Oz Amram
@ozamram.bsky.social
Postdoc at Fermilab working on working on particle physics + ML with CMS He/him https://ozamram.github.io/
😮
Elizabeth Gibney@lizziegibney.bsky.social · 8mo agoWow. CERN has secured a promise of $1 billion (!) towards its planned Future Circular Collider from private donors (such as the Breakthrough Prize Foundation & Eric & Wendy Schmidt Fund) - the first such donation for CERN, which has until now been taxpayer funded home.cern/news/press-r... 🧪⚛️
Fleet Foxes lyrics Are somehow very relevant for life in HEP-ex 😂
![Screenshot of lyrics:
[Verse 1]
I was raised up believing
I was somehow unique
Like a snowflake distinct among snowflakes
Unique in each way you'd conceive
And now after some thinking
I'd say I'd rather be
A functioning cog in some great machinery
Serving something beyond me](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:h6mud7tr3q34qd5se4dnvula/bafkreidtajihbn22w5ukbc7hsqcvgqj5vdubsjw5zsgakxppidd7v3dibi)
We had these two striking 8 TeV dijet pairs events in Run 2, resulting in a 3.8sigma local excess Unfortunately haven't seen any in Run3 yet 🫤
CMS Publications@cmspapers.bsky.social · 9mo ago#CMSPAS: Search for resonant production of pairs of dijet resonances in proton-proton collisions at √s = 13.6 TeV (CMS-PAS-EXO-25-004) https://cds.cern.ch/record/2947130 #NewPhysics
CepC proposal will not be included in China’s next 5-year plan cerncourier.com/cepc-matures...
CEPC matures, but approval is on hold – CERN Courier
The Circular Electron–Positron Collider (CEPC), a 100-km electron–positron “Higgs factory” proposed in China, has reached the technical-design stage but will not be included for approval or constructi...
cerncourier.com
Very cool new analysis! Due to the crazy data volume, standard data streams throw away >99.99% of collisions at the LHC But what if we didn't have to? For the first time CMS has performed a search using data processed on hardware in real time (40 million / sec) !
CMS Publications@cmspapers.bsky.social · 11mo ago#CMSPAS: Search for heavy long-lived charged particles with Level-1 Scouting data from proton-proton collisions at √s = 13.6 TeV (CMS-PAS-EXO-25-010) https://cds.cern.ch/record/2943179 #NewPhysics
Great thread!
Dan Garisto@dangaristo.bsky.social · 11mo agoA few years ago, four theorists identified new symmetries in a two Higgs doublet model. These are not intuitive physical symmetries, like reflection over a mirror, but are abstract ways in which the parameters can be transformed and the model preserved. arxiv.org/abs/2306.02410
From the most recent one: "In this letter, we have applied goofy transformations to the SM, thereby also extending them to include the fermion sector. We have shown that all SM interactions are invariant under the appropriate goofy transformations, while the Higgs-mass term is forbidden."
Recently came across a petition for CERN to reconsider its relationship to Israel in light of the ongoing genocide in Gaza 1300+ signatures and counting Encourage all my CERN affiliated colleagues to sign!
Welcome to the September/October edition of #CERNCourier In this edition the future meets the past: the ongoing update to the European Strategy for Particle Physics, the outstanding discoveries of 1964, what may be the last chapter of the quarkonia story and much more. Read more: cerncourier.com
And we're off! Yifan Chen welcomes students to the Machine Learning for Fundamental Physics School 2025!
If you liked the recent CMS anomaly detection search, check out this paper for more details & validations! I particularly like this 'rediscovery' of boosted top quarks with anomaly detection! Left = before AD, right = after AD
CMS Publications@cmspapers.bsky.social · last yr.#CMSPAS: Machine-learning based anomaly detection algorithms for model independent searches (CMS-PAS-MLG-23-002) https://cds.cern.ch/record/2938054
Happy this paper is finally on arxiv! A fun mix of physics (jet substructure) being used to calibrate the performance of ML algorithms (jet taggers) to get proper uncertainties Now a standard CMS tool for interpreting searches for exotic jets, used in multiple analyses
CMS Publications@cmspapers.bsky.social · last yr.#CMSpaper: A method for correcting the substructure of multiprong jets using the Lund jet plane (arXiv:2507.07775) https://arxiv.org/abs/2507.07775 #Jets
🚨Great new Dataset article in #MLST🚨 @kasieczka.bsky.social @mikraemer.bsky.social @ozamram.bsky.social & co-authors ‘prep 180M jets from pp collisions for easy AI training & use them to pre-train a foundation model’ #FoundationModels #ParticlePhysics #OpenData #LHC Paper ➡️ bit.ly/4eE0QO1
Introducing...your sneak peek at the cosmos captured by NSF–DOE Vera C. Rubin Observatory! Can you guess these regions of sky? This is just a small peek...join us at 11am US EDT for your full First Look at how Rubin will #CaptureTheCosmos! 🔭🧪 #RubinFirstLook ls.st/rubin-first-look-livestream
So now it looks g-2, W mass, and R(K) are dead as anomalies Anyone have a favorite alive anomaly? R(D)? X17? (bolstered by recent PADME results 👀) something else??
Scientists for Palestine is holding a school on quantum physics Palestinian students in Jordan in July, but they need donations to make it happen! 🇵🇸 www.scientists4palestine.org/palestinian-... www.gofundme.com/f/support-pa...
Palestinian Advanced Physics School 2025 - Scientists For Palestine
The Palestinian Advanced Physics School 2025 (PAPS) will be held in-person at the University of Jordan between 26th — 31st July 2025. Additional students will join remotely from Gaza. The school is ai...
scientists4palestine.org
Wondered what it would take for AI agents to design and test new theories for fundamental physics, just like a physicist? We show how, an example in neutrino model building! Paper with Jake, Max, Victoria, Jason leading crucial aspects, also @danielwhiteson.bsky.social . arxiv.org/abs/2506.08080
New paper on arXiv today! arxiv.org/abs/2506.06438 Wouldn't it be nice to fit in high dimensions using a data-driven background estimate? By using generative ML models you can! We showcase this on an example di-Higgs measurement, performing a 5D fit, (can probably go higher with more work)
Data-Driven High-Dimensional Statistical Inference with Generative Models
Crucial to many measurements at the LHC is the use of correlated multi-dimensional information to distinguish rare processes from large backgrounds, which is complicated by the poor modeling of many o...
arxiv.org
Paper day! On a new usage of anomaly detection Our idea is to look for resonances produced with interesting other event activity (X), which you identify with one of the anomaly detection methods we have been using for jets arxiv.org/abs/2504.13249
Weakly supervised anomaly detection with event-level variables
We introduce a new topology for weakly supervised anomaly detection searches, di-object plus~X. In this topology, one looks for a resonance decaying to two standard model particles produced in associa...
arxiv.org
CMS is seeing an unexpected excess of top quarks in their data. But what is causing it? Signs are pointing to 'toponium' an unstable bound state of two top quarks, which was previously thought impossible to form! Read more in the newest ParticleBites! www.particlebites.com?p=10001
What collider do early career particle physicists in the US want? We surveyed 100+, check out our input to the European strategy to find out! Short answer : Lots of variety of opinion, but highest enthusiasm for a @muoncollider.bsky.social arxiv.org/abs/2503.22834
CMS has a new result out fresh today for Moriond! "Observation of a pseudoscalar excess at the top quark pair production threshold" Very much looks like the discovery of toponium, a short-lived top - anti-top bound state arxiv.org/abs/2503.22382
There is currently a call for community input to the update of the European Strategy for Particle Physics. Here is one by early career researchers that highlights the importance of career perspectives and talent development when planning large projects over multiple decades: arxiv.org/abs/2503.19862
Early Career Researcher Input to the European Strategy for Particle Physics Update: White Paper
This document, written by early career researchers (ECRs) in particle physics, aims to represent the perspectives of the European ECR community and serves as input for the 2025--2026 update of the Eur...
arxiv.org
It seems like the magnets needed for FCC-hh could be ready by ~2055 (or even earlier) ?! I had thought the magnets were main reason hh couldn't start until ~2070
