Relaxing cosmological neutrino mass bounds with unstable neutrinos

被引：58

作者：

Escudero, Miguel ^{[1
]}

Lopez-Pavon, Jacobo ^{[2
,3
]}

Rius, Nuria ^{[2
,3
]}

Sandner, Stefan ^{[2
,3
]}

机构：

[1] Kings Coll London, Dept Phys, Theoret Particle Phys & Cosmol Grp, London WC2R 2LS, England

[2] Univ Valencia, CSIC, Dept Fis Teor, C Catedrat Jose Beltran 2, E-46980 Paterna, Spain

[3] Univ Valencia, CSIC, IFIC, C Catedrat Jose Beltran 2, E-46980 Paterna, Spain

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 2020卷 / 12期

基金：

欧洲研究理事会; 欧盟地平线“2020”;

关键词：

Beyond Standard Model; Cosmology of Theories beyond the SM; Neutrino Physics; MAGNETIC-MOMENT; DECAY; SYMMETRY; CONSTRAINTS; VIOLATION; MODELS;

D O I：

10.1007/JHEP12(2020)119

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：

At present, cosmological observations set the most stringent bound on the neutrino mass scale. Within the standard cosmological model (Lambda CDM), the Planck collaboration reports Sigma m(v)< 0.12 eV at 95 % CL. This bound, taken at face value, excludes many neutrino mass models. However, unstable neutrinos, with lifetimes shorter than the age of the universe <tau>(nu) less than or similar to t(U), represent a particle physics avenue to relax this constraint. Motivated by this fact, we present a taxonomy of neutrino decay modes, categorizing them in terms of particle content and final decay products. Taking into account the relevant phenomenological bounds, our analysis shows that 2-body decaying neutrinos into BSM particles are a promising option to relax cosmological neutrino mass bounds. We then build a simple extension of the type I seesaw scenario by adding one sterile state nu (4) and a Goldstone boson phi, in which nu (i)-> nu (4)phi decays can loosen the neutrino mass bounds up to Sigma m(v) similar to 1 eV, without spoiling the light neutrino mass generation mechanism. Remarkably, this is possible for a large range of the right-handed neutrino masses, from the electroweak up to the GUT scale. We successfully implement this idea in the context of minimal neutrino mass models based on a U(1)(mu-tau) flavor symmetry, which are otherwise in tension with the current bound on Sigma m(v).

引用

页数：44

共 153 条

[1] Precision constraints on radiative neutrino decay with CMB spectral distortion [J].

Aalberts, Jelle L. ;

Ando, Shin'ichiro ;

Borg, Wouter M. ;

Broeils, Edwin ;

Broeils, Jennypher ;

Broeils, Stephen ;

Kavanagh, Bradley J. ;

Leguijt, Gijs ;

Reemst, Marnix ;

van Arneman, Dylan R. ;

Hoang Vu .

PHYSICAL REVIEW D, 2018, 98 (02)

[2] Production and evolution of perturbations of sterile neutrino dark matter [J].

Abazajian, K .

PHYSICAL REVIEW D, 2006, 73 (06)

[3] Visible decay of astrophysical neutrinos at IceCube [J].

Abdullahi, Asli ;

Denton, Peter B. .

PHYSICAL REVIEW D, 2020, 102 (02)

[4] Constraint on the matter-antimatter symmetry-violating phase in neutrino oscillations [J].

Abe, K. ;

Akutsu, R. ;

Ali, A. ;

Alt, C. ;

Andreopoulos, C. ;

Anthony, L. ;

Antonova, M. ;

Aoki, S. ;

Ariga, A. ;

Ashida, Y. ;

Atkin, E. T. ;

Awataguchi, Y. ;

Ban, S. ;

Barbi, M. ;

Barker, G. J. ;

Barr, G. ;

Barry, C. ;

Batkiewicz-Kwasniak, M. ;

Beloshapkin, A. ;

Bench, F. ;

Berardi, V. ;

Berkman, S. ;

Berns, L. ;

Bhadra, S. ;

Bienstock, S. ;

Blondel, A. ;

Bolognesi, S. ;

Bourguille, B. ;

Boyd, S. B. ;

Brailsford, D. ;

Bravar, A. ;

Berguno, D. Bravo ;

Bronner, C. ;

Bubak, A. ;

Avanzini, M. Buizza ;

Calcutt, J. ;

Campbell, T. ;

Cao, S. ;

Cartwright, S. L. ;

Catanesi, M. G. ;

Cervera, A. ;

Chappell, A. ;

Checchia, C. ;

Cherdack, D. ;

Chikuma, N. ;

Christodoulou, G. ;

Coleman, J. ;

Collazuol, G. ;

Cook, L. ;

Coplowe, D. .

NATURE, 2020, 580 (7803) :339-+

[5] Precision early universe thermodynamics made simple: Neff and neutrino decoupling in the Standard Model and beyond [J].

Abenza, Miguel Escudero .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2020, (05)

[6] Constraint on neutrino decay with medium-baseline reactor neutrino oscillation experiments [J].

Abrahao, Thamys ;

Minakata, Hisakazu ;

Nunokawa, Hiroshi ;

Quiroga, Alexander A. .

JOURNAL OF HIGH ENERGY PHYSICS, 2015, (11) :1-25

[7] First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA [J].

Acero, M. A. ;

Adamson, P. ;

Aliaga, L. ;

Alion, T. ;

Allakhverdian, V ;

Altakarli, S. ;

Anfimov, N. ;

Antoshkin, A. ;

Aurisano, A. ;

Back, A. ;

Backhouse, C. ;

Baird, M. ;

Balashov, N. ;

Baldi, P. ;

Bambah, B. A. ;

Bashar, S. ;

Bays, K. ;

Bending, S. ;

Bernstein, R. ;

Bhatnagar, V ;

Bhuyan, B. ;

Bian, J. ;

Blackburn, T. ;

Blair, J. ;

Booth, A. C. ;

Bour, P. ;

Bromberg, C. ;

Buchanan, N. ;

Butkevich, A. ;

Calvez, S. ;

Campbell, M. ;

Carroll, T. J. ;

Catano-Mur, E. ;

Cedeno, A. ;

Childress, S. ;

Choudhary, B. C. ;

Chowdhury, B. ;

Coan, T. E. ;

Colo, M. ;

Cooper, J. ;

Corwin, L. ;

Cremonesi, L. ;

Davies, G. S. ;

Derwent, P. F. ;

Ding, P. ;

Djurcic, Z. ;

Doyle, D. ;

Dukes, E. C. ;

Duyang, H. ;

Edayath, S. .

PHYSICAL REVIEW LETTERS, 2019, 123 (15)

[8] Planck 2018 results: I. Overview and the cosmological legacy of Planck [J].

Aghanim, N. ;

Akrami, Y. ;

Arroja, F. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Ballardini, M. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartolo, N. ;

Basak, S. ;

Battye, R. ;

Benabed, K. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bock, J. J. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Boulanger, F. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Carron, J. ;

Casaponsa, B. ;

Challinor, A. ;

Chiang, H. C. ;

Colombo, L. P. L. ;

Combet, C. ;

Contreras, D. ;

Crill, B. P. ;

Cuttaia, F. ;

de Bernardis, P. ;

de Zotti, G. ;

Delabrouille, J. ;

Delouis, J. -M. ;

Desert, F. -X. ;

Di Valentino, E. ;

Dickinson, C. ;

Diego, J. M. ;

Donzelli, S. ;

Dore, O. ;

Douspis, M. ;

Ducout, A. ;

Dupac, X. ;

Efstathiou, G. ;

Elsner, F. .

ASTRONOMY & ASTROPHYSICS, 2020, 641

[9] Planck 2018 results: V. CMB power spectra and likelihoods [J].