High Energy Physics, statistics, data science / @ATLASexperiment @cern / research scientist @datascience_uw & @iris_hep
Joined October 2016
- Tweets94
- Following386
- Followers308
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Alexander Held retweeted
Excited to share the first results using Neural Simulation-Based Inference (NSBI) techniques applied to @ATLASexperiment data! We measure the elusive off-shell Higgs boson with 3.1x better observation sensitivity than standard (histogram) analysis techniques! A thread: (1/N)
Alexander Held retweeted
Physicists at the ATLAS Experiment at @CERN release a new study of the Higgs boson interacting with top quarks! 🔍
Studies of this rare process can give us insight into the origin of mass. Check out our new briefing to more⤵️ atlas.cern/Updates/Briefing/…
Come join us! If you have questions you'd like to ask a potential future colleague, please feel free to get in touch. Lots of interesting topics to work on!
The @KyleCranmer lab at @UWMadison is seeking a postdoctoral research associate to pursue research at the intersection of data science and particle physics. The position could be based either at @CERN or at the Data Science Institute in Madison. datascience.wisc.edu/2024/05…
Alexander Held retweeted
📈More than #OpenData, CMS continues to move towards #OpenScience 💪
🎉The statistical analysis tool used to find the #Higgs boson, along with the full statistical model and the data used to make the measurements are now available to all! 🎉
▶️ cms.cern/.../cms-commitment-…... @CERN
Alexander Held retweeted
Big day today, stay tuned for what's coming over the next couple of days...
#CMSpaper soon on arXiv: The CMS statistical analysis and combination tool: Combine (CERN-EP-2024-078) cds.cern.ch/record/2895097
Alexander Held retweeted
The ATLAS Collaboration celebrates the International Day of #WomenInScience! The collaboration stands with all young women and girls who want to pursue a career in STEM. Here are just some of the women of our collaboration, who are working to push the boundaries of our knowledge.
The pyhf workshop started today, looking forward to a productive week!
Today's the day! The 2023 #pyhf Users and Developers Workshop begins at CERN at 10:00 CET! We're looking forward to a great week of community interaction, discussion, and development. 🚀
indico.cern.ch/e/pyhf-worksh…
I am grateful to @datascience_uw and @iris_hep to get to work on projects I am passionate about with an amazing group of people!
Shoutout to our @datascience_uw postdocs Alex Held @alheld_ & Matthew Feickert @HEPfeickert who work at the intersection of data science and high energy particle physics. Both are @iris_hep leaders engaged with #scikithep, @PyHEPConf & @SciPyConf. #NationalPostdocAppreciationWeek
Alexander Held retweeted
Now that we're back from the break at #PyHEP2022, we have a talk on end-to-end physics analysis with Open Data: the Analysis Grand Challenge by @alheld_. indico.cern.ch/event/1150631… github.com/alexander-held/Py…
Alexander Held retweeted
The call for abstracts and registration for #PyHEP2022 is open! The workshop will be online from 12-16, September 2022, registration is free, and we're excited to share new work in the HEP Python community with you. 🐍 Register now! indico.cern.ch/event/1150631…
Alexander Held retweeted
🚨 !! Hiring !! 🚨I'm excited to open up both Postdoc and PhD positions to work with me @TUM on Physics and ML/Data Science in Particle Physics with the @ATLASexperiment. Please share widely and/or DM me for details!
portal.mytum.de/jobs/wissens…
portal.mytum.de/jobs/wissens…
Alexander Held retweeted
Test of lepton universality in beauty quark decays arxiv.org/abs/2103.11769. The Standard Model predicts identical electroweak interaction strengths for electron, muon and tau. The result R_K = 0.846+0.044-0.041 constitutes evidence for lepton flavour violation.
Looking for a postdoc position on the @ATLASexperiment? Come work with us at NYU!
Job Announcement: We have 2 postdoc openings in our group working on the @ATLASexperiment at the LHC. We have a strong focus on statistics, ML, analysis preservation and reinterpretation applied to SUSY, Exotics, & Higgs, and EFT
apply.interfolio.com/82481
physics.nyu.edu/experimental…
I just completed all 25 days of Advent of Code 2020! adventofcode.com/ #AdventOfCode
First time finishing all puzzles for me, thanks for the great event! All my solutions are at github.com/alexander-held/ad….
Alexander Held retweeted
On Thursday February 27 members of @iris_hep got together at Princeton University to take stock of our progress in the first 18 months and plan for the future. The event included a poster session.
We've uploaded the 30 posters here:
indico.cern.ch/event/894127/
Earlier this year, @ATLASexperiment publicly released its first full likelihoods from an analysis. The article below highlights this important milestone towards more #opendata:
What if you could test a new theory against LHC data? Better yet, what if the expert knowledge needed to do this was captured in a convenient format?
With the new #openrelease of likelihoods from the ATLAS Experiment, this is now a reality! Learn more: atlas.cern/updates/atlas-new…
Alexander Held retweeted
In our newest paper we discuss the frontier of simulation-based inference (aka likelihood-free inference) for a broad audience. We identify three main forces driving the frontier including: #ML, active learning, and integration of autodiff and probprog.
arxiv.org/abs/1911.01429
Alexander Held retweeted
New paper describing our software tool: MadMiner: Machine learning-based inference for particle physics.
With Johann Brehmer, Felix Kling, and Irina Espejo #HEPML
arxiv.org/abs/1907.10621
