Doubly Charged Lepton Search Potential of the FCC-Based Energy-Frontier Electron-Proton Colliders


ADVANCES IN HIGH ENERGY PHYSICS, vol.2020, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2020
  • Publication Date: 2020
  • Doi Number: 10.1155/2020/9234130
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, INSPEC, Metadex, zbMATH, Directory of Open Access Journals, Civil Engineering Abstracts
  • Ankara University Affiliated: Yes


We search for the doubly charged leptons (L--) predicted in composite models including extended weak isospin multiplets, namely, I-W = 1 and I-W = 3/2, at the Future Circular Collider- (FCC-) based energy-frontier electron-proton colliders with the center-of-mass energies of root s = 3.46 TeV, root s = 10 TeV, and root s = 31.6 TeV, respectively. We deal with the e(-)p -> L--X -> e(-)W(-)X process, calculate the production cross sections, and give the normalized transverse momentum and pseudorapidity distributions of final-state electron to obtain the kinematical cuts for the discovery. We show the statistical significance (SS) of the expected signal yield as a function of doubly charged lepton mass (SS - M-L plots) to attain the doubly charged lepton discovery mass limits for both the I-W = 1 and I-W = 3/2. It is obtained that discovery mass limits on the mass of doubly charged lepton for I-W = 1 (I-W = 3/2) are 2.21 (2.73) TeV, 5.46 (8.47) TeV, and 12.9 (20.0) TeV for root s = 3.46 TeV, root s = 10 TeV, and root s = 31.6 TeV, respectively.