Search for: All records

We consider$$Z'$$$Z^{\prime }$s in heterotic string derived models and study$$Z'$$$Z^{\prime }$resonant production at the TeV scale at the Large Hadron Collider (LHC). We use various kinematic differential distributions for the Drell–Yan process at NNLO in QCD to explore the parameter space of such models and investigate$$Z'$$$Z^{\prime }$couplings. In particular, we study the impact ofZ-$$Z'$$$Z^{\prime }$kinetic-mixing interactions on forward-backward asymmetry ($$A_{FB}$$$A_{\mathrm{FB}}$) and other distributions at the LHC.

 

The future of collider physics is under investigation. With the High Luminosity LHC program lasting until the late 2030s, the next machine in the energy frontier is envisioned to appear in 30-40 years, which may be too far into the future to sustain the field. In this paper we explore the physics potential of an Upgraded Superconducting Super Collider (USSC). The Original Superconducting Super Collider (OSSC) was planned to operate at 20 TeV beam energy, and with improved magnet technology and/or longer tunnel, one may envision that it can be extended to 25-30 TeV beam energy. Given that the decision on the OSSC construction took place in Autumn 1988 and it was planned to start operation in the 1996-1999 period, an USSC can be constructed 10-15 years from construction and fill the gap between the end of HL-LHC and the future envisioned machines. While the main mission of the USSC will be to test the Standard Model and its electroweak and strongly interacting sectors, as a specific example we illustrate the invariant mass distribution at NNLO in QCD for a 5 TeV Z′ in the string derived Z′ model. 

We investigate the impact of sterile neutrinos on the decay rate of extra$$Z'$$$Z^{\prime }$s with mass in the TeV range in heterotic string derived models. We explore the impact of sterile neutrinos on the current$$Z'$$$Z^{\prime }$mass exclusion limits at the LHC, and how these bounds change when the parameter space of this specific class of models is modified.