Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV

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dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbeling, K.
dc.contributor.authorAbicht, N.J.
dc.contributor.authorAbidi, S.H.
dc.contributor.authorAboulhorma, A.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbulaiti, Y.
dc.contributor.authorAbusleme Hoffman, A.C.
dc.contributor.authorAcharya, B.S.
dc.contributor.authorAdam Bourdarios, C.
dc.date.accessioned2023-10-19T15:26:36Z
dc.date.available2023-10-19T15:26:36Z
dc.date.issued2023-09
dc.descriptionIndexación: Scopus.es
dc.description.abstractA search for Majorana neutrinos in same-sign WW scattering events is presented. The analysis uses s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb - 1 recorded during 2015–2018 by the ATLAS detector at the Large Hadron Collider. The analysis targets final states including exactly two same-sign muons and at least two hadronic jets well separated in rapidity. The modelling of the main backgrounds, from Standard Model same-sign WW scattering and WZ production, is constrained with data in dedicated signal-depleted control regions. The distribution of the transverse momentum of the second-hardest muon is used to search for signals originating from a heavy Majorana neutrino with a mass between 50 GeV and 20 TeV. No significant excess is observed over the background expectation. The results are interpreted in a benchmark scenario of the Phenomenological Type-I Seesaw model. In addition, the sensitivity to the Weinberg operator is investigated. Upper limits at the 95% confidence level are placed on the squared muon-neutrino–heavy-neutrino mass-mixing matrix element | VμN| 2 as a function of the heavy Majorana neutrino’s mass mN , and on the effective μμ Majorana neutrino mass | mμμ|.es
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85171580591&origin=resultslist&sort=plf-f&src=s&nlo=&nlr=&nls=&sid=586dafe7e51e18ffd718fee68da1115b&sot=aff&sdt=cl&cluster=scofreetoread%2c%22all%22%2ct&sl=34&s=AF-ID%2860002636%29+AND+SUBJAREA%28ENGI%29&relpos=2&citeCnt=0&searchTerm=#topics-of-prominence
dc.identifier.citationEuropean Physical Journal C Open Access Volume 83, Issue 9 September 2023 Article number 824es
dc.identifier.doi10.1140/epjc/s10052-023-11915-y
dc.identifier.issn14346044
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/53507
dc.language.isoenes
dc.rights.licenseCC BY 4.0 DEED
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleSearch for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeVes
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