Parton distribution in pseudoscalar mesons with a light-front constituent quark model

We compute the distribution amplitudes of the pion and kaon in the light-front constituent quark model with the symmetric quark-bound state vertex function [1, 2, 3]. In the calculation we explicitly include the flavor-SU(3) symmetry breaking effect in terms of the constituent quark masses of the up...

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Main Authors: de Melo, J. P. B. C., Ahmed, Isthiaq, Tsushima, Kazuo
Format: Conference Proceeding
Language:English
Subjects:
Broken symmetry
Constituents
Distribution functions
Flavor (particle physics)
Mathematical models
Mesons
Quark models
Quarks
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Ahmed, Isthiaq
Tsushima, Kazuo
description We compute the distribution amplitudes of the pion and kaon in the light-front constituent quark model with the symmetric quark-bound state vertex function [1, 2, 3]. In the calculation we explicitly include the flavor-SU(3) symmetry breaking effect in terms of the constituent quark masses of the up (down) and strange quarks. To calculate the kaon parton distribution functions (PDFs), we use both the conditions in the light-cone wave function, i.e., when s ¯ quark is on-shell, and when u quark is on-shell, and make a comparison between them. The kaon PDFs calculated in the two different conditions clearly show asymmetric behaviour due to the flavor SU(3)-symmetry breaking implemented by the quark masses [4, 5].
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subjects Broken symmetry
Constituents
Distribution functions
Flavor (particle physics)
Mathematical models
Mesons
Quark models
Quarks
title Parton distribution in pseudoscalar mesons with a light-front constituent quark model
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