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In this work, we demonstrate the complete process of using space-based gravitational wave detectors to measure properties of the stochastic gravitational wave background arising from a first-order electroweak phase transition. Based on…

High Energy Physics - Phenomenology · Physics 2026-05-21 Shuo Guan , Huai-Ke Guo , Dian Jiao , Qingyuan Liang , Lei Wu , Yang Zhang

We present a dedicated complementarity study of gravitational wave and collider measurements of the simplest extension of the Higgs sector: the singlet scalar augmented Standard Model. We study the following issues: (i) the electroweak…

High Energy Physics - Phenomenology · Physics 2019-04-12 Alexandre Alves , Tathagata Ghosh , Huai-Ke Guo , Kuver Sinha , Daniel Vagie

We investigate the effect of extra singlets on the electroweak phase transition (EWPT) strength and the spectrum of the corresponding gravitational waves (GWs). We consider here the standard model (SM) extended with a singlet scalar with…

High Energy Physics - Phenomenology · Physics 2018-12-27 Amine Ahriche , Katsuya Hashino , Shinya Kanemura , Salah Nasri

We investigate the capability of the Taiji space-based gravitational wave observatory to detect stochastic gravitational wave backgrounds produced by first-order phase transitions in the early universe. Using a comprehensive simulation…

General Relativity and Quantum Cosmology · Physics 2025-07-29 Fan Huang , Zu-Cheng Chen , Qing-Guo Huang

The Standard Model (SM) cannot explain the observed baryon asymmetry of the Universe (BAU), thus driving the need for physics beyond the SM, which can generate electroweak baryogenesis through a strong first-order electroweak phase…

High Energy Physics - Phenomenology · Physics 2025-11-18 Dilip Kumar Ghosh , Debadrita Mukherjee , Koustav Mukherjee , Rohan Pramanick

The real singlet extension of the Standard Model (SM), RxSM, is one of the simplest Beyond-the-Standard Model (BSM) theories that can accommodate a strong first-order electroweak phase transition (SFOEWPT). We survey the possible thermal…

High Energy Physics - Phenomenology · Physics 2025-10-15 Johannes Braathen , Sven Heinemeyer , Carlos Pulido Boatella , Alain Verduras Schaeidt

In this work we discuss two different phases of a complex singlet extension of the Standard Model (SM) together with an extension that also includes new fermion fields, in particular, a Majoron model equipped with an inverse seesaw…

High Energy Physics - Phenomenology · Physics 2022-03-30 Felipe F. Freitas , Gabriel Lourenço , António P. Morais , André Nunes , João Olívia , Roman Pasechnik , Rui Santos , João Viana

In this paper we consider an extension of the Standard Model(SM) with additional gauge singlets which exhibits a strong first order phase transition. Due to this first order phase transition in the early universe gravitational waves are…

High Energy Physics - Phenomenology · Physics 2018-12-05 Mina Saeedhoseini , Ali Tofighi

One of the simplest models that allows for an electroweak (EW) strong first order phase transition (SFOPT) while having a Higgs with the observed mass of 125 GeV is the singlet extension of the Standard Model (SM). We discuss two different…

High Energy Physics - Phenomenology · Physics 2022-07-29 Rui Santos

We provide a roadmap for analyzing the interplay between hypothetical future collider observations and the detection of a gravitational wave signal produced by a strong first order electroweak phase transition in beyond the Standard Model…

High Energy Physics - Phenomenology · Physics 2024-05-06 Leon S. Friedrich , Michael J. Ramsey-Musolf , Tuomas V. I. Tenkanen , Van Que Tran

We perform a global fit of the extended scalar singlet model with a fermionic dark matter (DM) candidate. Using the most up-to-date results from the $\mathit{Planck}$ measured DM relic density, direct detection limits from the XENON1T…

High Energy Physics - Phenomenology · Physics 2019-03-01 Ankit Beniwal , Marek Lewicki , Martin White , Anthony G. Williams

In this work, we study the future probes of the complex singlet extension to the Standard Model (cxSM). This model is possible to realize a strongly first-order electroweak phase transition (SFOEWPT). The cxSM naturally provides dark matter…

High Energy Physics - Phenomenology · Physics 2020-05-06 Ning Chen , Tong Li , Yongcheng Wu , Ligong Bian

Among various scenarios of baryon asymmetry of the Universe, electroweak baryogenesis is directly connected with physics of the Higgs sector. We discuss spectra of gravitational waves which are originated by the strongly first order phase…

High Energy Physics - Phenomenology · Physics 2018-01-24 Toshinori Matsui

The inert doublet model is a well-motivated extension of the Standard Model that contains a dark matter candidate and modifies the dynamics of the electroweak symmetry breaking. In order to detail its phenomenology, we perform a…

High Energy Physics - Phenomenology · Physics 2022-12-28 Nico Benincasa , Luigi Delle Rose , Kristjan Kannike , Luca Marzola

We study the possible gravitational wave signal and the viability of baryogenesis arising from the electroweak phase transition in an extension of the Standard Model (SM) by a scalar singlet field without a $\mathbb{Z}_2$ symmetry. We first…

High Energy Physics - Phenomenology · Physics 2023-02-08 John Ellis , Marek Lewicki , Marco Merchand , José Miguel No , Mateusz Zych

We analyse a simple extension of the SM with just an additional scalar singlet coupled to the Higgs boson. We discuss the possible probes for electroweak baryogenesis in this model including collider searches, gravitational wave and direct…

High Energy Physics - Phenomenology · Physics 2017-09-13 Ankit Beniwal , Marek Lewicki , James D. Wells , Martin White , Anthony G. Williams

Taiji, a Chinese space-based gravitational wave (GW) detection project, aims to explore the millihertz GW universe with unprecedented sensitivity. By observing astrophysical and cosmological sources, including Galactic binaries, massive…

We study the phenomenology of gauge singlet extensions of the Standard Model scalar sector and their implications for the electroweak phase transition. We determine the conditions on the scalar potential parameters that lead to a strong…

High Energy Physics - Phenomenology · Physics 2009-01-06 Stefano Profumo , Michael J. Ramsey-Musolf , Gabe Shaughnessy

The direct observation of gravitational waves (GWs) opens a new window for exploring new physics from quanta to cosmos and provides a new tool for probing the evolution of universe. GWs detection in space covers a broad spectrum ranging…

General Relativity and Quantum Cosmology · Physics 2023-08-17 Zhixiang Ren , Tianyu Zhao , Zhoujian Cao , Zong-Kuan Guo , Wen-Biao Han , Hong-Bo Jin , Yue-Liang Wu

We study scalar singlet extensions of the Standard Model (SM), focusing on scenarios where dark matter (DM) is stabilized by a \(\mathbb{Z}_2\) symmetry. In the minimal single-scalar extension of the SM, only a narrow region near the Higgs…

High Energy Physics - Phenomenology · Physics 2026-02-17 Tripurari Srivastava , Jaydeb Das , Anupam Ghosh , Arnab Chaudhuri
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