A. Buras

activity

19922026

most citedWeak Decays Beyond Leading Logarithms

2.6k citations · 19.3k across the 228 of their papers we have counts for

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hep-ph2026

Prospects for $K_{L} \to π^{0} ν ν ˉ$ , $K_{S} \to μ^{+} μ^{-}$ , $K_{L} \to π^{0} ℓ^{+} ℓ^{-}$ and $ε^{'} / ε$ after the new $K^{+} \to π^{+} ν ν ˉ$ result from NA62

Monika Blanke, Andrzej J. Buras, Cristina Lazzeroni +1

The recently announced NA62 measurement of the $K^{+} \to π^{+} ν ν ˉ$ branching ratio, based on 2016--2024 data, is fully consistent with its very accurate Standard Model (SM) predi…

hep-ph2026

Hunting New Animalcula with Flavour Changing Processes

Andrzej J. Buras

This year marks the 350th anniversary of the discovery of the first animalcula (little animals) by van Leeuvanhoek in 1676.Flavour physics makes it possible to search for new anima…

hep-ph2026

Addicted to Flavour: 1976-2026

Andrzej J. Buras

I describe my activities in Flavour Physics from 1976 to 2026. However, this 50th anniversary is not the only motivation for this writing. The second reason is the 350th anniversar…

hep-ph2025

Kaon Physics: A Cornerstone for Future Discoveries

Jason Aebischer, Atakan Tugberk Akmete, Riccardo Aliberti +153

The kaon physics programme, long heralded as a cutting-edge frontier by the European Strategy for Particle Physics, continues to stand at the intersection of discovery and innovati…

hep-ph2024

On the Interplay of Constraints from $B_{s}$ , $D$ , and $K$ Meson Mixing in $Z^{'}$ Models with Implications for $b \to s ν ν ˉ$ Transitions

Andrzej J. Buras, Peter Stangl

Within $Z^{'}$ models, neutral meson mixing severely constrains beyond the Standard Model (SM) effects in flavour changing neutral current (FCNC) processes. However, in certain…

hep-ph2024

Hunting New Animalcula with Rare K and B Decays

Andrzej J. Buras

We summarize the recent strategy for an efficient hunting of new animalcula with the help of rare K and B decays that avoids the use of the $V_{c b}$ and $V_{u b}$ parameters that ar…

hep-ph2024★ 37 cited

Disentangling new physics in $K \to π ν ˉ ν$ and $B \to K (K^{*}) ν ˉ ν$ observables

Andrzej J. Buras, Julia Harz, Martin A. Mojahed

We investigate the possibility of disentangling different new physics contributions to the rare meson decays $K \to π + \neq E$ and $B\rightarrow K(K^*)+\displays…

hep-ph2024

Expedition to the Zeptouniverse

Andrzej J. Buras

Flavour experiments promise insights into energy scales as high as 200 TeV and distances as small as Zeptometer and offer the chance to identify New Physics

hep-ph2023★ 1 cited

Kaon Theory: 50 Years Later

Andrzej J. Buras

We summarize the status of the Kaon Theory 50 years after the seminal paper of Kobayashi and Maskawa who pointed out that six quarks are necessary to have CP violation in the Stand…

hep-ph2023

Waiting for Precise Measurements of $β$ and $γ$

Andrzej J. Buras

During the last three decades the determination of the Unitarity Triangle (UT) was dominated by the measurements of its sides $R_{b}$ and $R_{t}$ through tree-level $B$ decays and the…

hep-ph2023★ 1 cited

Natural Suppression of FCNCs at the One-Loop Level in $Z^{'}$ Models with Implications for K, D and B Decays

Andrzej J. Buras

We analyse $Z^{'}$ contributions to FCNC processes at the one-loop level. In analogy to the CKM matrix we introduce two $3 \times 3$ unitary matrices $Δ^_{d} (Z^{'})$ and $\hat…

hep-ph2023

$Z^{'}$ -Tandem Mechanism for the Suppression of New Physics in Quark Mixing with Implications for K, D and B Decays

Andrzej J. Buras

$Z^{'}$ models belong to the ones that can most easily explain the anomalies in $b \to s μ^{+} μ^{-}$ transitions. However, such an explanation by a single $Z^{'}$ gauge boson, as…

hep-ph2023★ 7 cited

Kaon Physics Without New Physics in $ε_{K}$

Jason Aebischer, Andrzej J. Buras, Jacky Kumar

Despite the observation of significant suppression of $b \to s μ^{+} μ^{-}$ branching ratios no clear sign of New Physics (NP) has been identified in $Δ F = 2$ observables, in particular to…

hep-ph2023★ 12 cited

331 Model Predictions for Rare $B$ and $K$ Decays, and $Δ F = 2$ Processes: an Update

Andrzej J. Buras, Fulvia De Fazio

Motivated by the improved results from the HPQCD lattice collaboration on the hadronic matrix elements entering $Δ M_{s, d}$ in $B_{s, d}^{0} - B ˉ_{s, d}^{0}$ mixings and the increase of…

hep-ph2022★ 211 cited

50 Years of Quantum Chromodynamics

Franz Gross, Eberhard Klempt, Stanley J. Brodsky +92

This paper presents a comprehensive review of both the theory and experimental successes of Quantum Chromodynamics, starting with its emergence as a well defined theory in 1972-73…

hep-ph2022★ 49 cited

Standard Model Predictions for Rare K and B Decays without New Physics Infection

Andrzej J. Buras

The Standard Model (SM) does not contain by definition any new physics (NP) contributions to any observable but contains four CKM parameters which are not predicted by this model.…

hep-ph2022

Simple Rules for Evanescent Operators in One-Loop Basis Transformations

Jacky Kumar

The basis transformations of the effective operators often involve Fierz and other relations which are only valid in $D = 4$ space-time dimensions. In general, in $D$ space-time dime…

hep-ph2022★ 1 cited

On the Standard Model Predictions for Rare K and B Decay Branching Ratios: 2022

Andrzej J. Buras

In this decade one expects a very significant progress in measuring the branching ratios for several rare $K$ and $B$ decays, in particular for the decays $K^{+} \to π^{+} ν ν ˉ$ , $K_L\t…

hep-ph2022

On the Superiority of the $∣ V_{c b} ∣ - γ$ Plots over the Unitarity Triangle Plots in the 2020s

Andrzej J. Buras

The UT plots played already for three decades an important role in the tests of the SM and the determination of the CKM parameters. As of 2022, among the four CKM parameters, $V_{u…

hep-ph2022★ 1 cited

$ε^{'} / ε$ in the Standard Model and Beyond: 2021

Andrzej J. Buras

The present status of the ratio $ε^{'} / ε$ in the Standard Model (SM) is summarized. In particular we stress the differences between three approaches that attempt t…

hep-ph2022★ 1 cited

Standard Model Predictions for Rare $K$ and $B$ Decays without $∣ V_{c b} ∣$ and $∣ V_{u b} ∣$ Uncertainties

Andrzej J. Buras, Elena Venturini

The persistent tensions between inclusive and exclusive determinations of $∣ V_{c b} ∣$ and $∣ V_{u b} ∣$ weaken the power of theoretically clean rare $K$ and $B$ decays in the search fo…

hep-ph2022

On the Importance of Rare Kaon Decays: A Snowmass 2021 White Paper

Jason Aebischer, Andrzej J. Buras, Jacky Kumar

We stress the importance of precise measurements of rare decays $K^{+} \to π^{+} ν ν ˉ$ , $K_{L} \to π^{0} ν ν ˉ$ , $K_{L, S} \to μ^{+} μ^{-}$ and $K_{L, S} \to π^{0} ℓ^{+} ℓ^{-}$ for the sea…

hep-ph2022★ 48 cited

The Exclusive Vision of Rare $K$ and $B$ Decays and of the Quark Mixing in the Standard Model

Andrzej J. Buras, Elena Venturini

The most common predictions for rare $K$ and $B$ decay branching ratios in the Standard Model are based on the CKM elements $∣ V_{c b} ∣$ and $∣ V_{u b} ∣$ resulting from global fits, th…

hep-ph2022★ 18 cited

NLO QCD Renormalization Group Evolution for Non-Leptonic $Δ F = 2$ Transitions in the SMEFT

Jason Aebischer, Andrzej J. Buras, Jacky Kumar

We present for the first time NLO QCD Renormalization Group (RG) evolution matrices for non-leptonic $Δ F = 2$ transitions in the Standard Model Effective Field Theory (SMEFT). To thi…

Prospects for KL​→π0ννˉ, KS​→μ+μ−, KL​→π0ℓ+ℓ− and ε′/ε after the new K+→π+ννˉ result from NA62

Hunting New Animalcula with Flavour Changing Processes

Addicted to Flavour: 1976-2026

Kaon Physics: A Cornerstone for Future Discoveries

On the Interplay of Constraints from Bs​, D, and K Meson Mixing in Z′ Models with Implications for b→sννˉ Transitions

Hunting New Animalcula with Rare K and B Decays

Disentangling new physics in K→πνˉν and B→K(K∗)νˉν observables

Expedition to the Zeptouniverse

Kaon Theory: 50 Years Later

Waiting for Precise Measurements of β and γ

Natural Suppression of FCNCs at the One-Loop Level in Z′ Models with Implications for K, D and B Decays

Z′-Tandem Mechanism for the Suppression of New Physics in Quark Mixing with Implications for K, D and B Decays

Kaon Physics Without New Physics in εK​

331 Model Predictions for Rare B and K Decays, and ΔF=2 Processes: an Update

50 Years of Quantum Chromodynamics

Standard Model Predictions for Rare K and B Decays without New Physics Infection

Simple Rules for Evanescent Operators in One-Loop Basis Transformations

On the Standard Model Predictions for Rare K and B Decay Branching Ratios: 2022

On the Superiority of the ∣Vcb​∣−γ Plots over the Unitarity Triangle Plots in the 2020s

ε′/ε in the Standard Model and Beyond: 2021

Standard Model Predictions for Rare K and B Decays without ∣Vcb​∣ and ∣Vub​∣ Uncertainties

On the Importance of Rare Kaon Decays: A Snowmass 2021 White Paper

The Exclusive Vision of Rare K and B Decays and of the Quark Mixing in the Standard Model

NLO QCD Renormalization Group Evolution for Non-Leptonic ΔF=2 Transitions in the SMEFT

Prospects for $K_{L} \to π^{0} ν ν ˉ$ , $K_{S} \to μ^{+} μ^{-}$ , $K_{L} \to π^{0} ℓ^{+} ℓ^{-}$ and $ε^{'} / ε$ after the new $K^{+} \to π^{+} ν ν ˉ$ result from NA62

On the Interplay of Constraints from $B_{s}$ , $D$ , and $K$ Meson Mixing in $Z^{'}$ Models with Implications for $b \to s ν ν ˉ$ Transitions

Disentangling new physics in $K \to π ν ˉ ν$ and $B \to K (K^{*}) ν ˉ ν$ observables

Waiting for Precise Measurements of $β$ and $γ$

Natural Suppression of FCNCs at the One-Loop Level in $Z^{'}$ Models with Implications for K, D and B Decays

$Z^{'}$ -Tandem Mechanism for the Suppression of New Physics in Quark Mixing with Implications for K, D and B Decays

Kaon Physics Without New Physics in $ε_{K}$

331 Model Predictions for Rare $B$ and $K$ Decays, and $Δ F = 2$ Processes: an Update

On the Superiority of the $∣ V_{c b} ∣ - γ$ Plots over the Unitarity Triangle Plots in the 2020s

$ε^{'} / ε$ in the Standard Model and Beyond: 2021

Standard Model Predictions for Rare $K$ and $B$ Decays without $∣ V_{c b} ∣$ and $∣ V_{u b} ∣$ Uncertainties

The Exclusive Vision of Rare $K$ and $B$ Decays and of the Quark Mixing in the Standard Model

NLO QCD Renormalization Group Evolution for Non-Leptonic $Δ F = 2$ Transitions in the SMEFT