Addendum : refined bounds on MeV-scale thermal dark sectors from BBN and the CMB
Sabti, Nashwan (Technische Universität München. Physik Department)
Alvey, James (Technische Universität München. Physik Department)
Escudero, Miguel- (Technische Universität München. Physik Department)
Fairbairn, Malcolm (Technische Universität München. Physik Department)
Blas Temiño, Diego (Universitat Autònoma de Barcelona. Departament de Física)

Fecha:	2021
Resumen:	Very recently, the LUNA collaboration has reported a new measurement of the d+p → 3He+γ reaction rate, which plays an important role in the prediction of the primordial deuterium abundance at the time of BBN. This new measurement has triggered a new set of global BBN analyses within the context of the Standard Model. In this addendum to JCAP 01 (2020) 004 (arXiv:1910. 01649), we consider the implications of these new results for our constraints on MeV-scale dark sectors. Importantly, we find that our bounds in the BBNonly and Planck-only analyses are insensitive to these updates. Similarly, we find that our constraints derived using BBN and CMB data simultaneously are not significantly modified for neutrinophilic particles. The bounds on electrophilic dark sector states, however, can vary moderately when combining BBN and CMB observations. We present updated results for all the relevant light dark sector states, calculated using the rates obtained by the leading groups performing standard BBN analyses.
Ayudas:	European Commission 690323
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Big bang nucleosynthesis ; Cosmology of theories beyond the SM ; Dark mattert heory ; Particle physics ; Cosmology connection
Publicado en:	Journal of Cosmology and Astroparticle Physics, Vol. 2021 (Aug. 2021) , art. A01, ISSN 1475-7516

DOI: 10.1088/1475-7516/2021/08/A01

6 p, 826.9 KB

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