Decaying neutrino and a high cosmological baryon density

被引：22

作者：

Hansen, SH

Villante, FL

机构：

[1] Dipartimento Fis, I-44100 Ferrara, Italy

[2] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

来源：

PHYSICS LETTERS B | 2000年 / 486卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(00)00738-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The low second acoustic peak in the recent Boomerang data may indicate a cosmological baryon density which is larger than allowed by standard big bane nucleosynthesis. We show that the decay of the tau-neutrino: nu(tau) --> nu(e) + phi, where nu(e) is the electron neutrino and phi is a scalar, essentially can assure agreement between BBN calculations and light element observations for a large baryon density. (C) 2000 Published by Elsevier Science B.V.

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页码：1 / 5

页数：5

相关论文

共 20 条

[1]

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

[2] A flat Universe from high-resolution maps of the cosmic microwave background radiation [J].

de Bernardis, P ;

Ade, PAR ;

Bock, JJ ;

Bond, JR ;

Borrill, J ;

Boscaleri, A ;

Coble, K ;

Crill, BP ;

De Gasperis, G ;

Farese, PC ;

Ferreira, PG ;

Ganga, K ;

Giacometti, M ;

Hivon, E ;

Hristov, VV ;

Iacoangeli, A ;

Jaffe, AH ;

Lange, AE ;

Martinis, L ;

Masi, S ;

Mason, PV ;

Mauskopf, PD ;

Melchiorri, A ;

Miglio, L ;

Montroy, T ;

Netterfield, CB ;

Pascale, E ;

Piacentini, F ;

Pogosyan, D ;

Prunet, S ;

Rao, S ;

Romeo, G ;

Ruhl, JE ;

Scaramuzzi, F ;

Sforna, D ;

Vittorio, N .

NATURE, 2000, 404 (6781) :955-959

[3] Unstable massive tau-neutrinos and primordial nucleosynthesis [J].

Dolgov, AD ;

Hansen, SH ;

Pastor, S ;

Semikoz, DV .

NUCLEAR PHYSICS B, 1999, 548 (1-3) :385-407

[4] Non-equilibrium corrections to, the spectra of massless neutrinos in the early universe [J].

Dolgov, AD ;

Hansen, SH ;

Semikoz, DV .

NUCLEAR PHYSICS B, 1999, 543 (1-2) :269-274

[5] LEFT-HANDED NEUTRINO MASS SCALE AND SPONTANEOUSLY BROKEN LEPTON NUMBER [J].

GELMINI, GB ;

RONCADELLI, M .

PHYSICS LETTERS B, 1981, 99 (05) :411-415

[6] FAST INVISIBLE NEUTRINO DECAYS [J].

GELMINI, GB ;

VALLE, JWF .

PHYSICS LETTERS B, 1984, 142 (03) :181-187

[7]

HANNESTAD S, ASTROPH0005018

[8] ANISOTROPIES IN THE COSMIC MICROWAVE BACKGROUND - AN ANALYTIC APPROACH [J].

HU, W ;

SUGIYAMA, N .

ASTROPHYSICAL JOURNAL, 1995, 444 (02) :489-506

[9] FAST NEUTRINO DECAY IN THE MINIMAL SEESAW MODEL [J].

JOSHIPURA, AS ;

RINDANI, SD .

PHYSICAL REVIEW D, 1992, 46 (07) :3000-3007

[10] Measuring the cosmological lepton asymmetry through the cosmic microwave background anisotropy [J].

Kinney, WH ;

Riotto, A .

PHYSICAL REVIEW LETTERS, 1999, 83 (17) :3366-3369