Tag: CMS
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Higgs boson observed decaying to bottom quarks
Higgs boson observed decaying to bottom quarks Last month, the ATLAS and CMS collaborations jointly announced the discovery of the Higgs boson decaying into a matter-antimatter pair of bottom quarks. Previously, the Higgs boson has been observed decaying to photons, tau-leptons, and W and Z bosons. However, these impressive achievements represent only 30 percent of
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Developing new electronics for the CMS tracking system
Developing new electronics for the CMS tracking system The High Luminosity Large Hadron Collider (HL-LHC) entails a substantial upgrade of the CMS tracking system, to cope with much more demanding requirements and to implement additional functionalities. One of the main challenges for the experiments is the increased number of pile up events which for an
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Axion-like particle searches at the LHC
Axion-like particle searches at the LHC The Standard Model (SM) of Particle Physics is plagued by some longstanding conceptual and practical questions, and we have to go beyond the Standard Model to address them. A guiding principle of the Standard Model is that we should expect to see all processes which are consistent with its
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Mapping the CMS inner tracking system with unprecedented precision
Mapping the CMS inner tracking system with unprecedented precision In an experiment like CMS, it is important to know where all the detector material is. For example, in order to properly simulate the detector response, you need to know not only where the sensors are, but also the locations of the inactive material. Suppose you
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Precise timing detectors for the LHC experiments
Precise timing detectors for the LHC experiments The ATLAS and CMS experiments physics programme at the HL-LHC will target a very wide range of measurements, including in-depth studies of the Higgs boson properties and direct searches for physics beyond the standard model (BSM). Timing detectors will help improve vertex identification, acceptance extension for isolated objects,
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Heavy-ion collisions at Quark Matter 2018
Heavy-ion collisions at Quark Matter 2018 BROKEN IMAGE NOT MOVED (drupal url : https://ep-news.web.cern.ch//content/heavy-ion-collisions-quark-matter-2018) CERN experiments presented their latest results from the study of lead-ion collisions at the annual Quark Matter conference, that was held this year in Venice, Italy. The programme includes a plethora of presentations on a variety of topics, spanning QCD at
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New season starts for the LHC experiments
New season starts for the LHC experiments The last 2017 proton-proton collisions took place on 28 November and the LHC machine was shut down during the winter period to allow for planned technical interventions while the LHC experiments profit from this period to perform maintenance work on many sub-detectors. Four months later proton beams were
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Connecting the dots: applying deep learning techniques in HEP
Connecting the dots: applying deep learning techniques in HEP With massive amounts of computational power, machines can now recognize objects and translate speech in real time. Deep-learning software attempts to mimic the activity in layers of neurons in the neocortex, the wrinkly 80 percent of the brain where thinking occurs. The software learns, to recognize
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A new era for calorimetry?
A new era for calorimetry? Motivation In the mid-1990s the design of the CMS detector was being finalized, culminating in the relevant Technical Design Reports at the end of the decade. This was followed by the start of construction. The main constraints at the time were radiation tolerance and immunity to the effects of pileup.
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LHC experiments present results in Moriond Conference
LHC experiments present results in Moriond Conference This year saw the 53rd meeting in the series “Les Rencontres de Moriond”. ATLAS and CMS presented impressive results (see pictures) of searches for new phenomena, setting boundaries to where the new physics can still exist. These limits severely constrain models for physics beyond the Standard Model including