Octet baryon electromagnetic form factors in a relativistic quark model

被引：35
|
作者：
Ramalho, G. [1 ]
Tsushima, K. [2 ]
机构：
[1] Univ Tecn Lisboa, Inst Super Tecn, CFTP, P-1049001 Lisbon, Portugal
[2] Univ Adelaide, Sch Chem & Phys, CSSM, Adelaide, SA 5005, Australia
来源：
PHYSICAL REVIEW D | 2011年 / 84卷 / 05期
基金：
澳大利亚研究理事会;
关键词：
CHIRAL-BAG MODEL; MAGNETIC-MOMENTS; PION CLOUD; NUCLEON; NEUTRON; BREAKING; SYMMETRY; HYPERONS; E'N)P;
D O I：
10.1103/PhysRevD.84.054014
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the octet baryon electromagnetic properties by applying the covariant spectator quark model, and provide covariant parametrization that can be used to study baryon electromagnetic reactions. While we use the lattice QCD data in the large pion mass regime (small pion cloud effects) to determine the parameters of the model in the valence quark sector, we use the nucleon physical and octet baryon magnetic moment data to parametrize the pion cloud contributions. The valence quark contributions for the octet baryon electromagnetic form factors are estimated by extrapolating the lattice parametrization in the large pion mass regime to the physical regime. As for the pion cloud contributions, we parametrize them in a covariant, phenomenological manner, combined with SU(3) symmetry. We also discuss the impact of the pion cloud effects on the octet baryon electromagnetic form factors and their radii.
引用
收藏
页数：28
相关论文
共 50 条
  • [1] Electromagnetic form factors of the baryon octet in the perturbative chiral quark model
    Cheedket, S
    Lyubovitskij, VE
    Gutsche, T
    Faessler, A
    Pumsa-ard, K
    Yan, Y
    [J]. EUROPEAN PHYSICAL JOURNAL A, 2004, 20 (02): : 317 - 327
  • [2] Electromagnetic form factors of the baryon octet in the perturbative chiral quark model
    S. Cheedket
    V. E. Lyubovitskij
    Th. Gutsche
    Amand Faessler
    K. Pumsa-ard
    Y. Yan
    [J]. The European Physical Journal A - Hadrons and Nuclei, 2004, 20 : 317 - 327
  • [3] Study of baryon octet electromagnetic form factors in perturbative chiral quark model
    Liu, X. Y.
    Khosonthongkee, K.
    Limphirat, A.
    Yan, Y.
    [J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2014, 41 (05)
  • [4] Baryon octet electromagnetic form factors in a confining NJL model
    Carrillo-Serrano, Manuel E.
    Bentz, Wolfgang
    Cloet, Ian C.
    Thomas, Anthony W.
    [J]. PHYSICS LETTERS B, 2016, 759 : 178 - 183
  • [5] Relativistic quark model for the Ω- electromagnetic form factors
    Ramalho, G.
    Tsushima, K.
    Gross, Franz
    [J]. PHYSICAL REVIEW D, 2009, 80 (03)
  • [6] Weak form factors for semileptonic octet baryon decays in the chiral quark model
    Ohlsson T.
    Snellman H.
    [J]. The European Physical Journal C - Particles and Fields, 1999, 6 (2): : 285 - 296
  • [7] Weak form factors for semileptonic octet baryon decays in the chiral quark model
    Ohlsson, T
    Snellman, H
    [J]. EUROPEAN PHYSICAL JOURNAL C, 1999, 6 (02): : 285 - 296
  • [8] Octet baryon electromagnetic form factors in nuclear medium
    Ramalho, G.
    Tsushima, K.
    Thomas, A. W.
    [J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2013, 40 (01)
  • [9] Electromagnetic form factors of hyperons in a relativistic quark model
    Van Cauteren, T
    Corthals, T
    Janssen, S
    Ryckebusch, J
    Merten, D
    Metsch, B
    Petry, HR
    [J]. NSTAR 2004: Proceedings of the Workshop on the Physics of Excited Nucleons, 2004, : 367 - 370
  • [10] Octet to decuplet electromagnetic transition in a relativistic quark model
    Ramalho, G.
    Tsushima, K.
    [J]. PHYSICAL REVIEW D, 2013, 87 (09):
12345