A new two-step Gaussian expansion method enables high-precision calculation of fine structure in negative-parity singly heavy baryons via the relativized quark model, reproducing data to <5 MeV average deviation.
Charmed Baryon Strong Coupling Constants in a Light-Front Quark Model
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abstract
Light-Front quark model spin wave functions are employed to calculate the three independent couplings g_{\Sigma_c \Lambda_c \pi}, f_{\Lambda_{c1} \Sigma_c \pi} and f_{\Lambda^{*}_{c1} \Sigma_c \pi} of S-wave to S-wave and P-wave to S-wave one-pion transitions. It is found that g_{\Sigma_c \Lambda_c \pi}=6.81 MeV^{-1}, f_{\Lambda_{c1} \Sigma_c \pi}=1.16 and f_{\Lambda^{*}_{c1} \Sigma_c \pi}=0.96 . 10^{-4} MeV^{-2}. We also predict decay rates for specific strong transitions of charmed baryons.
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Spin-dependent interactions and fine structure in the negative-parity singly heavy baryons
A new two-step Gaussian expansion method enables high-precision calculation of fine structure in negative-parity singly heavy baryons via the relativized quark model, reproducing data to <5 MeV average deviation.