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

Masayasu Harada, Asif Qamar, Francesco Sannino, Joseph Schechter, Herbert Weigel

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Abstrakt

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.
OriginalsprogEngelsk
TidsskriftPhysics Letters B: Particle Physics, Nuclear Physics and Cosmology
Vol/bind390
Udgave nummer1-4
Sider (fra-til)329-334
ISSN0370-2693
DOI
StatusUdgivet - jan. 1997
Udgivet eksterntJa

Bibliografisk note

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

Emneord

  • hep-ph

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