All Outputs (7)

Effective field theory approach to thermal bubble nucleation (2021)
Journal Article
Gould, O., & Hirvonen, J. (2021). Effective field theory approach to thermal bubble nucleation. Physical Review D, 104(9), Article 096015. https://doi.org/10.1103/PhysRevD.104.096015

The standard vacuum bounce formalism suffers from inconsistencies when applied to thermal bubble nucleation, for which ad hoc workarounds are commonly adopted. Identifying the length scales on which nucleation takes place, we demonstrate how the cons... Read More about Effective field theory approach to thermal bubble nucleation.

Vacuum bubble collisions: From microphysics to gravitational waves (2021)
Journal Article
Gould, O., Sukuvaara, S., & Weir, D. (2021). Vacuum bubble collisions: From microphysics to gravitational waves. Physical Review D, 104(7), Article 075039. https://doi.org/10.1103/physrevd.104.075039

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 large dynamical range, making use of symmetry to reduce the dimensional... Read More about Vacuum bubble collisions: From microphysics to gravitational waves.

Schwinger pair production of magnetic monopoles: Momentum distribution for heavy-ion collisions (2021)
Journal Article
Gould, O., Ho, D. L., & Rajantie, A. (2021). Schwinger pair production of magnetic monopoles: Momentum distribution for heavy-ion collisions. Physical Review D, 104(1), Article 015033. https://doi.org/10.1103/PhysRevD.104.015033

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 heavy-ion collisions. We use the complex worldline instanton method to ca... Read More about Schwinger pair production of magnetic monopoles: Momentum distribution for heavy-ion collisions.

On the perturbative expansion at high temperature and implications for cosmological phase transitions (2021)
Journal Article
Gould, O., & Tenkanen, T. V. I. (2021). On the perturbative expansion at high temperature and implications for cosmological phase transitions. Journal of High Energy Physics, 2021(06), Article 69. https://doi.org/10.1007/JHEP06%282021%29069

We revisit the perturbative expansion at high temperature and investigate its convergence by inspecting the renormalisation scale dependence of the effective potential. Although at zero temperature the renormalisation group improved effective potenti... Read More about On the perturbative expansion at high temperature and implications for cosmological phase transitions.

Theoretical uncertainties for cosmological first-order phase transitions (2021)
Journal Article
Croon, D., Gould, O., Schicho, P., Tenkanen, T. V., & White, G. (2021). Theoretical uncertainties for cosmological first-order phase transitions. Journal of High Energy Physics, 2021(4), Article 55. https://doi.org/10.1007/JHEP04%282021%29055

We critically examine the magnitude of theoretical uncertainties in perturbative calculations of fist-order phase transitions, using the Standard Model effective field theory as our guide. In the usual daisy-resummed approach, we find large uncertain... Read More about Theoretical uncertainties for cosmological first-order phase transitions.

Theoretical uncertainties for cosmological first-order phase transitions (2021)
Journal Article
Croon, D., Gould, O., Schicho, P., Tenkanen, T. V. I., & White, G. (2021). Theoretical uncertainties for cosmological first-order phase transitions. Journal of High Energy Physics, 2021(4), Article 55. https://doi.org/10.1007/JHEP04%282021%29055

We critically examine the magnitude of theoretical uncertainties in perturbative calculations of fist-order phase transitions, using the Standard Model effective field theory as our guide. In the usual daisy-resummed approach, we find large uncertain... Read More about Theoretical uncertainties for cosmological first-order phase transitions.

Real scalar phase transitions: a nonperturbative analysis (2021)
Journal Article
Gould, O. (2021). Real scalar phase transitions: a nonperturbative analysis. Journal of High Energy Physics, 2021(04), Article 57. https://doi.org/10.1007/JHEP04%282021%29057

We study the thermal phase transitions of a generic real scalar field, without a Z2-symmetry, referred to variously as an inert, sterile or singlet scalar, or ϕ3 + ϕ4 theory. Such a scalar field arises in a wide range of models, including as the infl... Read More about Real scalar phase transitions: a nonperturbative analysis.