‘Fire streaks’ ever more real in the collisions of atomic nuclei and protons

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“The proton-proton collisions in the CERN accelerators produce few strange particles. It is thus generally accepted that the quark-gluon plasma does not arise during these collisions. We took this fact into account in our model of fire streaks, and then we confronted its predictions with data from the NA49 experiment at the SPS accelerator. The compliance was strikingly good. So we can say that we have now ‘seen’ a fire streak in qualitatively different physical conditions, where we did not expect it at all!” explains Dr. Andrzej Rybicki (IFJ PAN), one of the authors of the publication in Physical Review C.

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Many things are taking place:

Fire Streaks in the Collisions of Protons and Atomic Nuclei (image)

Until now, “fire streaks” were used to describe the ultrarelativistic collisions of lead nuclei. Researchers from the Institute of Nuclear Physics of the Polish Academy of Sciences in Cracow have now also found them in much simpler collisions taking place between individual protons. (Source: IFJ PAN, Dual Color)

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Publisher: EurekAlert!
Date: 2019-05-09 10:52:47 GMT/UTC
Twitter: @EurekAlert
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Whirling ‘Collapsar’ Stars Gave Universe Its Gold

Most of the universe’s gold, uranium and other heavy elements are generated from rapidly whirling collapsing stars, a new study finds.

The universe’s three lightest elements ‘ hydrogen, helium and lithium ‘ were born in the earliest moments of the cosmos, just a minute or so after the Big Bang. Elements up to iron on the periodic table were mostly forged later, in the cores of stars.’

However, the way in which elements heavier than iron on the periodic table, such as gold and uranium, were created has been a long-standing mystery. Previous research suggested a key clue: atomic nuclei often needed to absorb neutrons rapidly, a phenomenon known as the “r-process” for short.

Date: 2019-05-08T19:04:56+00:00
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Ask Ethan: Where Does A Proton’s Mass Come From?

The three valence quarks of a proton contribute to its spin, but so do the gluons, sea quarks and antiquarks, and orbital angular momentum as well. The electrostatic repulsion and the attractive strong nuclear force, in tandem, are what give the proton its size, and the properties of quark mixing are required to explain the suite of free and composite particles in our Universe.

The whole is equal to the sum of its constituent parts. That’s how everything works, from galaxies to planets to cities to molecules to atoms. If you take all the components of any system and look at them individually, you can clearly see how they all fit together to add up to the entire system, with nothing missing and nothing left over. The total amount you have is equal to the amounts of all the different parts of it added together.

Publisher: Forbes
Date: 2019-04-27
Author: Ethan Siegel
Twitter: @forbes
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Greetings Earthlings: There was a bright light and zap. The data presented above may one day be zapped to another dimension. Just thought you should be aware. It should be alright to step abroad. It is safe.