Theoretical Bounds on New Four-Fermion Interactions and TeV Scale Physics

Details Theoretical Bounds on New Four-Fermion Interactions and TeV Scale Physics Theoretical Bounds on New Four-Fermion Interactions and TeV Scale Physics

2012-03-30

arxiv.org/abs/1203.6843v1

PoS(LATTICE 2011)272

Physics

High Energy Physics

High Energy Physics - Lattice

Talk presented at the XXIXth International Symposium on Lattice Field Theory, Squaw Valley, Lake Tahoe, California, USA, July

Scientific paper

The standard model weak interactions can be described by four-fermion V-A operators at low energies. New physics at the TeV scale can, however, generate the other Lorentz structures. In this talk, we review the constraints on such interactions from nuclear and hadronic decays, as well as from collider searches. Currently the most stringent bounds come from the analysis of the 0+ to 0+ nuclear and the pi to e nu gamma radiative pion decays. In the near future, the ultracold neutron beta decay experiments and the direct LHC measurements will compete in setting the most stringent bounds, provided, however, that the neutron-to-proton non-perturbative transition matrix elements can be calculated to a level of 10-20% accuracy.

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