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Reassessing the sensitivity to leptonic CP violation
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0001-5948-9152
2015 (Engelska)Ingår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, nr 3, artikel-id 005Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We 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.

Ort, förlag, år, upplaga, sidor
2015. nr 3, artikel-id 005
Nyckelord [en]
Neutrino Physics, CP violation, Statistical Methods
Nationell ämneskategori
Fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-163978DOI: 10.1007/JHEP03(2015)005ISI: 000351359600005OAI: oai:DiVA.org:kth-163978DiVA, id: diva2:809790
Forskningsfinansiär
EU, FP7, Sjunde ramprogrammet, PCIG11-GA-2012-321582
Anmärkning

QC 20150505

Tillgänglig från: 2015-05-05 Skapad: 2015-04-13 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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Blennow, Mattias

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