Preliminary study of kaonic deuterium X-rays by the SIDDHARTA experiment at DAFNE

Abstract

The study of the KbarN system at very low energies plays a key role for the understanding of the strong interaction between hadrons in the strangeness sector. At the DAFNE electron-positron collider of Laboratori Nazionali di Frascati we studied kaonic atoms with Z=1 and Z=2, taking advantage of the low-energy charged kaons from Phi-mesons decaying nearly at rest. The SIDDHARTA experiment used X-ray spectroscopy of the kaonic atoms to determine the transition yields and the strong interaction induced shift and width of the lowest experimentally accessible level (1s for H and D and 2p for He). Shift and width are connected to the real and imaginary part of the scattering length. To disentangle the isospin dependent scattering lengths of the antikaon-nucleon interaction, measurements of Kp and of Kd are needed. We report here on an exploratory deuterium measurement, from which a limit for the yield of the K-series transitions was derived: Y(K_tot)<0.0143 and Y(K_alpha)<0.0039 (CL 90%). Also, the upcoming SIDDHARTA-2 kaonic deuterium experiment is introduced.

Accepted by Nuclear Physics A

References in corpus (4)

• Kaon-nucleon scattering lengths from kaonic deuterium experiments
• S-Wave Scattering of Fermion Revisited
• Measurements of the strong-interaction widths of the kaonic 3He and 4He 2p levels
• Faddeev-Chiral Unitary Approach to the $K^{-}d$ scattering length

Cited by in corpus (9)

• Hadron Physics at J-PARC
• K${}^{-}$ multi-nucleon absorption cross sections and branching ratios in $\Lambda$p and ${\Sigma }^0$p final states
• $K$-series X-ray yield measurement of kaonic hydrogen atoms in a gaseous target
• X-ray transition yields of low-Z kaonic atoms produced in Kapton
• Precision X-ray spectroscopy of kaonic atoms as a probe of low-energy kaon-nucleus interaction
• $\bar{K}$ induced formation of the $f_0(980)$ and $a_0(980)$ resonances on proton targets
• The kaonic atoms research program at DAΦNE: from SIDDHARTA to SIDDHARTA-2
• Strong interaction studies with kaonic atoms
• First tests of the full SIDDHARTA-2 experimental apparatus with a 4 He gaseous target