Reconstructed Jet Measurements in p+p, p+Au and Cu+Au collision using PHENIX

Jun 2, 2020, 11:40 AM

Oral Presentation Jets and High Momentum Hadrons Parallel


Milap Patel


In addition to the previously reported inclusive jet spectra and nuclear
modification factors in $d$+Au, and Cu+Au collisions at $\sqrt{s_{NN}}$ =
200 GeV at mid-rapidity, measurements of jets in p+A and jet substructure in
p+p and Cu+Au have also been performed in PHENIX. Jets are reconstructed
from charged particle tracks and electromagnetic calorimeter clusters with
the anti-kT algorithm. The measurements are unfolded for detector response.
While the nuclear modification factor for centrality integrated data in d+Au
collisions is found to be consistent with unity, the centrality-selected
modification factor shows substantial deviations from unity. New
measurements in p+Au collisions will provide crucial information for
understanding the anomalous relationship between hard and soft processes in
$p$/$d$+A systems. Meanwhile the Cu+Au collision system offers an
intermediate testing ground for heavy ion jet reconstruction between small
systems and those with the largest heavy ions. The underlying event in Cu+Au
events is smaller when compared to that in the largest heavy ion systems,
simplifying the extraction of the jet signals, but still achieving the large
energy densities needed to drive substantial in-medium energy loss. To
further explore the modification of the jets in Cu+Au collisions, jet
fragmentation functions and jet grooming studies accessing the jet
substructure have been performed. This talk will present the latest results
from the reconstruction jet studies in PHENIX and their implications for
energy loss in the quark gluon plasma.

Contribution type Contributed Talk
Collaboration (if applicable) PHENIX
Track Jets and High Momentum Hadrons

Primary author

Gabor David (Brookhaven National Laboratory)

Presentation materials