Tootfinder

$\mathcal{B}(B\rightarrow\tau\nu)$ measurement with the hadronic FEI at Belle~II
Giovanni Gaudino
https://arxiv.org/abs/2506.03000 https://

$\mathcal{B}(B\rightarrowτν)$ measurement with the hadronic FEI at Belle~II
We presented at Moriond EW 2025 a measurement of the branching fraction of $B\toτν$ decays using $(387\pm 6) \times 10^6$ $Υ(4S)$ collected between 2019 and 2022 with the Belle~II detector at the SuperKEKB $e^+e^-$ collider. We reconstruct the accompanying $B^-$ meson using the hadronic tagging method, while $B\toτν$ candidates are identified in the recoil. We find evidence for $B\toτν$ decays at 3.0 standard deviations, including systematic uncertainties. The measured branching fraction…

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#KidsMakeUpTheRules

Krugman outlines a constellation of possible causes around a core theme: extreme uncertainty.
“What does a business do in the face of this kind of uncertainty? It tries to avoid making commitments that it may soon regret.”
Krugman tries to tie it all to Trump’s recent actions, which is dubious: the post-college job market has been crap since 2022 or 2023; Krugman’s own graph suggests it started worsening circa 2018. The larger theme of uncertainty, however, fits that timeframe.

« Des soldats nous ont dit de nous déshabiller » : en Ethiopie, le silence sur les viols de masse commis pendant la guerre au Tigré
https://www.lemonde.fr/afrique/article/202…

« Des soldats nous ont dit de nous déshabiller » : en Ethiopie, le silence sur les viols de masse commis pendant la guerre au Tigré
Entre 2020 et 2022, 120 000 femmes ont été victimes de viols dans cette région en proie à une rébellion. La réticence des autorités, aussi bien fédérales que régionales, à ouvrir les yeux sur ce fléau, entrave le processus de reconstruction des victimes.

Truthful, Credible, and Optimal Auctions for Matroids via Blockchains and Commitments
Aadityan Ganesh, Qianfan Zhang
https://arxiv.org/abs/2507.04592 https…

Truthful, Credible, and Optimal Auctions for Matroids via Blockchains and Commitments
We consider a revenue-optimizing auctioneer in single-dimensional environments with matroid feasibility constraints. Akbarpour and Li (2020) argue that any revenue-optimal, truthful, and credible mechanism requires unbounded communication. Recent works (Ferreira and Weinberg, 2020; Essaidi et al., 2022; Chitra et al., 2024) circumvent their impossibility for the single-item setting through the use of cryptographic commitments and blockchains. We extend their results to matroid feasibility const…