K. Kampf

most citedPositive Geometry for Stringy Scalar Amplitudes

2 citations · 2 across the 4 of their papers we have counts for

collaborators

4 papers

hep-th2026

A Surface Integrand for the Inverse KLT Kernel

Christoph Bartsch, Karol Kampf, Jiří Novotný +1

We propose a loop-level generalization of the inverse string theory Kawai-Lewellen-Tye (KLT) kernel: the planar inverse KLT integrand. The integrand is defined constructively via a…

hep-th2025★ 2 cited

Positive Geometry for Stringy Scalar Amplitudes

Christoph Bartsch, Karol Kampf, David Podivin +1

We introduce a new positive geometry, the associahedral grid, which provides a geometric realization of the inverse string theory KLT kernel. It captures the full $α^{'}$ -dependence o…

hep-ex2025

Searches for hidden sectors using $K^{+} \to π^{+} X$ decays

NA62 Collaboration

Results from the study of the rare decays $K^{+} \to π^{+} ν ν ˉ$ , $K^{+} \to π^{+} μ^{+} μ^{-}$ and $K^{+} \to π^{+} γ γ$ at the NA62 experiment at CERN are interpreted in terms…

hep-th2025

Soft Factor Structure of MHV Amplitudes for Massless Charged Particles

Christoph Bartsch, Karol Kampf, David Podivín

We present a simple derivation of MHV amplitudes in massless spinor and scalar electrodynamics. Working with permutationally invariant amplitudes, we show that they are fully deter…

A Surface Integrand for the Inverse KLT Kernel

Positive Geometry for Stringy Scalar Amplitudes

Searches for hidden sectors using K+→π+X decays

Soft Factor Structure of MHV Amplitudes for Massless Charged Particles

Searches for hidden sectors using $K^{+} \to π^{+} X$ decays