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Probing CPT violation with atmospheric neutrinos

Skadhauge, Solveig LU (2002) In Nuclear Physics, Section B 639(1-2). p.281-289
Abstract
We investigate the recently suggested scheme of independent mass matrices for neutrinos and antineutrinos. Such a CPT violating scheme is able to account for all neutrino data with the three known flavors. For atmospheric neutrinos this means that it is possible to have different mass squared differences driving the oscillation for neutrinos and antineutrinos. We analyze the atmospheric and K2K data within the simplest scheme of two neutrino oscillation, neglecting electron neutrino oscillation. We find that the preferred region is close to the CPT conserving mass spectra. However the spectra with the antineutrino mass squared difference about or larger than 0.1 eV(2) and the neutrino mass squared difference about 2 x 10(-3) eV(2) is not... (More)
We investigate the recently suggested scheme of independent mass matrices for neutrinos and antineutrinos. Such a CPT violating scheme is able to account for all neutrino data with the three known flavors. For atmospheric neutrinos this means that it is possible to have different mass squared differences driving the oscillation for neutrinos and antineutrinos. We analyze the atmospheric and K2K data within the simplest scheme of two neutrino oscillation, neglecting electron neutrino oscillation. We find that the preferred region is close to the CPT conserving mass spectra. However the spectra with the antineutrino mass squared difference about or larger than 0.1 eV(2) and the neutrino mass squared difference about 2 x 10(-3) eV(2) is not significantly disfavored. In this parameter region the atmospheric data are independent of the antineutrino mass squared difference. Therefore only rather weak bounds can be put on CPT violation effects contributing to different masses for the neutrinos and antineutrinos. (C) 2002 Elsevier Science B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
neutrino physics, atmospheric neutrinos, CPT violation
in
Nuclear Physics, Section B
volume
639
issue
1-2
pages
281 - 289
publisher
Elsevier
external identifiers
  • wos:000178062900010
  • scopus:0037048007
ISSN
0550-3213
DOI
10.1016/S0550-3213(02)00545-X
language
English
LU publication?
yes
id
a33c0ef3-854a-4c8d-a5bb-d45c7e54e35d (old id 328213)
date added to LUP
2007-11-07 18:31:02
date last changed
2017-01-01 07:16:29
@article{a33c0ef3-854a-4c8d-a5bb-d45c7e54e35d,
  abstract     = {We investigate the recently suggested scheme of independent mass matrices for neutrinos and antineutrinos. Such a CPT violating scheme is able to account for all neutrino data with the three known flavors. For atmospheric neutrinos this means that it is possible to have different mass squared differences driving the oscillation for neutrinos and antineutrinos. We analyze the atmospheric and K2K data within the simplest scheme of two neutrino oscillation, neglecting electron neutrino oscillation. We find that the preferred region is close to the CPT conserving mass spectra. However the spectra with the antineutrino mass squared difference about or larger than 0.1 eV(2) and the neutrino mass squared difference about 2 x 10(-3) eV(2) is not significantly disfavored. In this parameter region the atmospheric data are independent of the antineutrino mass squared difference. Therefore only rather weak bounds can be put on CPT violation effects contributing to different masses for the neutrinos and antineutrinos. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Skadhauge, Solveig},
  issn         = {0550-3213},
  keyword      = {neutrino physics,atmospheric neutrinos,CPT violation},
  language     = {eng},
  number       = {1-2},
  pages        = {281--289},
  publisher    = {Elsevier},
  series       = {Nuclear Physics, Section B},
  title        = {Probing CPT violation with atmospheric neutrinos},
  url          = {http://dx.doi.org/10.1016/S0550-3213(02)00545-X},
  volume       = {639},
  year         = {2002},
}