2022/01/10 by Goran Kačarević, G. Kacarevic, I. Bozovic Jelisavcic +19
Computer Science · Physics and Astronomy · #Astrophysics #Boson #Branching fraction #Computational Physics and Python Applications #Coupling (piping) #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Luminosity #Massless particle #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Physics beyond the Standard Model #Quantum mechanics #Standard Model (mathematical formulation) #hep-ex #hep-ph #physics.acc-ph
paper · pdf · doi:10.1103/physrevd.105.092009
published in arXiv (Cornell University) 105(9) (Cornell University)
arxiv created 2022/01/10 · openalex publication_date 2022/01/10 · openalex created_date 2022/05/05 · arxiv updated 2022/06/01 · openalex updated_date 2026/08/08
In this paper we address the potential of a 3 TeV centre-of-mass energy Compact Linear Collider (CLIC) to measure the branching fraction of the Higgs boson decay to two photons, BR(H→γγ). Since photons are massless, the Higgs boson coupling to photons is realized through higher order processes involving heavy particles either from the Standard Model or beyond. Any deviation of the measured BR(H→γγ), and consequently of the Higgs coupling gHγγ from the predictions of the Standard Model, may indicate New Physics. The Higgs decay to two photons is thus an interesting probe of the Higgs sector. This study is performed using simulation of the detector for CLIC and by considering all relevant physics and beam-induced processes in a full reconstruction chain. It is shown that the product of the Higgs production cross-section in W+W- fusion and BR(H→γγ) can be measured with a relative statistical uncertainty of 5.5%, assuming the integrated luminosity of 5 ab-1 and unpolarized beams.