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# XVIII International Conference on Hadron Spectroscopy and Structure (HADRON2019)

Aug 16 – 21, 2019
Guilin Bravo Hotel, Guilin, China
Asia/Shanghai timezone

## Radiative corrections for the decay $\Sigma^0\to\Lambda e^+ e^-$

Aug 17, 2019, 5:50 PM
20m
Duxiu Room (Guilin Bravo Hotel, Guilin, China)

### Duxiu Room

#### Guilin Bravo Hotel, Guilin, China

14 South Ronghu Road, Xiangshan, Guilin 541002, Guangxi, China
Parallel Session 4: Hadron decays, production and interactions

### Speaker

Dr Tomáš Husek (IFIC (UV-CSIC))

### Description

Electromagnetic form factors serve to explore the intrinsic structure of nucleons and their strangeness partners. With electron scattering at low energies the electromagnetic moments and radii of nucleons can be deduced. The corresponding experiments for hyperons are limited because of their unstable nature. Only for one process this turns to an advantage: the decay of the neutral Sigma hyperon to the Lambda hyperon and the real or virtual photon. Due to the limited phase space, the effects caused by the $\Sigma^0\to\Lambda$ transition form factors compete with the QED radiative corrections for the decay $\Sigma^0 \to \Lambda e^+ e^-$. In this talk, the complete set of these NLO QED corrections to the Dalitz plot, calculated beyond the soft-photon approximation, are presented.

### Primary author

Dr Tomáš Husek (IFIC (UV-CSIC))

### Co-author

Prof. Stefan Leupold (Uppsala University)

 Slides