Trilateration-based reconstruction of ortho -positronium decays into three photons with the J-PET detector

Gajos, A.; Kamińska, D.; Czerwiński, E.; Alfs, D.; Bednarski, T.; Białas, P.; Głowacz, B.; Gorgol, M.; Jasińska, B.; Kapłon, Ł.; Korcyl, G.; Kowalski, P.; Kozik, T.; Krzemień, W.; Kubicz, E.; Mohammed, M.; Niedźwiecki, Sz.; Pałka, M.; Pawlik-Niedźwiecka, M.; Raczyński, L.; Rudy, Z.; Rundel, O.; Sharma, N.G.; Silarski, M.; Słomski, A.; Strzelecki, Adam; Wieczorek, A.; Wiślicki, W.; Zgardzińska, B.; Zieliński, Marcin; Moskal, P.

doi:10.1016/j.nima.2016.02.069

Cited by 59 publications

(82 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…J-PET being a novel solution in the Positron Emmision Tomography provides also new opportunities to study fundamental physics in the leptonic sector [1,2,11,12] as well as in the life-and materialsciences [5,[13][14][15]. In particular it has a potential for improvement of present limits [16,17] of the decays of positronium [1].…”

Section: Discussionmentioning

confidence: 99%

“…Positronium created this way decays into three photons which can interact via Compton effect with scintillator material. Position of the positronium annihilation can be determined based on time and positions of interaction of photons with scintillator using trilateration-based reconstruction [11]. Registration of de-excitation photon from the excited daughter nucleus created in the beta-plus decay enables also estimation of positronium lifetime.…”

Section: Discrete Symmetries In Decays Of Positronium Atomsmentioning

confidence: 99%

See 1 more Smart Citation

J-PET detector system for studies of the electron-positron annihilations

et al. 2016

Self Cite

View full text Add to dashboard Cite

Abstract. Jagiellonian Positron Emission Tomograph (J-PET) has been recently constructed at the Jagiellonian University as a prototype of a cost-effective scanner for the metabolic imaging of the whole human body. J-PET detector is optimized for the measurement of momentum and polarization of photons from the electron-positron annihilations. It is built out of strips of plastic scintillators, forming three cylindrical layers. As detector of gamma quanta it will be used for studies of discrete symmetries and multiparticle entanglement of photons originating from the decays of ortho-positronium atoms.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discrete Symmetries In Decays Of Positronium Atomsmentioning

confidence: 99%

J-PET detector system for studies of the electron-positron annihilations

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…The polarization axis varies from event to event, but it can be determined from the known points of the positron emission and positronium annihilation. The annihilation place will be reconstructed based on the trilateration method [32]. The positronium target will be inserted inside the J-PET detector.…”

Section: Experimental Methodsmentioning

confidence: 99%

Studies of discrete symmetries in a purely leptonic system using the Jagiellonian Positron Emission Tomograph

et al. 2016

Self Cite

View full text Add to dashboard Cite

Abstract. Discrete symmetries such as parity (P), charge-conjugation (C) and time reversal (T) are of fundamental importance in physics and cosmology. Breaking of charge conjugation symmetry (C) and its combination with parity (CP) constitute necessary conditions for the existence of the asymmetry between matter and antimatter in the observed Universe. The presently known sources of discrete symmetries violations can account for only a tiny fraction of the excess of matter over antimatter. So far CP and T symmetries violations were observed only for systems involving quarks and they were never reported for the purely leptonic objects. In this article we describe briefly an experimental proposal for the test of discrete symmetries in the decays of positronium atom which is made exclusively of leptons. The experiments are conducted by means of the Jagiellonian Positron Emission Tomograph (J-PET) which is constructed from strips of plastic scintillators enabling registration of photons from the positronium annihilation. J-PET tomograph together with the positronium target system enable to measure expectation values for the discrete symmetries odd operators constructed from (i) spin vector of the ortho-positronium atom, (ii) momentum vectors of photons originating from the decay of positronium, and (iii) linear polarization direction of annihilation photons. Linearly polarized positronium will be produced in the highly porous aerogel or polymer targets, exploiting longitudinally polarized positrons emitted by the sodium 22 Na isotope. Information about the polarization vector of orthopositronium will be available on the event by event basis and will be reconstructed from the known position of the positron source and the reconstructed position of the orthopositronium annihilation. In 2016 the first tests and calibration runs are planned, and the data collection with high statistics will commence in the year 2017.

show abstract

“…The emitted positrons are stopped in the cylinder wall producing o-Ps which may undergo annihilation to 3γ. Due to the coplanarity of annihilation gamma quanta momentum vectors ( k i ) the annihilation point and time is reconstructed with a dedicated method based on the trilateration [25]. Known directions of photons from annihilation of positronium into 3γ enables to calculate the energy of each photon as described in Ref.…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

Studies of discrete symmetries in decays of positronium atoms

Czerwiński

Curceanu

Dulski

et al. 2018

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract.A positronium -a bound state of electron and positron -is an eigenstate of parity and charge conjugation operators which decays into photons. It is a unique laboratory to study discrete symmetries whose precision is limited, in principle, by the effects due to the weak interactions expected at the level of 10 −14 and photon-photon interactions expected at the level of 10 −9 . The Jagiellonian Positron Emission Tomograph (J-PET) is a detector for medical imaging as well as for physics studies involving detection of electronpositron annihilation into photons. The physics case covers the areas of discrete symmetries studies and genuine multipartite entanglement. The J-PET detector has high angular and time resolution and allows for determination of spin of the positronium and the momenta and polarization vectors of annihilation quanta. In this article, we present the potential of the J-PET system for studies of discrete symmetries in decays of positronium atoms.

show abstract

Trilateration-based reconstruction of ortho -positronium decays into three photons with the J-PET detector

Cited by 59 publications

References 28 publications

J-PET detector system for studies of the electron-positron annihilations

J-PET detector system for studies of the electron-positron annihilations

Studies of discrete symmetries in a purely leptonic system using the Jagiellonian Positron Emission Tomograph

Studies of discrete symmetries in decays of positronium atoms

Contact Info

Product

Resources

About