Mass splittings within heavy baryon isospin multiplets in chiral perturbation theory

被引：22

作者：

Guo, Feng-Kun ^{[1
,2
]}

Hanhart, Christoph ^{[1
,2
]}

Meissner, Ulf-G. ^{[1
,2
,3
,4
]}

机构：

[1] Forschungszentrum Julich, Inst Kernphys Theorie, Postfach 1913, D-52425 Julich, Germany

[2] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[3] Univ Bonn, Helmholtz Inst Strahlen Kernphy Theorie, D-53115 Bonn, Germany

[4] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2008年 / 09期

关键词：

NLO computations; chiral lagrangians; QCD;

D O I：

10.1088/1126-6708/2008/09/136

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We calculate the mass splittings within the heavy baryon isospin multiplets Sigma(c(b)) and Xi(')(c(b)) in chiral perturbation theory to leading one-loop order. The pattern of the mass splittings in the Sigma(c) iso-triplet, which is different from that of any other known isospin multiplet, can be explained. We predict m(Xi c'+) - m(Xi c'0) = -0.2 +/- 0.6 MeV, m Xi(b'0) - m Xi(b'0) = -4.0 +/- 1.9 MeV and the mass of the Sigma(b0) to be 5810.3 +/- 1.9 MeV.

引用

页数：17

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