Exames Nacionais 2021

Publicado em Agrupamento, Alunos, Diretor, Encarregados de Educação, exames, Professores Por Paulo TorresPublicado em 25 Março, 202125 Março, 2021

Visualizações de Artigo: 213

A crunching multiverse to solve two physics puzzles at once 13 Janeiro, 2022
A crunching multiverse to solve two physics puzzles at once The discovery of the Higgs boson was a landmark in the history of physics. It explained something fundamental: how elementary particles that have mass get their masses. But it also marked something no less fundamental: the beginning of an era of measuring in detail the […]
ATLAS gives new insight into the internal structure of the proton 12 Janeiro, 2022
ATLAS gives new insight into the internal structure of the proton While the Large Hadron Collider (LHC) is well known for smashing protons together, it is actually the quarks and gluons inside the protons – collectively known as partons – that are really interacting. Thus, in order to predict the rate of a process occurring […]
BASE breaks new ground in matter–antimatter comparisons 21 Dezembro, 2021
BASE breaks new ground in matter–antimatter comparisons In a paper published today in the journal Nature, the BASE collaboration at CERN reports the most precise comparison yet between protons and antiprotons, the antimatter counterparts of protons. Analysing proton and antiproton measurements taken over a year and a half at CERN’s antimatter factory, a unique facility […]
ISOLDE data get deluxe theoretical treatment 10 Dezembro, 2021
ISOLDE data get deluxe theoretical treatment The atomic nucleus is a tough nut to crack. The strong interaction between the protons and neutrons that make it up depends on many quantities, and these particles, collectively known as nucleons, are subject to not only two-body forces but also three-body ones. These and other features make the […]
CMS homes in on Higgs boson’s lifetime 2 Dezembro, 2021
CMS homes in on Higgs boson’s lifetime The Higgs boson doesn’t stick around for long. Once it is created in particle collisions, the famed particle lives for a mere less than a trillionth of a billionth of a second or, more precisely, 1.6 x 10-22 seconds. According to theory, that is, for so far experiments […]
Bismuth isotopes also alternate from spheres to rugby balls 17 Novembro, 2021
Bismuth isotopes also alternate from spheres to rugby balls Alternating from spheres to rugby balls is no longer the sole preserve of mercury isotopes, an international team at CERN’s ISOLDE facility reports in a paper published in Physical Review Letters. Isotopes are forms of a chemical element that have the same number of protons in […]
ALICE takes the next step in understanding the interaction between hadrons 17 Novembro, 2021
ALICE takes the next step in understanding the interaction between hadrons In an article recently published in Physical Review Letters, the ALICE collaboration has used a method known as femtoscopy to study the residual interaction between two-quark and three-quark particles. Through this measurement, an interaction between the ɸ (phi) meson (strange-antistrange quarks) and a proton (two […]
ALICE 3 workshop: towards a next-generation heavy-ion experiment for the 2030s 8 Novembro, 2021
ALICE 3 workshop: towards a next-generation heavy-ion experiment for the 2030s On 18 and 19 October, ALICE held a workshop on ALICE 3, the next-generation heavy-ion experiment for Run 5 of the LHC and beyond. This new heavy-ion programme will address some of the physics questions that are not accessible with Runs 3 and 4. […]
A triple treat from CMS 29 Outubro, 2021
A triple treat from CMS It’s a triple treat. By sifting through data from particle collisions at the Large Hadron Collider (LHC), the CMS collaboration has seen not one, not two but three J/ψ particles emerging from a single collision between two protons. In addition to being a first for particle physics, the observation opens […]
Grabbing magic tin by the tail 22 Julho, 2021
Grabbing magic tin by the tail Atomic nuclei have only two ingredients, protons and neutrons, but the relative number of these ingredients makes a radical difference in their properties. Certain configurations of protons and neutrons, with “magic numbers” of protons or neutrons arranged into filled shells within the nucleus, are more strongly bound than others. […]