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
30m
Large Seminar Room (BNL Physics Building)

Large Seminar Room

BNL Physics Building

Speaker

Prof. Abhijit Majumder (Wayne State University)

Description

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