Search for anomalous production of highly boosted Z bosons decaying to dimuons in pp collisions at sqrt(s) = 7 TeV

Abstract : Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to the dimuon final state. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at sqrt(s) = 7 TeV, corresponding to an integrated luminosity of 5.0 inverse femtobarns recorded with the CMS detector. The shape of the observed transverse-momentum distribution of Z bosons is consistent with standard-model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. For excited-quark decays involving only standard-model gauge bosons and coupling strengths, masses of excited quarks below 1.94 TeV are excluded at the 95% confidence level, assuming a compositeness scale equal to the excited-quark mass. For excited-quark production via novel contact interactions, masses below 2.22 TeV are excluded, even if the excited quarks do not couple to gluons.
docType_s : Journal articles
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http://hal.in2p3.fr/in2p3-00737938
Contributor : Florès Sylvie <>
Submitted on : Wednesday, October 3, 2012 - 7:00:33 AM
Last modification on : Wednesday, October 3, 2012 - 7:00:33 AM

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S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Search for anomalous production of highly boosted Z bosons decaying to dimuons in pp collisions at sqrt(s) = 7 TeV. Physics Letters B, Elsevier, 2013, 722, pp.28-47. <10.1016/j.physletb.2013.03.037>. <in2p3-00737938>

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