C. Greub

activity

19942026

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

651 citations · 6.2k across the 78 of their papers we have counts for

collaborators

79 papers

hep-ph2026

The inclusive $B ˉ \to X_{s} γ$ 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 $B$ meson in the standard model and beyond. The $O (α_{s})$ perturbative corrections are…

hep-ph2024

Three-loop contributions to $b \to s γ$ 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 $b \to s γ$ where none of the gluons touch the $b$ -leg. In the present paper, we com…

hep-ph2023★ 5 cited

Specific three-loop contributions to $b \to s γ$ 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 $α_{s}^{2}$ ) contributing to the decay amplitude for $b \to s γ$ associated with the current-current operators $O_{1}$ and $…

hep-ph2020★ 61 cited

Scalar Leptoquarks in Leptonic Processes

Andreas Crivellin, Christoph Greub, Dario Müller +1

Leptoquarks are hypothetical new particles, which couple quarks directly to leptons. They experienced a renaissance in recent years as they are prime candidates to explain the so-c…

hep-ph2019★ 22 cited

Exact NLO Matching and Analyticity in $b \to s ℓℓ$

Hrachia M. Asatrian, Christoph Greub, Javier Virto

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

hep-ph2018★ 64 cited

QCD Improved Matching for Semi-Leptonic B Decays with Leptoquarks

Jason Aebischer, Andreas Crivellin, Christoph Greub

Leptoquarks (LQs) provide very promising solutions to the tensions between the experimental measurements and the SM predictions of $b \to s ℓ^{+} ℓ^{-}$ and $b \to c τ ν$ processes. In…

The inclusive Bˉ→Xs​γ decay rate with higher precision

Three-loop contributions to b→sγ associated with the current-current operators

Specific three-loop contributions to b→sγ associated with the current-current operators