Pion induced reaction with carbon and polyethylene targets obtained by HADES-GSI in 2014

FAIRNESS 2016

Rodríguez-Ramos, Pablo^1,2

Nuclear Physics Institute, Academy of Sciences of the Czech Republic, e, Czech Republic^1

Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Prague, Czech Republic^2

关键词: Baryonic resonances;    Beam momentum;    Carbon targets;    Dileptons;    Polyethylene target;    Resonance region;    Subthreshold;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/742/1/012029/pdf
DOI  :  10.1088/1742-6596/742/1/012029

来源: IOP

【 摘 要 】

In the summer of 2014, HADES was conducting measurements with secondary pion-beam using different targets. The program was devoted to measure dilepton radiation from baryonic resonances. In particular we investigated a sub-threshold coupling of ρ to baryonic resonances in the second resonance region (N(1520), N(1535)). Most of the beam time was dedicated to measurement of e+e-production from Polyethylene target at pion beam momentum of 0.69 GeV/c. In addition we run part of the time with pure carbon target. This allow us to study exclusive π-+ p → ne-e+channel. The normalization of spectra has been done using elastic scattering of pion on proton and carbon. The simulations of dilepton yields for π0, Δ and N(1520) Dalitz decay using PLUTO was carried out.