A new pre-print uses novel methods to make a high precision determination of the strong force coupling constant, at greater precision than all previous determinations combined, which is:
αs(mZ) = 0.11873(56)
The relative uncertainty is one part per 212.
This is important because all strong force (i.e. QCD) calculations rely upon this experimentally determined physical constant.
The Particle Data Group value is 0.1180(9) which is a relative uncertainty of one part per 131 using an error weighted average of all strong force coupling constant measurements.
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Partitioning the genomic journey to becoming Homo sapiens
Luca Pagani, Riccardo Bertazzon, Vasili Pankratov, Leonardo Vallini, View ORCID ProfileDavide Marnetto, Maurizio Esposito, Ilaria Granata, En En Teo, Aswini Leela Loganathan, Pille Hallast, Charles Lee, Qasim Ayub, Massimo Mezzavilla
doi: https://doi.org/10.1101/2024.12.09.627480 Abstract
What makes us human? Homo sapiens diverged from its ancestors in fundamental ways, reflected in recent genomic acquisitions like the PAR2-Y chromosome translocation. Here we show that despite morphological and cultural differences between modern and archaic humans, these human groups share these recent acquisitions. Our modern lineage shows recent functional variants in only 56 genes, of which 24 are linked to brain functions and skull morphology. Nevertheless, these acquisitions failed to introgress into Neanderthals when archaic and modern populations admixed after 350 kya, suggesting their exclusive link to the modern human niche or that Neanderthal’s small population size hindered their spread. Taken together, our results point to a scenario where Modern and Archaic should be regarded as populations of an otherwise common human species, which independently accumulated mutations and cultural innovations.
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