Probing hidden leptonic scalar portals using the NA64 experiment at CERN

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dc.contributor.authorPonten A.
dc.contributor.authorSieber H.
dc.contributor.authorOberhauser, B. Banto
dc.contributor.authorCrivelli P.
dc.contributor.authorKirpichnikov D.
dc.contributor.authorGninenko S.N.
dc.contributor.authorHösgen M.
dc.contributor.authorBueno, L. Molina
dc.contributor.authorMongillo M.
dc.contributor.authorZhevlakov A.
dc.date.accessioned2024-12-10T16:42:18Z
dc.date.available2024-12-10T16:42:18Z
dc.date.issued2024-10
dc.descriptionIndexación: Scopus.
dc.description.abstractIn this study, we demonstrate the potential of the NA64 experiment at CERN SPS to search for New Physics processes involving e→μ transitions after the collision of 100 GeV electrons with target nuclei. A new Dark Sector leptonic portal in which a scalar boson φ could be produced in the lepton-flavor-changing bremsstrahlung-like reaction, eN→μNφ, is used as benchmark process. In this work, we develop a realistic Monte Carlo simulation of the NA64 experimental setup implementing the differential and total production cross-section computed at exact tree-level and applying the Weiszäcker–Williams phase space approximation. Using this framework, we investigate the main background sources and calculate the expected sensitivity of the experiment. The results indicate that with minor setup optimization, NA64 can probe a large fraction of the available parameter space compatible with the muon g-2 anomaly and the Dark Matter relic predictions in the context of a new Dark Sector leptonic portal with 1011 EOT. This result paves the way to the exploration of lepton-flavour-changing transitions in NA64.
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85206250613&origin=resultslist&sort=plf-f&src=s&sid=5c113630fb7a8e96da2a475f933917ba&sot=aff&sdt=cl&cluster=scosubjabbr%2C%22PHYS%22%2Ct%2C%22EART%22%2Ct%2C%22CHEM%22%2Ct%2C%22ENGI%22%2Ct%2C%22MATE%22%2Ct%2Bscosubtype%2C%22ar%22%2Ct%2Bscofreetoread%2C%22all%22%2Ct&s=AF-ID%2860002636%29+AND+SUBJAREA%28PHYS%29&sl=34&sessionSearchId=5c113630fb7a8e96da2a475f933917ba&relpos=22
dc.identifier.citationEuropean Physical Journal C Open Access Volume 84, Issue 10 October 2024 Article number 1035
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/62506
dc.language.isoen
dc.publisherSpringer Nature
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectBenchmarking
dc.subjectBosons
dc.subjectColliding beam accelerators
dc.subjectDark Matter
dc.subjectPhotons
dc.subjectPositive ions
dc.titleProbing hidden leptonic scalar portals using the NA64 experiment at CERN
dc.typeArtículo
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