Probing the Higgs field using massive particles as sources and detectors
Physics Department, Northeastern University, 110 Forsyth Street, Boston, MA, 02115, USA
2 Physics Department and INFN, University of Perugia, Perugia, Italy
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Published online: 24 October 2006
In the standard model, all massive elementary particles acquire their masses by coupling to a background Higgs field with a non-zero vacuum expectation value. What is often overlooked is that each massive particle is also a source of the Higgs field. A given particle can in principle shift the mass of a neighboring particle. The mass shift effect goes beyond the usual perturbative Feynman diagram calculations which implicitly assume that the mass of each particle is rigidly fixed. Local mass shifts offer a unique handle on Higgs physics since they do not require the production of on-shell Higgs bosons. We provide theoretical estimates showing that the mass shift effect can be large and measurable, especially near pair threshold, at both the Tevatron and the LHC.
© Springer-Verlag Berlin Heidelberg, 2006