First Order Phase Transition Induced Graviton Bremsstrahlung: A Multi Peak Gravitational Wave Signature

[2608.14782] First Order Phase Transition Induced Graviton Bremsstrahlung: A Multi Peak Gravitational Wave Signature Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search High Energy Physics - Phenomenology arXiv:2608.14782 (hep-ph) [Submitted on 14 Aug 2026] Title: First Order Phase Transition Induced Graviton Bremsstrahlung: A Multi Peak Gravitational Wave Signature Authors: Dipendu Bhandari , Rajat Kumar Mandal , Arunansu Sil View a PDF of the paper titled First Order Phase Transition Induced Graviton Bremsstrahlung: A Multi Peak Gravitational Wave Signature, by Dipendu Bhandari and 2 other authors View PDF HTML (experimental) Abstract: Gravitational waves (GWs) from first order phase transitions (FOPTs) are conventionally sourced by bubble collisions, sound waves, and plasma turbulence. We propose a novel microscopic GW source arising from graviton bremsstrahlung during the decay of the scalar field driving the FOPT. In the presence of Yukawa interactions with light fermions, the scalar decay is inevitably accompanied by graviton emission due to the universal coupling of gravity to the energy-momentum tensor. We show that these gravitons generate an additional stochastic GW background during the phase-transition epoch, complementing the conventional FOPT signal. The resulting GW spectrum can exhibit a characteristic multi-peaked structure. Unlike scenarios in which different GW components originate from distinct cosmological epochs, all contributions considered here emerge from the dynamics of the same FOPT, offering a unique probe of both its microscopic particle dynamics and macroscopic plasma evolution. Comments: 13 pages, 6 figures Subjects: High Energy Physics - Phenomenology (hep-ph) ; High Energy Physics - Theory (hep-th) Cite as: arXiv:2608.14782 [hep-ph] (or arXiv:2608.14782v1 [hep-ph] for this version) https://doi.org/10.48550/arXiv.2608.14782 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Arunansu Sil [ view email ] [v1] Fri, 14 Aug 2026 18:00:01 UTC (232 KB) Full-text links: Access Paper: View a PDF of the paper titled First Order Phase Transition Induced Graviton Bremsstrahlung: A Multi Peak Gravitational Wave Signature, by Dipendu Bhandari and 2 other authors View PDF HTML (experimental) TeX Source view license Current browse context: hep-ph < prev | next > new | recent | 2026-08 Change to browse by: hep-th References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) IArxiv recommender toggle IArxiv Recommender ( What is IArxiv? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from

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