Calculation of Two-Boson Exchange with Complex-Valued Masses

A new method for calculating the contribution of two-boson exchange diagrams (boxes) to the cross section for a four fermion process that involve one and two complex-valued boson masses is described. A detailed numerical analysis of the results obtained by means of this method and their comparison w...

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Veröffentlicht in:	Physics of atomic nuclei 2021-11, Vol.84 (6), p.1225-1243
1. Verfasser:	Zykunov, V. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Asymptotic methods Elementary Particles and Fields/Theory Fermions Mathematical analysis Nuclear cross sections Numerical analysis Particle and Nuclear Physics Physics Physics and Astronomy
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	A new method for calculating the contribution of two-boson exchange diagrams (boxes) to the cross section for a four fermion process that involve one and two complex-valued boson masses is described. A detailed numerical analysis of the results obtained by means of this method and their comparison with the asymptotic expressions for the above cross section in the regions of energies below and above the -resonance energy are performed.
ISSN:	1063-7788 1562-692X
DOI:	10.1134/S106377882105015X