$\alpha_s$(2019) discussions summary

d’Enterria, D.; Alekhin, S.; Barreiro, F.; Bethke, S.; Brambilla, Nora; Britzger, D.; Brodsky, Stanley J.; Camarda, S.; Brida, Mattia Dalla; Golterman, Maarten; Huston, J.; Kluth, S.; Kühn, Johann H.; Miravitllas, Ramon; Ramos, Redamy Pérez; Peris, Santiago; Petreczky, Péter; Pires, João; Poldaru, A.; Rabbertz, K.; Ringer, Felix; Sint, Stefan; Sommer, Rainer; Somogyi, G.; Takaura, Hiromasa; Verbytskyi, A.

doi:10.22323/1.365.0026

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“…The world average value for this parameter is α s (µ 0 ) = πa s (µ 0 ) = 0.1181 ± 0.0011 as reported in the Ref. [24]. By calculating the higher order QCD corrections, the perturbative coefficients of functions β i have been obtained at different loop levels [25][26][27][28].…”

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confidence: 75%

Non-Extensive Behaviour of the QCD Strong Coupling Constant

Javidan,

Yazdanpanah,

Nematollahi

2020

Preprint

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The compatibility of theoretically calculated values for α s (Q), through the renormalization group approach with experimental data is studied. There exists considerable divergence in-between theoretical and experimental results at low energies, which cannot be explained by thermal field theory and considering chemical potential. Such great deviation can be treated successfully by considering the q-generalized statistical effects through adding a q-nonextensive parameter in the fitting of theoretical results on the experimental data.

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confidence: 75%