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
ATLAS sees light-by-light scattering for the first time
Re: ATLAS sees light-by-light scattering for the first time
Or"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."
…, in which virtual particles can mingle with atoms that surround the collision center and split 'em up.
Dance, even if you have nowhere to do it but your own living room.
Wear Sunscreen by Baz Luhrmann - Mary Schmich
Wear Sunscreen by Baz Luhrmann - Mary Schmich
Re: ATLAS sees light-by-light scattering for the first time
Virtual particles are a mathematical tool only. And there are no "atoms that surround the collision center".
Re: ATLAS sees light-by-light scattering for the first time
Virtual particles are real, but they aren't persé particles, they are more like vibrations, waves, see this article by professor Matt Strassler:mfb wrote:Virtual particles are a mathematical tool only.
https://profmattstrassler.com/articles- ... -are-they/
Also think of that new proposed theory by professor Eric Verlinde who says Gravity isn't really fundamental:
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.mfb wrote:… there are no "atoms that surround the collision center"
Doesn't it all look too recognizable?
Dance, even if you have nowhere to do it but your own living room.
Wear Sunscreen by Baz Luhrmann - Mary Schmich
Wear Sunscreen by Baz Luhrmann - Mary Schmich
Re: ATLAS sees light-by-light scattering for the first time
Could you please keep your misunderstood pop-science descriptions and personal crackpot ideas out of threads discussing actual science please?
Re: ATLAS sees light-by-light scattering for the first time
Actual science: https://youtu.be/gOyusJVKxvc
Last edited by chelle on Sun Nov 27, 2016 8:25 am, edited 2 times in total.
Dance, even if you have nowhere to do it but your own living room.
Wear Sunscreen by Baz Luhrmann - Mary Schmich
Wear Sunscreen by Baz Luhrmann - Mary Schmich
Re: ATLAS sees light-by-light scattering for the first time
Those are not "my own ideas", those are things particle physicists (including me, but every individual physicist only has a small role) discovered.