Tetraquarks with colour-blind forces in chiral quark models

[en] We discuss the stability of multiquark systems within the recent model of Glozman et al. where the chromomagnetic hyperfine interaction is replaced by pseudoscalar-meson exchange contributions. We find that such an interaction binds heavy tetraquark systems QQ \bar q \bar q (Q = c,b and q = u,d) by 0.2-0.4 GeV. This is at variance with results of previous models where cc \bar q \bar q is unstable.

Disciplines :

Physics

Author, co-author :

Pepin, S.

Stancu, Floarea ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Genovese, M.

Richard, J. M.

Language :

English

Title :

Tetraquarks with colour-blind forces in chiral quark models

Publication date :

1997

Journal title :

Physics Letters B

ISSN :

0370-2693

eISSN :

1873-2445

Publisher :

Elsevier, Netherlands

Volume :

B393

Pages :

119-123

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://arXiv:9609348[hep-ph]

Available on ORBi :

since 03 July 2018

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