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Spectrum of singly heavy baryons from a chiral effective theory of diquarks

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arxiv 2003.03525 v2 pith:CRLJUL5X submitted 2020-03-07 hep-ph hep-ex

classification hep-phhep-ex
keywords baryonsdiquarksheavysinglychiraleffectiveinversemass
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abstract

The mass spectra of singly charmed and bottom baryons, $\Lambda_{c/b}(1/2^\pm,3/2^-)$ and $\Xi_{c/b}(1/2^\pm,3/2^-)$, are investigated using a nonrelativistic potential model with a heavy quark and a light diquark. The masses of the scalar and pseudoscalar diquarks are taken from a chiral effective theory. The effect of $U_A(1)$ anomaly induces an inverse hierarchy between the masses of strange and non-strange pseudoscalar diquarks, which leads to a similar inverse mass ordering in $\rho$-mode excitations of singly heavy baryons.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fate of $\Sigma_c$, $\Xi_c'$ and $\Omega_c$ baryons at high temperature with chiral restoration

    hep-ph 2024-11 conditional novelty 6.0 of 10

    At high temperature, parity partners of singly charmed baryons become degenerate, Sigma_c and Omega_c masses converge, and the Sigma_c to Lambda_c pi width closes.

  2. Chiral effective theory of scalar and vector diquarks revisited

    hep-ph 2024-11 conditional novelty 5.0 of 10

    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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