linkedin post 2021-12-20 04:55:29
THE OTHER PARTS. “The asymmetry of antimatter in the proton.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn
linkedin post 2021-12-20 04:56:31
THE SIMPLEST ATOM. “The fundamental building blocks of the proton—quarks and gluons—have been known for decades. However, we still have an incomplete theoretical and experimental understanding of how these particles and their dynamics give rise to the quantum bound state of the proton and its physical properties, such as its spin.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn
linkedin post 2021-12-20 04:58:03
EXAPTATION. “The tinkering principle, proposed more than three decades ago by Jacob (1977) who stated that “evolution tinkers together contraptions and novelties come from previously unseen associations of already available material”. https://lnkd.in/dJ8dUGRd View in LinkedIn
linkedin post 2021-12-20 05:01:47
GUILLERMO LORCA. Large scale. Moca museum, Barcelona. View in LinkedIn
linkedin post 2021-12-21 05:54:58
98% OF THE QUARK IS ENERGY. “The two up quarks and the single down quark that comprise the proton in the simplest picture account only for a few per cent of the proton mass, the bulk of which is in the form of quark kinetic and potential energy and gluon energy from the strong force.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn
linkedin post 2021-12-21 05:57:34
READ CAREFULLY. “An essential feature of this force, as described by quantum chromodynamics, is its ability to create matter–antimatter quark pairs inside the proton that exist only for a very short time.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn
linkedin post 2021-12-21 05:58:21
ANTIMATTER QUARKS. “Their fleeting existence makes the antimatter quarks within protons difficult to study, but their existence is discernible in reactions in which a matter–antimatter quark pair annihilates.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn
linkedin post 2021-12-21 05:59:15
HUNTING THE SNARK. “In this picture of quark–antiquark creation by the strong force, the probability distributions as a function of momentum for the presence of up and down antimatter quarks should be nearly identical, given that their masses are very similar and small compared to the mass of the proton.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn
linkedin post 2021-12-21 06:01:10
SURPRISE. “Here we provide evidence from muon pair production measurements that these distributions are considerably different, with more abundant down antimatter quarks than up antimatter quarks over a wide range of momenta.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn
linkedin post 2021-12-21 06:01:56
A DOOR OPENS. “These results are expected to revive interest in several proposed mechanisms for the origin of this antimatter asymmetry in the proton that had been disfavoured by previous results, and point to future measurements that can distinguish between these mechanisms.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn