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Likelihood analysis of the minimal AMSB model.
Bagnaschi, E; Borsato, M; Sakurai, K; Buchmueller, O; Cavanaugh, R; Chobanova, V; Citron, M; Costa, J C; De Roeck, A; Dolan, M J; Ellis, J R; Flächer, H; Heinemeyer, S; Isidori, G; Lucio, M; Luo, F; Santos, D Martínez; Olive, K A; Richards, A; Weiglein, G.
Afiliação
  • Bagnaschi E; DESY, Notkestraße 85, 22607 Hamburg, Germany.
  • Borsato M; Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain.
  • Sakurai K; Science Laboratories, Department of Physics, Institute for Particle Physics Phenomenology, University of Durham, South Road, Durham, DH1 3LE UK.
  • Buchmueller O; Faculty of Physics, Institute of Theoretical Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland.
  • Cavanaugh R; High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK.
  • Chobanova V; Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 USA.
  • Citron M; Physics Department, University of Illinois at Chicago, Chicago, IL 60607-7059 USA.
  • Costa JC; Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain.
  • De Roeck A; High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK.
  • Dolan MJ; High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK.
  • Ellis JR; Experimental Physics Department, CERN, 1211 Geneva 23, Switzerland.
  • Flächer H; Antwerp University, 2610 Wilrijk, Belgium.
  • Heinemeyer S; ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, University of Melbourne, Melbourne, 3010 Australia.
  • Isidori G; Theoretical Particle Physics and Cosmology Group, Department of Physics, King's College London, London, WC2R 2LS UK.
  • Lucio M; Theoretical Physics Department, CERN, 1211 Geneva 23, Switzerland.
  • Luo F; H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL UK.
  • Santos DM; Campus of International Excellence UAM+CSIC, Cantoblanco, 28049 Madrid, Spain.
  • Olive KA; Instituto de Física Teórica UAM-CSIC, C/ Nicolas Cabrera 13-15, 28049 Madrid, Spain.
  • Richards A; Instituto de Física de Cantabria (CSIC-UC), Avda. de Los Castros s/n, 39005 Cantabria, Spain.
  • Weiglein G; Physik-Institut, Universität Zürich, 8057 Zurich, Switzerland.
Eur Phys J C Part Fields ; 77(4): 268, 2017.
Article em En | MEDLINE | ID: mdl-28515671
ABSTRACT
We perform a likelihood analysis of the minimal anomaly-mediated supersymmetry-breaking (mAMSB) model using constraints from cosmology and accelerator experiments. We find that either a wino-like or a Higgsino-like neutralino LSP, [Formula see text], may provide the cold dark matter (DM), both with similar likelihoods. The upper limit on the DM density from Planck and other experiments enforces [Formula see text] after the inclusion of Sommerfeld enhancement in its annihilations. If most of the cold DM density is provided by the [Formula see text], the measured value of the Higgs mass favours a limited range of [Formula see text] (and also for [Formula see text] if [Formula see text]) but the scalar mass [Formula see text] is poorly constrained. In the wino-LSP case, [Formula see text] is constrained to about [Formula see text] and [Formula see text] to [Formula see text], whereas in the Higgsino-LSP case [Formula see text] has just a lower limit [Formula see text] ([Formula see text]) and [Formula see text] is constrained to [Formula see text] in the [Formula see text] ([Formula see text]) scenario. In neither case can the anomalous magnetic moment of the muon, [Formula see text], be improved significantly relative to its Standard Model (SM) value, nor do flavour measurements constrain the model significantly, and there are poor prospects for discovering supersymmetric particles at the LHC, though there are some prospects for direct DM detection. On the other hand, if the [Formula see text] contributes only a fraction of the cold DM density, future LHC [Formula see text]-based searches for gluinos, squarks and heavier chargino and neutralino states as well as disappearing track searches in the wino-like LSP region will be relevant, and interference effects enable [Formula see text] to agree with the data better than in the SM in the case of wino-like DM with [Formula see text].

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Eur Phys J C Part Fields Ano de publicação: 2017 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Eur Phys J C Part Fields Ano de publicação: 2017 Tipo de documento: Article