Bottomonia Suppression in Heavy-Ion Collisions from AdS/CFT

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Heavy flavor and quarkonium Poster Session

Speaker

Nadia Barnard (University of Cape Town)

Description

We compute for the first time the suppression of bottomonia in a strongly coupled QGP and compare the results to those from a weakly coupled QGP and to data. Using imaginary time techniques we numerically determine the real and imaginary parts of the binding energy of $\Upsilon$(1S) in (complex) potentials derived from AdS/CFT and from pQCD. We confirm the strong coupling binding energies by independently deriving the meson spectrum in AdS/CFT using semiclassical, rotating open strings.

We then implement the complex binding energies in a suppression model to determine the $\Upsilon$(1S) nuclear modification factor in $\sqrt{s}_{NN}=2.76$ TeV Pb+Pb collisions. The simplest strong-coupling, $p_T$-independent potential leads to a significant oversuppression of $\Upsilon$(1S) compared to data while the results from the pQCD-derived potential are consistent with data. Lastly, we investigate the consequences of the different velocity dependencies of potential models on the bottomonia $R_{AA}(p_T)$.

Primary author

Nadia Barnard (University of Cape Town)

Co-author

William Alexander Horowitz (University of Cape Town (ZA))

Presentation Materials