activity
19952026
most citedEstimate of BR(B -> X_s gamma) at O(alpha_s^2)

651 citations · 2k across the 32 of their papers we have counts for

collaborators

33 papers

hep-ph2026

The inclusive decay rate with higher precision

M. Misiak, H. M. Asatrian, K. Brune +11

We present a new and upgraded analysis of the inclusive weak radiative decay of the meson in the standard model and beyond. The perturbative corrections are…

hep-ph2024

Three-loop contributions to associated with the current-current operators

Christoph Greub, Hrachia M. Asatrian, Hrachya H. Asatryan +2

In a recent work, we calculated all three-loop diagrams contributing to the decay amplitude for where none of the gluons touch the -leg. In the present paper, we com…

hep-ph2023★ 5 cited

Specific three-loop contributions to associated with the current-current operators

Christoph Greub, Hrachia M. Asatrian, Francesco Saturnino +1

We work out a specific class of three-loop diagrams (of order ) contributing to the decay amplitude for associated with the current-current operators and $…

hep-ph2020★ 25 cited

Penguin contribution to width difference and CP asymmetry in - mixing at order

Hrachia M. Asatrian, Hrachya H. Asatryan, Artyom Hovhannisyan +3

We present new contributions to the decay matrix element of the - mixing complex, where or . Our new results constitute the order cor…

hep-ph2019★ 22 cited

Exact NLO Matching and Analyticity in

Hrachia M. Asatrian, Christoph Greub, Javier Virto

Exclusive rare decays mediated by transitions receive contributions from four-quark operators that cannot be naively expressed in terms of local form factors. Inst…

hep-ph2017★ 35 cited

Towards next-to-next-to-leading-log accuracy for the width difference in the system: fermionic contributions to order and

H. M. Asatrian, Artyom Hovhannisyan, Ulrich Nierste +1

We calculate a class of three-loop Feynman diagrams which contribute to the next-to-next-to-leading logarithmic approximation for the width difference in the $B_s-\bar{B}_…