TY - JOUR
T1 - New Relations for Excited Baryons in Large-[Formula presented] QCD
AU - Cohen, Thomas D.
AU - Lebed, Richard
PY - 2003/7/2
Y1 - 2003/7/2
N2 - We show that excited baryons in large-[Formula presented] QCD form multiplets, within which masses are first split at [Formula presented]. The dominant couplings of resonances to various mesons are highly constrained: The [Formula presented] decays at leading [Formula presented] order exclusively to [Formula presented] rather than [Formula presented], and vice versa for the [Formula presented]. This multiplet structure is reproduced by a simple large-[Formula presented] quark model, well studied in the literature, that describes resonances as single-quark excitations.
AB - We show that excited baryons in large-[Formula presented] QCD form multiplets, within which masses are first split at [Formula presented]. The dominant couplings of resonances to various mesons are highly constrained: The [Formula presented] decays at leading [Formula presented] order exclusively to [Formula presented] rather than [Formula presented], and vice versa for the [Formula presented]. This multiplet structure is reproduced by a simple large-[Formula presented] quark model, well studied in the literature, that describes resonances as single-quark excitations.
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U2 - 10.1103/PhysRevLett.91.012001
DO - 10.1103/PhysRevLett.91.012001
M3 - Article
AN - SCOPUS:85038312905
SN - 0031-9007
VL - 91
JO - Physical Review Letters
JF - Physical Review Letters
IS - 1
ER -