ELFT HÍRADÓ

[Ferenc Siklér <sikler.ferenc AT wigner.hu>]

Kedves kollégák,

 Meghívunk minden érdeklődőt a Wigner FK Nagyenergiás Fizikai Osztályának jövő
hétfői szemináriumára, október 24., hétfő 10:00-ra.

 Részletek itt, absztrakt alább:
 https://indico.wigner.hu/event/1439/

 [Az előadás a zoom-on keresztül is követhető, csatlakozási infók a fenti
leírásban.]

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Study of the K+ -> e+ nu e+ e- Decay with the NA62 Experiment

by Anna Fehérkuti (Eötvös U and Wigner RCP, Budapest)

I joined a study concerning measurements of the branching ratio and the form 
factors of the rare decay K+ -> e+ nu e+ e- (Ke2ee) with the NA62 experiment. 
With the data collected between 2016 and 2021, NA62 has currently a Ke2ee 
sample, large enough to significantly improve the state of the art. Preliminary 
studies show that it is possible to reach an almost background-free selection 
of Ke2ee decays, while maintaining a sizeable amount of signal events. In 2022, 
new data is being collected with the opportunity to achieve the largest Ke2ee 
sample in the world, suitable for improving the statistical uncertainty of the 
branching ratio and the form factors measurements. I took part in the analysis 
of the 2017-2018 data sample: with the NA62 framework, producing histograms 
both with data and Monte Carlo simulations, building a signal selection, 
statistically interpreting the data and evaluating uncertainties.
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Üdvözlettel,
 Siklér Ferenc