Show simple item record

dc.contributor.authorKhachatryan, Vardan
dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.R.
dc.contributor.authorAdam, Wolfgang
dc.contributor.authorBergauer, Thomas
dc.contributor.authorDragicevic, Marko
dc.contributor.authorBaarmand, Marc M.
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorKalakhety, Hamali
dc.contributor.authorYumiceva, Francisco
dc.date.accessioned2015-09-30T13:26:42Z
dc.date.available2015-09-30T13:26:42Z
dc.date.issued2015-03-18
dc.identifier.citationKhachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., ... & D’Hondt, J. (2015). Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at s= 8 TeV. Physical Review D, 91(5), 052012.en_US
dc.identifier.urihttp://hdl.handle.net/11141/760
dc.description.abstractA search is performed for long-lived particles that decay into final states that include a pair of electrons or a pair of muons. The experimental signature is a distinctive topology consisting of a pair of charged leptons originating from a displaced secondary vertex. Events corresponding to an integrated luminosity of 19.6(20.5)fb-1 in the electron (muon) channel were collected with the CMS detector at the CERN LHC in proton-proton collisions at s=8TeV. No significant excess is observed above standard model expectations. Upper limits on the product of the cross section and branching fraction of such a signal are presented as a function of the long-lived particle's mean proper decay length. The limits are presented in an approximately model-independent way, allowing them to be applied to a wide class of models yielding the above topology. Over much of the investigated parameter space, the limits obtained are the most stringent to date. In the specific case of a model in which a Higgs boson in the mass range 125-1000GeV/c2 decays into a pair of long-lived neutral bosons in the mass range 20-350GeV/c2, each of which can then decay to dileptons, the upper limits obtained are typically in the range 0.2-10 fb for mean proper decay lengths of the long-lived particles in the range 0.01-100 cm. In the case of the lowest Higgs mass considered (125GeV/c2), the limits are in the range 2-50 fb. These limits are sensitive to Higgs boson branching fractions as low as 10-4.en_US
dc.language.isoen_USen_US
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.titleSearch for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at s =8TeVen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevD.91.052012


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution
of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.
Except where otherwise noted, this item's license is described as Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.