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Measuring known Standard Model processes is by no means easy!
Watch today's CERN-LHC Seminar at 11h CEST:
Observation of the H->b bbar decay at ATLAS and CMS
https://webcast.web.cern.ch/event/i750541
"This seminar presents the observation of the Higgs boson decay to a bottom quark-antiquark pair by the ATLAS and CMS experiments. The results presented use all available datasets from the LHC Run 1 and Run 2 including the most recent 13 TeV dataset that corresponds to an integrated luminosity of ~80 fb^-1. The analysis strategy and the background estimation techniques are discussed and a comprehensive set of measurements are presented."
The speakers are Luca Perrozzi (ETH Zurich (CH)) on behalf of the Compact Muon Solenoid - CMS Collaboration, and Nicolas Morange (LAL, CNRS (FR)) on behalf of the ATLAS Collaboration.
Observation of the H->b bbar decay at ATLAS and CMS
https://webcast.web.cern.ch/event/i750541
"This seminar presents the observation of the Higgs boson decay to a bottom quark-antiquark pair by the ATLAS and CMS experiments. The results presented use all available datasets from the LHC Run 1 and Run 2 including the most recent 13 TeV dataset that corresponds to an integrated luminosity of ~80 fb^-1. The analysis strategy and the background estimation techniques are discussed and a comprehensive set of measurements are presented."
The speakers are Luca Perrozzi (ETH Zurich (CH)) on behalf of the Compact Muon Solenoid - CMS Collaboration, and Nicolas Morange (LAL, CNRS (FR)) on behalf of the ATLAS Collaboration.
Observation of the H->b bbar decay at ATLAS and CMS | CERN Webcast Website
webcast.web.cern.ch
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New constraints on effects beyond the Standard Model...
[Physics Briefing] Stronger together: combining searches for new heavy resonances
While the Standard Model has proven tremendously successful, much experimental evidence points to it not being a complete description of our universe. The search for “new physics” is therefore an important component of the ATLAS experimental programme, where a number of analyses are looking for signs of new heavy particles decaying to different final states...
https://atlas.cern/updates/physics-briefing/stronger-together-combining-searches
While the Standard Model has proven tremendously successful, much experimental evidence points to it not being a complete description of our universe. The search for “new physics” is therefore an important component of the ATLAS experimental programme, where a number of analyses are looking for signs of new heavy particles decaying to different final states...
https://atlas.cern/updates/physics-briefing/stronger-together-combining-searches
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[ATLAS Blog] Boosting high-energy physics education around the world with ATLAS Open Data
Since the beginning of ATLAS, collaboration members have devoted hours, days, weeks and months teaching High Energy Physics (HEP) to anyone willing to listen. But sometimes those willing to listen do not have the means, especially when oceans and continents separate them from our experiment in Geneva. How can we overcome these geographical distances to allow anyone interested in HEP to learn?
Find out how the ATLAS Open Data project is addressing this issue: http://atlas.cern/updates/atlas-blog/HEP-education-worldwide-with-atlas-open-data
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[ATLAS News] ATLAS revealed key results at #ICHEP2018
Results shown included major developments in the measurement of Higgs boson properties, observations of key electroweak production processes and new high-precision tests of the Standard Model...
Find out more: https://atlas.cern/updates/atlas-news/key-results-ichep-2018
Results shown included major developments in the measurement of Higgs boson properties, observations of key electroweak production processes and new high-precision tests of the Standard Model...
Find out more: https://atlas.cern/updates/atlas-news/key-results-ichep-2018
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Subtle processes of the Standard Model (or, more precisely, of the Standard Theory)
[Physics Briefing] Quarks observed to interact via minuscule “weak lightsabers”
Two among the rarest processes probed so far at the LHC, the scattering between W and Z bosons emitted by quarks in proton-proton collisions, have been established by the ATLAS experiment at CERN...
More: http://atlas.cern/updates/physics-briefing/weak-lightsabers
Two among the rarest processes probed so far at the LHC, the scattering between W and Z bosons emitted by quarks in proton-proton collisions, have been established by the ATLAS experiment at CERN...
More: http://atlas.cern/updates/physics-briefing/weak-lightsabers
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Another example of how hard the data analysis at the LHC is...
[Physics Briefing] Beyond any doubt: Higgs boson couples to the heaviest lepton
A decisive property of the Higgs boson is its affinity to mass. The heavier a particle is, the stronger the Higgs boson will couple to it. While physicists have firmly established this property for heavy W and Z bosons (force carriers), more data are needed to measure the Higgs boson coupling to the heavy fermions (matter particles)...
Full briefing: http://atlas.cern/updates/physics-briefing/higgs-couples-heaviest-lepton
A decisive property of the Higgs boson is its affinity to mass. The heavier a particle is, the stronger the Higgs boson will couple to it. While physicists have firmly established this property for heavy W and Z bosons (force carriers), more data are needed to measure the Higgs boson coupling to the heavy fermions (matter particles)...
Full briefing: http://atlas.cern/updates/physics-briefing/higgs-couples-heaviest-lepton
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Measuring Standard Model processes is much harder than is commonly thought...
[ATLAS 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...
More: https://atlas.cern/updates/physics-briefing/observation-tth-production
This rare process is one of the most sensitive tests of the Higgs mechanism...
More: https://atlas.cern/updates/physics-briefing/observation-tth-production
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Searching for new effects requires a lot of-controlled-imagination...
[Physics Briefing] Catching hadronic vector boson decays with a finer net
ATLAS has been collecting increasing amounts of data at a centre-of-mass energy of 13 TeV to unravel some of the big mysteries in physics today. For instance, why is the mass of the Higgs boson so much lighter than one would expect? Why is gravity so weak?...
Full article: https://atlas.cern/updates/physics-briefing/vector-boson-decays
ATLAS has been collecting increasing amounts of data at a centre-of-mass energy of 13 TeV to unravel some of the big mysteries in physics today. For instance, why is the mass of the Higgs boson so much lighter than one would expect? Why is gravity so weak?...
Full article: https://atlas.cern/updates/physics-briefing/vector-boson-decays
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Setting limits on certain classes of models for new particles.
[Physics Briefing] The edge of SUSY
Physicists dream about finding bumps, or excess signals in the data. Bumps tend to point to something new that cannot be explained by the Standard Model, which gives the currently best understanding of the universe in spite of its deficiency to explain several important observations...
Full briefing at https://atlas.cern/updates/physics-briefing/edge-susy
Physicists dream about finding bumps, or excess signals in the data. Bumps tend to point to something new that cannot be explained by the Standard Model, which gives the currently best understanding of the universe in spite of its deficiency to explain several important observations...
Full briefing at https://atlas.cern/updates/physics-briefing/edge-susy
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[Physics Briefing] Noble collisions give new insights on heavy ion systems
In October 2017, the ATLAS experiment recorded collisions of xenon nuclei for the first time. While massive compared to a proton, xenon nuclei are smaller than the lead ions typically collided in the LHC...
Read more: http://atlas.cern/updates/physics-briefing/noble-collisions-give-new-insights-heavy-ion-systems
In October 2017, the ATLAS experiment recorded collisions of xenon nuclei for the first time. While massive compared to a proton, xenon nuclei are smaller than the lead ions typically collided in the LHC...
Read more: http://atlas.cern/updates/physics-briefing/noble-collisions-give-new-insights-heavy-ion-systems
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