359 citations · 1.4k across the 21 of their papers we have counts for
21 papers
BubbleDet: A Python package to compute functional determinants for bubble nucleation
Andreas Ekstedt, Oliver Gould, Joonas Hirvonen
We present a Python package, BubbleDet, for computing one-loop functional determinants around spherically symmetric background fields. This gives the next-to-leading order correcti…
Radiative first-order phase transitions to next-to-next-to-leading order
Andreas Ekstedt, Oliver Gould, Johan Löfgren
We develop new perturbative tools to accurately study radiatively-induced first-order phase transitions. Previous perturbative methods have suffered internal inconsistencies and be…
First-order electroweak phase transitions: a nonperturbative update
Oliver Gould, Sinan Güyer, Kari Rummukainen
We study first-order electroweak phase transitions nonperturbatively, assuming any particles beyond the Standard Model are sufficiently heavy to be integrated out at the phase tran…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
Early-Universe Model Building
Pouya Asadi, Saurabh Bansal, Asher Berlin +37
Theoretical investigations into the evolution of the early universe are an essential part of particle physics that allow us to identify viable extensions to the Standard Model as w…
Opportunities for new physics searches with heavy ions at colliders
David d'Enterria, Marco Drewes, Andrea Giammanco +15
Opportunities for searches for phenomena beyond the Standard Model (BSM) using heavy-ions beams at high energies are outlined. Different BSM searches proposed in the last years in…
Cold Atoms in Space: Community Workshop Summary and Proposed Road-Map
Ivan Alonso, Cristiano Alpigiani, Brett Altschul +246
We summarize the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportu…
Effective field theory approach to thermal bubble nucleation
Oliver Gould, Joonas Hirvonen
The standard vacuum bounce formalism suffers from inconsistencies when applied to thermal bubble nucleation, for which ad hoc workarounds are commonly adopted. Identifying the leng…
Vacuum bubble collisions: from microphysics to gravitational waves
Oliver Gould, Satumaaria Sukuvaara, David Weir
We comprehensively study the effects of bubble wall thickness and speed on the gravitational wave emission spectrum of collisions of two vacuum bubbles. We numerically simulate a l…
First experimental search for production of magnetic monopoles via the Schwinger mechanism
B. Acharya, J. Alexandre, P. Benes +64
Schwinger showed that electrically-charged particles can be produced in a strong electric field by quantum tunnelling through the Coulomb barrier. By electromagnetic duality, if ma…
On the perturbative expansion at high temperature and implications for cosmological phase transitions
Oliver Gould, Tuomas V. I. Tenkanen
We revisit the perturbative expansion at high temperature and investigate its convergence by inspecting the renormalisation scale dependence of the effective potential. Although at…
Schwinger pair production of magnetic monopoles: momentum distribution for heavy-ion collisions
Oliver Gould, David L. -J. Ho, Arttu Rajantie
Magnetic monopoles may be produced by the dual Schwinger effect in strong magnetic fields. Today, the strongest known magnetic fields in the universe are produced fleetingly in hea…
Real scalar phase transitions: a nonperturbative analysis
Oliver Gould
We study the thermal phase transitions of a generic real scalar field, without a -symmetry, referred to variously as an inert, sterile or singlet scalar, or theory.…
Theoretical uncertainties for cosmological first-order phase transitions
Djuna Croon, Oliver Gould, Philipp Schicho +2
We critically examine the magnitude of theoretical uncertainties in perturbative calculations of first-order phase transitions, using the Standard Model effective field theory as o…
Nonperturbative analysis of the gravitational waves from a first-order electroweak phase transition
Oliver Gould, Jonathan Kozaczuk, Lauri Niemi +3
We present the first end-to-end nonperturbative analysis of the gravitational wave power spectrum from a thermal first-order electroweak phase transition (EWPT), using the framewor…
Towards Schwinger production of magnetic monopoles in heavy-ion collisions
Oliver Gould, David L. -J. Ho, Arttu Rajantie
Magnetic monopoles may be produced by the Schwinger effect in the strong magnetic fields of peripheral heavy-ion collisions. We review the form of the electromagnetic fields in suc…
New physics searches with heavy-ion collisions at the LHC
Roderik Bruce, David d'Enterria, Albert de Roeck +18
This document summarises proposed searches for new physics accessible in the heavy-ion mode at the CERN Large Hadron Collider (LHC), both through hadronic and ultraperipheral …
Observing Thermal Schwinger Pair Production
Oliver Gould, Stuart Mangles, Arttu Rajantie +2
We study the possibility of observing Schwinger pair production enhanced by a thermal bath of photons. We consider the full range of temperatures and electric field intensities fro…
Worldline sphaleron for thermal Schwinger pair production
Oliver Gould, Arttu Rajantie, Cheng Xie
With increasing temperatures, Schwinger pair production changes from a quantum tunnelling to a classical, thermal process, determined by a worldline sphaleron. We show this and cal…
Magnetic monopole mass bounds from heavy ion collisions and neutron stars
Oliver Gould, Arttu Rajantie
Magnetic monopoles, if they exist, would be produced amply in strong magnetic fields and high temperatures via the thermal Schwinger process. Such circumstances arise in heavy ion…
Thermal Schwinger pair production at arbitrary coupling
Oliver Gould, Arttu Rajantie
We calculate the rate of thermal Schwinger pair production at arbitrary coupling in weak external fields. Our calculations are valid independently of many properties of the charged…