Σp scattering experiment at J-PARC – results of commissioning run –

2019 
The Σp scattering experiment has just been started at J-PARC this year (2018). We made ”Σ beam factory” a reality where a beam with an intensity of more than 5 × 105 Σ− beam per day could be produced by using 20 M/spill π− beam. The CATCH system, which is a dedicated system to detect recoil proton from the Σp scattering, operated stably under the high counting rate, and its successful operation was confirmed by identifying the pp scattering events in J-PARC. In the June beam time, the production run of the Σ− p scattering was carried out for 2 days, which was just 10% of the requested beam time. The remaining beam time of the Σ− p channel and the Σ+ p channel will take place in the spring of 2019.The Σp scattering experiment has just been started at J-PARC this year (2018). We made ”Σ beam factory” a reality where a beam with an intensity of more than 5 × 105 Σ− beam per day could be produced by using 20 M/spill π− beam. The CATCH system, which is a dedicated system to detect recoil proton from the Σp scattering, operated stably under the high counting rate, and its successful operation was confirmed by identifying the pp scattering events in J-PARC. In the June beam time, the production run of the Σ− p scattering was carried out for 2 days, which was just 10% of the requested beam time. The remaining beam time of the Σ− p channel and the Σ+ p channel will take place in the spring of 2019.
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