Investigation of the proton structure at PANDA-FAIR
A. Dbeyssi*, I. Zimmermann, D. Khaneft on behalf of the PANDA Collaboration
Pre-published on:
February 16, 2018
Published on:
March 20, 2018
Abstract
An important goal of the future ¯PANDA Experiment at FAIR (Darmstadt, Germany) is the investigation of the proton structure. Electromagnetic proton form factors parameterize the electric and magnetic structure of protons. They can be experimentally accessed in the time-like region through the annihilation processes ˉpp→ℓ+ℓ− (ℓ=e,μ), assuming that the interaction takes place through the exchange of one virtual photon. The expected statistical precision for the measurement of proton form factors with ¯PANDA for the process ˉpp→ℓ+ℓ− (ℓ=e,μ) was investigated in the framework of the PANDARoot software for detector simulation and event reconstruction. The signal identification and the suppression of the main background process (ˉpp→π+π−) is studied. Different methods have been used to generate and analyse the processes of interest. The results show that time-like electromagnetic proton form factors can be measured at ¯PANDA with high statistical accuracy over a large kinematical region.
DOI: https://doi.org/10.22323/1.310.0171
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