Physicists find surprising ‘liquid-like’ particle interactions in Large Hadron Collider

Jul 27, 2015

by Don Lincoln

Three years ago, Rice physicists and their colleagues on the Large Hadron Collider’s (LHC’s) Compact Muon Solenoid (CMS) experiment stumbled on an unexpected phenomenon. Physicists smashed protons into lead nuclei at nearly the speed of light, which caused hundreds of particles to erupt from these collisions. But that wasn’t the surprise. What was surprising is where these particles went: Rather than spreading out evenly in all directions, the particles coming out of the collisions preferentially lined up in a specific direction.

Now, the Rice team has co-authored a paper that describes the unexpected particle interactions from these proton and collisions.

Particle detectors are shaped a little like a soup can. In these kinds of collisions, there is a tendency for particles to amass in a line along the axis of the can known as a “ridge.” Up until now, physicists understood a lot about what happens when a pair of protons or a pair of lead nuclei collide, but not a lot about what happens when a proton hits a lead nucleus: Would the hot nuclear matter coming out of the collision act like protons colliding, in which the post-collision particles coast along without feeling the effect of their neighbors? Or would the particles coming out of proton and lead collisions act in a more collective, liquid-like way as in lead-nuclei collisions?


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2 comments on “Physicists find surprising ‘liquid-like’ particle interactions in Large Hadron Collider

  • Of all of the discoveries we have made in science, I find it absolutely a stupid idea by religious Zealots that their God had to have a rib from Adam to make Eve. I mean he was able to make the rest of the Universe in one day and all of its components and did it by simply saying for it to be so! BUT ….. He needed a RIB?….. And to add to that, Eve would have been his cloned SISTER by DNA! How screwed up is that?



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