Tootfinder

Direct Observation of the Lindhard Continuum using Resonant Inelastic X-ray Scattering
Eder G. Lomeli, Sarbajaya Kundu, Yi-De Chuang, Zengqing Zhuo, Ke Chen, Xiaoxing Xi, Lingjia Shen, Georgi L. Dakovski, Stephan Gepr\"ags, Brian Moritz, Thomas P. Devereaux, John Vinson, Matthias F. Kling, Edwin W. Huang, Daniel Jost
https://arxiv.org…

Direct Observation of the Lindhard Continuum using Resonant Inelastic X-ray Scattering
Understanding the excitations of quantum materials is essential for unraveling how their microscopic constituents interact. Among these, particle-hole excitations form a particularly important class, as they govern fundamental processes such as screening, dissipation, and transport. In metals, the continuum of electron-hole excitations is described by the Lindhard function. Although central to the theory of Fermi liquids, the corresponding Lindhard continuum has remained experimentally elusive.…

I recommend visiting, or at least thinking about, /r/spicypillows every so often as a reminder to check on and keep track of all your lithium batteries. 🔥⁠🪫⁠🔥

Self-resonant dark matter with $Z_4$ gauged symmetry
Lucca Radicce Justino, Seong-Sik Kim, Hyun Min Lee, Jun-Ho Song
https://arxiv.org/abs/2509.06728 https://

Self-resonant dark matter with $Z_4$ gauged symmetry
We present a new model for two-component scalar dark matter (DM), consisting of two complex scalar fields. In this model, both the DM components are stable due to the remaining $Z_4$ gauge symmetry, which is the remnant of the $U(1)^\prime$ local symmetry. When the resonance condition for DM masses is fulfilled, we show that the elastic co-scattering processes between two components of dark matter ($u$-channel processes) are enhanced due to the Yukawa potential with a small effective mass for t…

Help requested.
The new MacOS update makes the DVD player (the thing for SuperDrives - surprised they aren't Magic Drives, now that I think about it) janky as hell. This is a well-known issue, according to my perfunctory web searches. Drops to something like 5FPS. Works fine otherwise, but annoying.
Two questions: Does anyone know if this is this likely to be fixed? And if not, and also while we wait, is there a DVD player someone can recommend? VLC needs Rosetta and its UI has always been borderline unusable anyway. Yes, I tried it again, but it switched randomly from German to Spanish and had no navigation menu for the disk itself. I'm looking for something that can read the disk and works like the native DVD player, minus the jank. But maybe the jank is fundamental. That's really what I'm trying to find out.
For now, I'll use a non-updated Mac but I will want to update it at some point. Ironists need not remind me about my recent rant regarding updates.
Thanks all.

Recently reminded of another bit of ridiculous childhood lore: the species of "ooo creatures" who emitted "ooo waves" any time they made the "ooo" sound, which were extremely harmful to another species ("Pets", basically Scooby-Doo complete with the accent) were was constantly being terrorized by the ooo creatures.
Apparently ooo waves were emitted by some kind of resonance in the ooo creature's nose hairs, and pulling their nose hairs would …

Low-probability Tokens Sustain Exploration in Reinforcement Learning with Verifiable Reward
Guanhua Huang, Tingqiang Xu, Mingze Wang, Qi Yi, Xue Gong, Siheng Li, Ruibin Xiong, Kejiao Li, Yuhao Jiang, Bo Zhou
https://arxiv.org/abs/2510.03222

Low-probability Tokens Sustain Exploration in Reinforcement Learning with Verifiable Reward
Reinforcement Learning with Verifiable Rewards (RLVR) has propelled Large Language Models in complex reasoning, yet its scalability is often hindered by a training bottleneck where performance plateaus as policy entropy collapses, signaling a loss of exploration. Previous methods typically address this by maintaining high policy entropy, yet the precise mechanisms that govern meaningful exploration have remained underexplored. Our analysis suggests that an unselective focus on entropy risks amp…

House of Dynamite , recommended movie on Netflix about nuclear war in these times. Realistic, gives an impression how the bureaucracy works and how little time there is to decide. It also gives a good reminder there is no real effective defense against incoming ballistic missiles, at least not for 100%. When interested in the subject, this is also a good book to read, Nuclear War: A Scenario - Wikipedia

Nuclear War: A Scenario - Wikipedia

Criterion for the Existence of the $G(3900)$ Resonance
Yin Huang, Xurong Chen
https://arxiv.org/abs/2509.06353 https://arxiv.org/pdf/2509.06353

Criterion for the Existence of the $G(3900)$ Resonance
About 18 years ago, the BABAR and the Belle Collaborations reported evidence for a new $c\bar{c}$ structure near $3900~\mathrm{MeV}$ in $e^{+}e^{-} \to D\bar{D}$, triggering debate over whether it represents a genuine hadronic state or arises from interference effects and the opening of the $D^{*}\bar{D}$ threshold. The issue remained unsettled until 2024, when BESIII, with an enlarged $e^{+}e^{-} \to D\bar{D}$ sample, confirmed the presence of the $G(3900)$ structure, reviving discussion of it…

Your regular reminder that all Substack newsletters have an RSS feed. That means you don't have to give them an email address for tracking or annoying marketing. Which is especially nice when you want to avoid the platform as much as possible but some good writers insist on publishing there.

I personally use Feedbin as my RSS reader and am happy to recommend it.

A movie recommendation. We found it on Kanopy (courtesy of Vancouver Public Library)
Hit Man 2023 1hr 55min
From director Richard Linklater (Boyhood) comes this romantic crime comedy about mild-mannered professor Gary Johnson (Glen Powell), who moonlights as a fake assassin for the New Orleans police. When he falls for Madison (Adria Arjona), a client desperate to escape her abusive husband, Gary blurs the line between his real self & his deadly alter ego. With each deception…