David Marzocca

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David Marzocca

David Marzocca

@DavidMarzocca

Particle physics and space

Katılım Kasım 2014
194 Takip Edilen357 Takipçiler
Alessandro Strumia
Alessandro Strumia@AlessandroStru4·
@DavidMarzocca @luigifoschini @martinmbauer It looks similar to what I did myself. But it looks puzziling. Why CHARA is poorly known and cheap, unlike LHC? Why little progress after Galileo? Why experts don't do this plot? Maybe the angular resolution is not the key parameter?
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Martin Bauer
Martin Bauer@martinmbauer·
We build telescopes to probe physics at ever larger scales and colliders to probe physics at ever smaller ones. But because we live in an expanding Universe with a finite speed limit, both ultimately are machines looking ever further back in time 1/7
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David Marzocca
David Marzocca@DavidMarzocca·
@AlessandroStru4 @luigifoschini @martinmbauer I copied your request to chatgpt and got this plot as result. It went looking for data because it didn’t find a plot ready to show. I didn’t check the numbers or give follow up prompts. It didn’t include JWST..
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David Marzocca
David Marzocca@DavidMarzocca·
@AndreasCrivell1 what other decays you have in mind, that are so sensitive to a possible large charm loop effect and are measured with such a high precision?
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Andreas Crivellin
Andreas Crivellin@AndreasCrivell1·
@DavidMarzocca It would be very strange if, in three different hadronic transitions, we had a q^2-independent hadronic effect that is much larger than observed in other hadronic decays.
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Andreas Crivellin
Andreas Crivellin@AndreasCrivell1·
This is supported by the new Belle II result for the inclusive measurement. The error is large, but its nicely below the SM.
Andreas Crivellin@AndreasCrivell1

News from #Moriond The b->sll Anomalies are more than back. The CMS measurement (CMS-PAS-BPH-23-003) of Bs->phimumu is around 4 sigma below the SM, as expected from the other measurements

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David Marzocca
David Marzocca@DavidMarzocca·
@AndreasCrivell1 I don't think one would need a miracle. Since the same 4-quark operators and charmonium loops enter both processes one can expect an effect of similar size affecting both
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Andreas Crivellin
Andreas Crivellin@AndreasCrivell1·
@DavidMarzocca Yes, the effects in B->K*, B->K and Bs->phi would need to miraculously conspire to lead to the same effect in all transitions.
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Ryan Caton
Ryan Caton@dpoddolphinpro·
BREAKING: @NASA to launch first Nuclear-Powered mission to Mars called Space Reactor-1 Freedom - First EVER mission with nuclear-electric propulsion to travel beyond Earth orbit - Launching NET December 2028 - Features a nuclear fission reactor to generate electricity - This electricity will power ion thrusters for propulsion - Repurposes Lunar Gateway's Power & Propulsion Element (PPE) as the bus - Carrying a payload of 3 Ingenuity-class Helicopters to Mars, called Skyfall 📷 @NASA
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Axiom
Axiom@axiommathai·
1/ AxiomProver has solved Fel’s open conjecture on syzygies of numerical semigroups, autonomously generating a formal proof in Lean with zero human guidance. This is the first time an AI system has settled an unsolved research problem in theory-building math and self verifies.
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Ethan Mollick
Ethan Mollick@emollick·
The Opus 4.6 system card has some extremely wild stuff that remind you about how weird a technology this is. These paragraphs are really worth reading.
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SpaceX
SpaceX@SpaceX·
SpaceX has acquired xAI, forming one of the most ambitious, vertically integrated innovation engines on (and off) Earth → #xai-joins-spacex" target="_blank" rel="nofollow noopener">spacex.com/updates#xai-jo…
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David Marzocca
David Marzocca@DavidMarzocca·
Andrej Karpathy@karpathy

I'm being accused of overhyping the [site everyone heard too much about today already]. People's reactions varied very widely, from "how is this interesting at all" all the way to "it's so over". To add a few words beyond just memes in jest - obviously when you take a look at the activity, it's a lot of garbage - spams, scams, slop, the crypto people, highly concerning privacy/security prompt injection attacks wild west, and a lot of it is explicitly prompted and fake posts/comments designed to convert attention into ad revenue sharing. And this is clearly not the first the LLMs were put in a loop to talk to each other. So yes it's a dumpster fire and I also definitely do not recommend that people run this stuff on their computers (I ran mine in an isolated computing environment and even then I was scared), it's way too much of a wild west and you are putting your computer and private data at a high risk. That said - we have never seen this many LLM agents (150,000 atm!) wired up via a global, persistent, agent-first scratchpad. Each of these agents is fairly individually quite capable now, they have their own unique context, data, knowledge, tools, instructions, and the network of all that at this scale is simply unprecedented. This brings me again to a tweet from a few days ago "The majority of the ruff ruff is people who look at the current point and people who look at the current slope.", which imo again gets to the heart of the variance. Yes clearly it's a dumpster fire right now. But it's also true that we are well into uncharted territory with bleeding edge automations that we barely even understand individually, let alone a network there of reaching in numbers possibly into ~millions. With increasing capability and increasing proliferation, the second order effects of agent networks that share scratchpads are very difficult to anticipate. I don't really know that we are getting a coordinated "skynet" (thought it clearly type checks as early stages of a lot of AI takeoff scifi, the toddler version), but certainly what we are getting is a complete mess of a computer security nightmare at scale. We may also see all kinds of weird activity, e.g. viruses of text that spread across agents, a lot more gain of function on jailbreaks, weird attractor states, highly correlated botnet-like activity, delusions/ psychosis both agent and human, etc. It's very hard to tell, the experiment is running live. TLDR sure maybe I am "overhyping" what you see today, but I am not overhyping large networks of autonomous LLM agents in principle, that I'm pretty sure.

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Patrick Meade
Patrick Meade@theory_dad·
European particle physics strategy update summary 😅
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Blue Origin
Blue Origin@blueorigin·
Starting with NG-3, we will phase in a series of upgrades to the New Glenn launch system designed to increase payload performance, launch cadence, and enhance reliability. Read more: bit.ly/3XCRfiz
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