Author:
Obikhod Tetiana,Petrenko Evgenii
Abstract
A search for dark matter produced in association with a Higgs boson in final states with two 𝜏-leptons and missing transverse momentum, pp→A→ahτ+τ- is presented. The corresponding experimental analysis between 2015–2018 years used 139 fb−1 of proton–proton collision data at √s = 13 TeV collected by the ATLAS experiment at the LHC. The results are interpreted in terms of a 2HDM+a model with physics beyond the Standard Model featuring two scalar Higgs doublets and a pseudoscalar singlet field. Two sets of parameters, derived from experimental exclusion limits, for calculating the axions and bosons production cross sections were selected using the MADGRAPH5@NLO computer program. The obtained information, together with kinematic constraints on the transverse momentum and angular distribution of axions and bosons, allows us to conclude about the existence of CP-odd Higgs bosons with a mass in the region of 400 GeV and a dark matter candidate, the axion, with a mass of up to 200 GeV.
Publisher
Problems of Atomic Science and Technology
Reference8 articles.
1. E. Corbelli and P. Salucci. The extended rotation curve and the dark matter halo of M33 // Monthly Notices of the Royal Astronomical Society. 2000, v. 311, N 01, p. 441-447.
2. G. Hinshaw et al. Nine-year wilkinson microwave anisotropy probe observations: Cosmological parameter results // The Astrophysical Journal Supplement Series. 2013, v. 208, p. 19.
3. V. Trimble. Existence and nature of dark matter in the universe // Annual Review of Astronomy and Astrophysics. 1987, v. 25, N 1, p. 425-472.
4. ATLAS collaboration. Measurement of light-by-light scattering and search for axion-like particles with 2.2 nb-1 of pb+pb data with the atlas detector // Journal of High Energy Physics. 2021, v. 2021, p. 243.
5. D. Abercrombie et al. Dark matter benchmark models for early lhc run-2 searches: Report of the atlas/cms dark matter forum // Physics of the Dark Universe. 2020, v. 27, p. 100371.