Atmospheric, long baseline, and reactor neutrino data constraints on $θ_{13}$

Details Atmospheric, long baseline, and reactor neutrino data constraints on $θ_{13}$ Atmospheric, long baseline, and reactor neutrino data constraints on $θ_{13}$

2008-05-19

arxiv.org/abs/0805.2924v4

Phys.Rev.Lett.103:061804,2009

Physics

Nuclear Physics

Nuclear Theory

4 pages, 5 figures, typos corrected, manuscript shortened

Scientific paper

10.1103/PhysRevLett.103.061804

A new atmospheric neutrino oscillation tool which utilizes full three neutrino oscillation probabilities and a full three neutrino treatment of the MSW effect is combined with a standard analysis of the K2K, MINOS, and CHOOZ data to examine the bounds on $\theta_{13}$ implied by existing data, including the recent, more finely binned, Super-K atmospheric data. In the region $L/E_\nu\gtrsim 10^4$ km/GeV, we have previously found that the sub-dominant expansion does not converge and that terms linear in $\theta_{13}$ can be significant. The current analysis confirms this and leads to the conclusion that $\theta_{13}$ is bounded from above by the atmospheric data while CHOOZ provides the lower bound. We trace the origin of this result to fully contained data in the previously mentioned very long baseline region, to a combination of a quadratic in $\theta_{13}$ term in ${\mathcal P}_{ee}$ and a linear term in ${\mathcal P}_{e\mu}$ and their contribution to $R_e$, a broad MSW resonance for the solar mass-squared difference at 180 MeV, and an increase in $\theta_{12}$ due to this resonant matter effect which alters the sign of the linear in $\theta_{13}$ term. Assuming CP is conserved in the lepton sector, we find $\theta_{13}=-0.07^{+0.18}_{-0.11}$, the asymmetry being a reflection of the importance of the linear in $\theta_{13}$ terms.

Affiliated with

Also associated with

No associations

Rating

Atmospheric, long baseline, and reactor neutrino data constraints on $θ_{13}$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Atmospheric, long baseline, and reactor neutrino data constraints on $θ_{13}$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atmospheric, long baseline, and reactor neutrino data constraints on $θ_{13}$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-648502