TY - JOUR
T1 - Tetraquarks with exotic flavor quantum numbers at large Nc in QCD(AS)
AU - Cohen, Thomas D.
AU - Lebed, Richard
PY - 2014/3/17
Y1 - 2014/3/17
N2 - It is shown that the large Nc limit of QCD with quarks in the two-index antisymmetric color representation [QCD(AS)] has narrow tetraquark states with exotic flavor quantum numbers. They decay into mesons with a width that is parametrically O(1/Nc2). Tetraquarks with nonexotic quantum numbers mix at leading order with mesons of the same overall quantum numbers. QCD(AS) at Nc=3 corresponds to ordinary QCD; its large Nc limit represents an alternative starting point for a 1/Nc expansion to the standard one with quarks in the fundamental color representation.
AB - It is shown that the large Nc limit of QCD with quarks in the two-index antisymmetric color representation [QCD(AS)] has narrow tetraquark states with exotic flavor quantum numbers. They decay into mesons with a width that is parametrically O(1/Nc2). Tetraquarks with nonexotic quantum numbers mix at leading order with mesons of the same overall quantum numbers. QCD(AS) at Nc=3 corresponds to ordinary QCD; its large Nc limit represents an alternative starting point for a 1/Nc expansion to the standard one with quarks in the fundamental color representation.
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U2 - 10.1103/PhysRevD.89.054018
DO - 10.1103/PhysRevD.89.054018
M3 - Article
AN - SCOPUS:84896962289
SN - 1550-7998
VL - 89
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
M1 - 054018
ER -