ATLAS sees light-by-light scattering for the first time

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mfb
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ATLAS sees light-by-light scattering for the first time

Post by mfb » Sat Nov 19, 2016 2:59 pm

A process searched literally for centuries... found (4.4 sigma).

Lead-lead collisions allow to study the "collision" of their intense electromagnetic fields, and while pair production has been seen long ago, pure photon scattering (2 photons -> 2 photons) is even less frequent. ATLAS saw 13 events with an expected background of 2.7 and an expected signal of 7.3.

ATLAS note
CERN Courier article

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chelle
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Re: ATLAS sees light-by-light scattering for the first time

Post by chelle » Fri Nov 25, 2016 6:37 pm

"With the additional integrated luminosity expected in upcoming runs, further study of the γγ → γγ process will allow tests of extensions of the Standard Model, in which new particles can participate via the loop diagrams, providing an additional window into new physics at the LHC."
Or

…, in which virtual particles can mingle with atoms that surround the collision center and split 'em up.
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mfb
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Re: ATLAS sees light-by-light scattering for the first time

Post by mfb » Sat Nov 26, 2016 2:20 am

Virtual particles are a mathematical tool only. And there are no "atoms that surround the collision center".

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chelle
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Re: ATLAS sees light-by-light scattering for the first time

Post by chelle » Sat Nov 26, 2016 8:59 am

mfb wrote:Virtual particles are a mathematical tool only.
Virtual particles are real, but they aren't persé particles, they are more like vibrations, waves, see this article by professor Matt Strassler:
https://profmattstrassler.com/articles- ... -are-they/

Image

Also think of that new proposed theory by professor Eric Verlinde who says Gravity isn't really fundamental:

Image
mfb wrote:… there are no "atoms that surround the collision center"
Hè?! Collisions happen in a sea of particles wherein waves can travel … towards surrounding mater (atoms). Just like a Tsunami that can reach the shores and shakeup matter after an earthquake; which is an sich a significant collision between matter, just like at the LHC. These collision waves at the LHC can at a certain 'boiling point' start to destroy/disrupt constructions (Atoms) along their way, and ignite a chain-reaction.

Doesn't it all look too recognizable? :mrgreen:

Image

Image

Image
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mfb
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Re: ATLAS sees light-by-light scattering for the first time

Post by mfb » Sat Nov 26, 2016 5:40 pm

Could you please keep your misunderstood pop-science descriptions and personal crackpot ideas out of threads discussing actual science please?

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chelle
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Re: ATLAS sees light-by-light scattering for the first time

Post by chelle » Sat Nov 26, 2016 6:52 pm

Last edited by chelle on Sun Nov 27, 2016 8:25 am, edited 2 times in total.
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mfb
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Re: ATLAS sees light-by-light scattering for the first time

Post by mfb » Sat Nov 26, 2016 7:57 pm

Those are not "my own ideas", those are things particle physicists (including me, but every individual physicist only has a small role) discovered.

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