Ab initio three-loop calculation of the W-exchange contribution to nonleptonic decays of double charm baryons; Physical Review D; Vol. 99, iss. 5

Ab initio three-loop calculation of the W-exchange contribution to nonleptonic decays of double charm baryons

Dades bibliogràfiques
Parent link:Physical Review D: covering particles, fields, gravitation, and cosmology
Vol. 99, iss. 5.— 2019.— [056013, 7 p.]
Autor corporatiu: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Altres autors: Gutsche Th. Thomas, Ivanov M. A. Mikhail Alekseevich, Korner J. C. Jurgen, Lyubovitskiy (Lyubovitskij) V. E. Valery Efimovich, Tyulemisov Zh. Zhomart
Sumari:Title screen
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.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:anglès
Publicat: 2019
Matèries:
электронный ресурс
труды учёных ТПУ
распады
барионы
ковариантность
Accés en línia:https://doi.org/10.1103/PhysRevD.99.056013
Format: Electrònic Capítol de llibre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660736
Descripció
Sumari:Title screen
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.
Режим доступа: по договору с организацией-держателем ресурса
DOI:10.1103/PhysRevD.99.056013

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