Higgs Boson Decay Channels: Statistical Analysis of LHC Run-3 Data
Physicists study the Higgs boson through its various decay channels. These decays reveal how the particle interacts with other fundamental particles. Researchers at the Large Hadron Collider (LHC) perform detailed statistical analyses on Run-3 data to test Standard Model predictions.
First, the ATLAS and CMS experiments collect proton-proton collision data at 13.6 TeV. Run-3 provides higher luminosity and more events than previous runs. As a result, scientists achieve greater precision in measuring rare decay processes.
Next, the most common decay channels include H → bb (bottom quarks), H → WW, H → ττ, and H → ZZ. These channels have larger branching ratios. Moreover, researchers analyze golden channels such as H → γγ (two photons) and H → ZZ → 4ℓ. These channels offer clean signatures and high signal-to-background ratios.
In addition, rare decays attract special attention. The H → μμ channel occurs in only about 1 in 5000 Higgs bosons. Run-3 data has strengthened evidence for this decay and reduced uncertainties. Similarly, the H → Zγ decay proceeds through a loop of virtual particles. Recent combined analyses show improved sensitivity and results consistent with Standard Model expectations.
Furthermore, scientists apply advanced statistical methods. They use maximum likelihood fits, multivariate analysis, and machine learning techniques. These tools separate signal events from background noise effectively. Consequently, measurements of signal strength (μ) and branching fractions become more accurate.
Moreover, Run-3 analyses combine data with previous Run-2 results. This approach increases the total dataset size significantly. For example, studies of Higgs pair production (HH) in channels like bbγγ now reach better sensitivity. The results remain consistent with Standard Model predictions while tightening constraints on new physics.
At the same time, challenges persist. Background processes can mimic Higgs signals. Therefore, physicists develop sophisticated simulation models and calibration techniques to control systematic uncertainties.
Finally, statistical analysis of LHC Run-3 data continues to refine our understanding of the Higgs boson. It confirms the particle’s properties align closely with theory. At the same time, it opens doors to search for subtle deviations that could point to physics beyond the Standard Model. As more data arrives, these analyses will deliver even greater precision and deeper insights into the fundamental forces of nature.