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Relativistic corrections to decays of heavy baryons in the quark model
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abstract
We investigate relativistic corrections of order $1/m^{2}$, where $m$ is the constituent quark mass, to heavy baryon decays by emitting one pseudoscalar meson in the quark model. This work is motivated by shortcomings in the previous studies in the nonrelativistic quark model for decays of the Roper-like states such as $\Lambda_c(2765)$. We find that the relativistic corrections due to the internal motion of quarks are essential ingredients in improving their decay properties such that the decay widths are significantly increased. In addition, such corrections can explain a phenomenological suppression of the quark axial-vector coupling constant $g_A^q$ for the $\Sigma_c(2455)$ and $\Sigma_c(2520)$ decays.
Forward citations
Cited by 2 Pith papers
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Chiral effective theory of scalar and vector diquarks revisited
A new term in the chiral diquark Lagrangian is shown to control the mass ordering of pseudoscalar diquarks and to set the threshold at which heavy-baryon decays turn off under chiral restoration.
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Revisit the diquark of $\Lambda_c$ in the $\Lambda_c\to \Lambda K^+$ and $\Lambda_c\to \Sigma^0 K^+$ processes
Constituent quark model fits to Λc→ΛK+ and Λc→Σ0K+ branching ratios place the charmed baryon's diquark size parameters in a narrow, non-compact region.
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