Unstable massive tau-neutrinos and primordial nucleosynthesis

被引：23

作者：

Dolgov, AD

Hansen, SH

Pastor, S

Semikoz, DV

机构：

[1] Teoret Astrofys Ctr, DK-2100 Copenhagen, Denmark

[2] Univ Valencia, Dept Fis Teor, CSIC, Inst Fis Corpuscular, E-46100 Valencia, Spain

[3] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[4] ITEP, Moscow 113259, Russia

来源：

NUCLEAR PHYSICS B | 1999年 / 548卷 / 1-3期

关键词：

massive decaying neutrino; nucleosynthesis;

D O I：

10.1016/S0550-3213(99)00127-3

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The impact of unstable Majorana nu(tau) on primordial nucleosynthesis is considered. The mass and lifetime of nu(tau), are taken in the intervals 0.1-20 MeV and 0.001-400 s respectively. The studied decay modes are nu(tau) --> nu(mu) + phi and nu(tau) --> nu e(+) phi, where phi is a massless (or light) scalar. Integro-differential kinetic equations are solved numerically without any simplifying assumptions. Our results deviate rather strongly from earlier calculations. Depending on mass, lifetime, and decay channels of the nu(tau), the number of effective neutrino species (found from He-4), in addition to the 3 standard ones, varies from -2 to +2.5. The abundances of H-2 and Li-7 are also calculated. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：385 / 407

页数：23

共 49 条

[1] RELAXING NUCLEOSYNTHESIS BOUNDS ON STERILE NEUTRINOS [J].

BABU, KS ;

ROTHSTEIN, IZ .

PHYSICS LETTERS B, 1992, 275 (1-2) :112-118

[2] An upper limit on the τ neutrino mass from three- and five-prong tau decays [J].

Barate, R ;

Buskulic, D ;

Decamp, D ;

Ghez, P ;

Goy, C ;

Lees, JP ;

Lucotte, A ;

Minard, MN ;

Nief, JY ;

Pietrzyk, B ;

Casado, MP ;

Chmeissani, M ;

Comas, P ;

Crespo, JM ;

Delfino, M ;

Fernandez, E ;

Fernandez-Bosman, M ;

Garrido, L ;

Juste, A ;

Martinez, M ;

Merino, G ;

Miquel, R ;

Mir, LM ;

Padilla, C ;

Park, IC ;

Pascual, A ;

Perlas, JA ;

Riu, I ;

Sanchez, F ;

Colaleo, A ;

Creanza, D ;

de Palma, M ;

Gelao, G ;

Iaselli, G ;

Maggi, G ;

Maggi, M ;

Marinelli, N ;

Nuzzo, S ;

Ranieri, A ;

Raso, G ;

Ruggieri, F ;

Selvaggi, G ;

Silvestris, L ;

Tempesta, P ;

Tricomi, A ;

Zito, G ;

Huang, X ;

Lin, J ;

Ouyang, Q ;

Wang, T .

EUROPEAN PHYSICAL JOURNAL C, 1998, 2 (03) :395-406

[3] NEUTRINO OSCILLATIONS IN THE EARLY UNIVERSE [J].

BARBIERI, R ;

DOLGOV, A .

NUCLEAR PHYSICS B, 1991, 349 (03) :743-753

[4] Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model [J].

Bell, NF ;

Foot, R ;

Volkas, RR .

PHYSICAL REVIEW D, 1998, 58 (10)

[5]

BELL NF, HEPPH9809363

[6] Review of Particle Physics [J].

The European Physical Journal C - Particles and Fields, 1998, 3 (1-4) :1-783

[7]

CHIKASHIGE Y, 1980, PHYS REV LETT, V45, P1926, DOI 10.1103/PhysRevLett.45.1926

[8] UPPER LIMIT ON NEUTRINO REST MASS [J].

COWSIK, R ;

MCCLELLAND, J .

PHYSICAL REVIEW LETTERS, 1972, 29 (10) :669-+

[9] PRIMORDIAL NUCLEOSYNTHESIS WITH A DECAYING TAU-NEUTRINO [J].

DODELSON, S ;

GYUK, G ;

TURNER, MS .

PHYSICAL REVIEW D, 1994, 49 (10) :5068-5079

[10] Primordial nucleosynthesis, majorons and heavy tau neutrinos [J].

Dolgov, AD ;

Pastor, S ;

Romao, JC ;

Valle, JWF .

NUCLEAR PHYSICS B, 1997, 496 (1-2) :24-40

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