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PPGFís | IF—UFRGS
An investigation of the dark photon as mediator between
dark matter and the standard model
Marcio de Sousa Mateus JuniorDARKWIN-IIP | 09/2019
The model
Marcio Mateus Jr. | IF - UFRGS4
DARKWIN – IIP
dark photon –> fermion DM
Marcio Mateus Jr. | IF - UFRGS6
DARKWIN – IIP
dark photon –> scalar DM
Marcio Mateus Jr. | IF - UFRGS7
DARKWIN – IIP
dark photon –> vector DM
Methods
Methods
Marcio Mateus Jr. | IF - UFRGS9
DARKWIN – IIP
Results
Results
Marcio Mateus Jr. | IF - UFRGS11
DARKWIN – IIP
Variation of the annihilation cross section in function of the masses of the mediator and the scalar DM
Results
Marcio Mateus Jr. | IF - UFRGS12
DARKWIN – IIP
Variation of the annihilation cross section in function of the masses of the mediator and the fermion DM
Results
Marcio Mateus Jr. | IF - UFRGS13
Variation of the annihilation cross section in function of the masses of the mediator and the vector DM
DARKWIN – IIP
Parameters
Marcio Mateus Jr. | IF - UFRGS14
Parameter Value
SM fermion mass 𝑚𝑒 = 511 𝑘𝑒𝑉
SM coupling (left) 𝑔𝑙 = 0.25
SM coupling (right) 𝑔𝑟 = 0
DM coupling (scalar and fermion DM) 𝑔𝑥 = 1
DM coupling (vector DM) 𝑔𝑥 = 10−7
Dimensionless Hubble parameter ℎ = 0.678
Present day CMB temperature 𝑇0 = 2.7255
𝜎𝑣 = 𝜎𝑣 + 𝜗(𝑣2) where 𝑣 = Τ𝑐 3
X ≡ Τ𝑚𝑥 𝑇𝑓.𝑜. 𝑋 = 30
DARKWIN – IIP
References
Marcio Mateus Jr. | IF - UFRGS15
[1] H. Dreiner et al, Physical Review D 87 075015 (2012). arXiv:1308.4409v1 [hep-ph]
[2] S. Profumo, TASI 2012 Lectures on Astrophysical Probes of DarkMatter (2013). arXiv:1301.0952v1 [hep-ph];
[3] Planck Collaboration, Planck 2018 results. VI. Cosmologicalparameters (2018). arXiv:1807.06209v1 [astro-ph.CO]
[4] CMS Collaboration, Physical Review D 97 092005 (2018). arXiv:1712.02345 [hep-ex]
DARKWIN – IIP