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<math display="inline"><msub><mi>N</mi><mrow><mi>eff</mi></mrow></msub></math> in the Standard Model at NLO is 3.043 / Cielo, Mattia (INFN, Naples ; Naples U.) ; Escudero, Miguel (CERN) ; Mangano, Gianpiero (INFN, Naples ; Naples U.) ; Pisanti, Ofelia (INFN, Naples ; Naples U.)
The effective number of relativistic neutrino species is a fundamental probe of the early Universe and its measurement represents a key constraint on many scenarios beyond the Standard Model of Particle Physics. In light of this, an accurate prediction of $N_{\rm eff}$ in the Standard Model is of pivotal importance. [...]
arXiv:2306.05460; CERN-TH-2023-103.- 2023-12-13 - 6 p. - Published in : Phys. Rev. D 108 (2023) L121301 Fulltext: 2306.05460 - PDF; Publication - PDF;

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