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Prospects for measuring Vtb via s-channel single top at ATLAS

Dugan O'Neil1,3, Beatriz González Piñeiro2 and Michel Lefebvre1

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RESEARCH NOTES FROM COLLABORATION

The production of single top quarks via the electroweak interaction promises to provide new opportunities to both test the standard model and search for new physics. In particular, electroweak top production provides the only means to directly measure the CKM matrix element Vtb at ATLAS. The s-channel has the lowest rate, but is the best theoretically understood mechanism of electroweak top production. An evaluation of the potential for background suppression and Vtb measurement in this channel is presented. It is found that significant background suppression can be achieved and Vtb can be measured in the s-channel to a statistical precision of 2.8% after taking three years of low luminosity data (3 × 104 pb−1) at the large hadron collider.


PACS

13.85.Qk Inclusive production with identified leptons, photons, or other nonhadronic particles

11.55.-m S-matrix theory; analytic structure of amplitudes

12.15.-y Electroweak interactions

14.65.Ha Top quarks

12.40.Ee Statistical models

12.10.Dm Unified theories and models of strong and electroweak interactions

Subjects

Particle physics and field theory

Dates

Issue 10 ( 1 October 2002)

Received 17 June 2002

Published 17 September 2002



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