| dc.creator |
González García, M.ª Concepción |
|
| dc.creator |
Maltoni, Michele |
|
| dc.date |
2008-07-02T14:34:11Z |
|
| dc.date |
2008-07-02T14:34:11Z |
|
| dc.date |
2008-04-15 |
|
| dc.date.accessioned |
2017-01-31T02:20:39Z |
|
| dc.date.available |
2017-01-31T02:20:39Z |
|
| dc.identifier |
arXiv:0802.3699v2 [hep-ph] |
|
| dc.identifier |
http://hdl.handle.net/10261/5544 |
|
| dc.identifier.uri |
http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5544 |
|
| dc.description |
PACS: 14.60.Pq, 13.35.Hb, 14.80.Mz.-- LaTeX file using elsart style, 10 pages and 2 figures included.-- Final version. |
|
| dc.description |
We study the interplay of neutrino oscillation and invisible decay in atmospheric and long-baseline neutrinos experiments. We perform a global analysis of the full atmospheric data from Super-Kamiokande together with long-baseline K2K and MINOS in these scenarios. We find that the admixture of v_μ -> v_τ oscillations with parameters Δm_32^2 = 2.6e-3 eV^2 and Θ_23 ~ 34º plus decay of the heavy neutrino, v_3, with lifetime of the order τ_3/m_3 ~ 2.6e-12 s/eV provides a reasonable fit to atmospheric neutrinos, although this solution becomes more disfavored (dropping to the 99% CL) once long-baseline data are included. Other than this local minimum, the analysis shows no evidence in favor of a non-vanishing neutrino decay width and an lower bound on the decay lifetime τ_3/m_3 > 9.3e-11 s/eV is set at 99% CL. In the framework of Majoron models, this constraint can be translated into a bound on the Majoron coupling to v_3 and an unmixed very light sterile state, |g_s3| < 8.6e-3 (2.2 eV/m_3). |
|
| dc.description |
This work is supported by National Science Foundation grant PHY-0354776 and by Spanish Grants FPA-2004-00996, FPA2006-01105 and FPA-2007-66665-C02-01. MM is supported by MCI through the Ramón y Cajal program, by the Comunidad Autónoma de Madrid through the HEPHACOS project P-ESP-00346, and by the European Union through the ENTApP network of the ILIAS project RII3-CT-2004-506222. |
|
| dc.description |
Peer reviewed |
|
| dc.format |
204152 bytes |
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| dc.format |
application/pdf |
|
| dc.language |
eng |
|
| dc.relation |
IFT-UAM/CSIC-08-10 |
|
| dc.relation |
YITP-SB-08-03 |
|
| dc.relation |
Preprint |
|
| dc.rights |
openAccess |
|
| dc.subject |
Neutrino oscillations |
|
| dc.subject |
Neutrino decay |
|
| dc.subject |
Majoron models |
|
| dc.title |
Status of Oscillation plus Decay of Atmospheric and Long-Baseline Neutrinos |
|
| dc.type |
Pre-print |
|