Observation of a new boson with mass near 125 GeV in pp collisions at sqrt(s) = 7 and 8 TeV

By Cms Collaboration. 2013

356 citations recorded by the source corpus.

A detailed description is reported of the analysis used by the CMS Collaboration in the search for the standard model Higgs boson in pp collisions at the LHC, which led to the observation of a new boson. The data sample corresponds to integrated luminosities up to 5.1 fb−1 at √ s = 7 TeV, and up to 5.3 fb−1 at √ s = 8 TeV. The results for five Higgs boson decay modes γγ, ZZ, WW, ττ, and bb, which show a combined local significance of 5 standard deviations near 125 GeV, are reviewed. A fit to the invariant mass of the two high resolution channels, γγ and ZZ→ 4`, gives a mass estimate of 125.3± 0.4 (stat.)± 0.5 (syst.) GeV. The measurements are interpreted in the context of the standard model Lagrangian for the scalar Higgs field interacting with fermions and vector bosons. The measured values of the corresponding couplings are compared to the standard model predictions. The hypothesis of custodial symmetry is tested through the measurement of the ratio of the couplings to the W and Z bosons. All the results are consistent, within their uncertainties, with the expectations for a standard model Higgs boson. Published in the Journal of High Energy Physics as doi:10.1007/JHEP06(2013)081. c © 2013 CERN for the benefit of the CMS Collaboration. CC-BY-3.0 license ∗See Appendix A for the list of collaboration members ar X iv :1 30 3. 45 71 v2 [ he pex ] 4 J ul 2 01 3

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/983ecd4fc7b274cdcef1c4ac66af487bc4d0046c

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In Nuclear and High Energy Physics

Citations in the corpus

Dark matter and neutrino masses from a scale-invariant multi-Higgs portal (2015, neutral): “In 2012, the ATLAS and CMS experiments of the Large Hadron Collider (LHC) at CERN reported the discovery [1, 2] of a boson that appears to be [3, 4] the long-sought Higgs particle [5–8] of the Standard Model (SM) [9–11].”
Particle-flow reconstruction and global event description with the CMS detector (2017, background): “The first working point, used in the search for H→ ZZ → 4 e [48, 49], provides very high electron efficiency in order to maximize the selection efficiency for events with four electrons.”
Search for the standard model Higgs boson produced in association with a W or a Z boson and decaying to bottom quarks (2013, methodology): “[12] with an updated analysis of the full 8 TeV data sample corresponding to a luminosity of up to 18.”
Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s = 8 TeV (2015, background): “These achievements, especially for low-pT electrons, played an essential role in the discovery of the Higgs boson at CMS [43, 44], and in the measurement of its properties [45] in the H→ ZZ∗ → 4` channel.”