IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2014 vol. 231 p. 1 - 23
ISSN:
0031-9007
Resumen:
A search for evidence of invisible-particle decay modes of a Higgs boson produced in associationwith a Z boson at the Large Hadron Collider is presented. No deviation from the Standard Modelexpectation is observed in 4.5 fb−1 (20.3 fb−1 ) of 7 (8) TeV pp collision data collected by the ATLASexperiment. Assuming the Standard Model rate for ZH production, an upper limit of 75%, at the 95%confidence level is set on the branching ratio to invisible-particle decay modes of the Higgs boson ata mass of 125.5 GeV. The limit on the branching ratio is also interpreted in terms of an upper limit onthe allowed dark matter?nucleon scattering cross section within a Higgs-portal dark matter scenario.Limits are also set on an additional neutral Higgs boson, in the mass range 110 < mH < 400 GeV,produced in association with a Z boson and decaying to invisible particles.