We have been searching for the Θ+ pentaquark via the π−p → K−X reaction at the J-PARC hadron facility. No peak structure was observed in the missing mass spectrum obtained at 1.92 GeV/c beam mo- mentum. The upper limit for the production cross section averaged over the scattering angle from 2◦ to 15◦ in the laboratory frame was derived to be 0.26 μb/sr. In order to make a more stringent constraint we have also performed a measurement at 2.0 GeV/c. Present analysis status of this new data is reported.
Search for the pentaquark at J-PARC
BOTTA, Elena;MARCELLO, Simonetta;
2013-01-01
Abstract
We have been searching for the Θ+ pentaquark via the π−p → K−X reaction at the J-PARC hadron facility. No peak structure was observed in the missing mass spectrum obtained at 1.92 GeV/c beam mo- mentum. The upper limit for the production cross section averaged over the scattering angle from 2◦ to 15◦ in the laboratory frame was derived to be 0.26 μb/sr. In order to make a more stringent constraint we have also performed a measurement at 2.0 GeV/c. Present analysis status of this new data is reported.
File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
NPA_914_2013_91.pdf
Accesso aperto
Tipo di file:
PDF EDITORIALE
Dimensione
188.31 kB
Formato
Adobe PDF
|
188.31 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
