Search Results - "Asatrian, H. M."

Updated Next-to-Next-to-Leading-Order QCD Predictions for the Weak Radiative B-Meson Decays by Misiak, M, Asatrian, H M, Boughezal, R, Czakon, M, Ewerth, T, Ferroglia, A, Fiedler, P, Gambino, P, Greub, C, Haisch, U, Huber, T, Kamiński, M, Ossola, G, Poradziński, M, Rehman, A, Schutzmeier, T, Steinhauser, M, Virto, J

“…Weak radiative decays of the B mesons belong to the most important flavor changing processes that provide constraints on physics at the TeV scale. In the…”
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Contribution of the Interference of the O7–O8 for the B → Xsγγ Decay by Asatryan, H. H., Asatrian, H. M., Tumasyan, S. A.

“…Rare decays of B -mesons allow one the investigation of physics outside of the SM. For processes, the potential new physics should be visible not only for the…”
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Calculations of Higher Order Quantum Chromodynamics Corrections by Asatryan, H. H., Asatrian, H. M.

“…Our article is devoted to the computation of two three-loop diagrams that contribute to the decay at order. We use differential equations for master integrals…”
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Towards next-to-next-to-leading-log accuracy for the width difference in the Bs−B¯s system: fermionic contributions to order (mc/mb)0 and (mc/mb)1 by Asatrian, H. M., Hovhannisyan, A., Nierste, U., Yeghiazaryan, A.

“…A bstract We calculate a class of three-loop Feynman diagrams which contribute to the next-to-next-to-leading logarithmic approximation for the width…”
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Rare decays B → Xs(d)γ at the NLO by ASATRIAN, H. M, ASATRYAN, H. H, HOVHANNISYAN, A

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Phase space analysis for three and four massive particles in final states by Asatrian, H. M., Hovhannisyan, A., Yeghiazaryan, A.

“…We propose formulas for computing the phase space integrals of 1 arrow right 3 and 1 arrow right 4 processes with massive particles in final states. As an…”
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Towards next-to-next-to-leading-log accuracy for the width difference in the $$ {B}_s-{\overline{B}}_s $$ system: fermionic contributions to order (m c /m b )0 and (m c /m b )1 by Asatrian, H. M., Hovhannisyan, A., Nierste, U., Yeghiazaryan, A.

“…A bstract We calculate a class of three-loop Feynman diagrams which contribute to the next-to-next-to-leading logarithmic approximation for the width…”
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Estimate of B ( B ¯ → X s γ ) at O ( α s 2 ) by Misiak, M., Asatrian, H. M., Bieri, K., Czakon, M., Czarnecki, A., Ewerth, T., Ferroglia, A., Gambino, P., Gorbahn, M., Greub, C., Haisch, U., Hovhannisyan, A., Hurth, T., Mitov, A., Poghosyan, V., Ślusarczyk, M., Steinhauser, M.

“…Combining our results for various O({alpha}{sub s}{sup 2}) corrections to the weak radiative B-meson decay, we are able to present the first estimate of the…”
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NLL QCD contribution of the electromagnetic dipole operator to B -> X_s gamma gamma with a massive strange quark by Asatrian, H. M, Greub, C

“…Phys. Rev. D 89, 094028 (2014) We calculate the O(alpha_s) corrections to the double differential decay width dGamma_{77}/(ds_1 ds_2) for the process B -> X_s…”
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Tree-level contribution to \bar{B} -> X_d gamma using fragmentation functions by Asatrian, H. M, Greub, C

“…Phys. Rev. D 88, 074014 (2013) We evaluate the most important tree-level contributions connected with the b-> u \bar{u} d gamma transition to the inclusive…”
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Phase space analysis for three and four massive particles in final states by Asatrian, H. M, Hovhannisyan, A, Yeghiazaryan, A

“…Phys. Rev. D 86, 114023 (2012) We propose formulae for computing the phase space integrals of $1\to 3$ and $1\to 4$ processes with massive particles in final…”
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NLL corrections for B-meson radiative exclusive decays by Asatryan, H.H., Asatrian, H.M., Wyler, D.

“…We calculate the next-to-leading corrections to the branching ratio of exclusive B→K ∗γ decay. The renormalization scale dependence is reduced compared to the…”
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Updated NNLO QCD predictions for the weak radiative B-meson decays by Misiak, M, Asatrian, H. M, Boughezal, R, Czakon, M, Ewerth, T, Ferroglia, A, Fiedler, P, Gambino, P, Greub, C, Haisch, U, Huber, T, Kaminski, M, Ossola, G, Poradzinski, M, Rehman, A, Schutzmeier, T, Steinhauser, M, Virto, J

“…Phys. Rev. Lett. 114, 221801 (2015) Weak radiative decays of the B mesons belong to the most important flavor changing processes that provide constraints on…”
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Towards next-to-next-to-leading-log accuracy for the width difference in the B s − B ¯ s $$ {B}_s-{\overline{B}}_s $$ system: fermionic contributions to order (m c /m b )0 and (m c /m b )1 by H. M. Asatrian, A. Hovhannisyan, U. Nierste, A. Yeghiazaryan

“…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…”
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NLL QCD contribution of the Electromagnetic Dipole operator to B-> X_s gamma gamma by Asatrian, H. M, Greub, C, Kokulu, A, Yeghiazaryan, A

“…Phys. Rev. D 85, 014020 (2012) We calculate the set of O(alpha_s) corrections to the double differential decay width dGamma_77/(ds_1*ds_2) for the process B ->…”
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CP-violation in b quark radiative inclusive decays by Asatrian, H.M., Yeghiyan, G.K., Ioannissian, A.N.

“…The direct CP-violations in SU(2) L × SU(2) R × U(1) model and two-Higgs doublet extension of the standard model for b → dγ and b → sγ decays are investigated…”
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Complete (O_7,O_8) contribution to B -> X_s gamma at order alpha_s^2 by Asatrian, H. M, Ewerth, T, Ferroglia, A, Greub, C, Ossola, G

“…Phys.Rev.D82:074006,2010 We calculate the set of O(alpha_s^2) corrections to the branching ratio and to the photon energy spectrum of the decay process B ->…”
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NNLO corrections to B --> X_u l nu in the shape-function region by Asatrian, H. M, Greub, C, Pecjak, B. D

“…Phys.Rev.D78:114028,2008 The inclusive decay B --> X_u l nu is of much interest because of its potential to constrain the CKM element |V_ub|. Experimental cuts…”
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Calculations of two-loop virtual corrections to b → sl + l − in the standard model by Asatryan, H. H., Asatrian, H. M., Greub, C., Walker, M.

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Complete gluon bremsstrahlung corrections to the process b → sl + l by Asatryan, H. H., Asatrian, H. M., Greub, C., Walker, M.

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