Search Results - "Hajkarim, Fazlollah"

Thermal QCD Axions across Thresholds by D’Eramo, Francesco, Hajkarim, Fazlollah, Yun, Seokhoon

“…A bstract Thermal axion production in the early universe goes through several mass thresholds, and the resulting rate may change dramatically across them…”
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Neutralino dark matter in scenarios with early matter domination by Drees, Manuel, Hajkarim, Fazlollah

“…A bstract We investigate the production of neutralino dark matter in a cosmological scenario featuring an early matter dominated era ending at a relatively low…”
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Shedding new light on sterile neutrinos from XENON1T experiment by Shakeri, Soroush, Hajkarim, Fazlollah, Xue, She-Sheng

“…A bstract The XENON1T collaboration recently reported the excess of events from recoil electrons, possibly giving an insight into new area beyond the Standard…”
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Thermal Axion Production at Low Temperatures: A Smooth Treatment of the QCD Phase Transition by D'Eramo, Francesco, Hajkarim, Fazlollah, Yun, Seokhoon

“…We study thermal axion production around the confinement scale. At higher temperatures, we extend current calculations to account for the masses of heavy…”
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On the viability of Planck scale cosmology with quartessence by Khodadi, Mohsen, Nozari, Kourosh, Hajkarim, Fazlollah

“…Growing evidence as the observations of the CMB (cosmic microwave background), galaxy clustering and high-redshift supernovae address a stable dynamically…”
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Lepton g-2 and W-boson mass anomalies in the DFSZ axion model by Ahmadvand, Moslem, Hajkarim, Fazlollah

“…With regard to the leptonic magnetic dipole moment anomaly as well as the W -boson mass excess, we study the DFSZ axion model. Considering theoretical and…”
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Lepton [Formula omitted] and W-boson mass anomalies in the DFSZ axion model by Ahmadvand, Moslem, Hajkarim, Fazlollah

“…With regard to the leptonic magnetic dipole moment anomaly as well as the W-boson mass excess, we study the DFSZ axion model. Considering theoretical and…”
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Lepton $$g-2$$ g - 2 and W-boson mass anomalies in the DFSZ axion model by Moslem Ahmadvand, Fazlollah Hajkarim

“…Abstract With regard to the leptonic magnetic dipole moment anomaly as well as the W-boson mass excess, we study the DFSZ axion model. Considering theoretical…”
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Pion Condensation in the Early Universe at Nonvanishing Lepton Flavor Asymmetry and Its Gravitational Wave Signatures by Vovchenko, Volodymyr, Brandt, Bastian B, Cuteri, Francesca, Endrődi, Gergely, Hajkarim, Fazlollah, Schaffner-Bielich, Jürgen

“…We investigate the possible formation of a Bose-Einstein condensed phase of pions in the early Universe at nonvanishing values of lepton flavor asymmetries. A…”
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New constraints on axion-like particles from IXPE polarization data for magnetars by Gau, Ephraim, Hajkarim, Fazlollah, Harris, Steven P., Bhupal Dev, P.S., Fortin, Jean-Francois, Krawczynski, Henric, Sinha, Kuver

“…We derive new constraints on axion-like particles (ALPs) using precision X-ray polarization studies of magnetars. Specifically, we use the first detection of…”
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Probing Axions via Light Circular Polarization and Event Horizon Telescope by Shakeri, Soroush, Hajkarim, Fazlollah

“…JCAP04(2023)017 The impact of axion-like particles on the light polarization around the horizon of suppermassive black hole (SMBH) is discussed in the light of…”
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Lepton $g-2$ and $W$-boson mass anomalies in the DFSZ axion model by Ahmadvand, Moslem, Hajkarim, Fazlollah

“…Eur.Phys.J.C (2023) 83: 1021 With regard to the leptonic magnetic dipole moment anomaly as well as the $W$-boson mass excess, we study the DFSZ axion model…”
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Dark Radiation from the Primordial Thermal Bath in Momentum Space by D'Eramo, Francesco, Hajkarim, Fazlollah, Lenoci, Alessandro

“…JCAP03(2024)009 Motivated by the stunning projections for future CMB surveys, we evaluate the amount of dark radiation produced in the early Universe by…”
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Primordial Gravitational Waves in Nonstandard Cosmologies by Bernal, Nicolás, Hajkarim, Fazlollah

“…Phys. Rev. D 100, 063502 (2019) Assuming that inflation is followed by a phase where the energy density of the Universe is dominated by a component with a…”
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Neutralino Dark Matter in Scenarios with Early Matter Domination by Drees, Manuel, Hajkarim, Fazlollah

“…JHEP 1812 (2018) 042 We investigate the production of neutralino dark matter in a cosmological scenario featuring an early matter dominated era ending at a…”
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Axion Dark Matter in the Time of Primordial Black Holes by Bernal, Nicolás, Hajkarim, Fazlollah, Xu, Yong

“…Phys. Rev. D 104, 075007 (2021) We investigate the production of QCD axion dark matter in a nonstandard cosmological era triggered by primordial black holes…”
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Thermal History of the Early Universe and Primordial Gravitational Waves from Induced Scalar Perturbations by Hajkarim, Fazlollah, Schaffner-Bielich, Jürgen

“…Phys. Rev. D 101, 043522 (2020) We study the induced primordial gravitational waves (GW) coming from the effect of scalar perturbation on the tensor…”
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Dark Matter Production in an Early Matter Dominated Era by Drees, Manuel, Hajkarim, Fazlollah

“…JCAP 1802 (2018) no.02, 057 We investigate dark matter (DM) production in an early matter dominated era where a heavy long-lived particle decays to radiation…”
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A Precise Fitting Formula for Gravitational Wave Spectra from Phase Transitions by Guo, Huai-ke, Hajkarim, Fazlollah, Sinha, Kuver, White, Graham, Xiao, Yang

“…Obtaining a precise form for the predicted gravitational wave (GW) spectrum from a phase transition is a topic of great relevance for beyond Standard Model…”
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Thermal axion production at low temperatures: a smooth treatment of the QCD phase transition by D'Eramo, Francesco, Hajkarim, Fazlollah, Yun, Seokhoon

“…Phys. Rev. Lett. 128 (2022), 152001 We study thermal axion production around the confinement scale. At higher temperatures, we extend current calculations to…”
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