.33
 LHT model top quark rare threebody decay t → cf ~f process research,O572.33
 With pQCD method B_c ~ → B_sπ ~ decay,O572.33
 Exotic baryon octet electromagnetic form factor of the dipole formula,O572.33
 The Strong Interactions Potential for Two Quarks,O572.33
 Linear Sigma model Scalar mesons,O572.33
 The study of rare decays of B mesons,O572.33
 The Spectral Function Anddissociation of Heavy Quarkonium in Strong Coupling Coulomb Potential,O572.33
 Analysis of the Y(4140) and Related Molecular States with QCD Sum Rules,O572.33
 The Breit potential plus linear potential radiative transition under the bottom of positronium,O572.33
 Topcolor assisted technicolor model predicted boson and the LHC top quark pair production,O572.33
 Discussion meson  meson scattering problem,O572.33
 Heavy meson to light Pwave meson decay as examples,O572.33
 U (3) × U (3) linear sigma model,O572.33
 Heat medium properties of heavy quarkonium,O572.33
 Baryon Spectrum in the Chiral SU(3) Quark Model,O572.33
 Dynamically Generated States from the Pseudoscalarvector and Light Vectorscharmed Baryons Interaction,O572.33
 Measure η_c Mass and Width and Reconstruction Efficiency of Low Momentum π~0,O572.33
 Coupled channel effects in heavy meson systems,O572.33
 Few questions scattering calculations,O572.33
CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > Highenergy physics > Particle types > Meson
© 2012 www.DissertationTopic.Net Mobile
