• Josef Pradler

    Group Leader Theory Dark Matter
    Location: Wohllebengasse, 2A01
    Phone: +43 1 51581 - 2811

Research interests

Much of my research efforts revolve around finding novel signatures of physics beyond the Standard Model and to devise strategies to experimentally test them. I deem such work as very important as it creates new perspectives and science cases for existing and future experiments. I am also thrilled by the prospect that a non-gravitational detection of Dark Matter and a conclusive test of the paradigm is a realistic possibility within the next decade. Therefore, I am pushing my research towards the exploration of laboratory tests of Dark Matter.

The physics of the early Universe, and, in particular, the physics framework of Big Bang Nucleosynthesis are further active lines of my research. I am interested in exploring various generation mechanisms of Dark Matter and to look for cosmological signatures of the hidden sector. Upcoming precision determinations of deuterium and helium abundances, together with the still unsolved cosmological lithium problem keeps primoridal nucleosynthesis a most important window to test for deviations from Standard Model during those first seconds after the big bang.

Biographical sketch




Grants and Scholarships

  • since April 2016 EU COST action "Connecting Insights in Fundamental Physics" member
  • since June 2014 New Frontiers Group Grant by the Austrian Academy of Sciences
  • 2006 - 2009 International Max Planck Research School on Elementary Particle Physics
  • 2002 & 2003 Scholarship for distinguished achievements by the University of Vienna


PhD Students

  • Lukas Semmelrock, since June 2016

Master Students

  • Christina Xeni, since July 2016
  • Lukas Semmelrock (03/2015 - 05/2016)


Courses at the University of Vienna

Lecturer at international schools

  • DK Indian-Summer School 2015, Internationale Academy Traunkirchen; Lectures on Dark Matter and Cosmology

Selected publications

Probing sub-GeV Dark Matter with conventional detectors

Chris Kouvaris, Josef Pradler, Phys.Rev.Lett. 118 (2017) 031803

Light Particle Solution to the Cosmic Lithium Problem

Andreas Goudelis, Maxim Pospelov, Josef Pradler, Phys.Rev.Lett. 116 (2016) 211303

Direct Detection Constraints on Dark Photon Dark Matter

Haipeng An, Maxim Pospelov, Josef Pradler, Adam Ritz, Phys.Lett. B747 (2015) 331-338

Dark energy from the string axiverse

Marc Kamionkowski, Josef Pradler, Devin G. E. Walker, Phys.Rev.Lett. 113 (2014) 251302

Cosmological Constraints on Very Dark Photons

Josef Pradler, Anthony Fradette, Maxim Pospelov, Josef Pradler, Adam Ritz, Phys.Rev. D90 (2014) 035022

Silk damping at a redshift of a billion: a new limit on small-scale adiabatic perturbations

Donghui Jeong, Josef Pradler, Jens Chluba, Marc Kamionkowski, Phys.Rev.Lett. 113 (2014) 061301

New stellar constraints on dark photons

Haipeng An, Maxim Pospelov, Josef Pradler, Phys.Lett. B725 (2013) 190-195

Dark Matter Detectors as Dark Photon Helioscopes

Haipeng An, Maxim Pospelov, Josef Pradler, Phys.Rev.Lett. 111 (2013) 041302

On an unverified nuclear decay and its role in the DAMA experiment

Josef Pradler, Balraj Singh, Itay Yavin, Phys.Lett. B720 (2013) 399-404

Direct constraints on charged excitations of dark matter

Haipeng An, Maxim Pospelov, Josef Pradler, Phys.Rev.Lett. 109 (2012) 251302

Primordial beryllium as a big bang calorimeter

Maxim Pospelov, Josef Pradler, Phys.Rev.Lett. 106 (2011) 121305

Big Bang Nucleosynthesis as a Probe of New Physics

Maxim Pospelov, Josef Pradler, Ann.Rev.Nucl.Part.Sci. 60 (2010) 539-568

Selected presentations

New Pathways for Physics Beyond the Standard Model, University of California Berkeley, USA

How to break a no-go theorem in direct detection (Eingeladener Konferenzvortrag), 17-06-16

Cosmological Probes of Fundamental Physics, Weizmann Institute of Science, Israel

Big Bang Nucleosynthesis as a Probe of New Physics (Eingeladener Konferenzvortrag), 09-06-16

Stanford University, USA

Dark Photons Dark Matter, Dark Axions Dark Energy (Seminarvortrag), 23-03-15

Beyond WIMPs: From Theory to Detection, Hagoshrim, Israel

Dark Photon Dark Matter: Theory and Constraints (Eingeladener Konferenzvortrag), 31-05-15, PDF

Gran Sasso National Laboratory, Assergi, Italy

New Opportunities for Dark Matter Experiments (Kolloquium), 10-03-15, PDF

Perimeter Institute for Theoretical Physics, Waterloo, Canada

Astrophysical and cosmological aspects of feebly-interacting light species (Eingeladener Konferenzvortrag), 17-06-14

University of California Berkeley, USA

The Universe at redshift one billion: a cosmic particle physics lab (Seminarvortrag), 17-03-14

Institute for Advanced Study, Princeton, USA

Dark Photons in Cosmology, Astrophysics, and Experiment (Seminarvortrag), 14-05-13

Further Information

A complete list of publications and preprints can be found on inspirehep.