Notices by Stephen Sekula (steve@chirp.cooleysekula.net)

Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Sunday, 26-Mar-2023 19:30:20 UTC Stephen Sekula

Hello, Toronto! So nice to be here again. https://chirp.cooleysekula.net/attachment/70ae5002fd90b9ada465063d5d1543be6a2de9257a3ec3137f29242831dc60c9/view
In conversation about 17 hours ago from NavierStokesApp permalink
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1. fefe0451cbf2660c.webp
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Sunday, 26-Mar-2023 18:00:20 UTC Stephen Sekula

Not long now to Toronto. Lovely day for the drive. https://chirp.cooleysekula.net/attachment/19c814d6da96038207d4692794701616e5a8f71d9bd61616bcaed4d50bd6e1a1/view
In conversation about 19 hours ago from NavierStokesApp permalink
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1. 54e2fa81e8e9ced9.webp
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Sunday, 26-Mar-2023 16:00:20 UTC Stephen Sekula

It is just so lovely up here. https://chirp.cooleysekula.net/attachment/cd6a5c2ac908a97158bef34f2c29d097f098deb8dfa3bfc1602c4388b8fa18f3/view
In conversation about 21 hours ago from NavierStokesApp permalink
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1. 7f7d5fc9d7d59f49.webp
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Sunday, 26-Mar-2023 15:45:20 UTC Stephen Sekula

On the road to Toronto! Nice to be road tripping for this phase of the week. https://chirp.cooleysekula.net/attachment/52296d0e2c604c50ee6b401a93ddc0a7be26f2b81e5ca54dae3ffd94af83e62e/view
In conversation about 21 hours ago from NavierStokesApp permalink
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1. 8d7f42430663d54d.webp
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Sunday, 26-Mar-2023 12:55:18 UTC Stephen Sekula

Excited about heading to Toronto for the SNOLAB Experiment Advisory Committee and the SNOLAB Experiment Forum meetings this week! These bi-annual meetings are an important way to review projects and the lab and take input on a range of issues, to aid in planning future action and activities. I wish everyone safe travels as we work to gather in Toronto.

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Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Sunday, 26-Mar-2023 01:40:23 UTC Stephen Sekula

From CanLightSource https://twitter.com/CanLightSource on Twitter: 2023 International Accelerator School: The CLS, in collaboration with @TRIUMFLab @CERN, is hosting the IAS in Saskatoon from July 10-20. Graduate students, post-doctoral fellows, and laboratory employees will benefit from the course. Apply now: https://indico.lightsource.ca/event/6/ https://twitter.com/CanLightSource/status/1639297042664296450/photo/1 https://chirp.cooleysekula.net/attachment/59398c2a0cb0cf576a2aa650a8960e73e5e64d241e5ca894c798798a4922c7ce/view
In conversation about a day ago from NavierStokesApp permalink
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  https://twitter.com/CanLightSource
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  https://twitter.com/CanLightSource/status/1639297042664296450/photo/1
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Saturday, 25-Mar-2023 20:35:17 UTC Stephen Sekula

Thanks to This Week in Google for this moody mellow little gem: https://www. lofiatc.com/?icao=CYYZ
In conversation about 2 days ago from NavierStokesApp permalink
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Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Saturday, 25-Mar-2023 20:05:21 UTC Stephen Sekula

From SNOLABscience https://twitter.com/SNOLABscience on Twitter: Thanks so much to @JillDunlop1 for recognizing SNOLAB science and people in #OntarioBudget2023 ! @profcooley #OntarioBudget #ontpoli https://twitter.com/SNOLABscience/status/1639481521965867013/photo/1 https://chirp.cooleysekula.net/attachment/1c653c2c5b50fa3f40fd319ae231afd6298caf8e67093f65ac5dcd5b50c6dd75/view
In conversation about 2 days ago from NavierStokesApp permalink
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  https://twitter.com/SNOLABscience/status/1639481521965867013/photo/1
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Saturday, 25-Mar-2023 19:25:19 UTC Stephen Sekula

This weather got AWESOME. https://chirp.cooleysekula.net/attachment/6fde5727b61c6503757b7567fb47fc3447555a55d28e727b65166a39c7bda70f/view
In conversation about 2 days ago from NavierStokesApp permalink
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1. 5d21cc2382a4e187.mp4
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Saturday, 25-Mar-2023 17:30:18 UTC Stephen Sekula

Our website got hacked thanks to one area running a dated version of some software. The site has been restored from a reliable backup that pre-dates the attack and a cleanup of older areas of the site has been done to eliminate weaknesses like this.

In conversation about 2 days ago from NavierStokesApp permalink
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Saturday, 25-Mar-2023 11:20:21 UTC Stephen Sekula

Good morning, Sudbury! A glorious sunrise today, with exciting snowy weather to follow. https://chirp.cooleysekula.net/attachment/bae28a824b42b3015c6784998a2854c60b76512a7a38fc702e07f6f890eaf33d/view
In conversation about 2 days ago from NavierStokesApp permalink
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1. a071c2297a247b82.webp
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Saturday, 25-Mar-2023 00:01:45 UTC Stephen Sekula

From CERN https://twitter.com/CERN on Twitter: Today at the #Moriond conference, the @ATLASexperiment & @CMSExperiment have both reported the observation of a rare phenomenon: the simultaneous production of four top quarks, which could hold the key to physics beyond the #StandardModel. Find out more: https://home.cern/news/news/physics/atlas-and-cms-observe-simultaneous-production-four-top-quarks https://twitter.com/CERN/status/1639268947697573894/photo/1 https://chirp.cooleysekula.net/attachment/3a6d208bdf32465f9a28181c3220a28582dd86e7b07f5bc18ff31bada18bc474/view
In conversation about 3 days ago from NavierStokesApp permalink
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  from Twitter
  
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3. ATLAS and CMS observe simultaneous production of four top quarks
  
  Today, at the Moriond conference, the ATLAS and CMS collaborations have both presented the observation of a very rare process: the simultaneous production of four top quarks. They were observed using data from collisions during Run 2 of the Large Hadron Collider (LHC). Both experiments’ results pass the required five-sigma statistical significance to count as an observation – ATLAS’s observation with 6.1 sigma, higher than the expected significance of 4.3 sigma, and CMS’s observation with 5.5 sigma, higher than the expected 4.9 sigma – making them the first observations of this process. The top quark is the heaviest particle in the Standard Model, meaning it is the particle with the strongest ties to the Higgs boson. This makes top quarks ideal for looking for signs of physics beyond the Standard Model. There are a variety of ways to produce a top quark. Most commonly, they are observed in quark and antiquark pairs, and occasionally on their own. According to Standard Model theory, four top quarks – consisting of two top quark–antiquark pairs – can be produced simultaneously. The rate of production is, however, predicted to be 70 thousand times lower than that of top quark–antiquark pairs, which makes four-top-quark production elusive. Evidence for this phenomenon has previously been found by ATLAS in 2020 and 2021, and by CMS in 2022. However, until today, there had never been an observation. As well as being rare, four-top-quark production is notoriously difficult to detect. When physicists search for a particular event, they look for its “signature”: the properties of the final particles of a decay. These provide clues to the short-lived events they are looking for. Every top quark decays into a W boson and a bottom quark. The W boson can then decay into either a charged lepton and a neutrino or a quark–antiquark pair. This means that the signature of four-top-quark events can be highly varied, containing from zero to four charged leptons and up to 12 jets produced by the quarks. This makes looking for the signature of four-top-quark production challenging. To help search for these events, both ATLAS and CMS used novel machine-learning techniques to build the algorithms that select four-top-quark candidate events. The analyses use the spectacular four-top-quark signature with multiple electrons, muons and (bottom-quark-tagged) jets to separate the events with four top quarks from the background due to other Standard Model processes with larger production rates. Both ATLAS and CMS searched for event signatures containing two or more leptons. The first direct observation of four-top-quark production is an exciting new step in learning more about this fascinating particle. Both experiments look forward to continuing to study this phenomenon during LHC Run 3. Read more: ATLAS physics briefing CMS physics briefing
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  https://twitter.com/CERN/status/1639268947697573894/photo/1
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Saturday, 25-Mar-2023 00:00:24 UTC Stephen Sekula

From TRIUMFLab https://twitter.com/TRIUMFLab on Twitter: Calling physics graduate students: Registration for this year's Tri-Institute Summer School on Elementary Particles (TRISEP) is now open! https://twitter.com/TRIUMFLab/status/1639326745479516160/photo/1 https://chirp.cooleysekula.net/attachment/e4e460f8a31e679d2d052c4b79d02b9a2d6e7de85a41acbcbb217073ca46637f/view
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  https://twitter.com/TRIUMFLab
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  https://twitter.com/TRIUMFLab/status/1639326745479516160/photo/1
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Friday, 24-Mar-2023 20:46:34 UTC Stephen Sekula

From ATLASexperiment https://twitter.com/ATLASexperiment on Twitter: The ATLAS Collaboration at @CERN announces the observation of the simultaneous production of four top quarks! This is one of the rarest – and heaviest – processes ever observed at the LHC, with a total particle mass of almost 700 GeV. Learn more in our new briefing ⤵️
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  from Twitter
  
  Tweets by ATLASexperiment
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Friday, 24-Mar-2023 20:45:19 UTC Stephen Sekula

From MBKplus https://twitter.com/MBKplus on Twitter: Later today, #JWST will point at a portion of the sky that looks fully unremarkable to the naked eye. Why are astronomers and cosmologists so excitedly awaiting the results of these specific observations? Let me tell you! 🧵
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Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Friday, 24-Mar-2023 20:40:17 UTC Stephen Sekula

From CMSexperiment@sciencemastodon.com on Mastodon: Top quarks have been observed to play in quartet! 🤩 This marks the first observation by CMS of the simultaneous production of four top quarks, opening the door to new and exciting physics. 🔔 Read the physics briefing here: https:// cms.cern/news/cms-observes-fou r-top-quark-production # cern # cmsexperiment # moriond # particlephysics # physics # science

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Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Friday, 24-Mar-2023 10:10:21 UTC Stephen Sekula

AI isn’t magic or evil. Here’s how to spot AI myths. https://www. washingtonpost.com/technology/ 2023/03/22/ai-red-flags-misinformation/ # WashintonPost
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Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Friday, 24-Mar-2023 01:55:23 UTC Stephen Sekula

From JillDunlop1 https://twitter.com/JillDunlop1 on Twitter: Today, our government released the Ontario 2023 Budget - Building a #StrongOntario. Learn more about our plan to drive growth by lowering costs, getting key infrastructure projects built faster, and attracting more investment: https://news.ontario.ca/en/release/1002856/building-a-strong-ontario #ONBudget2023 https://twitter.com/JillDunlop1/status/1639038329239871491/photo/1 https://chirp.cooleysekula.net/attachment/ea4be733ffa6bdd0873bcf588f50ae7544af85ab37526e0cdfa2ebcae516cd7a/view
In conversation about 3 days ago from NavierStokesApp permalink
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  https://twitter.com/JillDunlop1
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  Ontario Newsroom
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  https://twitter.com/JillDunlop1/status/1639038329239871491/photo/1
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Thursday, 23-Mar-2023 12:00:20 UTC Stephen Sekula

Excited about my second day physically back at work at SNOLAB. I will be splitting my time today between the surface building at the lab site and our space at Laurentian University. Looking forward to running into SNO folks who are in Sudbury for their collaboration meeting this week.

In conversation about 4 days ago from NavierStokesApp permalink
Stephen Sekula (steve@chirp.cooleysekula.net)'s status on Thursday, 23-Mar-2023 09:45:20 UTC Stephen Sekula

From McDonaldInst https://twitter.com/McDonaldInst on Twitter: 🔭Fast radio bursts were only discovered in 2007, and astronomers still don't know what they are. Join Prof Victoria Kaspi from the CHIME radio telescope TOMORROW at @queensu or online📺 for this hybrid event exploring this extragalactic mystery! ✴️ 🎟️https://www.eventbrite.ca/e/the-fast-radio-cosmos-victoria-kaspi-ewan-lecture-tickets-528635491987?aff=twdb
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  https://twitter.com/McDonaldInst

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