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Wolfenstein-like Parametrization of the Neutrino Mixing Matrix | | Zhi-zhong Xing
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29 Nov 2002 | | Journal: | J.Phys. G29 (2003) 2227-2234 | | Subject: | hep-ph | | Abstract: | We show that the $3 imes 3$ lepton flavor mixing matrix $V$ can be expanded in powers of a Wolfenstein-like parameter $Lambda equiv |V_{mu 3}| sim 1/sqrt{2}$, which measures the strength of flavor conversion in atmospheric neutrino oscillations. The term of ${cal O}(Lambda^2)$ is associated with the large mixing angle in solar neutrino oscillations. The Dirac phase of CP violation enters at or below ${cal O}(Lambda^8)$, and the Majorana phases of CP violation are not subject to the $Lambda$-expansion. Terrestrial matter effects on this new parametrization in realistic long-baseline neutrino oscillation experiments are briefly discussed. Some comments are also given on the possible relation between $Lambda$ and a relatively weak hierarchy of neutrino masses. | | Source: | arXiv, hep-ph/0211465 | | Services: | Forum | Review | PDF | Favorites | |
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