scholarly journals Dark Radiation or Warm Dark Matter from long lived particle decays in the light of Planck

2013 ◽  
Vol 724 (1-3) ◽  
pp. 77-83 ◽  
Author(s):  
Pasquale Di Bari ◽  
Stephen F. King ◽  
Alexander Merle
Keyword(s):  
Dark Matter ◽  
Dark Radiation ◽  
Particle Decays

scholarly journals Hunting wino and higgsino dark matter at the muon collider with disappearing tracks

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Rodolfo Capdevilla ◽  
Federico Meloni ◽  
Rosa Simoniello ◽  
Jose Zurita
Keyword(s):  
Dark Matter ◽  
Simple Strategy ◽  
Physics Program ◽  
Daunting Task ◽  
Muon Collider ◽  
New States ◽  
Muon Colliders ◽  
Particle Decays ◽  
Electrically Charged

Abstract We study the capabilities of a muon collider experiment to detect disappearing tracks originating when a heavy and electrically charged long-lived particle decays via X+→ Y+Z0, where X+ and Z0 are two almost mass degenerate new states and Y+ is a charged Standard Model particle. The backgrounds induced by the in-flight decays of the muon beams (BIB) can create detector hit combinations that mimic long-lived particle signatures, making the search a daunting task. We design a simple strategy to tame the BIB, based on a detector-hit-level selection exploiting timing information and hit-to-hit correlations, followed by simple requirements on the quality of reconstructed tracks. Our strategy allows us to reduce the number of tracks from BIB to an average of 0.08 per event, hence being able to design a cut-and-count analysis that shows that it is possible to cover weak doublets and triplets with masses close to $$ \sqrt{s}/2 $$ s / 2 in the 0.1–10 ns range. In particular, this implies that a 10 TeV muon collider is able to probe thermal MSSM higgsinos and thermal MSSM winos, thus rivaling the FCC-hh in that respect, and further enlarging the physics program of the muon collider into the territory of WIMP dark matter and long-lived signatures. We also provide parton-to-reconstructed level efficiency maps, allowing an estimation of the coverage of disappearing tracks at muon colliders for arbitrary models.

scholarly journals Dark matter and dark radiation

2009 ◽  
Vol 79 (2) ◽  
Author(s):  
Lotty Ackerman ◽  
Matthew R. Buckley ◽  
Sean M. Carroll ◽  
Marc Kamionkowski
Keyword(s):  
Dark Matter ◽  
Dark Radiation

SEARCHING FOR AXIONS AND OTHER EXOTICS WITH DARK MATTER DETECTORS

2010 ◽  
Vol 25 (02n03) ◽  
pp. 564-572
Author(s):  
MAXIM POSPELOV
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Cold Dark Matter ◽  
Direct Detection ◽  
Annual Modulation ◽  
The Standard Model ◽  
Detection Capabilities ◽  
The Impact ◽  
Particle Decays ◽  
O 10

I consider models of light super-weakly interacting cold dark matter, with [Formula: see text] mass, focusing on bosonic candidates such as pseudoscalars and vectors. I analyze the cosmological abundance, the γ-background created by particle decays, the impact on stellar processes due to cooling, and the direct detection capabilities in order to identify classes of models that pass all the constraints. In certain models, variants of photoelectric (or axioelectric) absorption of dark matter in direct-detection experiments can provide a sensitivity to the superweak couplings to the Standard Model which is superior to all existing indirect constraints. In all models studied, the annual modulation of the direct-detection signal is at the currently unobservable level of O(10-5).

scholarly journals Asymmetric Dark Matter and Dark Radiation

2012 ◽  
Vol 2012 (07) ◽  
pp. 022-022 ◽  
Author(s):  
Mattias Blennow ◽  
Enrique Fernandez Martinez ◽  
Olga Mena ◽  
Javier Redondo ◽  
end Paolo Serra
Keyword(s):  
Dark Matter ◽  
Dark Radiation ◽  
Asymmetric Dark Matter

scholarly journals Dark radiation constraints on mixed Axion/Neutralino dark matter

2013 ◽  
Vol 2013 (04) ◽  
pp. 041-041 ◽  
Author(s):  
Kyu Jung Bae ◽  
Howard Baer ◽  
Andre Lessa
Keyword(s):  
Dark Matter ◽  
Dark Radiation

scholarly journals Residual non-Abelian dark matter and dark radiation

2017 ◽  
Vol 768 ◽  
pp. 12-17 ◽  
Author(s):  
P. Ko ◽  
Yong Tang
Keyword(s):  
Dark Matter ◽  
Dark Radiation

Dark matter and dark radiation in brane world cosmology and its observational test in the BBN, CMB and supernovae

2005 ◽  
Vol 138 ◽  
pp. 82-85
Author(s):  
T. Kajino ◽  
F.K. Ichiki ◽  
P.M. Garnavich ◽  
G.J. Mathews ◽  
M. Yahiro
Keyword(s):  
Dark Matter ◽  
Brane World ◽  
Dark Radiation ◽  
Observational Test
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