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Kaon quark distribution functions in the chiral constituent quark model

Akira Watanabe
(
)
,
Takahiro Sawada
(
- Michigan U.
)
,
Chung Wen Kao
(
- Taiwan, Chung Yuan Christian U.
)

Oct 25, 2017

11 pages

Published in:

Phys.Rev.D 97 (2018) 7, 074015

Published: Apr 16, 2018

e-Print:

1710.09529 [hep-ph]

DOI:

10.1103/PhysRevD.97.074015

Report number:

CYCU-17-09

View in:

ADS Abstract Service

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Abstract: (APS)

We investigate the valence u and s¯ quark distribution functions of the K+ meson, vK(u)(x,Q2) and vK(s¯)(x,Q2), in the framework of the chiral constituent quark model. We judiciously choose the bare distributions at the initial scale to generate the dressed distributions at the higher scale, considering the meson cloud effects and the QCD evolution, which agree with the phenomenologically satisfactory valence quark distribution of the pion and the experimental data of the ratio vK(u)(x,Q2)/vπ(u)(x,Q2). We show how the meson cloud effects affect the bare distribution functions in detail. We find that a smaller SU(3) flavor symmetry breaking effect is observed, compared with results of the preceding studies based on other approaches.

Note:

13 pages, 8 figures

K+
quark model: chiral
quark model: constituent
quark: valence
quark: distribution function
parton: distribution function
meson: cloud
quantum chromodynamics
symmetry breaking: chiral
symmetry breaking: flavor

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Figures(12)

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