Reassessing the sensitivity to leptonic CP violation

Simple item page
dc.contributor.authorBlennow, Mattiasen
dc.contributor.authorColoma, Pilaren
dc.contributor.authorFernandez-Martinez, Enriqueen
dc.contributor.departmentCenter for Neutrino Physicsen
dc.date.accessioned2019-03-11T15:27:13Zen
dc.date.available2019-03-11T15:27:13Zen
dc.date.issued2015-03-02en
dc.description.abstractWe address the validity of the usual procedure to determine the sensitivity of neutrino oscillation experiments to CP violation. An explicit calibration of the test statistic is performed through Monte Carlo simulations for several experimental setups. We find that significant deviations from a chi(2) distribution with one degree of freedom occur for experimental setups with low sensitivity to ffi. In particular, when the allowed region to which ffi is constrained at a given confidence level is comparable to the whole allowed range, the cyclic nature of the variable manifests and the premises of Wilk's theorem are violated. This leads to values of the test statistic significantly lower than a chi(2) distribution at that confidence level. On the other hand, for facilities which can place better constraints on ffi the cyclic nature of the variable is hidden and, as the potential of the facility improves, the values of the test statistics first become slightly higher than and then approach asymptotically a chi(2) distribution. The role of sign degeneracies is also discussed.en
dc.description.notesWe are very grateful to Thomas Schwetz for valuable discussions and encouragement. We warmly thank Peter Ballett for pointing out an inconsistency in the treatment of the systematic errors in the first version of the manuscript, and Pilar Hernandez for illuminating discussions. This work was supported by the Goran Gustafsson Foundation [MB] and by the U.S. Department of Energy under award number DE-SC0003915 [PC]. EFM acknowledges financial support by the European Union through the FP7 Marie Curie Actions CIG NeuProbes (PCIG11-GA-2012-321582) and the ITN INVISIBLES (PITN-GA-2011-289442), and the Spanish MINECO through the "Ramon y Cajal" programme (RYC2011-07710) and through the project FPA2009-09017. We also thank the Spanish MINECO (Centro de excelencia Severo Ochoa Program) under grant SEV-2012-0249 as well as the Nordita Scientific program "News in Neutrino Physics", where part of this work was performed.en
dc.description.sponsorshipGoran Gustafsson Foundationen
dc.description.sponsorshipU.S. Department of Energy [DE-SC0003915]en
dc.description.sponsorshipEuropean Union [PCIG11-GA-2012-321582]en
dc.description.sponsorshipITN INVISIBLES [PITN-GA-2011-289442]en
dc.description.sponsorshipSpanish MINECO [RYC2011-07710, FPA2009-09017]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1007/JHEP03(2015)005en
dc.identifier.issn1029-8479en
dc.identifier.issue3en
dc.identifier.other5en
dc.identifier.urihttp://hdl.handle.net/10919/88409en
dc.language.isoen_USen
dc.publisherSpringeren
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectNeutrino Physicsen
dc.subjectCP violationen
dc.subjectStatistical Methodsen
dc.titleReassessing the sensitivity to leptonic CP violationen
dc.title.serialJournal of High Energy Physicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Blennow2015_Article_ReassessingTheSensitivityToLep.pdf
Size:
572.96 KB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Scholarly Works, Center for Neutrino Physics