Parameter

Theory

Experiment

Ref.

Hubble’s Parameter, km⁄s Mpc

68.7457

69.32 ± 0.8

${69.1}_{-0.6}^{+0.4}$

69.8 ± 1.9

[38]

[39]

[40]

CMB Temperature, K

2.72518

2.72548 ± 0.00057

[41]

Concentration of Intergalactic Plasma, m⁻³

0.25480

≲0.27

[42]

Proton Relative Energy Density

0.048014655

0.049 ± 0.013

[8]

Minimum Energy of Photons, ×10⁻¹⁴ eV

1.8743

≲2.2

[43]

Far-Infrared Background Peak, K

28.955

29

[44]