Universidad de Granada Digibug

Repositorio Institucional de la Universidad de Granada >
1.-Investigación >
Departamentos, Grupos de Investigación e Institutos >
Departamento de Física Teórica y del Cosmos >
DFTC - Artículos >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/30673

Title: Heavy neutrino signals at large hadron colliders
Authors: Águila Giménez, Francisco del
Aguilar-Saavedra, Juan Antonio
Pittau, Roberto
Issue Date: 2007
Abstract: We study the LHC discovery potential for heavy Majorana neutrino singlets in the process pp -> W+ -> l+ N -> l+ l+ jj (l=e,mu) plus its charge conjugate. With a fast detector simulation we show that backgrounds involving two like-sign charged leptons are not negligible and, moreover, they cannot be eliminated with simple sequential kinematical cuts. Using a likelihood analysis it is shown that, for heavy neutrinos coupling only to the muon, LHC has 5 sigma sensitivity for masses up to 200 GeV in the final state mu+- mu+- jj. This reduction in sensitivity, compared to previous parton-level estimates, is driven by the ~ 10^2-10^3 times larger background. Limits are also provided for e+- e+- jj and e+- mu+- jj final states, as well as for Tevatron. For heavy Dirac neutrinos the prospects are worse because backgrounds involving two opposite charge leptons are much larger. For this case, we study the observability of the lepton flavour violating signal e+- mu-+ jj. As a by-product of our analysis, heavy neutrino production has been implemented within the ALPGEN framework.
Publisher: IOP Publishing
Keywords: Neutrino physics
Beyond standard model
Hadronic colliders
URI: http://hdl.handle.net/10481/30673
ISSN: 1029-8479
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Águila, F.; Aguilar-Saavedra, J.A.; Pittau, R. Heavy neutrino signals at large hadron colliders. Journal of High Energy Physics, 10: 047 (2007). [http://hdl.handle.net/10481/30673]
Appears in Collections:DFTC - Artículos

Files in This Item:

File Description SizeFormat
Aguila_HeavyNeutrino.pdf1.75 MBAdobe PDFView/Open
Recommend this item

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! OpenAire compliant DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard - Feedback

© Universidad de Granada