arXiv:hep-ph/0506065·v2·High Energy Physics — Phenomenology
Effective Field Theory Lagrangians for Baryons with Two and Three Heavy Quarks
Nora Brambilla🇮🇹 · Thomas Roesch🇮🇹 · Antonio Vairo🇩🇪
Abstract
By analogy with pNRQCD, we construct Effective Field Theories suitable to describe the heavy-quark sector of baryons made of two and three heavy quarks. A long-standing discrepancy between the hyperfine splitting of doubly heavy baryons obtained in the HQET and potential models is solved. The one-loop matching of the 4-quark operators of dimension 6 is provided.
Comments: 37 pages, 4 figures, revtex4, feynmf.sty; typos corrected, reference added. Accepted for publication in Physical Review D