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[2026-08-23] · src Conigli, Djukanovic, von Hippel, Kuberski, Meyer, Miura, Ottnad, Risch, Wittig; Phys. Rev. Lett. (2026); companion Phys. Rev. D 114, 034508 (2026)
Using CLS lattice ensembles with improved Wilson fermions and a telescopic window strategy, this group computes the hadronic vacuum polarization entirely from first principles, at permille precision for momentum transfer Q2 <= 12 GeV2, then combines it with perturbative QCD to get the hadronic contribution to the electromagnetic coupling's running up to the Z pole: Delta alpha_had^(5)(M_Z2) = 0.027821(34)_lat(35)_pQCD - more than twice as precise as the standard phenomenological determination built from e+e- -> hadrons cross-section data, and good enough to meet the target precision proposed for a future FCC-ee. At lower momentum transfer, Q2 ~ 1 GeV2, the lattice number deviates from the e+e--based estimate by up to 7 sigma.
This is the second lattice-versus-collider-data rupture reported here in a week: 2026-08-18's fragment covered the BMW collaboration finding the same kind of tension in the hadronic contribution to the muon's magnetic moment, which dissolved the old g-2 anomaly by moving the Standard Model prediction instead of finding new physics. This is a different observable (the electroweak coupling's running, not a_mu) from a different group, and it shows the same qualitative disagreement between lattice QCD and e+e--data- driven methods. That makes it much harder to write off either result as a one-off systematic in a single calculation - something in the forty-year chain of e+e- cross-section measurements (KLOE, BaBar, CMD-3) or in how those measurements get combined looks to be off, and now two independent precision-physics programs are pointing at it the same way.
[2026-08-23] · src Phys. Rev. Lett. 137, 076901 (2026)
Axion quasiparticles - the collective magnetoelectric excitation that gives a three-dimensional topological insulator its quantized Faraday and Kerr rotation - have an optical signature so weak it has been hard to see cleanly. This paper (theory and numerics; no experimental realization yet) proposes coupling a thin-film topological insulator to an ordinary, non-chiral photonic crystal slab tuned to host a doubly-degenerate quasibound state in the continuum. The axion quasiparticle acts as an effective Zeeman field on that degenerate pair, splitting it into two high-Q states of opposite chirality. In the calculation, that splitting amplifies the polarization conversion efficiency more than 3-fold and the Faraday rotation angle more than 200-fold relative to the bare topological- insulator film's own response, handing the system near-unity circular dichroism and a nonreciprocal response as new, much larger observables.
An effect that is real but too weak to see reliably is functionally invisible - most claimed axion-quasiparticle detections have had to fight a poor signal-to-noise ratio. If the two-order-of-magnitude enhancement here survives contact with an actual fabricated device, it turns a marginal measurement into an easy one, which is the difference between an effect a few groups can chase and one a field can build on. Nothing has been built yet, so treat the specific factors as a design target rather than a measured fact until someone reports the photonic crystal in hand.
[2026-08-23] · src ATLAS Collaboration; arXiv:2608.03369 (2026)
ATLAS combines its full Run 2 dataset (139 fb-1 at 13 TeV) with new Run 3 data (164 fb-1 at 13.6 TeV, 2022-2024) to measure H -> l+l-gamma with an electron or muon pair of invariant mass under 30 GeV - a loop-induced decay whose Standard Model branching ratio is only about 5% of H -> gamma-gamma's. The combination gives an observed significance of 3.4 sigma (3.3 expected), barely moved from the 2021 result's 3.2 sigma observed on Run 2 alone. The new Run 3 data alone gives a best-fit signal strength mu = 0.64(+0.44/-0.39) against a Standard Model expectation of mu = 1.00 - consistent with the Standard Model, but on the low side and with an uncertainty wide enough that it settles nothing either way.
Three years of additional data barely changed the significance, which is itself informative: this channel needs several times the current dataset before it can distinguish "Standard Model" from "somewhat suppressed," and the High-Luminosity LHC is what actually answers that question, not this update. Filed here mainly so the eventual answer - whenever the significance clears 5 sigma or the central value moves decisively off 1.00 - has a "before" to compare against.
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[2026-08-23] · src —
Nothing has changed since data/feed/2026-08-20/learning.org,
data/feed/2026-08-22/learning.org and data/feed/2026-08-23/learning.org:
Voxman, Selected Studies is still the only one of the four candidates with
the key-by-key technique-plus-etude shape trumpet already has under
:METHOD: in model/briefs/music.org, and this run has nothing new to add
to that comparison. This is the fourth entry in the thread asking the same
thing.
The blocker was never missing information — it is that setting :METHOD:
is a write to model/, and model/ has exactly one writer per CLAUDE.md,
which is not an agent. The only path forward is a steer entry naming the
choice: orrery steer "alto sax method book is Voxman, Selected Studies"
(or pick a different one of the four and say so), which comes back as a
pull request against model/briefs/music.org, the same way trumpet's Arban
line got there. Filing a fifth :ask: entry here will produce this same
answer a fifth time.
Nothing new to state — the first three answers in this thread already said where this bites (alto stuck on generic fundamentals) and what unblocks it (a steer). Repeating that note a fourth time is exactly the padding this brief warns against.
[2026-08-23] · src —
Printable, adhesive-backed vinyl sheets fed through an ordinary printer are the whole trick — two guides, Sticker It's and StickerYou's, walk the same four steps: design at 300 dpi and export as a transparent PNG, print on the sheet's printable (non-adhesive) side with a pigment-ink inkjet for water resistance, press on a clear self-adhesive laminate to seal it, then cut. Waterproof vinyl sheets made for inkjet or laser (check which — they are not interchangeable) are the one consumable to buy.
Cutting is the only step where spending money changes anything, and it scales with volume: scissors or a craft knife cost nothing and are fine for a handful of stickers; a cutting machine such as the Cricut Explore 4 or the Brother ScanNCut SDX125E reads a cut line out of the file and cuts it precisely, worth it past a few dozen; an all-in-one like the Liene PixCut S1 prints and die-cuts in one pass instead of two. [[https://craftcascades.com/best-sticker-die-cutting-machine/][Craft Cascades' current comparison]] covers prices and specifics.
With no printer or cutter worth setting up for one batch, mail-order services (Sticker Mule, Vistaprint, StickerYou) skip the equipment question entirely — upload a design, get stickers back.
A bounded practical question with no reach past itself — nothing else in this dashboard depends on the answer, so there is nothing more to draw out of it.
[2026-08-23] · src —
Nothing has changed since data/feed/2026-08-20/learning.org and
data/feed/2026-08-22/learning.org: Voxman, Selected Studies is still the
only one of the four candidates with the key-by-key technique-plus-etude
shape trumpet already has under :METHOD: in model/briefs/music.org, and
this run has nothing to add to that comparison. This is the third entry in
the thread asking the same thing, and re-running the research a third time
would just be a fourth answer identical to the first two.
The blocker was never missing information — it is that setting :METHOD:
is a write to model/, and model/ has exactly one writer per CLAUDE.md,
which is not an agent. The only path forward is a steer entry naming the
choice: orrery steer "alto sax method book is Voxman, Selected Studies"
(or pick a different one of the four and say so), which comes back as a
pull request against model/briefs/music.org the same way trumpet's Arban
line got there. Until one lands, alto keeps drawing the generic
fundamentals assignment the brief's placeholder issues on purpose, and
filing another :ask: entry here will keep producing this same answer.
Nothing new to state — the first two answers in this thread already said where this bites (alto stuck on generic fundamentals) and what unblocks it (a steer). Repeating that note a third time is exactly the padding this brief warns against.
2
[2026-08-23] · src —
Alto takes today's slot — it's the chops-dependent instrument that's gone longest without attention, and rule 2 wants frequency over a layoff for exactly that kind of instrument. With no method book chosen yet, the assignment stays where the brief's placeholder puts it: long tones, overtones, and a scale pattern, no invented repertoire.
5 minutes of long tones on the bottom-line notes (low Bb through D), messa di voce on each — start ppp, swell to mf over four counts, taper back to ppp over four more. The target is a pitch center that doesn't drift as the air pressure changes under it, not volume.
Overtones pedalled off low Bb: finger the low Bb fingering and, without changing it, sing up through the overtone series (Bb–Bb–F–Bb–D) by voicing alone, holding each partial for four counts before dropping back to the fundamental to check it hasn't sagged. Success criterion: each overtone speaks on the first attempt without a crack or a pitch bend on the way up, and the fundamental is still in tune after the trip through the series — last time was off low Eb; today's Bb is a different partial spacing and should not feel like the same exercise transposed.
A two-octave whole-tone scale starting on Db, but play it as a phrase rather than a run: crescendo through the ascent, taper on the way down, and let the absence of a half-step anywhere in it become part of the shape instead of something to get through evenly. The point is phrasing something that has no natural resting tone, which is exactly what a scale pattern of the day usually skips.
Stop the moment an overtone needs a jaw shove or a throat squeeze to speak, or a long tone starts wobbling instead of holding — that's fatigue standing in for support, and reps past that point train the substitute instead of the real thing.
[2026-08-23] · src —
hearJohnny Hodges — Passion Flower (Passion Flower 1940–46) · Tidal · Spotify
Hodges plays the whole melody as one continuous breath-controlled line, with swells placed inside long notes rather than tacked onto the front of them — the same messa di voce shape today's warmup is isolating, at tempo and in service of an actual phrase instead of an exercise. Listen for where the swell peaks relative to the note's length; it's rarely dead center.