Higgs couplings and properties with the ATLAS detector at the LHC
Bibliographic record
Abstract
A review of the latest results on the main properties of the Higgs boson using the decay channels $\\ensuremath{H{\\rightarrow\\,}\\gamma\\gamma}$, $\\ensuremath{H {\\rightarrow\\,} WW^{(\\ast)}{\\rightarrow\\,} l\\nu l \\nu }$, $\\ensuremath{H{\\rightarrow\\,}ZZ^{(\\ast)}}{\\rightarrow\\,}4l$, $\\ensuremath{H{\\rightarrow\\,}b\\bar{b}}$ and $\\ensuremath{H{\\rightarrow\\,}\\tau\\tau}$ with the ATLAS experiment at the CERN Large Hadron Collider at center-of-mass energies of $\\sqrt{s}=7~\\tev$ and $\\sqrt{s}=8~\\tev$ is presented. The analyzed dataset, collected in 2011 at center-of-mass energy of $\\sqrt{s}=7~\\tev$ and in 2012 at $\\sqrt{s}=8~\\tev$, corresponds to an integrated luminosity of approximately 25 fb$^{-1}$ of pp collisions. % The measurements discussed will be the mass, couplings properties and main quantum numbers in these channels through various production processes. The combined mass measurements using the decays channels $\\ensuremath{H{\\rightarrow\\,}ZZ^{(\\ast)}}{\\rightarrow\\,}4l$ and $\\ensuremath{H{\\rightarrow\\,}\\gamma\\gamma}$, gives a mass value of $m_H=125.5\\pm 0.2 \\text{ (stat) } ^{+0.5}_{-0.6}\\text{ (sys) } $. The results on the Higgs boson spin and quantum numbers obtained using all the three bosonic decay channels provide evidence for the spin$-$0 nature of the Higgs boson, with positive parity being strongly preferred. Evidence for Higgs decaying to fermions is found at $3.7\\sigma$ level combining the newly available channels $\\ensuremath{H{\\rightarrow\\,}b\\bar{b}}$ and $\\ensuremath{H{\\rightarrow\\,}\\tau\\tau}$. The combination of the Higgs decays channel results in a signal strength of $\\mu = 1.30\\pm 0.12 \\text{ (stat) }^{+0.14}_{-0.11}\\text{ (sys) } $ at a Higgs boson mass of $125.5$ GeV. The measurements of the production and decay mode specific signal strengths and the Higgs boson coupling determinations in various benchmark models show good agreement with the Standard Model Higgs boson hypothesis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.004 | 0.009 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.008 | 0.006 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".