Neutrino mass matrix:: Inverted hierarchy and CP violation -: art. no. 013007

被引:64
作者
Frigerio, M
Smirnov, AY
机构
[1] Ist Nazl Fis Nucl, Sect Trieste, I-34014 Trieste, Italy
[2] SISSA, I-34014 Trieste, Italy
[3] Andus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy
[4] Russian Acad Sci, Inst Nucl Res, Moscow, Russia
关键词
D O I
10.1103/PhysRevD.67.013007
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We reconstruct the neutrino mass matrix in the flavor basis, in the case of an inverted mass hierarchy (ordering), using all available experimental data on neutrino masses and oscillations. We analyze the dependence of the matrix elements m(alphabeta) on the CP violating Dirac delta and Majorana rho and sigma phases, for different values of the absolute mass scale. We find that the present data admit various structures of the mass matrix: (i) hierarchical structures with a set of small (zero) elements; (ii) structures with equalities among various groups of elements: e-row and/or mutau-block elements, diagonal and/or off-diagonal elements; (iii) "democratic" structure. We find the values of phases for which these structures are realized. The mass matrix elements can anticorrelate with flavor: inverted partial or complete flavor alignment is possible. For various structures of the mass matrix we identify the possible underlying symmetry. We find that the mass matrix can be reconstructed completely only in particular cases, provided that the absolute scale of the mass is measured. Generally, the freedom related to the Majorana phase sigma will not be removed, thus admitting various types of mass matrix.
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页数:16
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共 54 条
[11]  
Bahcall JN, 2002, J HIGH ENERGY PHYS
[12]   Implications of the first neutral current data from SNO for solar neutrino oscillation [J].
Bandyopadhyay, A ;
Choubey, S ;
Goswami, S ;
Roy, DP .
PHYSICS LETTERS B, 2002, 540 (1-2) :14-19
[13]  
Barbieri R, 1998, J HIGH ENERGY PHYS
[14]   Imprint of SNO neutral current data on the solar neutrino problem [J].
Barger, V ;
Marfatia, D ;
Whisnant, K ;
Wood, BP .
PHYSICS LETTERS B, 2002, 537 (3-4) :179-186
[15]   Supernova 1987A did not test the neutrino mass hierarchy [J].
Barger, V ;
Marfatia, D ;
Wood, BP .
PHYSICS LETTERS B, 2002, 532 (1-2) :19-28
[16]   A general classification of three-neutrino models and Ue3 [J].
Barr, SM ;
Dorsner, I .
NUCLEAR PHYSICS B, 2000, 585 (1-2) :79-104
[17]  
BURAS R, ASTROPH0205006
[18]   AN INVERTED NEUTRINO MASS HIERARCHY FOR HOT DARK-MATTER AND THE SOLAR-NEUTRINO DEFICIT [J].
CALDWELL, DO ;
MOHAPATRA, RN .
PHYSICS LETTERS B, 1995, 354 (3-4) :371-375
[19]   Solar neutrinos: Global analysis with day and night spectra from SNO [J].
de Holanda, PC ;
Smirnov, AY .
PHYSICAL REVIEW D, 2002, 66 (11)
[20]   New upper limit on the total neutrino mass from the 2 Degree Field Galaxy Redshift Survey [J].
Elgaroy, O ;
Lahav, O ;
Percival, WJ ;
Peacock, JA ;
Madgwick, DS ;
Bridle, SL ;
Baugh, CM ;
Baldry, IK ;
Bland-Hawthorn, J ;
Bridges, T ;
Cannon, R ;
Cole, S ;
Colless, M ;
Collins, C ;
Couch, W ;
Dalton, G ;
De Propris, R ;
Driver, SP ;
Efstathiou, GP ;
Ellis, RS ;
Frenk, CS ;
Glazebrook, K ;
Jackson, C ;
Lewis, I ;
Lumsden, S ;
Maddox, S ;
Norberg, P ;
Peterson, BA ;
Sutherland, W ;
Taylor, K .
PHYSICAL REVIEW LETTERS, 2002, 89 (06) :061301/1-061301/4