12-15 April 2016
BNL Physics Building
US/Eastern timezone

Jet Mass: a new parameter to study modification of hard jets

13 Apr 2016, 09:00
Large Seminar Room (BNL Physics Building)

Large Seminar Room

BNL Physics Building


Prof. Abhijit Majumder (Wayne State University)


We propose an extension to classify jet modification in heavy-ion collisions by including the jet mass along with its energy. The mass of a jet, as measured by jet reconstruction algorithms, is constrained by the jet's virtuality, which in turn has a considerable effect on such observables as the fragmentation function and jet shape observables. The leading parton, propagating through a dense medium, experiences substantial virtuality (or mass) depletion along with energy loss. Meaningful comparisons between surviving jets and jets produced in p-p collisions require mass depletion to be taken into account. Using a vacuum event generator, we show the close relationship between the actual jet mass and that after applying a jet reconstruction algorithm. Using an in-medium event generator, we demonstrate the clear difference between the mass of a surviving parton exiting a dense medium and a parton with a similar energy formed in a hard scattering event. Effects of this difference on jet observables are discussed.

Primary author

Prof. Abhijit Majumder (Wayne State University)

Presentation Materials