SBU HEP Seminar - Somadutta Bhatta (SBU)

Monday 28 Oct 2024, 12:45 → 13:45 America/New_York

Graduate Building D-122 (Stony Brook University)

12:45 → 13:35 Leveraging Ultra-Central Collisions to Constrain Shape of the Nucleus and Initial State.

The shape of nuclei are rarely spherical. The parameters describing nuclear geometry are generally extracted from spectroscopic methods, reflecting an average shape over timescales of about 10^{3} fm/c. However, colliding them at relativistic energies offers a snapshot of the nuclear geometry on an event-by-event basis, thanks to the extremely short crossing time of the order of 0.1 fm/c. The size and shape of the overlap area formed in heavy-ion collisions influences the final state radial and azimuthal distribution of particles, typically used to extract properties of the Quark Gluon Plasma. In this talk, I will present recent ATLAS measurements of multi-particle correlations in ultra-central heavy-ion collisions as an effective tool to constrain nuclear geometry and different sources of initial state fluctuations. This talk will highlight the unique potential of ultra-central collisions in constraining both the initial state and the QGP properties.

Speaker: Somadutta Bhatta (Stony Brook University (US))

SBUHEP_SomaduttaVFin.pdf