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题名: Low-lying even parity meson resonances and spin-flavor symmetry revisited
作者: Garcia-Recio, C ;  Geng, LS ;  Nieves, J ;  Salcedo, LL ;  Wang, E ;  Xie, JJ
刊名: PHYSICAL REVIEW D
出版日期: 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
学科分类: Physics
通讯作者: Garcia-Recio, C (reprint author), Univ Granada, Dept Fis Atom Mol & Nucl, E-18071 Granada, Spain.
部门归属: [Garcia-Recio, C.; Salcedo, L. L.] Univ Granada, Dept Fis Atom Mol & Nucl, E-18071 Granada, Spain; [Garcia-Recio, C.; Salcedo, L. L.] Univ Granada, Inst Carlos Fis Teor & Computac 1, E-18071 Granada, Spain; [Geng, L. S.] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China; [Nieves, J.; Wang, En] Univ Valencia, CSIC, Inst Invest Paterna, Inst Fis Corpuscular IFIC,Ctr Mixto, E-46071 Valencia, Spain; [Xie, Ju-Jun] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China; [Xie, Ju-Jun] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
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.
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000319059500004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15365
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
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.
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