Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at √s=13TeV
Yazarlar (1)
Prof. Dr. Hasan OĞUL Sinop Üniversitesi, Türkiye
Makale Türü Açık Erişim Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Physics Letters Section B Nuclear Elementary Particle and High Energy Physics (Q1)
Dergi ISSN 0370-2693 Dergi Bilgileri (2024)
Makale Dili İngilizce Basım Tarihi 05-2024
Cilt / Sayı / Sayfa 852 / 1 / 138582–0 DOI 10.1016/j.physletb.2024.138582
Makale Linki https://www.sciencedirect.com/science/article/pii/S0370269324001400
UAK Araştırma Alanları
Fen Bilimleri ve Matematik
Özet
A search for an exotic decay of the Higgs boson to a Z boson and a light pseudoscalar particle (a), decaying to a pair of leptons and a pair of photons, respectively, is presented. The search is based on proton-proton collision data at a center-of-mass energy of s= 13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb− 1. The analysis probes pseudoscalar masses m a between 1 and 30 GeV, leading to two pairs of well-isolated leptons and photons. Upper limits at 95% confidence level are set on the Higgs boson production cross section times its branching fraction to two leptons and two photons. The observed (expected) limits are in the range of 1.1–17.8 (1.7–17.9) fb within the probed m a interval. An excess of data above the expected standard model background with a local (global) significance of 2.6 (1.3) standard deviations is observed for a mass hypothesis …
Anahtar Kelimeler
Axion like particles | CMS | Higgs