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APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 26
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Phys. Rev. Lett. 95, 261802 (2005) [4 pages]

QCD Corrections to Static Heavy-Quark Form Factors

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W. Bernreuther1, R. Bonciani2, T. Gehrmann3, R. Heinesch1, T. Leineweber1,*, P. Mastrolia4, and E. Remiddi5
1Institut für Theoretische Physik, RWTH Aachen, D-52056 Aachen, Germany
2Departament de Física Teòrica, IFIC, CSIC—Universitat de València, E-46071 València, Spain
3Institut für Theoretische Physik, Universität Zürich, CH-8057 Zürich, Switzerland
4Department of Physics and Astronomy, UCLA, Los Angeles, California 90095-1547, USA
5Dipartimento di Fisica dell’Università di Bologna and INFN, Sezione di Bologna, I-40126 Bologna, Italy

Received 29 September 2005; published 19 December 2005

Interactions of heavy quarks, in particular, of top quarks, with electroweak gauge bosons are expected to be very sensitive to new physics effects related to electroweak symmetry breaking. These interactions are described by the so-called static form factors, which include anomalous magnetic moments and the effective weak charges. We compute the second-order QCD corrections to these static form factors, which turn out to be sizable and need to be taken into account in searches for new anomalous coupling effects.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.261802
DOI:
10.1103/PhysRevLett.95.261802
PACS:
12.38.Bx, 12.15.Mm, 14.65.Fy, 14.65.Ha

*Present address: Framatome ANP GmbH, D-91050 Erlangen, Germany.

 
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