Precision Photon Spectra for Wino Annihilation

Autor: Ian Moult, Varun Vaidya, Nicholas L. Rodd, Timothy Cohen, Matthew Baumgart, Emmanuel Moulin, Iain W. Stewart, Lucia Rinchiuso, Tracy R. Slatyer
Přispěvatelé: Département de Physique des Particules (ex SPP) (DPP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département de Physique des Particules (ex SPP) (DPhP)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Nuclear and High Energy Physics
Particle physics
Photon
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
electroweak interaction: symmetry breaking
leading logarithm approximation: higher-order
FOS: Physical sciences
photon: spectrum
Photon energy
01 natural sciences
High Energy Physics - Phenomenology (hep-ph)
effective field theory
factorization
0103 physical sciences
Jets
Effective field theory
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
Symmetry breaking
Resummation
010306 general physics
Phenomenological Models
Physics
Coupling constant
High Energy Astrophysical Phenomena (astro-ph.HE)
Annihilation
electroweak interaction: coupling constant
010308 nuclear & particles physics
Electroweak interaction
higher-order: 1
dark matter: annihilation
photon: energy
High Energy Physics - Phenomenology
annihilation
SU(2)
resummation
Wino: annihilation
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
lcsh:QC770-798
Astrophysics - High Energy Astrophysical Phenomena
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: JHEP
JHEP, 2019, 01, pp.036. ⟨10.1007/JHEP01(2019)036⟩
Journal of High Energy Physics
Journal of High Energy Physics, 2019, 01, pp.036. ⟨10.1007/JHEP01(2019)036⟩
Journal of High Energy Physics, Springer, 2019, 01, pp.036. ⟨10.1007/JHEP01(2019)036⟩
Journal of High Energy Physics, Vol 2019, Iss 1, Pp 1-54 (2019)
ISSN: 1126-6708
1029-8479
DOI: 10.1007/JHEP01(2019)036⟩
Popis: We provide precise predictions for the hard photon spectrum resulting from neutral SU$(2)_W$ triplet (wino) dark matter annihilation. Our calculation is performed utilizing an effective field theory expansion around the endpoint region where the photon energy is near the wino mass. This has direct relevance to line searches at indirect detection experiments. We compute the spectrum at next-to-leading logarithmic (NLL) accuracy within the framework established by a factorization formula derived previously by our collaboration. This allows simultaneous resummation of large Sudakov logarithms (arising from a restricted final state) and Sommerfeld effects. Resummation at NLL accuracy shows good convergence of the perturbative series due to the smallness of the electroweak coupling constant - scale variation yields uncertainties on our NLL prediction at the level of $5\%$. We highlight a number of interesting field theory effects that appear at NLL associated with the presence of electroweak symmetry breaking, which should have more general applicability. We also study the importance of using the full spectrum as compared with a single endpoint bin approximation when computing experimental limits. Our calculation provides a state of the art prediction for the hard photon spectrum that can be easily generalized to other DM candidates, allowing for the robust interpretation of data collected by current and future indirect detection experiments.
Comment: 56 pages, 12 figures; v2, updated to JHEP version
Databáze: OpenAIRE
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