FCC Physics Opportunities

Superstring-inspired particle cosmology: inflation, neutrino masses, leptogenesis, dark matter & the SUSY scale

“…This and the correct CDM density can be reconciled for ∆ ∼ 10 4 and sparticle masses 10 TeV. This would explain why sparticles have not been detected at the LHC, whilst leaving open the possibility of detecting them at a future 100-TeV proton-proton collider such as FCC-hh [14]. Finally, Section 8 summarizes our conclusions.…”

Sensitivity of future hadron colliders to leptoquark pair production in the di-muon di-jets channel

“…We hope that the results of our study will be useful for the current European Strategy in Particle Physics [69] and provide a part of the physics case for future hadron colliders [36][37][38][39].…”

“…One potential future LHC upgrade would be to insert 16 Tesla magnets into the current LHC ring, resulting in the high energy LHC (HE-LHC), running at a nominal energy of 27 TeV with a design integrated luminosity of 15 ab −1 [37]. Ultimately, such magnets could be placed within a much larger tunnel, resulting in the Future Circular Collider, which could collide protons (FCC-hh) at a centre of mass energy √ s = 100 TeV with a design luminosity of 20 ab −1 [38,39]. We arrive at the question central to this paper, which is:…”

Taming of preasymptotic small x evolution within resummation framework

“…The gluon Green's function needs to be convoluted with the impact factors, which will provide for the suitable initial conditions for the evolution. The predictions will be made for the energies which potentially could be achieved in the future high energy e + e − machines, for example like planned FCC-ee [56,57] or CLIC [58,64]. The diagram for the process of the γ * γ * scattering is indicated in Fig.…”

“…For the purpose of this analysis, we shall consider γ * γ * scattering [12,13]. Such process could be realized in the future e + e − collider, such as FCC-ee [56,57], or CLIC [58], with doubly tagged electrons in the final state. We compute this process using the BFKL resummed solution, and quantify the length of the preasymptotic regime.…”