Test of the vector portal with dark fermions in the charge-exchange reactions in the NA64 experiment at CERN SPS
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Fecha
2024-04-01
Profesor/a Guía
Facultad/escuela
Idioma
en
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Editor
American Physical Society
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Licencia CC
CC BY 4.0 DEED
Attribution 4.0 International
Licencia CC
https://creativecommons.org/licenses/by/4.0/
Resumen
We 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.
Notas
Indexación: Scopus.
Palabras clave
Dark Matter, Missing Mass (Astrophysics), Darkness
Citación
Physical Review D Open Access Volume 109, Issue 71 April 2024 Article number 075021
DOI
10.1103/PhysRevD.109.075021