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T violation in neutrino oscillations in matter
KTH, Superseded Departments, Physics.ORCID iD: 0000-0002-3525-8349
2001 (English)In: Nuclear Physics B, ISSN 0550-3213, Vol. 608, no 02-jan, 394-422 p.Article in journal (Refereed) Published
Abstract [en]

We consider the interplay of fundamental and matter-induced T violation effects in neutrino oscillations in matter. After discussing the general features of these effects we derive a simple approximate analytic expression for the T-violating probability asymmetry DeltaP(ab)(T) for three-flavour neutrino oscillations in a matter with an arbitrary density profile in terms of the two-flavour neutrino amplitudes. Explicit examples are given for the cases of a two-layer medium and for the adiabatic Emit in the general case. We then discuss implications of the obtained results for long baseline experiments. We show, in particular, that asymmetric matter effects cannot hinder the determination of the fundamental CP- and T-violating phase delta (CP) in the long baseline experiments as far as the error in this determination is larger than 1% at 99% CL. Since there are no T-violating effects in the two-flavour case, and in the limits of vanishing theta (13) or Deltam(21)(2) the three-flavour neutrino oscillations effectively reduce to the two-flavour ones, studying the T-violating asymmetries ApT ab can in principle provide us with a complementary means of measuring theta (13) and Deltam(21)(2).

Place, publisher, year, edition, pages
Elsevier Science B.V. , 2001. Vol. 608, no 02-jan, 394-422 p.
Keyword [en]
neutrino oscillations, matter effects, T violation, base-line experiments, quark mass matrices, CP-violation, 3-neutrino oscillations, earths mantle, resonance, solar, models
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-20875DOI: 10.1016/S0550-3213(01)00261-9ISI: 000170480500015OAI: diva2:339572
QC 20100525Available from: 2011-06-20 Created: 2010-08-10 Last updated: 2011-06-20Bibliographically approved

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