Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ+μ−. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fb−1recorded 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 TeVare excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeVare excluded, even if the excited quarks do not couple to gluons.

Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Aguilo, E., et al. (2013). Search for anomalous production of highly boosted Z bosons decaying to μ+μâ in proton-proton collisions at [Formula presented] TeV. PHYSICS LETTERS. SECTION B, 722(1-3), 28-47 [10.1016/j.physletb.2013.03.037].

Search for anomalous production of highly boosted Z bosons decaying to μ+μ−in proton-proton collisions at [Formula presented] TeV

Benaglia, A.;De Guio, F.;Di Matteo, L.;Fiorendi, S.;Ghezzi, A.;Manzoni, R. A.;Martelli, A.;Massironi, A.;Moroni, L.;Paganoni, M.;Ragazzi, S.;Tabarelli de Fatis, T.;Branca, A.;Govoni, P.;Dinardo, M. E.;
2013

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−. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fb−1recorded 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 TeVare excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeVare excluded, even if the excited quarks do not couple to gluons.
Articolo in rivista - Articolo scientifico
CMS; Dimuons; Excited quarks; New phenomena; Physics; Nuclear and High Energy Physics
English
2013
722
1-3
28
47
none
Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Aguilo, E., et al. (2013). Search for anomalous production of highly boosted Z bosons decaying to μ+μâ in proton-proton collisions at [Formula presented] TeV. PHYSICS LETTERS. SECTION B, 722(1-3), 28-47 [10.1016/j.physletb.2013.03.037].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/193088
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