Pwave toSwave pion transitions of charmed baryons

Abstract

The SU (2N f ) ⊗ O(3) constituent quark model symmetry of the light diquark system are used to analyze single pion transitions of Swave to S-wave and P-wave to S-wave heavy baryons. We show that the Heavy Quark Symmetry (HQS) coupling factors are given in terms of the three independent couplings g Σ Q Λ Q π , f Λ Q1 Σ Q π and f Λ * Q1 Σ Q π . Light-Front quark model spin wave functions are, then, employed to calculate these couplings and to predict decay rates of single pion transitions between charm baryon states.

Strong and electromagnetic decays ofp-wave heavy baryonsΛc1,Λc1Zhu1 2000Phys. Rev. D600372View full textAdd to dashboardCite

“…The values of d-wave decay widths from the above approach and ours are much smaller than those from the quark models [14,10,12]. As for the s-wave decays various approaches yield consistent results.…”

“…However, the results have strong dependence on the constituent quark mass m q . Varying m q from 220 MeV to 340 MeV, the decay widths increase by more than a factor of two [12]. Within the same framework the electromagnetic decays of the p-wave baryons were calculated in [13].…”

“…Sum rules were derived to constrain the coupling constants. The light front quark model, together with underlying SU (2N f )× O(3) symmetry for the light diquark system, was used to relate and analyse the pionic coupling [9][10][11][12]. However, the results have strong dependence on the constituent quark mass m q .…”

Excited heavy baryon masses in HQET QCD sum rules

“…The strong decays of the excited heavy baryons were studied within the framework of heavy baryon chiral perturbation theory [15,16], various versions of quark model [18][19][20][21][22]25,24], and light cone QCD sum rules [13].…”

“…[14] that the best stability of the sum rule for the current with a derivative is obtained for a=1 and b=0, we have taken a=1 and b=0 in eqs. (19)(20)(21)(22)(23) for the sake of simplicity.…”