Differences Between the Pole and On-Shell Masses and Widths of the Higgs Boson
نویسندگان
چکیده
The differences between the on-shell mass and width of the Higgs boson and their pole counterparts are evaluated in leading order. For a heavy Higgs boson, they are found to be sensitive functions of the gauge parameter and become numerically large over a class of gauges that includes the unitary gauge. For a light Higgs boson, the differences remain small in all gauges. The pinch-technique mass and width are found to be close to their pole counterparts over a large range of Higgs boson masses. PACS numbers: 11.15.Bt, 12.15.Lk, 14.80.Bn ∗Permanent address: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 Munich, Germany.
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