1,738,224 research outputs found
A new boson with a mass of 125 GeV observed with the CMS experiment at the Large Hadron Collider
No full textThe Higgs boson was postulated nearly five decades ago within the framework of the standard model of particle physics and has been the subject of numerous searches at accelerators around the world. Its discovery would verify the existence of a complex scalar field thought to give mass to three of the carriers of the electroweak force-the W+, W-, and Z(0) bosons-as well as to the fundamental quarks and leptons. The CMS Collaboration has observed, with a statistical significance of five standard deviations, a new particle produced in proton-proton collisions at the Large Hadron Collider at CERN. The evidence is strongest in the diphoton and four-lepton (electrons and/or muons) final states, which provide the best mass resolution in the CMS detector. The probability of the observed signal being due to a random fluctuation of the background is about 1 in 3 x 10(6). The new particle is a boson with spin not equal to 1 and has a mass of about 1.25 giga-electron volts. Although its measured properties are, within the uncertainties of the present data, consistent with those expected of the Higgs boson, more data are needed to elucidate the precise nature of the new particle
Author Correction: A portrait of the Higgs boson by the CMS experiment ten years after the discovery (Nature, (2022), 607, 7917, (60-68), 10.1038/s41586-022-04892-x)
No full textCorrection to: Nature Published online 4 July 2022 In the version of this article initially published, CMS Collaboration author names, affiliations and acknowledgements were omitted and have now been included in the HTML and PDF versions of the article.SCOAP
First results and prospects in B physics at CMS
No full textThe first results in b physics obtained by the CMS collaboration from the data collected in pp collisions at 7 TeV at the LHC. In particular, results are reported on heavy quarkoniun production (J/ψ) and Y), and on inclusive b jet production cross section. Progress on exclusive reconstructions is also mentioned
Search for microscopic black hole signatures at the Large Hadron Collider
No full textA search for microscopic black hole production and decay in pp collisions at a center-of-mass energy of 7 TeV has been conducted by the CMS Collaboration at the LHC, using a data sample corresponding to an integrated luminosity of 35 pb−1. Events with large total transverse energy are analyzed for the presence of multiple high-energy jets, leptons, and photons, typical of a signal expected from a microscopic black hole. Good agreement with the standard model backgrounds, dominated by QCD multijet production, is observed for various final-state multiplicities and model-independent limits on new physics in these final states are set. Using simple semi-classical approximation, limits on the minimum black hole mass are derived as well, in the range 3.5–4.5 TeV. These are the first direct limits on black hole production at a particle accelerator
Performance Study of the CMS Barrel Resistive Plate Chambers with Cosmic Rays
No full textIn October and November 2008, the CMS collaboration conducted a programme of cosmic ray data taking, which has recorded about 270 million events. The Resistive Plate Chamber system, which is part of the CMS muon detection system, was successfully operated in the full barrel. More than 98% of the channels were operational during the exercise with typical detection efficiency of 90%. In this paper, the performance of the detector during these dedicated runs is reported
Author Correction: A portrait of the Higgs boson by the CMS experiment ten years after the discovery
No full textIn the version of this article initially published, CMS Collaboration author names, affiliations and acknowledgements were omitted and have now been included in the HTML and PDF versions of the article.Publisher versio
CMS Collaboration
No full textThe Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authorit
Erratum to: Measurement of the top quark mass with lepton+jets final states using pp collisions at √s = 13 TeV (The European Physical Journal C, (2018), 78, 11, (891), 10.1140/epjc/s10052-018-6332-9)
No full textThe Original Article was published on 02 November 2018Copyright © CERN for the benefit of the CMS collaboration 2022. 1 Erratum to: Eur. Phys. J. C (2018) 78:891 https://doi.org/10.1140/epjc/s10052-018-6332-9
In this article the author name Luigi Calligaris was incorrectly written as A. Calligaris. The original article has been corrected.SCOAP3
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