Invariant mass reconstruction of the η meson in the decay channel π + π − π 0 with the REDTOP experiment

• Published in: Journal of physics. Conference series Vol. 912; no. 1; p. 12034
• Main Authors: Escobar Martínez, S. D., Fabela Enríquez, B., Pedraza Morales, M. I.
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.10.2017
• Subjects: Asymmetry; CP violation; Eta-mesons; Experiments; Invariants; Matter & antimatter; Physics; Pions; Standard model (particle physics); Statistical methods; Symmetry
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/912/1/012034

REDTOP is a novel experiment proposed at the Delivery Ring of Fermilab with the intent of producing more than 1013 η mesons per year to detect possible rare η decays which can be a clear evidence of the existence of Physics Beyond the Standard Model. Such statistics are sufficient for investigating several discrete symmetry violations, searching for new particles and interactions and to perform precision studies. One of the golden processes to study is the η → π + π − π 0 decay [7], where π 0 decays promptly into two photons. In the context of the Standard Model, the dynamics of the charged pions is symmetric in this process. Thus, any mirror asymmetry in the Dalitz plot would be a direct indication of C and CP violation. We present a study on the performance of the REDTOP experiment detector by reconstructing the invariant mass of the final state π + π − γγ using Monte Carlo samples.