Measurement of tau polarization in W -> tau nu decays with the ATLAS detector in pp collisions at root s=7 TeV
2012 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 72, no 7, 2062- p.Article in journal (Refereed) Published
In this paper, a measurement of tau polarization in W -> tau nu decays is presented. It is measured from the energies of the decay products in hadronic tau decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb(-1), were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the tau polarization is P-tau = -1.06 +/- 0.04 (stat)(-0.07)(+0.05) (syst), in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [-1,-0.91]. Measurements of tau polarization have not previously been made at hadron colliders.
Place, publisher, year, edition, pages
2012. Vol. 72, no 7, 2062- p.
IdentifiersURN: urn:nbn:se:uu:diva-182917DOI: 10.1140/epjc/s10052-012-2062-6ISI: 000307269400009OAI: oai:DiVA.org:uu-182917DiVA: diva2:561383
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-012-2062-62012-10-182012-10-182013-07-04Bibliographically approved