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Search for nonstandard neutrino interactions with IceCube DeepCore
Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia..
DESY, D-15738 Zeuthen, Germany..
Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch, New Zealand..
Univ Libre Bruxelles, Sci Fac, CP230, B-1050 Brussels, Belgium..
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2018 (engelsk)Inngår i: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 97, nr 7, artikkel-id 072009Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

As atmospheric neutrinos propagate through the Earth, vacuumlike oscillations are modified by Standard Model neutral-and charged-current interactions with electrons. Theories beyond the Standard Model introduce heavy, TeV-scale bosons that can produce nonstandard neutrino interactions. These additional interactions may modify the Standard Model matter effect producing a measurable deviation from the prediction for atmospheric neutrino oscillations. The result described in this paper constrains nonstandard interaction parameters, building upon a previous analysis of atmospheric muon-neutrino disappearance with three years of IceCube DeepCore data. The best fit for the muon to tau flavor changing term is epsilon(mu tau) = -0.0005, with a 90% C.L. allowed range of -0.0067 < epsilon(mu tau) < 0.0081. This result is more restrictive than recent limits from other experiments for.mu t. Furthermore, our result is complementary to a recent constraint on epsilon(mu tau) using another publicly available IceCube high-energy event selection. Together, they constitute the world's best limits on nonstandard interactions in the mu - tau sector.

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AMER PHYSICAL SOC , 2018. Vol. 97, nr 7, artikkel-id 072009
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URN: urn:nbn:se:uu:diva-352476DOI: 10.1103/PhysRevD.97.072009ISI: 000429775500001OAI: oai:DiVA.org:uu-352476DiVA, id: diva2:1215523
Forskningsfinansiär
Swedish Research CouncilSwedish Polar Research SecretariatSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationTilgjengelig fra: 2018-06-08 Laget: 2018-06-08 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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