Journal
PHYSICAL REVIEW D
Volume 99, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.056013
Keywords
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Funding
- Carl Zeiss Foundation under Project Kepler Center fur Astro-und Teilchenphysik: Hochsensitive Nachweistechnik zur Erforschung des unsichtbaren Universums [Gz: 0653-2.8/581/2]
- CONICYT (Chile) PIA/Basal [FB0821]
- Russian Federation program Nauka [0.1764.GZB.2017]
- Tomsk State University competitiveness improvement program [8.1.07.2018]
- Tomsk Polytechnic University Competitiveness Enhancement Program [VIU-FTI-72/2017]
- PRISMA Cluster of Excellence (Mainz Uni.)
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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 Xi(++)(cc) and Omega(+)(cc). 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-cxchange contribution. We calculate hclicity 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.
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