Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
G. Aad · ATLAS Collaboration (~2900 authors)
Summary
The ATLAS Collaboration reported the observation of a new neutral boson in searches for the Standard Model Higgs boson, using proton-proton collision data from the LHC corresponding to about 4.8 fb⁻¹ at √s = 7 TeV (2011) and 5.8 fb⁻¹ at √s = 8 TeV (2012). Combining sensitive decay channels, the analysis found an excess at a mass of about 126.0 GeV with a local significance of 5.9 standard deviations, consistent with the production and decay of a Standard Model Higgs boson. The result, announced jointly with a companion CMS measurement, provided experimental confirmation of the boson associated with the Brout–Englert–Higgs mechanism of electroweak symmetry breaking.
Key findings
- Observed a new neutral boson at a mass of about 126.0 GeV (126.0 ± 0.4 (stat) ± 0.4 (sys) GeV).
- The signal reached a local significance of 5.9 standard deviations, surpassing the 5σ discovery threshold.
- The properties were consistent with the Standard Model Higgs boson, confirming the long-predicted mechanism of electroweak symmetry breaking.
Subjects & keywords
Cite this paper
G. Aad [ATLAS Collaboration (~2900 authors)] (2012). Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC. Physics Letters B. https://doi.org/10.1016/j.physletb.2012.08.020
@article{aad2012observation,
author = {G. Aad and {ATLAS Collaboration (~2900 authors)}},
title = {Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC},
journal = {Physics Letters B},
year = {2012},
doi = {10.1016/j.physletb.2012.08.020},
url = {https://doi.org/10.1016/j.physletb.2012.08.020}
}