Publication: Measurement of the properties of a Higgs boson in the four-lepton final state
Loading...
Date
Advisor
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society (APS)
Type
Abstract
The properties of a Higgs boson candidate are measured in the H to ZZ to 4l decay channel, with l = e, mu, using data from pp collisions corresponding to an integrated luminosity of 5.1 inverse femtobarns at the center-of-mass energy of sqrt(s) = 7 TeV and 19.7 inverse femtobarns at sqrt(s) = 8 TeV, recorded with the CMS detector at the LHC. The new boson is observed as a narrow resonance with a local significance of 6.8 standard deviations, a measured mass of 125.6 +- 0.4 (stat) +- 0.2 (syst) GeV, and a total width less than 3.4 GeV at the 95% confidence level. The production cross section of the new boson times its branching fraction to four leptons is measured to be 0.93 +0.26 -0.23 (stat) +0.13 -0.09 (syst) times that predicted by the standard model. Its spin-parity properties are found to be consistent with the expectations for the standard model Higgs boson. The hypotheses of a pseudoscalar and all tested spin-one boson hypotheses are excluded at the 99% confidence level or higher. All tested spin-two boson hypotheses are excluded at the 95% confidence level or higher.
Replaced with published version. Added journal reference and DOI
Replaced with published version. Added journal reference and DOI
Description
Subject
Physics and Astronomy (miscellaneous), Temel Bilimler (SCI), ATLAS DETECTOR, pp, PARTON, Hadron-hadron Collisions, PARTICLE PHYSICS, LARGE HADRON COLLIDER, CMS, final-state interaction [radiation], scattering [p p], Z0: pair production, applications of electroweak models to specific processes, ASTRONOMY & ASTROPHYSICS, info:eu-repo/classification/ddc/530, Monte Carlo, Measurement, [Anahtar Kelime Yok], Physics, ddc:530, Z0 --> lepton+ lepton-, PHYSICS, NUCLEAR, HADRON-HADRON COLLISIONS, ABELIAN GAUGE-THEORIES, ATLAS DETECTOR, PARTON DISTRIBUTIONS, MASSLESS PARTICLES, BROKEN SYMMETRIES, WEAK INTERACTIONS, ROOT-S=7 TEV, LHC, MODEL, pair production [Z0], CERN LHC Coll, CMS, pp, Higgs, Properties, Physical Sciences, Physique des particules élémentaires, PARTICLE PHYSICS, physics, p p: scattering, mass spectrum: (4lepton), LHC, CMS, Massless Particles, CMS detector, FİZİK, NÜKLEER, particle physics, Higgs particle --> 2Z0, standard-model Higgs bosons, Parton Distributions, Astronomy and Astrophysics, (4lepton) [mass spectrum], LARGE HADRON COLLIDER, width [narrow resonance], QC Physics / fizika, spin: parity, Broken Symmetries, Higgs, limits on production of particles, narrow resonance: width, Higgs particle: decay, Astronomi ve Astrofizik, High Energy Physics - Experiment, p p --> Higgs particle anything, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], SPACE SCIENCE, Fisica delle particelle, GeV-cms [7000], CMS, Temel Bilimler, parity [spin], decay [Higgs particle], Nuclear and High Energy Physics, Physics and Astronomy (miscellaneous), Fizik ve Astronomi (çeşitli), channel cross section: branching ratio: measured, radiation: final-state interaction, Nükleer ve Yüksek Enerji Fiziği, Natural Sciences (SCI), branching ratio: measured [channel cross section], : 8000 GeV-cms, LHC, Natural Sciences, Particle Physics - Experiment, Atlas Detector, Nuclear and High Energy Physics, Higgs boson, Uzay bilimi, cms, Atlas detector, Properties, Weak Interactions, Abelian Gauge-theories, FOS: Physical sciences, Fizik, Hadron-hadron scattering, four-lepton decay channel, PHYSICS, statistical analysis, ASTRONOMİ VE ASTROFİZİK, ABELIAN GAUGE-THEORIES, ROOT-S=7 TEV, background, leptonic decay [Z0], MODEL, Higgs particle: mass: measured, Fizik Bilimleri, HADRON-HADRON COLLISIONS, Z0: leptonic decay, Patron distributions, mass: measured [Higgs particle], Massless particles, experimental results