Lightest flavor-singlet qqq baryons as witnesses to color



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Estevez, Jonathan and Llanes Estrada, Felipe José and Martínez Fernández, Victor and Pastor Gutierrez, Álvaro (2020) Lightest flavor-singlet qqq baryons as witnesses to color. Physical review D, 102 (11). ISSN 2470-0010

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We present a new computation in a field-theoretical model of Coulomb-gauge QCD of the first radial and angular excitations of a qqq system in an SU(3) flavor-singlet state, Lambda(S). The traditional motivation for the study is that the absence of flavor singlets in the lowest-lying spectrum is a direct consequence of the color degree of freedom. [The calculation is tested with decuplet baryons Delta(1232) and Omega(1672).] We also analyze decay branching fractions of the flavor-singlet baryon for various masses with the simplest effective Lagrangians.

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© 2020 Amer Physical Soc.
This project received funding from the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 824093 (STRONG-2020), Grants No. MINECO:FPA2016-75654-C2-1-P, No. MICINN: PID2019-108655 GB-I00, No. PID2019-106080 GB-C21 (Spain), and Universidad Complutense de Madrid under research group 910309 and IPARCOS Institute.

Uncontrolled Keywords:Chiral dynamics; Bound-states; Quark-model; Spectroscopy; Particles; Meson; QCD.
Subjects:Sciences > Physics
ID Code:63657
Deposited On:19 Jan 2021 18:33
Last Modified:14 Jan 2022 12:25

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