Ab initio three-loop calculation of the W-exchange contribution to nonleptonic decays of double charm baryons / Th. Gutsche [et al.]
Уровень набора: Physical Review D, covering particles, fields, gravitation, and cosmologyЯзык: английский.Страна: .Резюме или реферат: 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 Ξ++cc and Ω+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-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..Примечания о наличии в документе библиографии/указателя: [References: 19 tit.].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | распады | барионы | ковариантность Ресурсы он-лайн:Щелкните здесь для доступа в онлайнTitle screen
[References: 19 tit.]
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 Ξ++cc and Ω+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-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.
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