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Gain fractions of future neutrino oscillation facilities over T2K and NOvA
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0001-5948-9152
2013 (engelsk)Inngår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, nr 7, s. 159-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We evaluate the probability of future neutrino oscillation facilities to discover leptonic CP violation and/or measure the neutrino mass hierarchy. We study how this probability is affected by positive or negative hints for these observables to be found at T2K and NO nu A. We consider the following facilities: LBNE; T2HK; and the 10 GeV Neutrino Factory (NF10), and show how their discovery probabilities change with the running time of T2K and NO nu A conditioned to their results. We find that, if after 15 years T2K and NO nu A have not observed a 90% CL hint of CP violation, then LBNE and T2HK have less than a 10% chance of achieving a 5 sigma discovery, whereas NF10 still has a similar to 40% chance to do so. Conversely, if T2K and NO nu A have an early 90% CL hint in 5 years from now, T2HK has a rather large chance to achieve a 5 sigma CP violation discovery (75% or 55%, depending on whether the mass hierarchy is known or not). This is to be compared with the 90% (30%) probability that NF10 (LBNE) would have to observe the same signal at 5 sigma. A hierarchy measurement at 5 sigma is achievable at both LBNE and NF10 with more than 90% probability, irrespectively of the outcome of T2K and NO nu A. We also find that if LBNE or a similar very long baseline super-beam is the only next generation facility to be built, then it is very useful to continue running T2K and NO nu A (or at least T2K) beyond their original schedule in order to increase the CP violation discovery chances, given their complementarity.

sted, utgiver, år, opplag, sider
2013. nr 7, s. 159-
Emneord [en]
Neutrino Physics, CP violation
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-129476DOI: 10.1007/JHEP07(2013)159ISI: 000323202900072Scopus ID: 2-s2.0-84881420296OAI: oai:DiVA.org:kth-129476DiVA, id: diva2:652547
Forskningsfinansiär
EU, FP7, Seventh Framework Programme, PITN-GA-2011-289442
Merknad

QC 20131001

Tilgjengelig fra: 2013-10-01 Laget: 2013-09-30 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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