Particle Cosmology Münster @particlecosmologym

[2405.10937] Gravitational waves from low-scale cosmic strings

Preprint: https://arxiv.org/abs/2405.10937 Title: Gravitational waves from low-scale cosmic strings Authors: - Kai Schmitz (1) [https://inspirehep.net/authors/1071227] - Tobias Schröder (1) [https://inspirehep.net/authors/2174896] Affiliations: (1) University of Münster, Institute for Theoretical Physics, Münster, Germany Abstract: Cosmic strings are a common prediction in many grand unified theories and a promising source of stochastic gravitational waves (GWs) from the early Universe. In this paper, we point out that the GW signal from cosmic strings produced at a comparatively low energy scale, v ≲ 10^9 GeV, exhibits several novel features that are not present in the case of high-scale cosmic strings. Our findings notably include (i) a sharp cutoff frequency f_cut in the GW spectrum from the fundamental oscillation mode on closed string loops and (ii) an oscillating pattern in the total GW spectrum from all oscillation modes whose local minima are located at integer multiples of f_cut. These features reflect the fact that string loops produced in the early Universe fail to shrink to zero size because of GW emission within the age of the Universe, if their tension is low enough. In addition, they offer an exciting opportunity to directly probe the discrete spectrum of oscillation modes on closed string loops in GW observations. For strings produced at a scale v ∼ 10^9 GeV, the novel features in the GW spectrum are within the sensitivity reach of future experiments such as BBO and DECIGO. [2405.10937] Gravitational waves from low-scale cosmic strings

The video abstract is now online!
youtu.be/vNO6V9Avf5w?...

28.05.2024 15:34 — 👍 0 🔁 0 💬 0 📌 0

See below, the GW signal from cosmic strings produced at low energy scales exhibits an oscillating pattern close to the spectrum's peak. The local minima are located at integer multiples of the first minimum. Future experiments (DECIGO, BBO) will be sensitive to this feature arxiv.org/abs/2405.10937

28.05.2024 15:33 — 👍 0 🔁 0 💬 0 📌 0

[2404.13035] Embedded domain walls and electroweak baryogenesis

Preprint:https://arxiv.org/abs/2404.13035Title:Embedded domain walls and electroweak baryogenesisAuthors:- Robert Brandenberger (1) [https://inspirehep.net/a... [2404.13035] Embedded domain walls and electroweak baryogenesis

New paper on 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐃𝐨𝐦𝐚𝐢𝐧 𝐖𝐚𝐥𝐥𝐬 𝐚𝐧𝐝 𝐄𝐥𝐞𝐜𝐭𝐫𝐨𝐰𝐞𝐚𝐤
𝐁𝐚𝐫𝐲𝐨𝐠𝐞𝐧𝐞𝐬𝐢𝐬 by Tobias Schröder from our PCM group, in collaboration with Robert Brandenberger!
arxiv.org/abs/2404.13035
Also view the very elucidative video presentation
youtu.be/b0JX_ygGlug?...

22.04.2024 14:17 — 👍 0 🔁 0 💬 0 📌 0

New Physics at the Pulsar Timing Array Frontier Pulsar Timing Array (PTA) collaborations around the globe recently announced compelling evidence for a gravitational-wave background (GWB) at nanohertz frequencies. This breakthrough achievement has i...

Yesterday, Kai Schmitz walked the audience of his seminar talk at the University of Hamburg through the different fields of new physics made more accessible by PTA data! [ indico.desy.de/event/44121/ ]

05.04.2024 11:38 — 👍 0 🔁 0 💬 0 📌 0

You want to know how new physics can leave an imprint in PTA data? Here's a glimpse of the range of new-physics scenarios that we study in our research.
PTA observations are a new versatile tool for many research fields:

05.04.2024 11:33 — 👍 0 🔁 0 💬 0 📌 0

*********************Mein Buch Der Gravitationswellen-Hintergrund wurde entdeckt 🤯 | Niklas Kolorz | #Shorts #MindBlownUniversity

Great youtube short about our milestone of June ’23!
youtube.com/shorts/rd4ZA...

04.04.2024 13:34 — 👍 0 🔁 0 💬 0 📌 0

Last week at the Münster planetarium ...

11.03.2024 17:10 — 👍 3 🔁 1 💬 0 📌 0

Visit our website - amongst our published papers you can find the NANOGrav 15 yr data set!
www.particle-cosmology-muenster.de

29.03.2024 14:04 — 👍 0 🔁 0 💬 0 📌 0

GWB bringing science closer to the Big Bang

This is the new bluesky account of Particle Cosmology Münster!
We focus our research on fields in physics that can bring us closer than ever to the Big Bang 🌌
A highly promising tool to gain insight into the early universe are primordial gravitational waves.

29.03.2024 13:48 — 👍 4 🔁 1 💬 0 📌 0

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