Strong Coupling Running, Gauge Coupling Unification and the Scale of New Physics

Abstract

The apparent unification of gauge couplings in Grand Unified Theories around 10${}^{16}$ GeV is one of the strong arguments in favor of Supersymmetric extensions of the Standard Model. In this paper, an analysis of the measurements of the strong coupling running from the CMS experiment at the LHC is combined with a "traditional" gauge coupling unification analysis using data at the Z peak. This approach places powerful constraints on the possible scales of new physics and on the parameters around the unification scale. A supersymmetric analysis without GUT threshold corrections describes the CMS data well and provides perfect unification. The favored scales are $M_{SUSY}=2820+670-540$ GeV and $M_{GUT}=1.05\pm 0.06\cdot 10^{16}$ GeV. For zero or small threshold corrections the scale of new physics may be well within LHC reach.

11 pages, 4 figures, 2 tables

References in corpus (6)

• Big-Bang Nucleosynthesis
• Measurement of the inclusive 3-jet production differential cross section in proton-proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range
• Measurement of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section in pp collisions at sqrt(s) = 7 TeV and first determination of the strong coupling constant in the TeV range
• Constraints on parton distribution functions and extraction of the strong coupling constant from the inclusive jet cross section in pp collisions at sqrt(s) = 7 TeV
• Constraining new coloured matter from the ratio of 3- to 2-jets cross sections at the LHC
• Gauge Coupling Unification, SUSY Scale and Strong Coupling Running

Cited by in corpus (7)

• Global fits of GUT-scale SUSY models with GAMBIT
• A global fit of the MSSM with GAMBIT
• Determination of the strong coupling constant ${\alpha }_S(m_{\mathrm{Z}})$ from measurements of inclusive W${}^{\pm }$ and Z boson production cross sections in proton-proton collisions at $\sqrt{s}=$ 7 and 8 TeV
• Testing the nature of Dark Energy with Precision Cosmological constraints
• Bound Dark Energy: towards understanding the nature of the Dark Energy
• Unification of Force and Substance
• Anomalies and parities for quintessential and ultra-light axions