Resonance effects in pion and kaon decay constants

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	Resonance effects in pion and kaon decay constants
	Guo, ZH; Sanz-Cillero, JJ
刊名	PHYSICAL REVIEW D
	2014
卷号	89 期号:9 页码:94024
关键词	CHIRAL PERTURBATION-THEORY LOW-ENERGY CONSTANTS ONE-LOOP CHI POLE ANALYSIS LATTICE QCD QUARK LAGRANGIANS AMPLITUDES PHYSICS MESONS
ISSN号	1550-7998
通讯作者	Guo, ZH (reprint author), Hebei Normal Univ, Dept Phys, Shijiazhuang 050024, Peoples R China.
英文摘要	In this article we study the impact of the lightest vector and scalar resonance multiplets in the pion and kaon decay constants up to next-to-leading order in the 1/N-C expansion, i.e., up to the one-loop level. The F-pi and F-K predictions obtained within the framework of resonance chiral theory are confronted with lattice simulation data. The vector loops (and the rho - pi pi coupling G(V) in particular) are found to play a crucial role in the determination of the chiral perturbation theory couplings L-4 and L-5 at next-to-leading order in 1/N-C. Puzzling, values of GV less than or similar to 40 MeV seem to be necessary to agree with current phenomenological results for L-4 and L-5. Conversely, a value of G(V) greater than or similar to 60 MeV compatible with standard rho - pi pi determinations turns these chiral couplings negative. However, in spite of the strong anti-correlation with L-4, the SU(3) chiral coupling F-0 remains stable all the time and stays within the range 78 similar to 86 MeV when G(V) is varied in a wide range, from 40 up to 70 MeV. Finally, we would like to remark that the leading order expressions used in this article for the eta - eta' mixing, mass splitting of the vector multiplet masses and the quark mass dependence of the rho(770) mass are found in reasonable agreement with the lattice data.
学科主题	Physics
收录类别	SCI
资助信息	National Natural Science Foundation of China (NSFC) [11105038]; Natural Science Foundation of Hebei Province [A2011205093]; Doctor Foundation of Hebei Normal University [L2010B04]; Spanish Government; ERDF funds from the European Commission [FPA2010-17747, SEV-2012-0249, CSD2007-00042]; Comunidad de Madrid [HEPHACOS S2009/ESP-1473]
原文出处	http://dx.doi.org/10.1103/PhysRevD.89.094024
语种	英语
WOS记录号	WOS:000336760000003
公开日期	2015-06-03
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15756]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Guo, ZH,Sanz-Cillero, JJ. Resonance effects in pion and kaon decay constants[J]. PHYSICAL REVIEW D,2014,89(9):94024.
APA	Guo, ZH,&Sanz-Cillero, JJ.(2014).Resonance effects in pion and kaon decay constants.PHYSICAL REVIEW D,89(9),94024.
MLA	Guo, ZH,et al."Resonance effects in pion and kaon decay constants".PHYSICAL REVIEW D 89.9(2014):94024.