Search for anomalous production of highly boosted Z bosons decaying to dimuons in pp collisions at s√=7 TeV
(2013) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 722, n° 1-3, p. 28-47 (2013)
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- Abstract
- Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ+μ−μ+μ−. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at View the MathML sources=7 TeV, corresponding to an integrated luminosity of 5.0 fb−15.0 fb−1 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. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeV are excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeV are excluded, even if the excited quarks do not couple to gluons.
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CMS Collaboration, Quertenmont, L., Basegmez, S., Bruno, G., Castello, R., Ceard, L., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Hollar, J., Lemaitre, V., Liao, J., Militaru, O., Nuttens, C., Pagano, D., Pin, A., Piotrzkowski, K., et al. (2013). Search for anomalous production of highly boosted Z bosons decaying to dimuons in pp collisions at s√=7 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 722(1-3), 28-47. https://doi.org/10.1016/j.physletb.2013.03.037 (Original work published 2013)