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Flavour symmetry breaking in the kaon parton distribution amplitude
Shi, C; Chang, L; Roberts, CD; Schmidt, SM; Tandy, PC; Zong, HS; Roberts, CD (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
2014
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号738期号:-页码:512-518
摘要We compute the kaon's valence-quark (twist-two parton) distribution amplitude (PDA) by projecting its Poincare-covariant Bethe-Salpeter wave-function onto the light-front. At a scale zeta = 2GeV, the PDA is abroad, concave and asymmetric function, whose peak is shifted 12-16% away from its position in QCD's conformal limit. These features are a clear expression of SU(3)-flavour-symmetry breaking. They show that the heavier quark in the kaon carries more of the bound-state's momentum than the lighter quark and also that emergent phenomena in QCD modulate the magnitude of flavour-symmetry breaking: it is markedly smaller than one might expect based on the difference between light-quark current masses. Our results add to a body of evidence which indicates that at any energy scale accessible with existing or foreseeable facilities, a reliable guide to the interpretation of experiment requires the use of such nonperturbatively broadened PDAs in leading-order, leading-twist formulae for hard exclusive processes instead of the asymptotic PDA associated with QCD's conformal limit. We illustrate this via the ratio of kaon and pion electromagnetic form factors: using our nonperturbative PDAs in the appropriate formulae, F-K/F-pi = 1.23 at spacelike-Q(2) = 17 GeV2, which compares satisfactorily with the value of 0.92(5) inferred in e(+)e(-) annihilation at s = 17GeV(2). (C) 2014 Argonne National Laboratory and the authors. Published by Elsevier B. V.
部门归属[Shi, Chao] Nanjing Univ, Inst Acoust, Key Lab Modern Acoust, MOE, Nanjing 210093, Jiangsu, Peoples R China
关键词Dyson-schwinger Equations Pion Form-factor Quantum Chromodynamics Exclusive Processes Su(3) Breaking Qcd Mesons Factorization Confinement Behavior
学科领域Physics
资助者International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187]
DOI10.1016/j.physletb.2014.07.057
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收录类别SCI
语种英语
资助者International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187] ; International Fellow Award from the Helmholtz Association; National Natural Science Foundation of China [11275097, 11274166]; National Basic Research Program of China [2012CB921504]; Research Fund for the Doctoral Program of Higher Education (China) [2012009111002]; University of Adelaide; Australian Research Council [FL0992247]; Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; Forschungszentrum Julich GmbH; National Science Foundation [NSF-PHY1206187]
WOS记录号WOS:000344624900077
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15578
专题理论物理所SCI论文
通讯作者Roberts, CD (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
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Shi, C,Chang, L,Roberts, CD,et al. Flavour symmetry breaking in the kaon parton distribution amplitude[J]. PHYSICS LETTERS B,2014,738(-):512-518.
APA Shi, C.,Chang, L.,Roberts, CD.,Schmidt, SM.,Tandy, PC.,...&Roberts, CD .(2014).Flavour symmetry breaking in the kaon parton distribution amplitude.PHYSICS LETTERS B,738(-),512-518.
MLA Shi, C,et al."Flavour symmetry breaking in the kaon parton distribution amplitude".PHYSICS LETTERS B 738.-(2014):512-518.
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