Search for the CP violating decay with the KLOE detector

2013
journal article
conference proceedings
1
dc.abstract.enWe present a new search for the $K_{S}\rightarrow 3\pi ^{0}$ decay performed with the KLOE detector operating at the DAΦNE $\phi$ -factory. The $K_{S}$ mesons were tagged via registration of $K_{L}$ mesons which crossed the drift chamber without decaying and interacted with the KLOE electromagnetic calorimeter. The $K_{S}\rightarrow 3\pi ^{0}$ decay was then searched requiring six prompt photons. To suppress background, originating from fake $K_{S}$ tags and $K_{S}\rightarrow 2\pi ^{0}$ decays with additional two spurious clusters, we have performed a discriminant analysis based on kinematical fit, testing of the signal and background hypotheses and exploiting of the differences in kinematics of the $K_{S}$ decays into $2\pi ^{0}$ and $3\pi ^{0}$. In a sample of about 1.7$\cdot 10^{9} \phi \rightarrow K_{S}K_{L}$ events we have found no candidates in data and simulated background samples. Normalizing to the number of $K_{S}\rightarrow 2\pi^{0}$ events in the same sample, we have set the upper limit on the $K_{S}\rightarrow 3\pi^{0}$ branching ratio BR $\left ( K_{S}\rightarrow 3\pi^{0} \right )< 2.6\cdot 10^{-8}$ at 90% C.L., five times lower than the previous limit. This upper limit can be translated into a limit on the modulus of the $\eta _{000}$ parameter amounting to $\left | \eta _{000} \right |< 0.0088$ at 90% C.L., improving by a factor two the latest direct measurement.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiegopl
dc.conferenceDISCRETE 2012 – Third Symposium on Prospects in the Physics of Discrete Symmetries
dc.conferenceDISCRETE 2012 – Third Symposium on Prospects in the Physics of Discrete Symmetriespl
dc.conference.cityLizbona
dc.conference.countryPortugalia
dc.conference.datefinish2013-12-07
dc.conference.datestart2013-12-03
dc.conference.indexscopustrue
dc.conference.indexwostrue
dc.contributor.authorSilarski, Michał - 103624 pl
dc.contributor.authorBabusci, D.pl
dc.contributor.authorBadoni, D.pl
dc.contributor.authorPytko, Izabela - 115077 pl
dc.contributor.authorBencivenni, G.pl
dc.contributor.authorBini, C.pl
dc.contributor.authorBloise, C.pl
dc.contributor.authorBossi, F.pl
dc.contributor.authorBranchini, P.pl
dc.contributor.authorBudano, A.pl
dc.contributor.authorCaldeira Balkeståhl, L.pl
dc.contributor.authorCapon, G.pl
dc.contributor.authorCeradini, F.pl
dc.contributor.authorCiambrone, P.pl
dc.contributor.authorCurciarello, F.pl
dc.contributor.authorCzerwiński, Eryk - 102850 pl
dc.contributor.authorDanè, E.pl
dc.contributor.authorDe Leo, V.pl
dc.contributor.authorDe Lucia, E.pl
dc.contributor.authorDe Robertis, G.pl
dc.contributor.authorDe Santis, A.pl
dc.contributor.authorDi Domenico, A.pl
dc.contributor.authorDi Donato, C.pl
dc.contributor.authorDi Salvo, R.pl
dc.contributor.authorDomenici, D.pl
dc.contributor.authorErriquez, O.pl
dc.contributor.authorFanizzi, G.pl
dc.contributor.authorFantini, A.pl
dc.contributor.authorFelici, G.pl
dc.contributor.authorFiore, S.pl
dc.contributor.authorFranzini, P.pl
dc.contributor.authorGauzzi, P.pl
dc.contributor.authorGiardina, G.pl
dc.contributor.authorGiovannella, S.pl
dc.contributor.authorGonnella, F.pl
dc.contributor.authorGraziani, E.pl
dc.contributor.authorHappacher, F.pl
dc.contributor.authorHeijkenskjold, L.pl
dc.contributor.authorHoistad, B.pl
dc.contributor.authorIafolla, L.pl
dc.contributor.authorJacewicz, M.pl
dc.contributor.authorJohansson, T.pl
dc.contributor.authorKacprzak, K.pl
dc.contributor.authorKupsc, A.pl
dc.contributor.authorLee-Franzini, J.pl
dc.contributor.authorLeverington, B.pl
dc.contributor.authorLoddo, F.pl
dc.contributor.authorLoffredo, S.pl
dc.contributor.authorMandaglio, G.pl
dc.contributor.authorMartemianov, M.pl
dc.contributor.authorMartini, M.pl
dc.contributor.authorMascolo, M.pl
dc.contributor.authorMessi, R.pl
dc.contributor.authorMiscetti, S.pl
dc.contributor.authorMorello, G.pl
dc.contributor.authorMoricciani, D.pl
dc.contributor.authorMoskal, Paweł - 100401 pl
dc.contributor.authorNguyen, F.pl
dc.contributor.authorPasseri, A.pl
dc.contributor.authorPatera, V.pl
dc.contributor.authorPrado Longhi, I.pl
dc.contributor.authorRanieri, A.pl
dc.contributor.authorRedmer, C. F.pl
dc.contributor.authorSantangelo, P.pl
dc.contributor.authorSarra, I.pl
dc.contributor.authorSchioppa, M.pl
dc.contributor.authorSciascia, B.pl
dc.contributor.authorTaccini, C.pl
dc.contributor.authorTortora, L.pl
dc.contributor.authorVenanzoni, G.pl
dc.contributor.authorWiślicki, W.pl
dc.contributor.authorWolke, M.pl
dc.contributor.authorZdebik, Jarosław - 134047 pl
dc.contributor.institutionKLOE-2 Collaborationpl
dc.date.accessioned2015-07-30T10:35:36Z
dc.date.available2015-07-30T10:35:36Z
dc.date.issued2013pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.additionalAutorka Izabela Pytko podpisana jako: Izabela Balwierz-Pytko.pl
dc.description.conftypeinternationalpl
dc.description.publication0,5pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume447pl
dc.identifier.articleid012028pl
dc.identifier.doi10.1088/1742-6596/447/1/012028pl
dc.identifier.eissn1742-6596pl
dc.identifier.issn1742-6588pl
dc.identifier.projectROD UJ / Ppl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/14292
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 3.0 Polska*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/legalcode*
dc.share.typeotwarte czasopismo
dc.subtypeConferenceProceedingspl
dc.titleSearch for the CP violating $K_{S} \rightarrow 3\pi^{0}$ decay with the KLOE detectorpl
dc.title.journalJournal of Physics. Conference Seriespl
dc.title.volumeDISCRETE 2012 – Third Symposium on Prospects in the Physics of Discrete Symmetries : 3-7 December 2013, IST Congress Center, Lisbon, Portugalpl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
We present a new search for the $K_{S}\rightarrow 3\pi ^{0}$ decay performed with the KLOE detector operating at the DAΦNE $\phi$ -factory. The $K_{S}$ mesons were tagged via registration of $K_{L}$ mesons which crossed the drift chamber without decaying and interacted with the KLOE electromagnetic calorimeter. The $K_{S}\rightarrow 3\pi ^{0}$ decay was then searched requiring six prompt photons. To suppress background, originating from fake $K_{S}$ tags and $K_{S}\rightarrow 2\pi ^{0}$ decays with additional two spurious clusters, we have performed a discriminant analysis based on kinematical fit, testing of the signal and background hypotheses and exploiting of the differences in kinematics of the $K_{S}$ decays into $2\pi ^{0}$ and $3\pi ^{0}$. In a sample of about 1.7$\cdot 10^{9} \phi \rightarrow K_{S}K_{L}$ events we have found no candidates in data and simulated background samples. Normalizing to the number of $K_{S}\rightarrow 2\pi^{0}$ events in the same sample, we have set the upper limit on the $K_{S}\rightarrow 3\pi^{0}$ branching ratio BR $\left ( K_{S}\rightarrow 3\pi^{0} \right )< 2.6\cdot 10^{-8}$ at 90% C.L., five times lower than the previous limit. This upper limit can be translated into a limit on the modulus of the $\eta _{000}$ parameter amounting to $\left | \eta _{000} \right |< 0.0088$ at 90% C.L., improving by a factor two the latest direct measurement.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
dc.conference
DISCRETE 2012 – Third Symposium on Prospects in the Physics of Discrete Symmetries
dc.conferencepl
DISCRETE 2012 – Third Symposium on Prospects in the Physics of Discrete Symmetries
dc.conference.city
Lizbona
dc.conference.country
Portugalia
dc.conference.datefinish
2013-12-07
dc.conference.datestart
2013-12-03
dc.conference.indexscopus
true
dc.conference.indexwos
true
dc.contributor.authorpl
Silarski, Michał - 103624
dc.contributor.authorpl
Babusci, D.
dc.contributor.authorpl
Badoni, D.
dc.contributor.authorpl
Pytko, Izabela - 115077
dc.contributor.authorpl
Bencivenni, G.
dc.contributor.authorpl
Bini, C.
dc.contributor.authorpl
Bloise, C.
dc.contributor.authorpl
Bossi, F.
dc.contributor.authorpl
Branchini, P.
dc.contributor.authorpl
Budano, A.
dc.contributor.authorpl
Caldeira Balkeståhl, L.
dc.contributor.authorpl
Capon, G.
dc.contributor.authorpl
Ceradini, F.
dc.contributor.authorpl
Ciambrone, P.
dc.contributor.authorpl
Curciarello, F.
dc.contributor.authorpl
Czerwiński, Eryk - 102850
dc.contributor.authorpl
Danè, E.
dc.contributor.authorpl
De Leo, V.
dc.contributor.authorpl
De Lucia, E.
dc.contributor.authorpl
De Robertis, G.
dc.contributor.authorpl
De Santis, A.
dc.contributor.authorpl
Di Domenico, A.
dc.contributor.authorpl
Di Donato, C.
dc.contributor.authorpl
Di Salvo, R.
dc.contributor.authorpl
Domenici, D.
dc.contributor.authorpl
Erriquez, O.
dc.contributor.authorpl
Fanizzi, G.
dc.contributor.authorpl
Fantini, A.
dc.contributor.authorpl
Felici, G.
dc.contributor.authorpl
Fiore, S.
dc.contributor.authorpl
Franzini, P.
dc.contributor.authorpl
Gauzzi, P.
dc.contributor.authorpl
Giardina, G.
dc.contributor.authorpl
Giovannella, S.
dc.contributor.authorpl
Gonnella, F.
dc.contributor.authorpl
Graziani, E.
dc.contributor.authorpl
Happacher, F.
dc.contributor.authorpl
Heijkenskjold, L.
dc.contributor.authorpl
Hoistad, B.
dc.contributor.authorpl
Iafolla, L.
dc.contributor.authorpl
Jacewicz, M.
dc.contributor.authorpl
Johansson, T.
dc.contributor.authorpl
Kacprzak, K.
dc.contributor.authorpl
Kupsc, A.
dc.contributor.authorpl
Lee-Franzini, J.
dc.contributor.authorpl
Leverington, B.
dc.contributor.authorpl
Loddo, F.
dc.contributor.authorpl
Loffredo, S.
dc.contributor.authorpl
Mandaglio, G.
dc.contributor.authorpl
Martemianov, M.
dc.contributor.authorpl
Martini, M.
dc.contributor.authorpl
Mascolo, M.
dc.contributor.authorpl
Messi, R.
dc.contributor.authorpl
Miscetti, S.
dc.contributor.authorpl
Morello, G.
dc.contributor.authorpl
Moricciani, D.
dc.contributor.authorpl
Moskal, Paweł - 100401
dc.contributor.authorpl
Nguyen, F.
dc.contributor.authorpl
Passeri, A.
dc.contributor.authorpl
Patera, V.
dc.contributor.authorpl
Prado Longhi, I.
dc.contributor.authorpl
Ranieri, A.
dc.contributor.authorpl
Redmer, C. F.
dc.contributor.authorpl
Santangelo, P.
dc.contributor.authorpl
Sarra, I.
dc.contributor.authorpl
Schioppa, M.
dc.contributor.authorpl
Sciascia, B.
dc.contributor.authorpl
Taccini, C.
dc.contributor.authorpl
Tortora, L.
dc.contributor.authorpl
Venanzoni, G.
dc.contributor.authorpl
Wiślicki, W.
dc.contributor.authorpl
Wolke, M.
dc.contributor.authorpl
Zdebik, Jarosław - 134047
dc.contributor.institutionpl
KLOE-2 Collaboration
dc.date.accessioned
2015-07-30T10:35:36Z
dc.date.available
2015-07-30T10:35:36Z
dc.date.issuedpl
2013
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.additionalpl
Autorka Izabela Pytko podpisana jako: Izabela Balwierz-Pytko.
dc.description.conftypepl
international
dc.description.publicationpl
0,5
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
447
dc.identifier.articleidpl
012028
dc.identifier.doipl
10.1088/1742-6596/447/1/012028
dc.identifier.eissnpl
1742-6596
dc.identifier.issnpl
1742-6588
dc.identifier.projectpl
ROD UJ / P
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/14292
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa 3.0 Polska
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses/by/3.0/legalcode
dc.share.type
otwarte czasopismo
dc.subtypepl
ConferenceProceedings
dc.titlepl
Search for the CP violating $K_{S} \rightarrow 3\pi^{0}$ decay with the KLOE detector
dc.title.journalpl
Journal of Physics. Conference Series
dc.title.volumepl
DISCRETE 2012 – Third Symposium on Prospects in the Physics of Discrete Symmetries : 3-7 December 2013, IST Congress Center, Lisbon, Portugal
dc.typepl
JournalArticle
dspace.entity.type
Publication

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