20.500.12556/DiRROS-28461 PT2GWFinder a package for cosmological first-order phase transitions and gravitational waves PT2GWFfinder: a package for cosmological first-order phase transitions and gravitational waves The detection of gravitational waves from binary black hole and neutron star mergers by ground-based interferometers, as well as the evidence for a gravitational wave background from pulsar timing array experiments, has marked a new era in astrophysics and cosmology. These experiments also have great potential for discovering new physics through gravitational wave detection. One of the most motivated sources of gravitational waves that can be realized only within a beyond-the-Standard-Model framework is first-order phase transitions. In this work we release PT2GWFinder, a Mathematica package designed to compute phase transition parameters and the gravitational wave power spectrum for an arbitrary scalar theory exhibiting a first-order phase transition, in scenarios where a single scalar acquires a vacuum expectation value. PT2GWFinder performs the phase tracing, computes the bounce profile and action using FindBounce, calculates the relevant temperatures and phase transition parameters, and finally evaluates the gravitational wave spectrum. Additionally, it offers a user-friendly interface with DRalgo, which enables the computation of the dimensionally reduced effective potential in the high-temperature regime. This work includes a user manual and two models that demonstrate the capability and performance of PT2GWFinder. As a supplement, for one of these models we obtain the bounce solution and action analytically in the thin-wall approximation and demonstrate excellent agreement with the numerical approach. gravitational waves PT2GWFinder early universe gravitacijski valovi PT2GWFinder zgodnje vesolje true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2026 The Authors. Neznano 2026-03-20 11:20:43 2026-03-20 11:20:44 2026-03-26 03:48:16 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Soavtor iz Slovenije: Miha Nemevšek; Opis vira z dne 16. 3. 2026; str. 1-61 Vol. 49, [article no.] 110119 [in press] 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-05-28 2026-03-03 2026-03-09 539.1 1879-2944 10.1016/j.cpc.2026.110119 271781635 https://www.sciencedirect.com/science/article/pii/S0010465526001013?via%3Dihub 1 784d3fcf-2446-11f1-b469-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=42166 RAZ_Brdar_Vedran_2026.pdf RAZ_Brdar_Vedran_2026.pdf 1 C125172919847DDFB355EF36B169A055 67748ca3f0c7792ec78d3cdc389cef6035d03f4ff974444afa72c81e88da4cc0 ebc23c5a-2446-11f1-b469-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=42169 Institut Jožef Stefan 0 0 0