# Strangeness in Nuclei and in Neutron Stars

May 20 – 21, 2015
Dipartimento di Fisica, Universita di Pisa
Europe/Rome timezone

## X-rays of light kaonic atoms: SIDDHARTA and future

May 20, 2015, 12:30 PM
30m
N. 131, building C (Dipartimento di Fisica, Universita di Pisa)

### N. 131, building C

#### Dipartimento di Fisica, Universita` di Pisa

Largo Bruno Pontecorvo, 3, Pisa (Italy)

### Speaker

Michael Cargnelli (Austrian Academy of Sciences - Stefan Meyer Institute)

### Description

The X-ray measurements of kaonic atoms are important for understanding the low-energy QCD in the strangeness sector. The SIDDHARTA experiment studied the X-ray transitions of 4 light kaonic atoms (H, D, 3He and 4He) using the DAFNE electron-positron collider at LNF (Italy). The currently most precise values of the shift and width of the kaonic hydrogen 1s state were determined, which are now being used as fundamental information for the low-energy K-p interaction in theoretical studies. The yields of kaonic hydrogen K-series transitions and of the kaonic He3 and He4 L-series were measured, the upper limit of the X-ray yields of kaonic deuterium was determined, important for future K-d experiments. The shifts and widths of the kaonic 3He and 4He 2p states were analyzed, settling open points in this issue. In the contribution, the experimental approach and the results of SIDDHARTA will be presented, along with plans for new experiments on kaonic deuterium.

### Primary author

Michael Cargnelli (Austrian Academy of Sciences - Stefan Meyer Institute)

### Co-author

SIDDHARTA Collaboration (.)

 Slides