Direct Measurement of the Top Quark Charge at Hadron Colliders

Details Direct Measurement of the Top Quark Charge at Hadron Colliders Direct Measurement of the Top Quark Charge at Hadron Colliders

2001-06-28

arxiv.org/abs/hep-ph/0106341v1

Phys.Rev. D64 (2001) 094019

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex, 24 pages, 2 tables, 9 figures

Scientific paper

10.1103/PhysRevD.64.094019

We consider photon radiation in tbar-t events at the upgraded Fermilab Tevatron and the CERN Large Hadron Collider (LHC) as a tool to measure the electric charge of the top quark. We analyze the contributions of tbar-t-gamma production and radiative top quark decays to p-p, pbar-p -> gamma l^+/- nu bbar-b jj, assuming that both b-quarks are tagged. With 20~fb^{-1} at the Tevatron, the possibility that the ``top quark'' discovered in Run I is actually an exotic charge -4/3 quark can be ruled out at the 95% confidence level. At the LHC, it will be possible to determine the charge of the top quark with an accuracy of about 10%.

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