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๐Ÿ” philipp koppe ๐Ÿ“‚ Physics
Showing 457 results for "philipp koppe" in Physics
Physics Preprint PDF DOI

Big Dipper, Help Me Find A Way -- Dip-hunting at hadron colliders

Diego A. Baron Moreno, Christoph Englert, Yvonne Peters ยท 2026

Destructive interference between signal and background processes poses a fundamental challenge in searches for top-philic scalar resonances, significantly reducing experimental sensitivity to well-motโ€ฆ

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Physics Preprint PDF DOI

Discovery of low-redshift analogues to "Little Red Dots" in DESI: A later evolutionary stage of compact LRDs?

Weiyu Ding, Xu Kong, Wei-Jian Guo, Hu Zou, Jialai Wang, Fujia Li, Hongxin Zhang, Jie Song, Jingyi Zhang, Niu Li, Wen-Xiong Li ยท 2026

The James Webb Space Telescope (JWST) has recently discovered a population of compact, red sources at z > 4 known as "Little Red Dots" (LRDs). They are characterized by their V-shaped continuum spectrโ€ฆ

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Physics Preprint PDF DOI

DREAMuS: Dark matter REsearch with Advanced Muon Source

Xiang Chen, Zejia Lu, Liangwen Chen, Jun Gao, Shao-Feng Ge, Zhanxu Hao, Yang Hu, Bingzhi Li, Cen Mo, Zhiyu Sun, Huayang Wang, Chonghao Wu, Yu Xu, Xueheng Zhang, Yulei Zhang, Liang Li ยท 2026

We propose DREAMuS, a fixed-target experiment at the High Intensity Heavy-Ion Accelerator Facility (HIAF), to search for muon-philic dark matter mediated by light flavor-violating bosons. DREAMuS is dโ€ฆ

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Physics Preprint PDF DOI

Machine Learning-Based Classification of Active Galaxies and Estimation of Supermassive Black Hole Masses

Farideh Mazoochi, Reihaneh Karimi, Mohammad Hossein Zhoolideh Haghighi, Fatemeh Tabatabaei ยท 2026

Distinguishing active galaxies from star-forming galaxies is essential for understanding galaxy evolution. Diagnostic methods like the BPT (Baldwin, Phillips, and Terlevich) diagram use optical emissiโ€ฆ

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An analytical criterion for significant runaway electron generation in activated tokamaks

Bjorn Zaar, Istvan Pusztai, Ida Ekmark, Tunde Fulop ยท 2026

A disrupting plasma in a high-performance tokamak such as ITER or SPARC may generate large runaway electron currents that, upon impact with the tokamak wall, can cause serious damage to the device. Toโ€ฆ

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Physics Preprint PDF DOI

Kalb-Ramond Topological Term in Majorana Superspace and Kaluza-Klein Spectrum Deformation in Five Dimensions

L. A. S. Nunes, C. A. S. Almeida ยท 2026

We construct the supersymmetric extension of the Kalb-Ramond topological term in an intrinsic $N=1$, $D=5$ superspace based on Majorana spinor coordinates. This formalism is a Majorana-basis implementโ€ฆ

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A New Identification Method and Sample of Counter-Rotating Disk Galaxies in SDSS-IV MaNGA DR17

Maxwell Piper, Alison Crocker ยท 2026

Counter-Rotating Disk (CRD) galaxies have two co-spatial stellar disks rotating in opposite directions, and provide a rare opportunity to study external gas accretion and dynamical assembly processes.โ€ฆ

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A Faint Progenitor System for the Faint Supernova 2024vjm

Erez A. Zimmerman, Avishay Gal-Yam, Paul J. Groot, Eran O. Ofek, Jan van Roestel, Andrea Pastorello, Stefano Valenti, Aravind P. Ravi, Ping Chen, Steve Schulze, Nadejda Blagorodnova, Maxime Wavasseur, Marco A. Gomez-Munoz, Hugo Tranin, Simon de Wet, Giorgos Leloudas, Paul M. Vreeswijk, Lindsey A. Kwok, Michaela Schwab, Saurabh W. Jha, Kate Maguire, David J. Sand, Eric Stringer, Thomas Kupfer, Tamar Faran, Joseph P. Anderson, Jennifer Andrews, Moira Andrews, Avshalom Badash, Steven Bloemen, K. Azalee Bostroem, Ting-Wan Chen, Massimo Della Valle, Georgios Dimitriadis, Yize Dong, Joseph R. Farah, James H. Gillanders, Benjamin Godson, Mariusz Gromadzki, Daichi Hiramatsu, Emily Hoang, D. Andrew Howell, Daryl Janzen, Hanindyo Kuncarayakti, Jiaxuan Li, Joseph D. Lyman, Keiichi Maeda, Mark R. Magee, Curtis McCully, Darshana Mehta, Andrew Milligan, Shane Moran, Yuan Qi Ni, David O'Neill, Jeniveve Pearson, Danielle L. A. Pieterse, Giuliano Pignata, Andrea Reguitti, Daniel E. Reichart, Nicolas Meza Retamal, Rita P. Santos, Simone Scaringi, Manisha Shrestha, Shubham Srivastav, Fiorenzo Stoppa, Bhagya Subrayan, Giorgio Valerin, Xiaofeng Wang, Kathryn Wynn, Ofer Yaron, Weicheng Zang ยท 2026

Type Ia Supernovae (SNe Ia) are well known for their role as standardizable cosmological candles. Their uniformity is credited to their single origin as thermonuclear explosions of White dwarf (WD) stโ€ฆ

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New techniques to investigate the AGN-SF connection with integral field spectroscopy

Aman Chopra, Henry R. M. Zovaro, Rebecca L. Davies ยท 2026

Understanding the connection between active galactic nuclei and star-formation (the AGN-SF connection) is one of the longest standing problems in modern astrophysics. In the age of large Integral Fielโ€ฆ

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Search for Physics beyond the Standard Model in four- and three-top quark production

Maryam Shooshtari (for the CMS Colaboration) ยท 2026

A reinterpretation of four-top quark ($t\bar{t}t\bar{t}$) production is presented using the full Run 2 dataset recorded by the CMS experiment, corresponding to an integrated luminosity of 138 fb$^{-1}โ€ฆ

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Lattice Boltzmann methods for simulating non-Newtonian fluids: A comprehensive review

Vedad Dzanic, Qiuxiang Huang, Christopher S. From, Emilie Sauret ยท 2026

Non-Newtonian fluids encompass a large family of fluids with additional nonlinear material properties, contributing to non-trivial flow behaviour that cannot be captured through a single constant viscโ€ฆ

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A catalogue of Type 2 active galactic nuclei in the 6dF Galaxy Survey

Sruthi Suresh, Wei Jeat Hon, Rachel L Webster, Christian Wolf, Christopher A Onken ยท 2026

Active galactic nuclei (AGNs) are the compact, energetic central regions of galaxies, powered by supermassive black holes that accrete surrounding gas and dust. Their optical spectra can be identifiedโ€ฆ

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A short technical comment on Bub's There is No Quantum World (arXiv:2512.18400v2) and a brief remark on related Grangier's reply (arXiv:2512.22965v1)

Krzysztof Sienicki ยท 2025

This note is a friendly technical check of Jeffrey Bub's There is No Quantum World (arXiv:2512.18400v2). I flag one unambiguous mathematical slip (a cardinality identity that implicitly assumes the Coโ€ฆ

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Chemical evolution of bulges of active galactic nuclei in the early Universe: roles of accreting stars

Shuo Zhai, Jian-Min Wang, Yan-Rong Li, Wei-Jian Guo, Gang Zhao ยท 2025

JWST/NIRCam observations reveal dense stellar cores in high-redshift galactic bulges, indicative of sustained star formation and potential stellar accretion. We introduce accretion-modified star (AMS)โ€ฆ

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A Fractional Calculus Framework for Open Quantum Dynamics: From Liouville to Lindblad to Memory Kernels

Bo Peng, Yu Zhang ยท 2025

Open quantum systems exhibit dynamics ranging from unitary evolution to irreversible dissipation. While the Gorini--Kossakowski--Sudarshan--Lindblad (GKSL) equation uniquely characterizes Markovian CPโ€ฆ

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The influence of AGN feedback on star formation in red spiral galaxies

Moreom Akter, Wayne A. Barkhouse, Sandanuwan P Kalawila Vithanage, Gihan L. Gamage, Omar Lopez-Cruz ยท 2025

We investigated the influence of Active Galactic Nuclei (AGN) feedback on star formation in red spiral galaxies by analyzing a sample of 324 red and 273 blue face-on spirals selected from 115 low-redsโ€ฆ

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Dual core system candidates: a sample of objects with large velocity offset between absorption and narrow emission lines

Zheng Qi, Zhang Xueguang, Yuan Qirong ยท 2025

We present a sample of 28 objects at z<0.3 from Data Release 16 of the Sloan Digital Sky Survey (SDSS DR16) with large velocity offset (> 200 km/s) of narrow H$\beta$ and H$\alpha$ emission lines relaโ€ฆ

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Large N limit of spectral duality between the classical XXX spin chain and the rational reduced Gaudin model

R. Potapov ยท 2025

We study the large $N$ limit of the spectral duality between the classical $\mathfrak{gl}_M$ XXX spin chain and the $\mathfrak{gl}_N$ trigonometric Gaudin model in its rational reduced form. The infinโ€ฆ

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MKS 390 Micro-Ion Gauge Performance After Exposure to High Pressures

Brandon Massett, Walter Shmayda ยท 2025

In certain applications, pressure transducers may be exposed to high pressures either deliberately or accidentally, raising concerns about their functionality afterwards. We compared the performance oโ€ฆ

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Constraining $A\to ZH$ with $H\to t\bar t$ in the Low-Mass Region

Saiyad Ashanujjaman, Guglielmo Coloretti, Andreas Crivellin, Siddharth P. Maharathy, Bruce Mellado ยท 2025

The decay $A\to ZH$ is a characteristic signal of two-Higgs-doublet models (2HDMs), where $A$ and $H$ lie primarily within the same $SU(2)_L$ multiplet, leading to a coupling of order $g_2$ to the $Z$โ€ฆ

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