Pion and Kaon Valence-quark Parton Quasidistributions

Xu, Shu-Sheng; Chang, Lei; Roberts, Craig D.; Zong, Hong-shi

doi:10.1103/PhysRevD.97.094014

Title: Pion and Kaon Valence-quark Parton Quasidistributions

Journal Article · Wed May 16 00:00:00 EDT 2018 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.97.094014· OSTI ID:1461490

Xu, Shu-Sheng ^[1]; Chang, Lei ^[2]; Roberts, Craig D. ^[3]; Zong, Hong-shi ^[4]

Nanjing Univ. (China). Dept. of Physics
Nankai Univ., Tianjin (China). School of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
Nanjing Univ. (China). Dept. of Physics; Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing (China)

Algebraic Ansatze for the Poincare-covariant Bethe-Salpeter wave functions of the pion and kaon arc used to calculate their light-front wave functions, parton distribution amplitudes, parton quasidistribution amplitudes, valence parton distribution functions, and parton quasidistribution functions (PqDFs). The light-front wave functions arc broad, concave functions, and the scale of flavor-symmetry violation in the kaon is roughly 15%, being set by the ratio of emergent masses in the s- and u-quark sectors. Parton quasidistribution amplitudes computed with longitudinal momentum P_z = 1.75 GeV provide a semiquantitatively accurate representation of the objective parton distribution amplitude, but even with P_z = 3 GeV, they cannot provide information about this amplitude's end point behavior. On the valence-quark domain, similar outcomes characterize PqDFs. Lastly, in this connection, however, the ratio of kaon-to-pion u-quark PqDFs is found to provide a good approximation to the true parton distribution function ratio on 0.4 ≲ x ≲ 0.8, suggesting that with existing resources computations of ratios of parton quasidistributions can yield results that support empirical comparison.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1461490

Alternate ID(s):: OSTI ID: 1437330

Journal Information:: Physical Review D, Vol. 97; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 46 works

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