Mesonic parton densities derived from constituent quark model constraints
نویسندگان
چکیده
منابع مشابه
Mesonic Parton Densities Derived From Constituent Quark Model Constraints
Using constituent quark model constraints we calculate the gluon and sea content of pions solely in terms of their valence density and the known sea and gluon densities of the nucleon. The resulting small-x predictions for g(x,Q) and q̄(x,Q) are unique and parameter free, being entirely due to QCD dynamics. Similar ideas are applied for calculating the gluon and sea content of kaons which, for o...
متن کاملGeneralized Parton Distributions in the Light-Front Constituent Quark Model
The Generalized Parton Distributions (GPDs) of the nucleon are analyzed within the relativistic constituent quark model formulated on the light-front. It is shown that the matrix elements of the plus component of the one-body vector current are plagued by spurious effects related to the dependence on the hyperplane where the nucleon wave function is defined in terms of its constituents. The phy...
متن کاملParton distributions in a constituent quark scenario
A simple picture of the constituent quark as a composite system of point-like partons is used to construct the unpolarized and polarized parton distributions by a convolution between constituent quark momentum distributions and constituent quark structure functions. We achieve good agreement with experiments in the unpolarized, as well as, in the polarized case. When our results are compared wi...
متن کاملStrange Mesonic Transition Form Factor in the Chiral Constituent Quark Model
The form factor g (S) ρπ (Q2) of the strange vector current transition matrix element 〈ρ|s̄γμs|π〉 is calculated within the chiral quark model. A strange vector current of the constituent U andD-quarks is induced by kaon radiative corrections and this mechanism yields the nonvanishing values of g (S) ρπ (0). The numerical result at the photon point is consistent with the one given by the φ-meson ...
متن کاملChiral-odd generalized parton distributions in constituent quark models
We derive the overlap representation of chiral-odd generalized parton distributions using the Fock-state decomposition in the transverse-spin basis. This formalism is applied to the case of light-cone wave functions in a constituent quark model. Numerical results for the four chiral-odd generalized parton distributions at the hadronic scale are shown in different kinematics. In the forward limi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 1998
ISSN: 1434-6044,1434-6052
DOI: 10.1007/s100520050130