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Non-standard interactions versus non-unitary lepton flavor mixing at a neutrino factory
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0002-3525-8349
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.
2010 (engelsk)Inngår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2010, nr 04, s. 041-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The impact of heavy mediators on neutrino oscillations is typically described by non-standard four-fermion interactions (NSIs) or non-unitarity (NU). We focus on leptonic dimension-six effective operators which do not produce charged lepton flavor violation. These operators lead to particular correlations among neutrino production, propagation, and detection non-standard effects. We point out that these NSIs and NU phenomenologically lead, in fact, to very similar effects for a neutrino factory, for completely different fundamental reasons. We discuss how the parameters and probabilities are related in this case, and compare the sensitivities. We demonstrate that the NSIs and NU can, in principle, be distinguished for large enough effects at the example of non-standard effects in the mu-tau-sector, which basically corresponds to differentiating between scalars and fermions as heavy mediators as leading order effect. However, we find that a near detector at superbeams could provide very synergistic information, since the correlation between source and matter NSIs is broken for hadronic neutrino production, while NU is a fundamental effect present at any experiment.

sted, utgiver, år, opplag, sider
Springer-Verlag , 2010. Vol. 2010, nr 04, s. 041-
Emneord [en]
Beyond Standard Model, Neutrino Physics, CP violation
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-27904DOI: 10.1007/JHEP04(2010)041ISI: 000277473100029Scopus ID: 2-s2.0-77954923560OAI: oai:DiVA.org:kth-27904DiVA, id: diva2:383049
Forskningsfinansiär
Swedish Research Council, 621-2008-4210EU, FP7, Seventh Framework Programme, 212372
Merknad
QC 20110104Tilgjengelig fra: 2011-06-21 Laget: 2011-01-03 Sist oppdatert: 2017-12-11bibliografisk kontrollert

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