ATLAS News

ATLAS and CMS combine summer '11 search limits on the Standard Model Higgs

18th November 2011 – Perhaps the most anticipated result of the LHC involves the search for the Higgs boson, the only particle predicted by the Standard Model (SM) that has not yet been seen by experiments. The Higgs boson helps explain how elementary particles acquire mass. If the SM Higgs boson exists it will be produced at the LHC and swiftly decay into various known and well-studied particles, with the dominant decay products depending on the actual Higgs mass. ATLAS and CMS search for the SM Higgs boson using a range of decay products: two photons; two tau leptons; two b quarks; two W bosons; and two Z bosons. Analysing all these channels ensures that the search is sensitive to observing the Higgs irrespective of its mass.

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ATLAS reveals latest results at HCP11

16th November 2011 – The ATLAS Experiment presented its latest results at the Hadron Collider Physics Symposium 2011 in Paris, France (14-18 November). Many of the most recent searches and analyses are based on more than double the data available at the last big conference in August.

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ATLAS Reaches Milestone: 5 Inverse Femtobarns of Data!

28th October 2011 – In an amazing year that has exceeded our expectations, the Large Hadron Collider has delivered, and ATLAS has recorded, over 5 inverse femtobarns (fb-1) of collisions. These units correspond to having 3.4 x  1014 or 340 000 000 000 000 total collisions. Most analyses presented at the last major conference (the Lepton Photon Symposium in August in Mumbai) made use of about 1 fb-1, so this is a big jump.

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ATLAS goes Pop in Paris!

18th October 2011 – A new French edition of the ATLAS pop-up book, Voyage au Cœur de la Matière (Voyage to the Heart of Matter), will be officially launched from the exhibition Entrée en Matière at Paris' Trocadéro on Tuesday, October 25th.

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Moonlighting as a Physicist

24th September 2011 – There was a lively buzz about the ATLAS Control Room last Friday night, September 23rd, as local high school students descended to get a closer look at just exactly what goes on at the front line of particle physics.

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ATLAS advances in the search for the Higgs and New Physics

22nd August 2011 – The ATLAS experiment has continued to record data and to refine the analyses in the search for the Higgs boson and many other exciting signatures of new physics. The latest results are being presented at the Lepton Photon 2011 symposium in Mumbai, India, 22-27 August 2011. Since the previous meeting (the European Physical Society — EPS, Grenoble, France, 21-27 July 2011), the LHC has almost doubled the data provided to ATLAS.

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ATLAS Presents New Results at Lepton Photon 2011

17th August 2011 – The ATLAS Collaboration is pleased to be presenting its latest results at the Lepton Photon 2011 conference in Mumbai 22-27 August 2011.

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ATLAS Results Revealed at EPS HEP 2011 Conference in Grenoble

27th July 2011 – Many members of the ATLAS Experiment Collaboration have been at the European Physical Society's HEP 2011 conference in Grenoble, France, this week, revealing the results of 35 new and exciting physics analyses for the very first time.

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A Search for New Physics Processes using Dijet Events

21st June 2011 – The ATLAS Experiment has extended the energy frontier of searches for new particles and new processes beyond those of the Standard Model by studying collision events with so-called "dijets".

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Is Nature Supersymmetric?

24th May 2011 – String Theory predicts a new symmetry, called "supersymmetry", that could shed light on some of today's mysteries of fundamental particles and interactions. In supersymmetry, every particle-type should have a "shadow" particle called a super-partner that (in general) has a much higher mass. The ATLAS Experiment has analyzed the first year of its LHC data and searched for evidence of these super-partners of ordinary matter.

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ATLAS Experiment Reports Its First Physics Results from the LHC

17th March 2010 – The first physics results from the ATLAS Experiment with proton-proton collisions at an energy of 0.9 TeV in late 2009 have now been accepted for publication in the journal Physics Letters B.

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More collisions at 2.36 TeV

14th December 2009 – This early morning Dec.14 at 2.40, after a 8 minutes ramp, the energy of the two LHC beams has been brought up to 1.18 TeV again.

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First collisions in ATLAS

23rd November 2009 – A few days ago, loud cheers and happy faces filled the ATLAS Control Room while the whole detector lit up: protons are back at the experiment's door, and everybody forgot in a second the long year of waiting for the Large Hadron Collider (LHC) to resume operation.

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LHC beams and events back in ATLAS

20th November 2009 – Loud cheers and happy faces fill the ATLAS Control Room while the whole detector lights up: protons are back today at the experiment's door, and everybody forgets in a second the long year of waiting for the Large Hadron Collider (LHC) to resume operation.

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ATLAS Preparing for Collisions in Late-2009

15th November 2009 – The most recent schedule envisions beam reaching ATLAS in late November with low-energy collisions shortly thereafter.

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Multimedia contest launched

4th May 2009 – A new multimedia contest has been set up to put talented young filmmakers and science communicators in touch with ATLAS.

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Higgs finds the Higgs at RAL

1st April 2009 – On Friday, March 13th, British high school student Jonathan Higgs discovered the elusive Higgs boson among the simulated particle tracks in Minerva – a special form of ATLAS’s event display program, Atlantis, designed for students in the International Particle Physics Masterclasses.

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A comic takes on CERN

24th March 2009 – If you want insight into the lives of graduate students, look no further than Jorge Cham’s Piled Higher and Deeper comic series, detailing the trials and tribulations of earning a PhD. He brought his well-honed observational humour to CERN, meeting with a few graduate students and post-docs for a slice of life at the world’s largest physics experiment.

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A Wall ATLAS

9th March 2009 – Twenty-eight-year-old Josef Kristofoletti is a traveling artist. On the site documenting the work of his group, transitantenna.com, he writes: "I am taking a survey of American mural painting in all of its forms, looking for the best pictures across the land, and painting some along the way." One of these paintings is an image of the ATLAS detector, a 13 x 7 metre mural on the side of the Redux Contemporary Art Center in South Carolina, entitled "Angel of the Higgs Boson".

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Tinseltown pays us a visit

25th February 2009 – ATLAS got a little taste of Tinseltown on February 12th, as director Ron Howard, and actors Tom Hanks and Ayelet Zurer rolled into town to promote their new film – an adaption of Dan Brown’s bestseller Angels and Demons.

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