Low-lying even parity meson resonances and spin-flavor symmetry revisited

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	Low-lying even parity meson resonances and spin-flavor symmetry revisited
	Garcia-Recio, C ; Geng, LS ; Nieves, J ; Salcedo, LL ; Wang, E ; Xie, JJ
刊名	PHYSICAL REVIEW D
	2013
卷号	87 期号:9 页码:96006
关键词	CHIRAL PERTURBATION-THEORY INVERSE AMPLITUDE METHOD BETHE-SALPETER APPROACH PI-PI SCATTERING-AMPLITUDE DISPERSION-RELATIONS LAGRANGIANS QUARK LENGTHS MODEL
ISSN号	1550-7998
通讯作者	Garcia-Recio, C (reprint author), Univ Granada, Dept Fis Atom Mol & Nucl, E-18071 Granada, Spain.
英文摘要	We review and extend the model derived in Garcia-Recio et al. [Phys. Rev. D 83, 016007 (2011)] to address the dynamics of the low-lying even-parity meson resonances. This model is based on a coupled-channels spin-flavor extension of the chiralWeinberg-Tomozawa Lagrangian. This interaction is then used to study the S-wave meson-meson scattering involving members not only of the pi octet, but also of the rho nonet. In this work, we study in detail the structure of the SU(6)-symmetry-breaking contact terms that respect (or softly break) chiral symmetry. We derive the most general local (without involving derivatives) terms consistent with the chiral-symmetry-breaking pattern of QCD. After introducing sensible simplifications to reduce the large number of possible operators, we carry out a phenomenological discussion of the effects of these terms. We show how the inclusion of these pieces leads to an improvement of the description of the J(P) = 2(+) sector, without spoiling the main features of the predictions obtained in the original model in the JP = 0(+) and J(P) = 1(+) sectors. In particular, we find a significantly better description of the I-G(J(PC)) =0(+)(2(++)), 1(-)(2(++)) and the I(JP)=1/2(2(+)) sectors, which correspond to the f(2)(1270), a(2)(1320), and K-2(*)(1430) quantum numbers, respectively.
学科主题	Physics
收录类别	SCI
原文出处	http://dx.doi.org/10.1103/PhysRevD.87.096006
语种	英语
WOS记录号	WOS:000319059500004
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15365]
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	Garcia-Recio, C,Geng, LS,Nieves, J,et al. Low-lying even parity meson resonances and spin-flavor symmetry revisited[J]. PHYSICAL REVIEW D,2013,87(9):96006.
APA	Garcia-Recio, C,Geng, LS,Nieves, J,Salcedo, LL,Wang, E,&Xie, JJ.(2013).Low-lying even parity meson resonances and spin-flavor symmetry revisited.PHYSICAL REVIEW D,87(9),96006.
MLA	Garcia-Recio, C,et al."Low-lying even parity meson resonances and spin-flavor symmetry revisited".PHYSICAL REVIEW D 87.9(2013):96006.