Spin content of the nucleon in a valence and sea quark mixing model
نویسندگان
چکیده
A dynamical valence and sea quark mixing model is shown to fit the baryon ground state properties as well as the spin content of the nucleon. The relativistic correction and the q3↔q3qq̄ transition terms induced by the quark axial vector current ψ̄~γγ5ψ in this model space is responsible for the quark spin reduction. 14.20.Dh, 12.39.Jh, 12.39.Pn, 24.85.+p Typeset using REVTEX
منابع مشابه
Hermes Measurement of the Spin Structure of the Nucleon
The HERMES experiment at the DESY Laboratory in Hamburg, Germany is designed to probe the spin structure of the nucleon by using deep inelastic scattering (DIS) of longitudinally polarized positrons on longitudinally and transversely polarized targets. The HERMES spectrometer has the ability to not only identify the scattered DIS positrons but as well the hadrons in coincidence with the scatter...
متن کاملA / G V , < r 2 n > and μ p , n in χ QM with One Gluon Generated Configuration Mixing
The spin polarization functions (∆u, ∆d, ∆s) for proton are calculated in the chiral quark model (χQM) with SU(3) symmetry breaking as well as configuration mixing generated by one gluon exchange forces for the NMC and the most recent E866 data. Besides reproducing the spin polarization functions ∆u, ∆d, ∆s as well as GA/GV , it can accomodate nucleon magnetic moments and neutron charge radius ...
متن کاملAnalyzing the nucleon spin in weak interaction processes at HERA energies
We investigate the possibility to measure the spin content carried by the different quark flavors in a nucleon by means of polarized deep inelastic scattering with W exchange at HERA. Such measurements require a polarized proton beam. The expected inclusive and semi inclusive asymmetries are sizable and for realistic luminosities the expected statistical accuracies are good enough to extract ne...
متن کاملA QUARTIC POTENTIAL FOR THE NUCLEONIC QUARKS
We assume that each valence quark in a nucleon is in a phenomenological modified harmonic oscillator potential of the form: ( l+yo) (ar +br+cr +dr ), where a, b, c and d are constants and ? is one of the Dirac matrices. Then by making use of a suitable ansatz, the Dirac equation has a very simple solution which is exact. We then have calculated the static properties of the nucleon in the ...
متن کاملThe Proton Spin Structure in a Light-cone Quark-spectator-diquark Model
It is shown that the proton spin problem raised by the Ellis-Jaffe sum rule violation does not in conflict with the SU(6) quark model, provided that the relativistic effect from the quark transversal motions, the flavor asymmetry between the u and d valence quarks, and the intrinsic quark-antiquark pairs generated by the nonperturbative meson-baryon fluctuations of the nucleon sea are taken int...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998