International K-matrix day

Monday 14 Apr 2025, 14:00 → 20:00 Europe/Zurich

Remote

Mikhail Mikhasenko (Ruhr Univeristy Bochum)

International K-Matrix Day

This is an annual educational event dedicated to a powerful tool in amplitude analysis, the K matrix. Important basics will be taught on black board, practical examples will be showcased with live coding sessions. Everyone is welcome, no matter how much you already know about the topic.

Zoom: https://cern.zoom.us/j/64114654083?pwd=eZRHAaZJfDBlQEfmzBVvbqvwQh9ghV.1
Meeting ID:  641 1465 4083
Passcode: 076243

Website: rub-ep1.github.io/kmatrix-day-2025
Slack: amplitude-analysis.slack.com/archives/C08MJ655W6R
Indico: indico.global/e/kmatrix-day-2025
Recordings: youtube.com/playlist?list=PLyMw0aVKjssAoDgkgg7XhKI9LVDlzIlnu

Registration is encouraged for statistics and announcement of available lecture material and recordings.

1 Introduction

Speaker: Remco de Boer (Ruhr University Bochum)

Youtube

2 🧑‍🏫 Talk: General construction of the K-matrix

Speaker: Nils Hüsken (WWU Münster)

nh-K-Matrix-Day-2025.pdf

Youtube

3 👨‍💻 Live coding: Construction of K-matrices for different examples

Speaker: Ilya Segal (Ruhr-University Bochum)

Online notebook

Youtube

16:00 Break

4 🧑‍🏫 Talk: Complex analysis for extraction of resonance properties

Speaker: Prof. Mikhail Mikhasenko (Ruhr Univeristy Bochum)

Analytic-continuation.pdf

Youtube

5 👩‍💻 Live coding: Finding pole positions and residues

Speaker: Lena Poepping (@ComPWA @Ruhr-UniversityBochum)

Online notebook

Youtube

6 K-Wine, K-Cheese, and K-pop

k-cheese.png

k-wine.png

7 BONUS: Analytic structure of the Chew-Mandelstam function

A bubble diagram is the simplest loop diagram in the field-theory course. Yet, its analytic structure and Riemann sheets are rather cumbersome.
The additional lecture aims to explain the rich analytic structure of the function and provide better understanding on its analytic continuation.

Speaker: Prof. Mikhail Mikhasenko (Ruhr Univeristy Bochum)

CM-analytic-structure.pdf