The effects of QCD equation of state on the relic density of WIMP dark matter M Drees, F Hajkarim, ER Schmitz
Journal of Cosmology and Astroparticle Physics 2015 (06), 025, 2015
142 2015 Primordial gravitational waves in nonstandard cosmologies N Bernal, F Hajkarim
Physical Review D 100 (6), 063502, 2019
71 2019 Dark matter production in an early matter dominated era M Drees, F Hajkarim
Journal of Cosmology and Astroparticle Physics 2018 (02), 057, 2018
69 2018 Thermal history of the early Universe and primordial gravitational waves from induced scalar perturbations F Hajkarim, J Schaffner-Bielich
Physical Review D 101 (4), 043522, 2020
60 2020 Neutralino dark matter in scenarios with early matter domination M Drees, F Hajkarim
Journal of High Energy Physics 2018 (12), 1-28, 2018
46 2018 Thermal axion production at low temperatures: a smooth treatment of the QCD phase transition F D’Eramo, F Hajkarim, S Yun
Physical Review Letters 128 (15), 152001, 2022
44 2022 Thermal QCD Axions across Thresholds F D’Eramo, F Hajkarim, S Yun
Journal of High Energy Physics 2021 (10), 1-60, 2021
43 2021 Cosmological bound on the QCD axion mass, redux F D'Eramo, E Di Valentino, W Giare, F Hajkarim, A Melchiorri, O Mena, ...
Journal of Cosmology and Astroparticle Physics 2022 (09), 022, 2022
42 2022 Primordial gravitational wave signals in modified cosmologies N Bernal, A Ghoshal, F Hajkarim, G Lambiase
Journal of Cosmology and Astroparticle Physics 2020 (11), 051, 2020
40 2020 Pion condensation in the early universe at nonvanishing lepton flavor asymmetry and its gravitational wave signatures V Vovchenko, BB Brandt, F Cuteri, G Endrődi, F Hajkarim, ...
Physical Review Letters 126 (1), 012701, 2021
37 2021 Axion dark matter in the time of primordial black holes N Bernal, F Hajkarim, Y Xu
Physical Review D 104 (7), 075007, 2021
32 2021 Shedding new light on sterile neutrinos from XENON1T experiment S Shakeri, F Hajkarim, SS Xue
Journal of High Energy Physics 2020 (12), 1-33, 2020
26 2020 Stability of Einstein static universe over Lyra geometry F Darabi, Y Heydarzade, F Hajkarim
Canadian Journal of Physics 93 (12), 1566-1570, 2015
26 2015 Did we hear the sound of the Universe boiling? Analysis using the full fluid velocity profiles and NANOGrav 15-year data T Ghosh, A Ghoshal, HK Guo, F Hajkarim, SF King, K Sinha, X Wang, ...
arXiv preprint arXiv:2307.02259, 2023
25 * 2023 Effects of the QCD equation of state and lepton asymmetry on primordial gravitational waves S Wystub, MM Wygas, F Hajkarim, J Schaffner-Bielich
Physical Review D 99 (arXiv: 1904.01046), 2019
19 * 2019 On the viability of Planck scale cosmology with quartessence M Khodadi, K Nozari, F Hajkarim
The European Physical Journal C 78, 1-12, 2018
15 2018 Probing axions via light circular polarization and event horizon telescope S Shakeri, F Hajkarim
Journal of Cosmology and Astroparticle Physics 2023 (04), 017, 2023
10 2023 New Constraints on Axion-Like Particles from IXPE Polarization Data for Magnetars E Gau, F Hajkarim, SP Harris, PS Dev, JF Fortin, H Krawczynski, K Sinha
arXiv preprint arXiv:2312.14153, 2023
1 2023 Lepton W -boson mass anomalies in the DFSZ axion model M Ahmadvand, F Hajkarim
The European Physical Journal C 83 (11), 1021, 2023
1 2023 Dark radiation from the primordial thermal bath in momentum space F D'Eramo, F Hajkarim, A Lenoci
Journal of Cosmology and Astroparticle Physics 2024 (03), 009, 2024
2024 