TY  - CONF
AU  - Vogel, Hendrik
AU  - Redondo, Javier
TI  - Dark Radiation from a hidden U(1)
CY  - Hamburg
PB  - Verlag Deutsches Elektronen-Synchrotron
M1  - PUBDB-2016-05939
SN  - 978-3-935702-59-1
T2  - DESY-PROC
SP  - 196-199
PY  - 2014
AB  - We discuss the impact of a hidden sector consisting of Minicharged Particles (MCPs) and massless hidden photons on the expansion history of our Universe. We present parameter scans for the amount of extra relativistic particles (N<sub>\texteff</sub>) and the abundance of light nuclei for fermionic MCPs with masses between  ∼ 100 keV and 10 GeV and minicharges in the range 10<sup>−11</sup>−1. Current CMB and BBN data significantly constrain the available parameter space of MCPs. The shown results are a valuable indicator for future experimental searches and are presented in a flexible way so that more accurate results on N<sub>eff</sub> can be easily interpreted.
T2  - 10th Patras Workshop on Axions, WIMPs and WISPs
CY  - 29 Jun 2014 - 4 Jul 2014, Geneva (Switzerland)
Y2  - 29 Jun 2014 - 4 Jul 2014
M2  - Geneva, Switzerland
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.3204/DESY-PROC-2014-03/vogel_hendrik
UR  - https://bib-pubdb1.desy.de/record/315532
ER  -