Academic interests
Dark matter theory and phenomenology.
Background
- 2008-2012, Phd, SISSA Trieste, Italy
- 2012-2015, postdoc, TU Munich, Germany
- 09.2015-11.2015, adiunkt, NCBJ Warsaw, Poland
- 12.2015- , postdoc, University of Oslo
Publications
Profile on inSPIRE
Publications
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Bringmann, Torsten; Galea, Ahmad; Hryczuk, Andrzej Jan & Weniger, Christoph
(2017).
Novel Spectral Features in MeV Gamma Rays from Dark Matter.
Physical Review D.
ISSN 2470-0010.
95(4).
doi:
10.1103/PhysRevD.95.043002.
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Binder, Tobias; Bringmann, Torsten; Gustafsson, Michael & Hryczuk, Andrzej Jan
(2017).
Early kinetic decoupling of dark matter: when the standard way of calculating the thermal relic density fails.
Physical Review D.
ISSN 2470-0010.
96(11),
p. 1–15.
doi:
10.1103/PhysRevD.96.115010.
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Beneke, Martin; Dighera, Francesco & Hryczuk, Andrzej Jan
(2016).
Finite-temperature modification of heavy particle decay and dark matter annihilation.
Journal of High Energy Physics (JHEP).
ISSN 1126-6708.
2016(9).
doi:
10.1007/JHEP09(2016)031.
Show summary
We apply the operator product expansion (OPE) technique to the decay and annihilation of heavy particles in a thermal medium with temperature below the heavy particle mass, m_χ. This allows us to explain two interesting observations made before: a) that the leading thermal correction to the decay width of a charged particle is the same multiplicative factor of the zero-temperature width for a two-body decay and muon decay, and b) that the leading thermal correction to fermionic dark matter annihilation arises only at order T^4/m_χ^4. The OPE further considerably simplifies the computation and factorizes it into model-independent matrix elements in the thermal background, and short-distance coefficients to be computed in zero-temperature field theory.
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Beneke, M; Bharucha, A.; Dighera, F; Hellmann, C; Hryczuk, Andrzej Jan & Recksiegel, S
[Show all 7 contributors for this article]
(2016).
Relic density of wino-like dark matter in the MSSM.
Journal of High Energy Physics (JHEP).
ISSN 1126-6708.
2016(3).
doi:
10.1007/JHEP03(2016)119.
Show summary
The relic density of TeV-scale wino-like neutralino dark matter in the MSSM is subject to potentially large corrections as a result of the Sommerfeld effect. A recently developed framework enables us to calculate the Sommerfeld-enhanced relic density in general MSSM scenarios, properly treating mixed states and multiple co-annihilating channels as well as including off-diagonal contributions. Using this framework, including on-shell one-loop mass splittings and running couplings and taking into account the latest experimental constraints, we perform a thorough study of the regions of parameter space surrounding the well known pure-wino scenario: namely the effect of sfermion masses being non-decoupled and of allowing non-negligible Higgsino or bino components in the lightest neutralino. We further perform an investigation into the effect of thermal corrections and show that these can safely be neglected. The results reveal a number of phenomenologically interesting but so far unexplored regions where the Sommerfeld effect is sizeable. We find, in particular, that the relic density can agree with experiment for dominantly wino neutralino dark matter with masses ranging from 1.7 to beyond 4 TeV. In light of these results the bounds from Indirect Detection on wino-like dark matter should be revisited.
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Published
Feb. 8, 2016 2:20 PM
- Last modified
Feb. 20, 2016 5:09 PM