Wobbly Dark Matter Signals at Cherenkov Telescopes from Long Lived Mediator Decays
arXiv:1812.08694 · doi:10.1103/PhysRevLett.122.191103
Abstract
Imaging Atmospheric Cherenkov Telescope (IACT) searches for dark matter often perform observations in "wobble mode", i.e. collecting data from the signal region and from a corresponding background control region at the same time, enabling efficient simultaneous determination and subtraction of background. This observation strategy is possibly compromised in scenarios where dark matter annihilates to long-lived mediators that can traverse astrophysical distances before decaying to produce the gamma rays observed by the IACTs. In this paper, we show that this challenge comes with several interesting features and opportunities: in addition to signal contamination in the background control region, the gamma-ray spectrum changes with the observing direction angle and typically exhibits a hard excess at high energies. This affects signal reconstruction via subtraction of the background control region measurements in non-trivial ways. Such features represent a significant departure from the canonical picture, and offer novel handles to identify a dark matter signal and to extract underlying dark matter parameters.
arXiv comment6 pages, 5 figures
References in corpus (29)
- Secluded WIMP Dark Matter
- Dark Matter Self-interactions and Small Scale Structure
- Analytical Models For Galactic Nuclei
- A Method for Measuring (Slopes of) the Mass Profiles of Dwarf Spheroidal Galaxies
- High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
- General Constraints on Dark Matter Decay from the Cosmic Microwave Background
- FIRE in the Field: Simulating the Threshold of Galaxy Formation
- Cosmological constraints on exotic injection of electromagnetic energy
- Dwarf galaxy annihilation and decay emission profiles for dark matter experiments
- GeV-Scale Thermal WIMPs: Not Even Slightly Dead
- Dark matter annihilation and decay in dwarf spheroidal galaxies: The classical and ultrafaint dSphs
- Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter
- Looking for the WIMP Next Door
- Spherical Jeans analysis for dark matter indirect detection in dwarf spheroidal galaxies - Impact of physical parameters and triaxiality
- Thermal Dark Matter Through the Dirac Neutrino Portal
- Non-universal BBN bounds on electromagnetically decaying particles
- Phenomenology of Dark Matter annihilation into a long-lived intermediate state
- Searching for Secluded Dark Matter with H.E.S.S., Fermi-LAT, and Planck
- PeV Neutrinos and a 3.5 keV X-Ray Line from a PeV Scale Supersymmetric Neutrino Sector
- Neutrino Masses and Sterile Neutrino Dark Matter from the PeV Scale
- Indirect dark matter searches in the dwarf satellite galaxy Ursa Major II with the MAGIC Telescopes
- SUSY Implications from WIMP Annihilation into Scalars at the Galactic Centre
- Off-Diagonal Dark-Matter Phenomenology: Exploring Enhanced Complementarity Relations in Non-Minimal Dark Sectors
- Dark Matter "Transporting" Mechanism Explaining Positron Excesses
- Exotic Sterile Neutrinos and Pseudo-Goldstone Phenomenology
- Sub-GeV Dark Matter Shining at Future MeV Gamma-Ray Telescopes
- Dark matter indirect signals with long-lived mediators
- Cosmological Constraints on Unstable Particles: Numerical Bounds and Analytic Approximations
- Pointing optimization for IACTs on indirect dark matter searches
Cited by in corpus (7)
- Loop Dominated Signals from Neutrino Portal Dark Matter
- Simple Hidden Sector Dark Matter
- "Non-Local" Effects from Boosted Dark Matter in Indirect Detection
- Bouncing Dark Matter
- Vector Self-Interacting Dark Matter
- Searching for dark matter annihilating into light long-lived mediators from stars inside dwarf spheroidal galaxies
- Indirect detection of long-lived particles in a rich dark sector with a dark vector portal