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Flow from small Systems 

Speaker: Wei Li (Rice U.)

Time: Nov. 10(Tuesday) 9:00am (New York), 6:00am (San Fransisco), 3:00pm (Frankfurt) 7:30pm(New Delhi), 10:00pm (Beijing), 11:00pm (Tokyo)

Abstract: In high energy collisions of large, heavy nuclei (e.g., Au or Pb), a new state of matter consisting of liberated quarks and gluons is formed at a temperature of a few trillion Kelvins. This "Quark-Gluon Plasma" (QGP), discovered at the Relativistic Heavy Ion Collider (BNL) and the Large Hadron Collider (CERN, Switzerland), is found to exhibit amazing collective behavior as a nearly "perfect" fluid, which flows with close-to-zero viscous dissipation. It was thought that elementary collision systems like proton-proton (pp) or proton-nucleus (pA) are too small and dilute to form a QGP fluid so they were often treated as a reference in understanding the emergence of perfect fluidity in large heavy ion systems. Surprisingly, in recent years, evidence for collective effects and QGP formation has also been revealed in those smallest collisions, when looking at a fraction of rare events releasing largest number of particles. In this talk, I will review key experimental findings of collective phenomena in small-system collisions, and discuss our current understanding of its physical origins. I will also give some perspectives of future programs to address open issues in understanding phenomena of small-system collisions, as well as where else we may search for them.

Chair: Jiangyong Jia

ZOOM link: Please register here, the ZOOM link will be send in the comming Monday by group email. By attending this event you agree to the seminar and discussion being recorded and posted on the seminar web site.

Starts Nov 10, 2020 22:00
Ends Nov 10, 2020 23:30