Reference : Excited [70,l(+)] baryons in large N-c QCD
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/83120
Excited [70,l(+)] baryons in large N-c QCD
English
Matagne, Nicolas [ > > ]
Stancu, Floarea mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
15-Dec-2005
Physics Letters B
Elsevier Science Bv
631
1-2
7-15
Yes (verified by ORBi)
International
0370-2693
Amsterdam
[en] The masses of the positive parity [70, 0(+)] and [70, 2(+)] non-strange baryons are calculated in large N-c QCD by considering the most dominant operators in an 1/N-c expansion. The approach is based on the introduction of an excited core, obtained after the last particle (an excited quark) has been removed. Configuration mixing is neglected, for simplicity. Although being a sub-leading 1/Nc order, we find that the spin-spin interaction plays a dominant role in describing the data. The role of No operators is also pointed out. We show how the contribution of the linear term in Nc, of the spin-spin and of the spin-orbit terms vary with the excitation energy. (c) 2005 Elsevier B.V. All rights reserved.
http://hdl.handle.net/2268/83120
10.1016/j.physletb.2005.09.076

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