Hidden Structure in a Lagrangian for Hyperfine Splitting of the Heavy Baryons

Details Hidden Structure in a Lagrangian for Hyperfine Splitting of the Heavy Baryons Hidden Structure in a Lagrangian for Hyperfine Splitting of the Heavy Baryons

1996-07-24

arxiv.org/abs/hep-ph/9607412v2

Phys.Lett. B390 (1997) 329-334

Physics

High Energy Physics

High Energy Physics - Phenomenology

Many typographical errors due to an inadvertent macro command are corrected. 10 pages (LaTeX), 2 PostScript figures

Scientific paper

10.1016/S0370-2693(97)81625-5

We investigate the hyperfine splitting of the heavy baryons in the bound-state approach. We start with an ordinary relativistic Lagrangian which has been extensively used to discuss finite mass corrections to the heavy limit predictions. It turns out that the dominant contribution arises from terms which do not manifestly break the heavy spin symmetry. The actual heavy spin violating terms are uncovered by carefully performing a 1/M expansion of this Lagrangian.

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