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SUMMARY:Studying QCD modeling of uncertainties in particle spectra from da
 rk-matter annihilation into jets
DTSTART;VALUE=DATE-TIME:20210830T154500Z
DTEND;VALUE=DATE-TIME:20210830T160000Z
DTSTAMP;VALUE=DATE-TIME:20261011T053003Z
UID:indico-contribution-15833@indico.ific.uv.es
DESCRIPTION:Speakers: Adil Jueid (Konkuk University)\nMotivated by various
  excesses observed by Fermi-LAT and AMS\, we perform a detailed analysis o
 f QCD uncertainties on particle spectra from dark-matter annihilation (or 
 decay) into jets. When annihilated to SM particles\, the final-state produ
 cts undergo various complicated processes such as QED and QCD bremsstrahlu
 ng\, hadronization\, and hadron decays. These processes contain some intri
 nsic uncertainties which are usually difficult to model and which are negl
 ected in physical analyses. First\, we perform several re-tunings of the f
 ragmentation function parameters. Then\, we estimate two kinds of uncertai
 nties: *(i)* perturbative from QCD showers and *(ii)* non-perturbative fro
 m hadronization function. The results are tabulated for a wide range of da
 rk matter masses and annihilation channels. They can be found on Zenodo\; 
 https://doi.org/10.5281/zenodo.3764809\n\nhttps://indico.ific.uv.es/event/
 6178/contributions/15833/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15833/
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