![]() ![]() This means that – as predicted by the Standard Model – the Higgs boson’s interactions with other particles do not change when “looking” in the CP mirror. Through these measurements, they confirmed that the Higgs boson has even charge-parity (CP). Researchers set out to determine the Higgs boson’s parity properties by measuring its decays to pairs of W bosons (H → WW*), Z bosons (H → ZZ*) and to photons (H → γγ). The blue histogram represents measured signal the shaded areas depict the total uncertainty. ![]() Data-to-simulation ratios are shown at the bottom of the plot. The signal and background yields are determined from the fit. The mirror image Figure 1: The weighted distribution of the azimuthal angle between two jets in the signal region used in the CP measurement. They’ve measured its mass to be around 125 GeV – that’s about 130 times the mass of the proton at rest – and found it has zero electric charge and spin. Since its discovery in 2012, researchers of the ATLAS and CMS experiments at CERN’s Large Hadron Collider (LHC) have tirelessly investigated the properties of the Higgs boson. ![]() While this mathematical formalism is relatively simple, its cornerstone – the Higgs boson – remained undetected for almost 50 years! To explain the masses of electroweak bosons – the W and Z bosons – theorists in the 1960s postulated a mechanism of spontaneous symmetry breaking. ![]()
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