Nonlocal effects from boosted dark matter in indirect detection
نویسندگان
چکیده
Indirect dark matter (DM) detection typically involves the observation of standard model (SM) particles emerging from DM annihilation/decay inside regions high concentration. We consider an annihilation scenario in which this reaction has to be initiated by one DMs involved being boosted while other is ambient non-relativistic particle. This "trigger" must created, for example, a previous or decay heavier component DM. Remarkably, annihilating into gamma-rays at specific point galaxy could actually have traveled its source another same even galaxy. Such "non-local" behavior leads non-trivial dependence resulting photon signal on galactic halo parameters, such as density and core size, encoded so-called "astrophysical" $J$-factor. These non-local $J$-factors are strikingly different than usual scenario. A distinctive aspect that dwarf galaxies relative Milky Way tends suppressed typical value various degrees depending their characteristics. feature can thus potentially alleviate mild tension between explanation observed excess $\sim$ GeV photons Way's center vs. apparent non-observation corresponding galaxies.
منابع مشابه
Neutrino Oscillation Effects in Indirect Detection of Dark Matter
If neutrino oscillation plays a role in explaining the atmospheric neutrino deficit, then the same phenomenon would necessarily affect also the dark matter indirect-detection signal which consists in a muon-neutrino flux produced by neutralino annihilation in the Earth core. In this paper we investigate to which extent the upgoingmuon signal originated by neutralinos captured inside the Earth w...
متن کاملIndirect Detection of Little Higgs Dark Matter
Little Higgs models with T parity contain an attractive dark matter candidate, the heavy photon. We compute the cross section of the heavy photon annihilation into Zphoton pairs, which turns out to be substantially higher than the previously computed cross section for the two photon final state. Unfortunately, even with this enhancement, the monochromatic photon flux from galactic heavy photon ...
متن کاملThe Indirect Detection of Halo Dark Matter
High energy particles are produced by the annihilation of dark matter particles in our galaxy. These are presently searched for using balloon-borne an-tiproton and positron detectors and large area, deep underground neutrino telescopes. Dark matter particles, trapped inside the sun, are an abundant source of such neutrinos. From both the cosmological and particle physics points of view the ligh...
متن کاملIndirect detection of unstable heavy dark matter
Unstable relics with lifetime longer than the age of the Universe could be the dark matter today. Electrons, photons and neutrinos are a natural outcome of their decay and could be searched for in cosmic rays and in γ-ray and neutrino detectors. I compare the sensitivities of these three types of searches to the mass and lifetime of a generic unstable particle. I show that if the relics constit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.103.083006