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Supersymmetric correction to top quark pair production near threshold

Su, Shufang and Wise, Mark B. (2001) Supersymmetric correction to top quark pair production near threshold. Physics Letters B, 510 (1-4). pp. 205-210. ISSN 0370-2693. doi:10.1016/S0370-2693(01)00609-8.

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We studied the leading supersymmetric contribution to top–antitop threshold production using the NRQCD framework. The one-loop matching to the potential and the Wilson coefficient of the leading ^3S_1 production current were considered. We point out that the leading correction to the potential is zero due to SU(3)_c gauge invariance. This is true in general for any new physics that enters above the electroweak scale. The shape of the top quark pair production cross section is therefore almost unaffected near threshold, allowing a precise determination of the top quark mass based on the Standard Model calculations. The supersymmetric correction to the Wilson coefficient c_1 of the production current decouples for heavy super particles. Its contribution is smaller than the Standard Model next-to-next-leading-log results.

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Additional Information:© 2001 Elsevier Science B.V. Received 26 April 2001, Accepted 8 May 2001, Available online 12 June 2001. Editor: H. Georgi. We would like to thank I. Stewart for useful discussion on tt̄ threshold production. S.S. and M.B.W. are supported by the DOE under grant DE-FG03-92-ER-40701.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER-40701
Issue or Number:1-4
Classification Code:PACS: 14.65.Ha; 12.60.Jv; 12.38.Bx
Record Number:CaltechAUTHORS:20170823-083734394
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Official Citation:Shufang Su, Mark B. Wise, Supersymmetric correction to top quark pair production near threshold, Physics Letters B, Volume 510, Issue 1, 2001, Pages 205-210, ISSN 0370-2693, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80727
Deposited By: Ruth Sustaita
Deposited On:23 Aug 2017 16:05
Last Modified:15 Nov 2021 19:38

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