Ab initio three-loop calculation of the W -exchange contribution to nonleptonic decays of double charm baryons AB INITIO THREE-LOOP CALCULATION of the W - ... THOMAS GUTSCHE et al.

Thomas Gutsche, Mikhail A. Ivanov, Jürgen G. Körner, Valery E. Lyubovitskij, Zhomart Tyulemissov

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We have made an ab initio three-loop quark model calculation of the W-exchange contribution to the nonleptonic two-body decays of the doubly charmed baryons Ξcc++ and Ωcc+. The W-exchange contributions appear in addition to the factorizable tree graph contributions and are not suppressed in general. We make use of the covariant confined quark model previously developed by us to calculate the tree graph as well as the W-exchange contribution. We calculate helicity amplitudes and quantitatively compare the tree graph and W-exchange contributions. Finally, we compare the calculated decay widths with those from other theoretical approaches when they are available.

Original languageEnglish
Article number056013
JournalPhysical Review D
Issue number5
Publication statusPublished - 1 Mar 2019


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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