Neutrinos, DUNE and the world best bound on CPT invariance
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Neutrinos, DUNE and the world best bound on CPT invariance

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Neutrinos, DUNE and the world best bound on CPT invariance

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dc.contributor.author Barenboim Szuchman, Gabriela Alejandra
dc.contributor.author Ternes, C. A.
dc.contributor.author Tórtola Baixauli, María Amparo
dc.date.accessioned 2019-05-14T14:34:51Z
dc.date.available 2019-05-14T14:34:51Z
dc.date.issued 2018
dc.identifier.uri http://hdl.handle.net/10550/70158
dc.description.abstract CPT symmetry, the combination of Charge Conjugation, Parity and Time reversal, is a cornerstone of our model building strategy and therefore the repercussions of its potential violation will severely threaten the most extended tool we currently use to describe physics, i.e. local relativistic quantum fields. However, limits on its conservation from the Kaon system look indeed imposing. In this work we will show that neutrino oscillation experiments can improve this limit by several orders of magnitude and therefore are an ideal tool to explore the foundations of our approach to Nature. Strictly speaking testing CPT violation would require an explicit model for how CPT is broken and its effects on physics. Instead, what is presented in this paper is a test of one of the predictions of CPT conservation, i.e., the same mass and mixing parameters in neutrinos and antineutrinos. In order to do that we calculate the current CPT bound on all the neutrino mixing parameters and study the sensitivity of the DUNE experiment to such an observable. After deriving the most updated bound on CPT from neutrino oscillation data, we show that, if the recent T2K results turn out to be the true values of neutrino and antineutrino oscillations, DUNE would measure the fallout of CPT conservation at more than 3σ. Then, we study the sensitivity of the experiment to measure CPT invariance in general, finding that DUNE will be able to improve the current bounds on ∆(∆m2 31) by at least one order of magnitude. We also study the sensitivity to the other oscillation parameters. Finally we show that, if CPT is violated in nature, combining neutrino with antineutrino data in oscillation analysis will produce imposter solutions.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 2018, vol. 780, p. 631-637
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Barenboim Szuchman, Gabriela Alejandra Ternes, C. A. Tórtola Baixauli, María Amparo 2018 Neutrinos, DUNE and the world best bound on CPT invariance Physics Letters B 780 631 637
dc.subject Partícules (Física nuclear)
dc.title Neutrinos, DUNE and the world best bound on CPT invariance
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-05-14T14:34:51Z
dc.identifier.doi https://doi.org/10.1016/j.physletb.2018.03.060
dc.identifier.idgrec 126832

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