What fraction of boron-8 solar neutrinos arrive at the earth as a nu(2) mass eigenstate? [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 23 pages : digital, PDF file
Additional Creators:: Fermi National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

We calculate the fraction of B⁸ solar neutrinos that arrive at the Earth as a nu₂ mass eigenstate as a function of the neutrino energy. Weighting this fraction with the B⁸ neutrino energy spectrum and the energy dependence of the cross section for the charged current interaction on deuteron with a threshold on the kinetic energy of the recoil electrons of 5.5 MeV, we find that the integrated weighted fraction of nu₂'s to be 91 ± 2 % at the 95% CL. This energy weighting procedure corresponds to the charged current response of the Sudbury Neutrino Observatory (SNO). We have used SNO's current best fit values for the solar mass squared difference and the mixing angle, obtained by combining the data from all solar neutrino experiments and the reactor data from KamLAND. The uncertainty on the nu₂ fraction comes primarily from the uncertainty on the solar delta m² rather than from the uncertainty on the solar mixing angle or the Standard Solar Model. Similar results for the Super-Kamiokande experiment are also given. We extend this analysis to three neutrinos and discuss how to extract the modulus of the Maki-Nakagawa-Sakata mixing matrix element U{sub e2} as well as place a lower bound on the electron number density in the solar B⁸ neutrino production region.

Report Numbers:

E 1.99:fermilab-pub-05-049-t
fermilab-pub-05-049-t

Subject(s):

Other Subject(s):

Note:

Published through SciTech Connect.
01/01/2006.
"fermilab-pub-05-049-t"
"arXiv eprint number hep-ph/0601198"
Phys.Rev.D74:013006,2006 FT
Parke, Stephen J.; Nunokawa, Hiroshi; Zukanovich Funchal, Renata.

Funding Information:

AC02-76CH03000

View MARC record | catkey: 13824466