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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

THE PROBLEM. “There are various mechanisms that may account for the antiquark flavour asymmetry of the proton.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn

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

QUARK-ANTIQUARK COLLISIONS. “One can isolate the antiquark distributions from the Drell–Yan cross-section by making use of this property.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn

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

PARTICLE MENAGERIE. “The Drell–Yan process in hadron–hadron collisions is a reaction in which a quark and an antiquark annihilate into a virtual photon, and that virtual photon decays into a lepton–antilepton pair.” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn

NEW CARTOON. “In the early 1990s the New Muon Collaboration (NMC) reported measurements of the deep inelastic structure functions (F2) of hydrogen (H) and deuterium (D).” https://www.nature.com/articles/s41586-021-03282-z View in LinkedIn

FRAGMENT FROM NATURE for this weekend only features an extraordinary article, whose title is ‘A Heuristic View on the Composition of Space’ by Guoxu Feng, at the Jun Huang School of Aeronautic Science and Engineering, Beihang University, Beijing, China. This speculation on the composition of space is startlingly original and tackles an old chestnut called the ether. https://lnkd.in/dATr5iE7 View in LinkedIn

Joan Miro, (The Ladder of Evasion, 1940), the extraordinary Catalan surrealist painter, immersed himself in the sense of wonder in his reconfigured world. https://lnkd.in/dpsa37ut View in LinkedIn

THE BEST GIFT. “If I had influence with the good fairy who is supposed to preside over the christening of all children, I should ask that her gift to each child in the world be a sense of wonder so indestructible that it would last throughout life, as an unfailing antidote against the boredom and disenchantments of later years, the sterile preoccupation with things that are artificial, the alienation from the sources of our strength.” (Rachel Carson, author of Silent Spring). Happy Christmas! https://lnkd.in/dzXZY5Yt View in LinkedIn