Free Meson Seminars

Why is chemical freezeout at the chiral crossover temperature?

by Mr. Sushant Kumar (VECC, Kolkata)

Thursday, April 29, 2021 from to (Asia/Kolkata)
at Zoom
Description Please contact rishi(at)theory(dot)tifr(dot)res(dot)in for the zoom meeting id and the password for this seminar.

Nuclear collisions at relativistic energies produce a hot and dense fireball of quarks and gluons. As the fireball expands, it cools and encounters a transition to hadronic matter. Lattice computations predict a smooth crossover at around 155 MeV at zero net baryon density. On the other hand, analysis of the yields i.e. the number and type of hadrons through statistical models suggest a temperature of about 155 MeV of the last scattering surface at zero net baryon density. Surprisingly, these two entirely different scenarios, first which discusses the equilibrium properties of the system and the  second which is related to the dynamics within the system, are equal in values of respective temperatures. In this talk, I will discuss a computation which justifies such a coincidence.
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