Search Publications
Invisible dilaton
Brax, Philippe; Valageas, Patrick; Burrage, Clare +1 more
We analyze the dynamics of a light scalar field responsible for the µ term of the Higgs potential and coupled to matter via the Higgs-portal mechanism. We find that this dilaton model is stable under radiative corrections induced by the standard model particle masses. When the background value of the scalar field is stabilized at the minimum…
Calibrating the effective magnitudes of type Ia supernovae with a model-independent method
Li, Zhongmu; Chen, Jing; Hu, Jian +2 more
This research explores the correlation between the absolute magnitude and the redshift of type Ia supernovae (SNe Ia) with a model-independent approach. The Pantheon sample of SNe Ia and strong gravitational lensing systems (SGLS) are used. With the cosmic distance-duality relation (CDDR), the evolution parameter of the magnitude, the light curve …
Investigating starburst-driven neutrino emission from galaxies in the Great Observatories All-Sky LIRG Survey
Privon, G. C.; van Eijndhoven, N.; Merckx, Y. +3 more
We present a phenomenological framework for starburst-driven neutrino production via proton-proton collisions and apply it to (ultra)luminous infrared galaxies (U/LIRGs) in the Great Observatories All-Sky LIRG Survey (GOALS). The framework relates the infrared luminosity of a GOALS galaxy, derived from consistently available Herschel Space Observa…
Noise effect of test mass surface roughness in spaceborne gravitational wave detectors
Wang, Shun; Yan, Hao; Miao, Haixing +2 more
The spaceborne gravitational wave detection mission has a demanding requirement for the precision of displacement sensing, which is conducted by the interaction between the laser field and test mass. However, due to the roughness of the reflecting surface of the test mass, the displacement measurement along the sensitive axis suffers a coupling er…
Primordial black hole production during first-order phase transitions
Cai, Rong-Gen; Guo, Zong-Kuan; Liu, Jing +2 more
A novel mechanism for the primordial black hole (PBH) production is proposed as a natural and inevitable consequence of general first-order phase transitions without reference to specific underlying particle physics models. We obtain mutual predictions and constraints between primordial black holes and gravitational waves from phase transitions in…
Upper limit on the axion-photon coupling from magnetic white dwarf polarization
Safdi, Benjamin R.; Dessert, Christopher; Dunsky, David
Polarization measurements of thermal radiation from magnetic white dwarf (MWD) stars have been proposed as a probe of axion-photon mixing. The radiation leaving the surface of the MWD is unpolarized, but if low-mass axions exist then photons polarized parallel to the direction of the MWD's magnetic field may convert into axions, which induces a li…
Hunt for light primordial black hole dark matter with ultrahigh-frequency gravitational waves
Franciolini, Gabriele; Maharana, Anshuman; Muia, Francesco
Light primordial black holes may comprise a dominant fraction of the dark matter in our Universe. This paper critically assesses whether planned and future gravitational wave detectors in the ultrahigh-frequency band could constrain the fraction of dark matter composed of subsolar primordial black holes. Adopting the state-of-the-art description o…
Sensitivities on nonspinning and spinning primordial black hole dark matter with global 21-cm troughs
Laha, Ranjan; Saha, Akash Kumar
Detection of the global 21 cm signal arising from neutral hydrogen can revolutionize our understanding of the standard evolution of the Universe after recombination. In addition, it can also be an excellent probe of dark matter (DM). Among all the DM candidates, primordial black holes (PBHs) are one of the most well motivated. Hawking emission fro…
Asteroids for µ Hz gravitational-wave detection
Rajendran, Surjeet; Graham, Peter W.; Fedderke, Michael A.
A major challenge for gravitational-wave (GW) detection in the µ Hz band is engineering a test mass (TM) with sufficiently low acceleration noise. We propose a GW detection concept using asteroids located in the inner Solar System as TMs. Our main purpose is to evaluate the acceleration noise of asteroids in the µ Hz band. We show that…
Dark dimension, the swampland, and the dark matter fraction composed of primordial black holes
Anchordoqui, Luis A.; Antoniadis, Ignatios; Lüst, Dieter
Very recently, it was suggested that combining the swampland program with the smallness of the dark energy and confronting these ideas to experiment lead to the prediction of the existence of a single extra dimension (dubbed the dark dimension) with characteristic length scale in the micron range. We show that the rate of Hawking radiation slows d…