BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS
A result from MINOS seemed to indicate that the mass splitting and mixing angle of anti-neutrinos is different from that of neutrinos, suggesting a charge-parity-time (CPT) violation in the lepton sector. However, more recent MINOS data reduced the νμ–¯νμ differences leading to a narrow discrepancy...
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Online Access: | http://hdl.handle.net/11573/484935 https://doi.org/10.1088/0004-637x/758/1/3 |
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ftunivromairis:oai:iris.uniroma1.it:11573/484935 2024-02-27T08:45:33+00:00 BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS FARGION, Daniele Daniele D'Armiento Paolo Desiati Paolo Paggi1 Fargion, Daniele Daniele, D'Armiento Paolo, Desiati Paolo, Paggi1 2012 STAMPA http://hdl.handle.net/11573/484935 https://doi.org/10.1088/0004-637x/758/1/3 eng eng The American Astronomical Society info:eu-repo/semantics/altIdentifier/wos/WOS:000309520500003 volume:758 issue:1 firstpage:3 lastpage:15 numberofpages:15 journal:THE ASTROPHYSICAL JOURNAL http://hdl.handle.net/11573/484935 doi:10.1088/0004-637x/758/1/3 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84866636211 abundance cosmic rays – neutrinos – nuclear reaction nucleosynthesis info:eu-repo/semantics/article 2012 ftunivromairis https://doi.org/10.1088/0004-637x/758/1/3 2024-01-31T17:49:14Z A result from MINOS seemed to indicate that the mass splitting and mixing angle of anti-neutrinos is different from that of neutrinos, suggesting a charge-parity-time (CPT) violation in the lepton sector. However, more recent MINOS data reduced the νμ–¯νμ differences leading to a narrow discrepancy nearly compatible with no CPT violation. However, the last few years of OPERA activity on the appearance of a tau lepton (one unique event) still has not been probed and more tools may be required to disentangle a list of parameters (μ–τ flavor mixing, tau appearance, any eventual CPT violation, θ13 angle value, and any hierarchy neutrino mass). Atmospheric anisotropy in muon neutrino spectra in the DeepCore, at ten to tens of GeV (unpublished), can hardly reveal asymmetry in the eventual νμ–¯νμ oscillation parameters. Here we considered how the longest baseline neutrino oscillation available, crossing most of Earth’s diameter, may improve the measurement and at best disentangle any hypothetical CPT violation occurring between the earliest (2010) and the present (2012) MINOS bounds (with 6σ a year), while testing τ and even the appearance of ¯ τ at the highest rate. The νμ and ¯νμ disappearance correlated with the tau appearance is considered for those events at the largest distances. We thus propose a beam of νμ and ¯νμ crossing through the Earth, within an OPERA-like experiment from CERN (or Fermilab), in the direction of the IceCube–DeepCore ν detector at the South Pole. The ideal energy lies at 21 GeV to test the disappearance or (for any tiny CPT violation) the partial ¯νμ appearance. Such a tuned detection experiment may lead to a strong signature of τ or ¯ τ generation even within its neutral current noise background events: nearly one ¯ τ or two τ a day. The tau appearance signal is above (or within) 10σ a year, even for a 1% OPERA-like experiment. Peculiar configurations for θ13 and the hierarchy neutrino mass test may also be better addressed by a DeepCore–PINGU array detector beaming νμ and observing νe at ... Article in Journal/Newspaper South pole Sapienza Università di Roma: CINECA IRIS South Pole Pingu ENVELOPE(-52.017,-52.017,67.067,67.067) The Astrophysical Journal 758 1 3 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
abundance cosmic rays – neutrinos – nuclear reaction nucleosynthesis |
spellingShingle |
abundance cosmic rays – neutrinos – nuclear reaction nucleosynthesis FARGION, Daniele Daniele D'Armiento Paolo Desiati Paolo Paggi1 BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS |
topic_facet |
abundance cosmic rays – neutrinos – nuclear reaction nucleosynthesis |
description |
A result from MINOS seemed to indicate that the mass splitting and mixing angle of anti-neutrinos is different from that of neutrinos, suggesting a charge-parity-time (CPT) violation in the lepton sector. However, more recent MINOS data reduced the νμ–¯νμ differences leading to a narrow discrepancy nearly compatible with no CPT violation. However, the last few years of OPERA activity on the appearance of a tau lepton (one unique event) still has not been probed and more tools may be required to disentangle a list of parameters (μ–τ flavor mixing, tau appearance, any eventual CPT violation, θ13 angle value, and any hierarchy neutrino mass). Atmospheric anisotropy in muon neutrino spectra in the DeepCore, at ten to tens of GeV (unpublished), can hardly reveal asymmetry in the eventual νμ–¯νμ oscillation parameters. Here we considered how the longest baseline neutrino oscillation available, crossing most of Earth’s diameter, may improve the measurement and at best disentangle any hypothetical CPT violation occurring between the earliest (2010) and the present (2012) MINOS bounds (with 6σ a year), while testing τ and even the appearance of ¯ τ at the highest rate. The νμ and ¯νμ disappearance correlated with the tau appearance is considered for those events at the largest distances. We thus propose a beam of νμ and ¯νμ crossing through the Earth, within an OPERA-like experiment from CERN (or Fermilab), in the direction of the IceCube–DeepCore ν detector at the South Pole. The ideal energy lies at 21 GeV to test the disappearance or (for any tiny CPT violation) the partial ¯νμ appearance. Such a tuned detection experiment may lead to a strong signature of τ or ¯ τ generation even within its neutral current noise background events: nearly one ¯ τ or two τ a day. The tau appearance signal is above (or within) 10σ a year, even for a 1% OPERA-like experiment. Peculiar configurations for θ13 and the hierarchy neutrino mass test may also be better addressed by a DeepCore–PINGU array detector beaming νμ and observing νe at ... |
author2 |
Fargion, Daniele Daniele, D'Armiento Paolo, Desiati Paolo, Paggi1 |
format |
Article in Journal/Newspaper |
author |
FARGION, Daniele Daniele D'Armiento Paolo Desiati Paolo Paggi1 |
author_facet |
FARGION, Daniele Daniele D'Armiento Paolo Desiati Paolo Paggi1 |
author_sort |
FARGION, Daniele |
title |
BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS |
title_short |
BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS |
title_full |
BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS |
title_fullStr |
BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS |
title_full_unstemmed |
BEAMING NEUTRINOS AND ANTI-NEUTRINOS ACROSS THE EARTH TO DISENTANGLE NEUTRINO MIXING PARAMETERS |
title_sort |
beaming neutrinos and anti-neutrinos across the earth to disentangle neutrino mixing parameters |
publisher |
The American Astronomical Society |
publishDate |
2012 |
url |
http://hdl.handle.net/11573/484935 https://doi.org/10.1088/0004-637x/758/1/3 |
long_lat |
ENVELOPE(-52.017,-52.017,67.067,67.067) |
geographic |
South Pole Pingu |
geographic_facet |
South Pole Pingu |
genre |
South pole |
genre_facet |
South pole |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000309520500003 volume:758 issue:1 firstpage:3 lastpage:15 numberofpages:15 journal:THE ASTROPHYSICAL JOURNAL http://hdl.handle.net/11573/484935 doi:10.1088/0004-637x/758/1/3 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84866636211 |
op_doi |
https://doi.org/10.1088/0004-637x/758/1/3 |
container_title |
The Astrophysical Journal |
container_volume |
758 |
container_issue |
1 |
container_start_page |
3 |
_version_ |
1792054804185350144 |