Article (Scientific journals)
Stable uudd \bar s pentaquarks in the constituent quark model
Stancu, Floarea; Riska, D. O.
2003In Physics Letters B, 575 (3-4), p. 242-248
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Abstract :
[en] The stability of strange pentaquarks uudd (s) over bar is studied in a constituent quark model based on a flavor-spin hyperfine interaction between quarks. With this interaction model, which schematically represents the Goldstone boson exchange interaction between constituent quarks, the lowest lying strange pentaquark is a p-shell state with positive parity. The flavor-spin interaction lowers the energy of the lowest p-shell state below that of the lowest s-shell state, which has negative parity because of the negative parity of the strange antiquark. It is found that the strange pentaquark can be stable against strong decay provided that the strange antiquark interacts by a fairly strong spin-spin interaction with u and d quarks. This interaction has a form that corresponds to, eta meson exchange. Its strength may be inferred from the pi(0) decay width of D*(s) mesons. (C) 2003 Elsevier B.V. All rights reserved.
Disciplines :
Physics
Author, co-author :
Stancu, Floarea ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Riska, D. O.;  University of Helsinki > Helsinki Institute of Physics > Professor
Language :
English
Title :
Stable uudd \bar s pentaquarks in the constituent quark model
Publication date :
27 November 2003
Journal title :
Physics Letters B
ISSN :
0370-2693
eISSN :
1873-2445
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
575
Issue :
3-4
Pages :
242-248
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 April 2014

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