Artículos de revistas
Cp Violation Versus The Matter Effect In Long-baseline Neutrino Oscillation Experiments
Registro en:
Physical Review D. , v. 57, n. 7, p. 4397 - 4402, 1998.
5562821
2-s2.0-33750145340
Autor
Minakata H.
Nunokawa H.
Institución
Resumen
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 a genuine effect due to the CP-violating phase and a fake one due to the Earth matter effect. To this goal, we develop a formalism based on the adiabatic approximation and perturbative treatment of the matter effect which allows us to obtain approximate analytic expressions of the oscillation probabilities. We present an order-of-magnitude estimation and a detailed numerical computation of the absolute and the relative magnitudes of the CP violations under the mass hierarchy suggested by the atmospheric neutrino anomaly and the cosmological dark matter. We find that the genuine CP-violating effect is at most ∼ 1%, and the matter effect dominates over the intrinsic CP violation only in a region of parameters where the oscillation probability of μ→νe is large. © 1998 The American Physical Society. 57 7 4397 4402 Cleveland, B.T., Proceedings of the 16th International Conference on Neutrino Physics and Astrophysics, , Neutrino 94, Eilat, Israel, edited by A. Dar et al (1995) Nucl. Phys. B (Proc. Suppl.), 38, p. 47 Suzuki, Y., (1995) Nucl. Phys. B (Proc. Suppl.), 38, p. 54 Anselmann, P., (1992) Phys. Lett. B, 285, p. 376 (1993) Phys. Lett. B, 314, p. 445 (1994) Phys. Lett. B, 327, p. 377 (1995) Phys. Lett. B, 342, p. 440 Abdurashitov, J.N., Neutrinos, 94, p. 60 Hirata, K.S., (1988) Phys. Lett. B, 205, p. 416 (1992) Phys. Lett. B, 280, p. 146 Fukuda, Y., (1994) Phys. Lett. B, 335, p. 237 Becker-Szendy, R., (1992) Phys. Rev. D, 46, p. 3720 Allison, W.W.M., (1997) Phys. Lett. B, 391, p. 491 Cabbibo, N., (1963) Phys. Rev. Lett., 10, p. 531 Kobayashi, M., Maskawa, T., (1973) Prog. Theor. Phys., 49, p. 652 Fukugita, M., Yanagida, T., (1986) Phys. Lett. B, 174, p. 45 Cabbibo, N., (1978) Phys. Lett., 72 B, p. 333 Barger, V., Wisnant, K., Phillips, R.J.N., (1980) Phys. Rev. Lett., 45, p. 2084 Pakvasa, S., (1981) AIP Conf. Proc. 68, 2, p. 1164. , High Energy Physics, edited by L. Durand and L. G. Pondrom, AIP, New York Bilenky, S.M., Hosek, J., Petcov, S.T., (1980) Phys. Lett., 94 B, p. 495 Jarlskog, C., (1985) Phys. Rev. Lett., 55, p. 1039 Nishikawa, K., (1995) Proposal for A Long Baseline Neutrino Oscillation Experiment Using KEK-PS and SuperKamiokande (1996) MINOS Experiment R&D Plan: FY 1996-1998 (1993) ICARUS II, A Second-Generation Proton Decay Experiment and Neutrino Observatory at the Gran Sasso Laboratory Tanimoto, M., (1997) Phys. Rev. D, 55, p. 322 (1997) Prog. Theor. Phys., 97, p. 901 Arafune, J., Sato, J., (1997) Phys. Rev. D, 55, p. 1653 Wolfenstein, L., (1978) Phys. Rev. D, 17, p. 2369 Kuo, T.K., Pantaleone, J., (1987) Phys. Lett. B, 198, p. 406 Krastev, P.I., Petcov, S.T., (1988) Phys. Lett. B, 205, p. 84 Aglietta, M., (1989) Europhys. Lett., 8, p. 611 Daum, K., (1995) Z. Phys. C, 66, p. 417 Holtzman, J.A., (1989) Astrophys. J., Suppl. Ser., 71, p. 1 Holtzman, J.A., Primack, J.R., (1993) Astrophys. J., 405, p. 428 Primack, J.P., Holtzman, J., Klypin, A., Caldwell, D.O., (1995) Phys. Rev. Lett., 74, p. 2160 Babu, K.S., Schaefer, R.K., Shafi, Q., (1996) Phys. Rev. D, 53, p. 606 D. Pogosyan and A. Starobinsky, astro-ph/9502019Minakata, H., (1995) Phys. Rev. D, 52, p. 6630 (1995) Phys. Lett. B, 356, p. 61 Bilenky, S.M., Bottino, A., Giunti, C., Kim, C.W., (1995) Phys. Lett. B, 356, p. 273 Fogli, G.L., Lisi, E., Scioscia, G., (1995) Phys. Rev. D, 52, p. 5334 Athanassopoulos, C., (1996) Phys. Rev. Lett., 77, p. 3082 (1996) Phys. Rev. C, 54, p. 2685 Hill, J.E., (1995) Phys. Rev. Lett., 75, p. 2654 Acker, A., Pakvasa, S., (1997) Phys. Lett. B, 397, p. 209 Ayres, D., (1996) 4th KEK Topical Conference on Flavor Physics, , Tsukuba, Japan White, M., Scott, D., (1966) Comments. Astrophys., 18, p. 289 Fogli et al. [19](1979) Proceedings of the Workshop on Unified Theory and Baryon Number on the Universe, p. 95. , Tsukuba, Ibaraki, Japan, 1979, edited by O. Sawada and A. Sugamoto, KEK Report No. 79-18 Gell-Mann, M., Ramond, P., Slansky, R., (1979) Proceedings of the Workshop, p. 315. , Supergravity, Stony Brook, New York, 1979, edited by P. van Nieuwenhuizen and D. Freedman North-Holland, Amsterdam Stacey, F.D., (1977) Physics of the Earth, 2nd Ed., , Wiley, New York Qian, Y.-Z., (1993) Phys. Rev. Lett., 71, p. 1965 Qian, Y.-Z., Fuller, G.M., (1995) Phys. Rev. D, 52, p. 656 Zaglauer, H.W., Schwarzer, K.H., (1988) Z. Phys. C, 40, p. 273 Minakata, H., Nunokawa, H., Phys. Lett. B, , to be published, hep-ph/9706281 Arafune, J., Koike, M., Sato, J., (1997) Phys. Rev. D, 56, p. 3093 Totsuka, Y., (1997) International Symposium on Lepton-Photon Interactions at High Energies, , Humburg, Germany