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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/30684

Title: Discriminating between lepton number violating scalars using events with four and three charged leptons at the LHC
Authors: Águila Giménez, Francisco del
Chala, Mikael
Santamaria, Arcadi
Wudka, Jose
Issue Date: 2013
Abstract: Many Standard Model extensions predict doubly-charged scalars; in particular, all models with resonances in charged lepton-pair channels with non-vanishing lepton number; if these are pair produced at the LHC, the observation of their decay into l±l±W∓W∓ will be necessary in order to establish their lepton-number violating character, which is generally not straightforward. Nonetheless, the analysis of events containing four charged leptons (including scalar decays into one or two taus as well as into W bosons) makes it possible to determine whether the doubly-charged excitation belongs to a multiplet with weak isospin T = 0, 1/2, 1, 3/2 or 2 (assuming there are no excitations with charge > 2); though discriminating between the isosinglet and isodoublet cases is possible only if charged-current events cannot produce the doubly-charged isosinglet.
Sponsorship: This work has been supported in part by the Ministry of Economy and Competitiveness (MINECO), under the grant Nos. FPA2006-05294, FPA2010-17915 and FPA2011-23897, by the Junta de Andalucía grants FQM 101 and FQM 6552, by the “Generalitat Valenciana” grant PROMETEO/2009/128, and by the US Department of Energy grant No. DE-FG03-94ER40837. M.C. is supported by the MINECO under the FPU program.
Publisher: Elsevier
Keywords: Hadron colliders
Lepton
URI: http://hdl.handle.net/10481/30684
ISSN: 0370-2693
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Águila, F.; et al. Discriminating between lepton number violating scalars using events with four and three charged leptons at the LHC. Physics Letters B, 725(4-5): 310-315 (2013). [http://hdl.handle.net/10481/30684]
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