Test of the vector portal with dark fermions in the charge-exchange reactions in the NA64 experiment at CERN SPS

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dc.contributor.authorGninenko, Sergei N.
dc.contributor.authorKirpichnikov, Dmitry V.
dc.contributor.authorKuleshov, Sergey
dc.contributor.authorLyubovitskij, Valery E.
dc.contributor.authorZhevlakov, Alexey S.
dc.date.accessioned2024-04-30T15:48:52Z
dc.date.available2024-04-30T15:48:52Z
dc.date.issued2024-04-01
dc.descriptionIndexación: Scopus.
dc.description.abstractWe consider an experiment to search for dark sector particles in invisible (or semi-invisible) decays of neutral mesons M0=π0, η, η′, ω, f2(1270), which produced the charge-exchange reactions π-+(A,Z)→M0+(A,Z-1);M0→ invisible of high-energy pions (or kaons) on a nuclei target in the NA64 experiment at the CERN SPS. This reaction chain would lead to a striking signature of the signal event - the complete disappearance of the beam energy in the setup [Phys. Rev. D 91, 015004 (2015)PRVDAQ1550-799810.1103/PhysRevD.91.015004]. Using data obtained from the measurements at IHEP (Protvino) and Fermilab (Batavia) we show that the integral cross sections σ for the production of the M0 s slightly deviate from the phenomenological formula σ∼Z2/3, where Z is the nuclei charge. In particular, we present the formulas for the differential and integral cross sections that explicitly depend on the Mandelstam and Z variables. Derived formulas are used to predict the M0 yield as a function of beam energy for several target nuclei, and to estimate the projection sensitivity for the proposed search in the dark vector portal model. Sensitivity to different decay modes of M0s is explored.
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85190428991&origin=resultslist&sort=plf-f&src=s&nlo=&nlr=&nls=&sid=1e87d1cc09949432c250911d413dd70c&sot=aff&sdt=cl&cluster=scofreetoread%2c%22all%22%2ct&sl=61&s=AF-ID%28%22Universidad+Andr%c3%a9s+Bello%22+60002636%29+AND+SUBJAREA%28PHYS%29&relpos=7&citeCnt=0&searchTerm=
dc.identifier.citationPhysical Review D Open Access Volume 109, Issue 71 April 2024 Article number 075021
dc.identifier.doi10.1103/PhysRevD.109.075021
dc.identifier.issn24700010
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/56489
dc.language.isoen
dc.publisherAmerican Physical Society
dc.rights.licenseCC BY 4.0 DEED Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectDark Matter
dc.subjectMissing Mass (Astrophysics)
dc.subjectDarkness
dc.titleTest of the vector portal with dark fermions in the charge-exchange reactions in the NA64 experiment at CERN SPS
dc.typeArtículo
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