Highly boosted dielectron identification in proton-proton collisions at √s = 13 TeV
Physical Review D, cilt.114, sa.5, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 114 Sayı: 5
- Basım Tarihi: 2026
- Doi Numarası: 10.1103/hb72-vjj6
- Dergi Adı: Physical Review D
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, INSPEC, MathSciNet, zbMATH
- Marmara Üniversitesi Adresli: Evet
Özet
A new technique is developed to identify dielectrons (e+e−) with Lorentz boost γL?> 20 that produce one single merged cluster in the electromagnetic calorimeter of the CMS detector. The identification uses two multivariate models: one for the case where both electron tracks are reconstructed, and another where only one of the tracks is reconstructed. The efficiency is determined using proton-proton collision data collected at a center-of-mass energy of 13 TeV. Boosted J=ψ mesons decaying into e+e− pairs are used to estimate the efficiency of the model with two tracks, yielding an overall efficiency of 80%. The Z → μþμ−γ events, where the photon converts into a collimated dielectron, are used for the model with a single track, yielding an efficiency of about 60%. A dedicated energy correction for dielectron candidates is also developed using B± → J=ψK± → e+e−K± data.