Article (Scientific journals)
Excited [70,l(+)] baryons in large N-c QCD
Matagne, Nicolas; Stancu, Floarea
2005In Physics Letters B, 631 (1-2), p. 7-15
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Abstract :
[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.
Disciplines :
Physics
Author, co-author :
Matagne, Nicolas
Stancu, Floarea ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
Excited [70,l(+)] baryons in large N-c QCD
Publication date :
15 December 2005
Journal title :
Physics Letters B
ISSN :
0370-2693
eISSN :
1873-2445
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
631
Issue :
1-2
Pages :
7-15
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 January 2011

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