Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Crucean, Cosmin"'
Autor:
Crucean, Cosmin, Fodor, Amalia Dariana
In this paper we study the charged electro-weak interactions in the de Sitter geometry. We develop the reduction formalism for the Proca field with the help of the solutions for the interacting fields. Perturbation theory is used for obtaining the de
Externí odkaz:
http://arxiv.org/abs/2212.12173
In this paper we study the problem of neutral electro-weak interactions in a de Sitter geometry. We develop the formalism of reduction for the Proca field with the help of the solutions for the interacting fields and by using perturbative methods we
Externí odkaz:
http://arxiv.org/abs/2212.04152
Autor:
Crucean, Cosmin1 (AUTHOR) cosmin.crucean@e-uvt.ro, Dumitrele, Diana1 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Aug2024, Vol. 84 Issue 8, p1-28. 28p.
Production of Z bosons in emission processes by neutrinos in the expanding de Sitter universe is studied by using perturbative methods. The total probability and transition rate for the spontaneous emission of a Z boson by a neutrino is computed anal
Externí odkaz:
http://arxiv.org/abs/2008.09816
In this paper we present a method for computing the total probability corresponding to the processes of fermion pair production in dipole magnetic field and external Coulomb field in a de Sitter geometry. For that we rewrite the functions that define
Externí odkaz:
http://arxiv.org/abs/1905.06561
Autor:
Crucean, Cosmin
Production of Z bosons and neutrinos is studied in the expanding de Sitter universe. The expression of the transition amplitudes in the case of Z boson interaction with leptons is established by using perturbative methods. Then the amplitude and prob
Externí odkaz:
http://arxiv.org/abs/1811.03310
Production of massive W± bosons and fermion–antifermion pairs from vacuum in the de Sitter Universe.
Autor:
Crucean, Cosmin1 (AUTHOR) cosmin.crucean@e-uvt.ro, Fodor, Amalia Dariana1 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Oct2023, Vol. 83 Issue 10, p1-29. 29p.
Publikováno v:
Mod. Phys. Lett. A 31, 1650082 (2016)
In this letter we study the problem of scalar particle production in external electric field in de Sitter geometry. The total probability is calculated using the previously obtained result in Ref.\cite{6} for transition amplitude in external electric
Externí odkaz:
http://arxiv.org/abs/1702.06699
In this paper we study the problem of gauge invariance of the first order transition amplitudes in de Sitter QED in Coulomb gauge. We consider the gauge transformations which preserve the Coulomb gauge, that contain the gradient of the gauge function
Externí odkaz:
http://arxiv.org/abs/1702.05895
Publikováno v:
Phys. Rev. D 93, 044070 (2016)
The process of fermion production in the field of a magnetic dipole on a de Sitter expanding universe is analyzed. The amplitude and probability for production of massive fermions are obtained using the exact solution of the Dirac equation written in
Externí odkaz:
http://arxiv.org/abs/1602.08220