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

2016
journal article
conference proceedings
cris.lastimport.wos2024-04-09T20:57:34Z
dc.abstract.enDiscrete 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 22Na 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.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiegopl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Zakład Technologii Gierpl
dc.conferenceMESON 2016 – 14th International Workshop on Meson Production, Properties and Interactionpl
dc.conference.cityKraków
dc.conference.countryPolska
dc.conference.datefinish2016-06-07
dc.conference.datestart2016-06-02
dc.conference.indexscopustrue
dc.conference.indexwostrue
dc.contributor.authorMoskal, Paweł - 100401 pl
dc.contributor.authorAlfs, Dominikapl
dc.contributor.authorBednarski, Tomasz - 115868 pl
dc.contributor.authorBiałas, Piotr - 127296 pl
dc.contributor.authorCurceanu, C.pl
dc.contributor.authorCzerwiński, Eryk - 102850 pl
dc.contributor.authorDulski, Kamil - 204579 pl
dc.contributor.authorGajos, Aleksander - 164087 pl
dc.contributor.authorGłowacz, Bartosz - 135174 pl
dc.contributor.authorGupta-Sharma, Neha - 235987 pl
dc.contributor.authorGorgol, M.pl
dc.contributor.authorHiesmayr, B. C.pl
dc.contributor.authorJasińska, B.pl
dc.contributor.authorKisielewska, Daria - 179828 pl
dc.contributor.authorKhreptak, Aleksander - 262561 pl
dc.contributor.authorKorcyl, Grzegorz - 107362 pl
dc.contributor.authorKowalski, P.pl
dc.contributor.authorKrzemień, Wojciech - 135126 pl
dc.contributor.authorKrawczyk, Nikodem - 176270 pl
dc.contributor.authorKubicz, Ewelina - 177092 pl
dc.contributor.authorMohammed, Muhsin - 236400 pl
dc.contributor.authorNiedźwiecki, Szymon - 115136 pl
dc.contributor.authorPawlik-Niedźwiecka, Monika - 193996 pl
dc.contributor.authorRaczyński, L.pl
dc.contributor.authorRudy, Zbigniew - 100004 pl
dc.contributor.authorSilarski, Michał - 103624 pl
dc.contributor.authorSmyrski, Jerzy - 100030 pl
dc.contributor.authorWieczorek, Anna - 163447 pl
dc.contributor.authorWiślicki, W.pl
dc.contributor.authorZgardzińska, B.pl
dc.contributor.authorZieliński, Marcin - 124902 pl
dc.date.accessioned2017-02-07T15:09:26Z
dc.date.available2017-02-07T15:09:26Z
dc.date.issued2016pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.additionalAutorka Daria Kisielewska podpisana jako Daria Kamińska.pl
dc.description.conftypeinternationalpl
dc.description.versionostateczna wersja wydawcy
dc.description.volume130pl
dc.identifier.articleid07015pl
dc.identifier.doi10.1051/epjconf/201613007015pl
dc.identifier.eissn2100-014Xpl
dc.identifier.issn2101-6275pl
dc.identifier.projectROD UJ / Ppl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/37217
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl*
dc.share.typeotwarte czasopismo
dc.subtypeConferenceProceedingspl
dc.titleStudies of discrete symmetries in a purely leptonic system using the Jagiellonian Positron Emission Tomographpl
dc.title.journalEPJ Web of Conferencespl
dc.title.volumeMESON 2016 – 14th International Workshop on Meson Production, Properties and Interaction : Kraków, Poland, June 2-7, 2016pl
dc.typeJournalArticlepl
dspace.entity.typePublication

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