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We have studied CP violation originated by the phase of the neutrino mixing matrix in the long baseline neutrino oscillation experiments. The direct measurements of CP violation is the difference of the transition probabilities between…

High Energy Physics - Phenomenology · Physics 2014-11-17 Morimitsu Tanimoto

We show simple methods how to separate pure CP violating effect from matter effect in long baseline neutrino oscillation experiments with three generations of neutrinos. We give compact formulae for neutrino oscillation probabilities…

High Energy Physics - Phenomenology · Physics 2014-11-17 Jiro Arafune , Masafumi Koike , Joe Sato

We investigate CP-violation effect in the long-baseline neutrino oscillation in the four-neutrino model with mass scheme of the two nearly degenerate pairs separated with the order of 1 eV, by using the data from the solar neutrino deficit,…

High Energy Physics - Phenomenology · Physics 2009-10-31 Toshihiko Hattori , Tsutom Hasuike , Seiichi Wakaizumi

In this talk we discuss the possibility to measure CP violation in neutrino oscillation experiments using the neutrino beam with energy which is lower (E_\nu \gsim 100 MeV) than the one usually considered (typically > 1 GeV) in accelerator…

High Energy Physics - Phenomenology · Physics 2009-10-31 Hisakazu Minakata , Hiroshi Nunokawa

We examine how large CP- and T-violation effects are allowed in long baseline neutrino experiments with three generations of neutrinos, considering both the solar neutrino deficit and the atmospheric neutrino anomaly. We considerd two…

High Energy Physics - Phenomenology · Physics 2008-02-03 Masafumi Koike , Joe Sato

The CP violation effects in long baseline neutrino oscillations are studied in the framework of a four-neutrino model (three active neutrinos and one sterile neutrino). It is assumed that neutrino masses are devided into two nearly…

High Energy Physics - Phenomenology · Physics 2008-11-26 Anna Kalliomäki , Jukka Maalampi , Morimitsu Tanimoto

We study in a quantitative way CP-violating effects in neutrino oscillation experiments in the light of current and future data. Different scenarios with three and four neutrinos are worked out in detail including matter effects in long…

High Energy Physics - Phenomenology · Physics 2009-10-31 K. Dick , M. Freund , M. Lindner , A. Romanino

We investigate the CP violation effect and the matter effect in the long-baseline neutrino oscillations in the four-neutrino model with mass scheme of the two pairs of two close masses separated by a gap of the order of 1 eV by using the…

High Energy Physics - Phenomenology · Physics 2014-11-17 T. Hattori , T. Hasuike , S. Wakaizumi

We consider possibilities of observing CP-violation effects in neutrino oscillation experiments with low energy ($\sim$ several hundreds MeV).

High Energy Physics - Phenomenology · Physics 2011-02-11 J. Sato

We examine how large violation of CP and T is allowed in long base line neutrino experiments. When we attribute only the atmospheric neutrino anomaly to neutrino oscillation we may have large CP violation effect. When we attribute both the…

High Energy Physics - Phenomenology · Physics 2009-10-28 Jiro Arafune , Joe Sato

We define a difference $D_{\rm CP}$ of the neutrino oscillation probability differences with matter effect for the CP-conjugate channels, divided by neutrino beam energy, taken between the two baselines $L = L_1$ and $L =L_2$ with $L_1/E_1…

High Energy Physics - Phenomenology · Physics 2007-05-23 Chise Sakaguchi , Toshihiko Hattori , Seiichi Wakaizumi

The potential for studying CP violation in neutrino oscillations using conventional neutrino and anti-neutrino beams is examined.

High Energy Physics - Phenomenology · Physics 2007-05-23 William J. Marciano

We estimate CP violation for several experimental facilities studying neutrino oscillations. We also estimate the probability of $\nu_{\mu}$ to $\nu_{e}$ conversion, using values of the parameter $\theta_{13}$ within the known limits, in…

High Energy Physics - Phenomenology · Physics 2011-12-01 Leonard S. Kisslinger , Ernest M. Henley , Mikkel B. Johnson

We propose a new method for measuring CP violation in neutrino oscillation experiments. The idea is to isolate the term due to the CP-violating phase out of the oscillation probability by taking difference between yields of two (or three)…

High Energy Physics - Phenomenology · Physics 2011-02-24 Hisakazu Minakata , Hiroshi Nunokawa

The next generation of long baseline neutrino oscillation experiments will aim at determining the unknown mixing angle $\theta_{13}$, the type of neutrino mass hierarchy and CP-violation. We discuss the separation of these properties by…

High Energy Physics - Phenomenology · Physics 2009-05-19 Jose Bernabeu , Catalina Espinoza

We investigate, within the framework of three generations of neutrinos, the effects of CP violation in long-baseline neutrino oscillation experiments. We aim at illuminating the global feature of the interplay between genuine effect due to…

High Energy Physics - Phenomenology · Physics 2009-10-30 Hisakazu Minakata , Hiroshi Nunokawa

After reviewing the general framework to study EPR-like neutrino oscillations, we derive expressions for the oscillation probabilities and a direct measure of CP violation. We compare the possibility of studying CP violation in this case…

High Energy Physics - Phenomenology · Physics 2009-10-30 M K Samal

We discuss possibilities to investigate the effects of CP (and T) violation in the lepton sector in neutrino oscillation experiments. We consider the effects of CP violation in the framework of two schemes of mixing of four massive…

High Energy Physics - Phenomenology · Physics 2014-11-17 S. M. Bilenky , C. Giunti , W. Grimus

We examine the prospects of making a joint analysis of neutrino oscillation at two baselines with neutrino superbeams. Assuming narrow band superbeams and a 100 kt water Cerenkov calorimeter, we calculate the event rates and sensitivities…

High Energy Physics - Phenomenology · Physics 2008-11-26 Y. F. Wang , K. Whisnant , Z. Xiong , Jin Min Yang , Bing-Lin Young

Stimulated by the idea of PRISM, a very high intensity muon ring with rather low energy, we consider possibilities of observing CP-violation effects in neutrino oscillation experiments. More than 10% of CP-violation effect can be seen…

High Energy Physics - Phenomenology · Physics 2014-11-17 Masafumi Koike , Joe Sato
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