TY - JOUR
T1 - The spectrum of states with one current acting on the adjoint vacuum of massless QCD2
AU - Abrashkin, A.
AU - Frishman, Yitzhak
AU - Sonnenschein, J.
N1 - Funding Information:
The work of A.A. and J.S. was supported in part by the Israel Science Foundation and by the German–Israeli Foundation. J.S. would like to thank the Einstein Center of Theoretical Physics at the Weizmann Institute for support.
PY - 2004/12/20
Y1 - 2004/12/20
N2 - We consider a "one current" state, which is obtained by the application of a color current on the "adjoint" vacuum. This is done in QCD2, with the underlying quarks in the fundamental representation. The quarks are taken to be massless, in which case the theory on the light-front can be "currentized", namely, formulated in terms of currents only. The adjoint vacuum is shown to be the application of a current derivative, at zero momentum, on the singlet vacuum. We apply the operator M2=2P+ P- on these states and find that in general they are not eigenstates of M2 apart from the large Nf limit. Problems with infra-red regularizations are pointed out. We discuss the fermionic structure of these states.
AB - We consider a "one current" state, which is obtained by the application of a color current on the "adjoint" vacuum. This is done in QCD2, with the underlying quarks in the fundamental representation. The quarks are taken to be massless, in which case the theory on the light-front can be "currentized", namely, formulated in terms of currents only. The adjoint vacuum is shown to be the application of a current derivative, at zero momentum, on the singlet vacuum. We apply the operator M2=2P+ P- on these states and find that in general they are not eigenstates of M2 apart from the large Nf limit. Problems with infra-red regularizations are pointed out. We discuss the fermionic structure of these states.
UR - http://www.scopus.com/inward/record.url?scp=8844274842&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysb.2004.10.019
DO - 10.1016/j.nuclphysb.2004.10.019
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AN - SCOPUS:8844274842
SN - 0550-3213
VL - 703
SP - 320
EP - 332
JO - Nuclear Physics B
JF - Nuclear Physics B
IS - 1-2
ER -