The Large Hadron Collider at
@CERN
has officially kicked off for Run 3! 🥳👏
The ATLAS Experiment has recorded its first collisions at the world-record-breaking energy of 13.6 tera electron volts (TeV).
#LHCRun3
Listen to heavy ions collide in the
#LHC
! 🎶🎇
Data from the ATLAS detector has been transformed into a symphony of sounds via Quantizer, a
@medialab
sonification platform. Listen to even more ATLAS collisions LIVE at .
Happy
#Higgsboson
Discovery Day! 🥳🥳
Nine years ago today, the ATLAS Experiment and
@CMSexperiment
announced the discovery of the Higgs boson.
📌 Learn more about the key role this particle plays in our Universe:
Eight years on and we've learnt a lot about the
#Higgsboson
since announcing its discovery at
@CERN
. The ATLAS Experiment has been putting this unique particle through its paces – here’s what we’ve uncovered so far. THREAD ⤵️
Happy
#Higgs
Discovery Day! Seven years ago today, ATLAS and
@CMSexperiment
at CERN announced the discovery of the Higgs boson.
📌Learn more about the discovery and study of this key particle:
Playing in “survival mode” during your
#StayAtHomeChallenge
? Explore the
@CERN
particle physics lab and ATLAS Experiment in the Minecraft universe.
🧱➡️Visit:
The ATLAS Experiment
@CERN
's Colouring Book is now available in 13 languages! Make sure to check out our newest languages: Spanish 🇪🇸 and Italian 🇮🇹
➡️👩🎨 Free to download and print at home! Just visit:
Today marks the last day of proton-proton collisions for Run 2 of the LHC! In total, ATLAS has recorded 149 fb-1 of data at 13 TeV – a huge dataset for physicists to study the Standard Model and probe for hidden signatures.
New milestone! The first module of the New Small Wheel detectors was installed today at
@CERN
. These new wheels will replace of the innermost sections of the muon-detection system in the end-caps of ATLAS.
The ATLAS Experiment at
@CERN
has observed a potential tetraquark! This exotic particle is made up of four charm quarks.
#ICHEP2022
Learn more in our new briefing ⤵️
Look at these stunning new collision event displays recorded in the ATLAS Experiment at
@CERN
!
The higher beam energy and intensity of
#LHCRun3
will allow ATLAS to push the very limits of its physics research. Learn about today's exciting LHC restart:
Have you ever looked at this photo of ATLAS, taken during our construction in 2005 when all eight toroid coils were in place for the Barrel Toroid Magnet, and wondered:
"Who is the man in the centre?" 🤔👷♂️
What is a leptoquark? And how can the ATLAS Experiment at
@CERN
search for such hypothetical particles? 🤔
Physicist Yasuyuki Okumura, who presented the ATLAS' latest search for these elusive particles at
#ICHEP2020
, explains! Full video:
The ATLAS Experiment at
@CERN
observes, for the first time, quantum entanglement between a pair of top quarks. This is the highest-energy measurement of entanglement to date. New ATLAS briefing ⤵️
Beams splash in the ATLAS Experiment! 🎇
For the first time in over 2 years, pilot beams are back in the LHC. ATLAS recorded its first "splash" collision events, testing the detector with real particles in preparation for the 2022 restart.
Learn more:
Eight years after its discovery at
@CERN
, what's still left to learn about the Higgs boson? 🧐
Physicist Matt Klein, who presented Higgs results at the
#ICHEP2020
conference, shares ATLAS' exciting new insights into this once-elusive particle! Full video:
Twice the Higgs, twice the challenge! 🔍💪
Physicists at
@CERN
's ATLAS Experiment explain their new search for pairs of Higgs bosons in the rare bbɣɣ decay channel. Find out more:
The ATLAS Collaboration at
@CERN
is celebrating the results of 1,000 papers studying LHC collisions.
From the discovery of the Higgs boson to searches for new physics, these results give unprecedented insight into our Universe. Let's explore! THREAD⤵️
The ATLAS Collaboration at
@CERN
is committed to improving the visibility and representation of LGBTQ+ people in STEM.
We're proud to support our LGBTQ+ colleagues – on
#LGBTSTEMday
and every day! 🏳️🌈🏳️⚧️
Hold your next video-conference at the world's largest particle physics experiment! Save these
@zoom_us
backgrounds of the ATLAS Experiment at
@CERN
. 🎇
Physicists at
@CERN
's ATLAS Experiment find further evidence of the four-top-quark process!
This is the heaviest particle final state ever seen at the LHC 😯 and provides physicists with a unique opportunity to study the top quark’s relationship to the
#Higgsboson
.
Happy International Women's Day!
#IWD2019
We've asked
#WomeninPhysics
from across the ATLAS Collaboration at
@CERN
to share their advice for girls and women looking to pursue a career in physics!
#PassOnMyWisdom
Stuck inside? Take a virtual tour of the ATLAS Experiment at
@CERN
via Google
#StreetView
! It isn’t as good as the real thing, but it’s pretty close.
➡️Visit:
Going up! 👩🔧👨🔧
Today at the ATLAS experiment, teams removed one of the Muon "Small" Wheels from the cavern. This impressive feat is one of many important jobs taking place at ATLAS during Long Shutdown 2 of the LHC. Learn more at:
LS2 Report: ATLAS upgrades are in full swing. The assembly of the new muon small wheels and the upgrades on the electronics and trigger systems are progressing well. Find out more ⬇️
The search for
#DarkMatter
at particle colliders is entering a new era. 💫
Physicist Katharine Leney describes how the ATLAS experiment at
@CERN
will be looking for elusive Dark Matter particles during Run 3 of the LHC.
Heavy ions collide in the ATLAS experiment! 🎇 🎇
Today, ATLAS recorded the year’s first collisions of lead ions with stable beams. These heavy-ion collisions will last three and a half weeks, with the last beams of Run 2 scheduled for 3 December.
🎉In celebration of
#10yearsofLHCphysics
, here's a look back at the ATLAS Experiment's first 7 TeV collision events!
These marked the start of a rich harvest of physics data, as the LHC began its operation at an energy 3.5x higher than previously achieved at any accelerator.
The ATLAS Experiment has made important progress in the ongoing search for new physics – including the search for
#darkmatter
!
Dr. Philipp Mogg (with
@LMU_Muenchen
) explains the latest new results. Learn more:
Science in action! 👩🏭 Watch the ATLAS New Small Wheel detector as it is lowered 100 m underground at
@CERN
. Here are some facts about this incredible upgrade:
➡️ it weighs over 100 tonnes
➡️ 10 metres in diameter
➡️ over 2 million readout channels
What a sight!🤩
The New Small Wheel "C" is unwrapped outside the ATLAS experiment hall. The sun came out just in time to show off its gleaming new detectors!
Explore the new “Particles of the Universe”
#ColoringBook
!
This free-to-download book by the ATLAS Experiment
@CERN
introduces you to the particles that scientists have discovered – so far! – and describes the role they play in our Universe.
➡️ Download:
Yesterday we welcomed Jack White, American singer and songwriter, on his visit to
@CERN
. ATLAS physicist Chris Martin led the tour of the ATLAS Control Room for Jack and his band-mates, afterwards posing for a photo with the rock legend himself!
The ATLAS Collaboration announces the first observation of two W bosons produced from the scattering of two photons — particles of light ⚡️– at the International Conference on High-Energy Physics
#ICHEP2020
!
➡️ Learn more in our new briefing:
Searching for new phenomena with the Higgs boson! 🔍
Dr. Sarah Heim (with
@DESY
) explains ATLAS' novel approach to the search for
#newphysics
. Learn more:
Discovering the
#Higgsboson
was just the start! By studying its behaviour, physicists at
@CERN
's ATLAS Experiment are gaining new insight into this unique particle.
Dr Kristin Lohwasser & Konstantin Lehmann explain ATLAS' latest result. 🥑 Learn more:
Today is the 10th anniversary of the monumental discovery of the Higgs boson!
#Higgs10
🥳
We’ve learned a lot about this unique particle, but many mysteries remain. Let's take a look at ATLAS’ most important insights into the Higgs boson (so far). THREAD⬇️
Happy
#Higgs10
anniversary!
#OnThisDay
in 2012, the
@ATLASexperiment
and
@CMSexperiment
announced the discovery of the Higgs boson. Its existence confirms the existence of the “Higgs field”, which gives mass to elementary particles.
Find out more:
The ATLAS Collaboration at
@CERN
has measured – for the first time – the full polarization vectors for both top quarks and anti-quarks!
📽️ Physicist Galo Gonzalvo explains top polarization, why it is so interesting and what the team found! Learn more:
On 30 March 2010 - 10 years ago
#OnThisDay
- the ATLAS Experiment at
@CERN
recorded its first-ever high-energy collisions!
This major milestone came after years of preparation and hard work - with celebrations in the Control Room reflecting the excitement 🥂
#10yearsofLHCphysics
The ATLAS Experiment at
@CERN
is looking for signs of
#darkmatter
with particles of light (photons). Their latest search sets the best exclusion limits at the LHC on the search for Higgs bosons decaying to a photon and "dark photon".
Learn more in the new briefing ⤵️
ATLAS physicists study the collisions of photons – particles of light – in search of rare phenomena... several of which have now been observed! ⚡️⚡️
Mateusz Dyndal, who presented these "photon-photon fusion" results at
#ICHEP2020
, explains! Full video:
Inspired by
@NASA
’s successful landing of Perseverance on Mars, ATLAS scientists are redesigning their Muon Big Wheels with a message common to our endeavours. 🎇
Can you decode their message? Enter the competition ➡️
Researchers at
@CERN
are on the hunt for "W prime bosons" - massive new particles that could explain several unresolved mysteries of the Universe! 🔎
ATLAS physicist Makayla Vessella explains a brand-new search for these particles
#LHCP2021
. Learn more:
To precisely study the
#Higgs
and extend our sensitivity to
#newphysics
in the coming years of LHC operations, the ATLAS experiment has a clear upgrade plan in place. Read about ATLAS' vision for Long Shutdown 2 in this month's edition of the CERN Courier:
[Physics Briefing] New ATLAS result establishes production of
#Higgs
boson in association with top quarks. This rare process is one of the most sensitive tests of the Higgs mechanism.
Find out more:
The ATLAS Collaboration at
@CERN
observes the simultaneous creation of three W bosons. 🎇
Physicists Vallary Bhopatkar (
@Argonne
) & Muhammad Alhroob (
@uofoklahoma
) explain why this result is so interesting, and what we are still learning about the boson 40 years after discovery.
Grab your hard hat, we're off to see the ATLAS Experiment
@CERN
! Enjoy a guided 360° tour of the world's largest particle-physics experiment from the comfort of your own home.
#StayHome
ATLAS has – at long last – observed the Higgs boson decaying into a pair of bottom (b) quarks! In this video, our physicists explain why this is such an important milestone. Learn more:
Join us for one last look at the ATLAS Experiment before
#restartingLHC
!
Our final underground virtual visit will be streamed live on Youtube this Wednesday, 23 March at 4pm CET. Tune in for a tour of the ATLAS cavern and a live Q&A session.
⏰ Set reminder ⤵️
Look who stopped by the ATLAS Experiment at
@CERN
after a busy night! 🎅
Season's Greetings from the ATLAS Collaboration. Sending our warmest wishes this holiday season. ❄️☃️🎄
The ATLAS Collaboration is a proud supporter of
#LGBTSTEMDay
and is committed to improving the visibility and representation of LGBTQ+ people in STEM. 🏳️🌈🏳️⚧️
With the
#LHC
shutdown for 2 years, what’s going on at the ATLAS Experiment? Check in with the teams at work underground to upgrade and maintain the ATLAS detector 👇
The ATLAS Collaboration at
@CERN
is turning 30! 🎂
On 1 Oct 1992, thirty years ago today, we submitted our letter of intent to the LHC Experiments Committee - marking the start of a new era of scientific discovery. Check out our timeline to learn more!
Check out these beautiful new event displays!🎆
On 29 October 2021, the ATLAS Experiment at
@CERN
recorded low-intensity test collisions. The LHC accelerated proton beams to 'injection energy' – 450 GeV per beam – in preparation for its restart next year.
The ATLAS Experiment
@CERN
has released the most precise study of the
#Higgsboson
’s interaction with bottom and charm quarks! This groundbreaking result gives new insight into how particles get their mass. Learn more ⤵️
Explore over 7 billion LHC collision events from home💻
The ATLAS Experiment at
@CERN
has made public two years' worth of LHC data! This
#OpenData
release for research is the first of its kind from ATLAS, marking a major milestone for public access.
Join the next open
#virtualvisit
of the ATLAS Experiment at
@CERN
! These are held the last Friday of every month, live from the ATLAS cavern.👩🏭
📌Upcoming: Friday 25 June at 4pm CEST
➡️ Sign up:
Learn more:
Despite the huge challenges of the COVID19 pandemic, 2020 saw great successes for the ATLAS Collaboration at
@CERN
– including first-of-a-kind physics results 🎆 and new detector upgrades 👩🏭.
➡️ Explore the ATLAS highlights of an unprecedented year:
THREAD: Over the past month, the ATLAS Collaboration has released a bumper crop of new results. From precise measurements of the Standard Model to novel searches for new physics, here's what you may have missed ⤵️
Heavy ions collide in the ATLAS Experiment! 🎆
On Friday 18 November, the Large Hadron Collider at
@CERN
collided lead ions at a record centre-of-mass energy per nucleon pair of 5.36 TeV! Check out these stunning first event displays of the collisions. 🤩
Join the next open
#virtualvisit
of the ATLAS Experiment at
@CERN
! Our upcoming visit will be Monday 19 Sept, LIVE from the ATLAS cavern.
📌 Save the date: Monday 19 Sept at 4pm CET/10am ET
➡️ Sign up:
Studying the Higgs boson in its most common – yet uncommonly challenging – decay channel 🔍
New results from the ATLAS Collaboration at
@CERN
look at different production modes of the Higgs boson decaying into b-quarks – and capitalise on the power of
#machinelearning
!
The ATLAS Collaboration celebrates the International Day of
#WomenInScience
and stands with all young women and girls who want to pursue a career in
#STEM
! Find out what our PhD students love about working at the forefront of particle physics 👩💻🧵 ⤵️
The ATLAS Experiment at
@CERN
has just released a new search for long-lived particles originating from a Higgs boson!
The new result looks for particles leaving an unusual "displaced" signature in the detector. Learn more:
Studying the Higgs boson at world-record energies!
The ATLAS Experiment at
@CERN
has just released new measurements of the Higgs-boson production rate at 13.6 TeV, using data collected in 2022.
#LHCP2023
Learn more in the new physics briefing ➡️
The ATLAS Experiment at
@CERN
will be live on Facebook at 5pm CEST! Physicists Nicolas Morange, Kate Shaw & Pierre Savard will discuss the latest studies of the
#Higgs
boson, and explain why 2018 has been such a landmark year for the particle.
Join us:
The ATLAS Collaboration
@CERN
announces strong evidence of the production of four top quarks.
This is an extremely rare Standard Model process - one that has proven incredibly difficult for physicists to measure.
#LHCP2020
➡️Learn more:
The
@ATLASExperiment
at
@CERN
has just released its most precise measurement of the
#Wboson
mass.
This is a fundamental parameter of Nature – and ATLAS’ measurement is in line with the Standard Model of particle physics. Here’s what that means ⤵️
It's
#BeamTime
at the LHC! 🎆
Last Friday, the ATLAS Experiment at
@CERN
recorded its first beam-splashes of 2024. Using a single bunch of protons from the LHC, these tests shower the ATLAS experiment with particles, providing vital tests for its sub-detectors.
New ATLAS results are here! 🥳
This week, we'll be unveiling several new analyses at the
#LHCP2023
conference. These will be explored in upcoming ATLAS Physics Briefings. Follow along:
The ATLAS Collaboration
@CERN
has just announced the best limit on the
#Higgsboson
decay to charm quarks to date!
But why is this decay so interesting? And why is it so hard to find? Members of the analysis team explain.
#LHCP2021
Learn more:
The countdown to
#LHCRun3
continues! This week, the ATLAS Experiment at
@CERN
recorded its very first test collisions of 2022. Take a look at these amazing new collision event displays ⤵️
[Physics Briefing] ATLAS releases new search for
#Higgsboson
interactions with the lightest charged lepton: the electron
This process is so extraordinarily rare that, if observed by ATLAS, a new-physics process would have to be responsible ➡️ Learn more:
It's collision time!
The ATLAS Experiment at
@CERN
recorded its first 13.6 TeV collisions of 2023! This marks the start of a new data-taking harvest for the experiment and an exciting continuation of the
#LHCRun3
programme.
🥳 It's here! 🥳 The first New Small Wheel detector has arrived at the ATLAS site - ready to be lowered and installed in the experimental cavern next week.
This new detector is part of a massive upgrade of the ATLAS experiment in preparation for
#HiLumiLHC
.
📸 Marco Ciapetti
The ATLAS Experiment and
@CMSExperiment
have joined forces to report first evidence of a new, rare decay of the
#Higgsboson
!
➡️Read the joint ATLAS/CMS physics briefing to learn more: