Particle Cosmology Münster (PCM) research group, led by @KaiSchmitzHEP, at the Institute for Theoretical Physics @uni_muensterparticle-cosmology-muenster.de Münster, DeutschlandJoined February 2024
🚨 New PCM paper on the arXiv [ arxiv.org/abs/2408.16538 ]: Schwinger pair production during axion inflation can be relevant for the generation of primordial magnetic fields. We take an in-depth look at this effect and partially find large deviations from earlier treatments.
🚨 New analysis of the @NANOGrav 15-yr data (main contributions from Münster+Warsaw): We introduce the running of the spectral index, constrain it using our data, and discuss parameter bounds that apply if the signal should originate from cosmic inflation: arxiv.org/abs/2408.10166
🚨 New video on the PCM YouTube channel: youtu.be/qrJ7D3_oa2s?si… in which PCM postdoc Sasha Sobol summarizes our recent paper on "Scalar Perturbations from Inflation in the Presence of Gauge Fields": arxiv.org/abs/2404.19694
Impressions of the talks by our participants from the Bielefeld- Münster- Cosmo- Connection! We explored many interesting topics, including parallels in the search of new physics in CMB and GWB and progress on the statistical analysis of parameters in new hypotheses 🌌
Bielefeld-Münster Cosmo Connection 2024, summer edition: two days of talks to update each other on recent activities in Bielefeld and Münster, plus a nice "Flammkuchen" dinner this time. 😋
Really enjoyed the "Frontiers in Cosmology and Gravitational Physics" workshop [ sciama.icg.port.ac.uk/frontiers2024/… ] at the University of Portsmouth! Can you spot me in the picture? 😉
We show that 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!
"We revisit the generation of primordial scalar perturbations during inflation in the presence of gauge fields by (i) taking into account the backreaction of the latter on the background dynamics and (ii) including all possible scalar contributions to the curvature perturbation."
A new paper on 𝐒𝐜𝐚𝐥𝐚𝐫 𝐩𝐞𝐫𝐭𝐮𝐫𝐛𝐚𝐭𝐢𝐨𝐧𝐬 𝐟𝐫𝐨𝐦 𝐢𝐧𝐟𝐥𝐚𝐭𝐢𝐨𝐧 𝐢𝐧 𝐭𝐡𝐞 𝐩𝐫𝐞𝐬𝐞𝐧𝐜𝐞 𝐨𝐟 𝐠𝐚𝐮𝐠𝐞 𝐟𝐢𝐞𝐥𝐝𝐬 is out today by members of the PCM group: Richard von Eckhardstein, Kai Schmitz and Oleksander Sobol. 🎉
arxiv.org/abs/2404.19694
We construct an extension of the SM containing embedded walls inside which electroweak symmetry remains unbroken. Embedded walls are unstable in the vacuum but stabilized by plasma interactions. This can lead to an efficient scenario of 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
Check out the YouTube video as well:
youtu.be/b0JX_ygGlug?si…
Prof. Bayram Tekin from @METU_ODTU in Ankara is visiting us this week, thanks to an @EUErasmusPlus staff mobility agreement for teaching that allows him to give five lectures on "Modified Gravity" at our institute. It's great to have you, Bayram!
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