Advances in High Energy Physics (Jan 2018)

Feasibility Study of the Time Reversal Symmetry Tests in Decay of Metastable Positronium Atoms with the J-PET Detector

  • A. Gajos,
  • C. Curceanu,
  • E. Czerwiński,
  • K. Dulski,
  • M. Gorgol,
  • N. Gupta-Sharma,
  • B. C. Hiesmayr,
  • B. Jasińska,
  • K. Kacprzak,
  • Ł. Kapłon,
  • D. Kisielewska,
  • G. Korcyl,
  • P. Kowalski,
  • T. Kozik,
  • W. Krzemień,
  • E. Kubicz,
  • M. Mohammed,
  • Sz. Niedźwiecki,
  • M. Pałka,
  • M. Pawlik-Niedźwiecka,
  • L. Raczyński,
  • J. Raj,
  • Z. Rudy,
  • S. Sharma,
  • Shivani,
  • R. Shopa,
  • M. Silarski,
  • M. Skurzok,
  • W. Wiślicki,
  • B. Zgardzińska,
  • M. Zieliński,
  • P. Moskal

DOI
https://doi.org/10.1155/2018/8271280
Journal volume & issue
Vol. 2018

Abstract

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This article reports on the feasibility of testing of the symmetry under reversal in time in a purely leptonic system constituted by positronium atoms using the J-PET detector. The present state of T symmetry tests is discussed with an emphasis on the scarcely explored sector of leptonic systems. Two possible strategies of searching for manifestations of T violation in nonvanishing angular correlations of final state observables in the decay of metastable triplet states of positronium available with J-PET are proposed and discussed. Results of a pilot measurement with J-PET and assessment of its performance in reconstruction of three-photon decays are shown along with an analysis of its impact on the sensitivity of the detector for the determination of T-violation sensitive observables.