Testing grand unification at the CERN LHC and SLHC.
We examine the possibility of measuring the three gauge couplings at high scales at the Large Hadron Collider (LHC), in order to see the first steps as they run toward grand unification at much higher energies. Using the minimal supersymmetric standard model (MSSM) with sparticle masses of several hundred GeV as an example of a theory in which the couplings do unify at very high energies, we find that the processes pp{yields}l{sup +}{nu}, pp{yields}l{sup +}l{sup -}, and pp{yields}{gamma}j can be useful to discriminate the SM from the MSSM with masses at the few hundred GeV scale and determine that the couplings are converging at better than the SM prediction toward the GUT scale. Such measurements indirectly probe the existence of lower mass states, charged under the SM gauge groups, but which may be difficult to produce directly or extract from backgrounds at the LHC.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 915003
- Report Number(s):
- ANL-HEP-PR-07-21; PRVDAQ; TRN: US0804874
- Journal Information:
- Phys. Rev. D, Vol. 75, Issue Jun. 2007; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Spectrum of TeV particles in warped supersymmetric grand unification
Noncanonical MSSM, unification, and new particles at the CERN LHC