| Autore/i: | G. Piperno | ||||
| Titolo: | First characterisation of the PADME electromagnetic calorimeter | ||||
| Numero: | INFN-20-08/LNF | ||||
| Data: | 26-06-2020 | ||||
| PACS: | |||||
| Pubblicato su: | |||||
| PDF file: | INFN-20-08-LNF.pdf | ||||
| URL: | |||||
| Abstract: | The PADME experiment, hosted at the LNF Beam Test Facility, is searching for a dark photon that decays into dark matter particles. This search is performed looking for the reaction e+ + e- -> A' + γ, where A'; is the dark photon, which cannot be observed directly or via its decay products. A key role in the experiment is played by the electromagnetic calorimeter, which measures the energy and the position of the γ in the final state. From this, the missing four-momentum carried away by the A'; can be evaluated and the particle mass can be inferred. This article will present the process followed for the construction and calibration of the electromagnetic calorimeter of the experiment. The results achieved in terms of equalisation, detection efficiency and energy resolution during the first phase of the experiment, demonstrate the effectiveness of the various devices used to improve the calorimeter performance with respect to first prototypes. |
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