Zobrazeno 1 - 9
of 9
pro vyhledávání: '"H. M. Asatrian"'
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 10, Pp 1-30 (2017)
Abstract We calculate a class of three-loop Feynman diagrams which contribute to the next-to-next-to-leading logarithmic approximation for the width difference ΔΓ s in the B s − B ¯ s $$ {B}_s-{\overline{B}}_s $$ system. The considered diagrams
Externí odkaz:
https://doaj.org/article/31036e86c35d49f1893978d454fd1c76
Autor:
H. H. Asatryan, H. M. Asatrian
Publikováno v:
Journal of Contemporary Physics (Armenian Academy of Sciences). 56:177-183
Our article is devoted to the computation of two three-loop diagrams that contribute to the decay $$b \to s\gamma $$ at $$\alpha _{s}^{2}$$ order. We use differential equations for master integrals (MI) to compute these diagrams for an arbitrary c-qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02a31912dc9eb6d9bd0d689878b3b99e
https://doi.org/10.3103/s1068337221030063
https://doi.org/10.3103/s1068337221030063
Publikováno v:
International Journal of Modern Physics A. 16:3805-3822
The direct CP-asymmetry in the inclusive $B \to X_d \gamma$ and $B \to X_d e^+ e^ - $ decays is investigated in the two-Higgs doublet extension of the Standard Model (2HDM). The investigation is performed in the lowest non-vanishing order of the pert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f852b167c68d717d323a7f2c2de3b77
https://doi.org/10.1142/s0217751x01005079
https://doi.org/10.1142/s0217751x01005079
Publikováno v:
Physics Letters B. 399:303-311
The direct CP-violations in $SU(2)_{L}\times SU(2)_{R} \times U(1)$ model and two-Higgs doublet extension of the standard model for $b \to d\gamma$ and $b \to s\gamma$ decays are investigated. The calculated value of CP-asymmetry for these two models
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e95034a77371975692fe4f8a8ee6ae11
https://doi.org/10.1016/s0370-2693(97)00297-9
https://doi.org/10.1016/s0370-2693(97)00297-9
Autor:
G.K. Eguian, H. M. Asatrian
Publikováno v:
Modern Physics Letters A. 10:2943-2954
The Higgs boson mass problem is considered in the next-to-minimal supersymmetric standard model. The Higgs potential and the renormalization group equations for the gauge, Yukawa and scalar coupling constants are analyzed. The restrictions on the Hig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::065efa86f8073094254e4869a0d25169
https://doi.org/10.1142/s0217732395003082
https://doi.org/10.1142/s0217732395003082
Autor:
H. M. Asatrian, A. N. Ioannissian
Publikováno v:
Modern Physics Letters A. :1089-1096
Rare B-meson decays are investigated in the left–right symmetric models. The scalar particle contribution to the amplitude of the b → sγ decay is calculated. It is shown that this contribution can be essential even for scalar particle masses of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af7f5db3e0f2cfd3bad31c7eea7617c1
https://doi.org/10.1142/s0217732390001219
https://doi.org/10.1142/s0217732390001219
Autor:
M, Misiak, H M, Asatrian, K, Bieri, M, Czakon, A, Czarnecki, T, Ewerth, A, Ferroglia, P, Gambino, M, Gorbahn, C, Greub, U, Haisch, A, Hovhannisyan, T, Hurth, A, Mitov, V, Poghosyan, M, Slusarczyk, M, Steinhauser
Publikováno v:
Physical review letters. 98(2)
Combining our results for various O(alpha[s]) corrections to the weak radiative B-meson decay, we are able to present the first estimate of the branching ratio at the next-to-next-to-leading order in QCD. We find B(B[over ]--X[s]gamma)=(3.15+/-0.23)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c50c8798c896c00b5a35585c74cde192
https://pubmed.ncbi.nlm.nih.gov/17358597
https://pubmed.ncbi.nlm.nih.gov/17358597
Autor:
H. M. Asatrian, G. K. Yeghiyan
The Higgs boson mass problem is considered in the next-to-minimal supersymmetric standard model for the case of the spontaneous CP violation. The renormalization group equations for the gauge, Yukawa and scalar coupling constants, the effective Higgs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c1059fa0e003b23f2c91a04093efb9a
