The kaonic helium-4 3d → 2p X-ray transition was measured in a gaseous target, where Compton scattering in helium is negligible. The X-rays were detected with large-area Silicon Drift Detectors (SDDs) using the timing information of the K+K− pairs produced by φ decays at the DANE e+e−collider. A new value of the strong interaction shift of the kaonic 4He 2p state was determined to be 0±6 (stat) ±2 (syst) eV, which confirms the recently obtained result by the KEK-PS E570 group.
Kaonic helium X-ray measurement in SIDDHARTA
BOMBELLI, LUCA;FIORINI, CARLO ETTORE;FRIZZI, TOMMASO;LONGONI, ANTONIO FRANCESCO;
2009-01-01
Abstract
The kaonic helium-4 3d → 2p X-ray transition was measured in a gaseous target, where Compton scattering in helium is negligible. The X-rays were detected with large-area Silicon Drift Detectors (SDDs) using the timing information of the K+K− pairs produced by φ decays at the DANE e+e−collider. A new value of the strong interaction shift of the kaonic 4He 2p state was determined to be 0±6 (stat) ±2 (syst) eV, which confirms the recently obtained result by the KEK-PS E570 group.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
1-s2.0-S0370269309012490-main.pdf
Accesso riservato
:
Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione
360.32 kB
Formato
Adobe PDF
|
360.32 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
