11 citations · 19 across the 4 of their papers we have counts for
5 papers
QCD Crossover Transfer Functions for Scalar-Induced Gravitational Waves in the PTA Band
Gabriele Franciolini, Xavier Pritchard, Yuichiro Tada
Pulsar timing array (PTA) collaborations have reported evidence for a stochastic gravitational wave (GW) background in the nHz band. Should scalar-induced GWs, sourced at second or…
Bumpy inflation from explosive particle production
Kaloian D. Lozanov, Xavier Pritchard, Misao Sasaki
We present a first-principles derivation of an effective inflaton potential with a bumpy feature. We consider the coupling of a spectator field χto the inflaton ϕsuch that χis mass…
Beyond Standard Model equation of state and primordial black holes
Xavier Pritchard, Matthew Starbuck, Wingfung Leung
The Standard Model of particle physics successfully describes all known fundamental particles and their interactions; however, it leaves several unanswered questions. Theories beyo…
Robust μ-distortion constraints on primordial supermassive black holes from cubic (gNL) non-Gaussian perturbations
Xavier Pritchard, Christian T. Byrnes, Julien Lesgourgues +1
We make the first calculation of the spectral distortion constraints on the primordial curvature power spectrum in the limit of large cubic non-Gaussianity. This calculation involv…
Constraining the impact of standard model phase transitions on primordial black holes
Xavier Pritchard, Christian T. Byrnes
Phase transitions in the early universe lead to a reduction in the equation of state of the primordial plasma. This exponentially enhances the formation rate of primordial black ho…