Speaker
Yang-Ting Chien
(Los Alamos National Laboratory)
Description
Theoretical investigations and experimental measurements of jet substructure modifications in heavy ion collisions allow us to disentangle cold nuclear matter effects and jet-medium interactions in the quark-gluon plasma, providing a direct probe of the QGP properties. Precision calculations of jet substructure observables will thus become the key to extracting the medium properties. Jet shapes and jet fragmentation functions give the transverse and longitudinal energy profiles inside jets and are sensitive to the jet formation mechanism in the medium. In this talk we will demonstrate the resummation of jet shapes at next-to-leading logarithmic accuracy using Soft-Collinear Effective Theory. This is the first time phase space logarithms in this observable are resummed using renormalization group techniques. We will then present the calculation of jet shape modification in heavy ion collisions caused by Glauber gluon interactions in the background QGP medium. The study of jet shape modification is closely related to the calculation of jet energy loss. Taken together, these observables provide a comprehensive description of the energy distribution of the in-medium parton shower. We will show first results for the modifications of jets beyond the soft gluon emission limit for 2.76 TeV Pb+Pb collisions at the LHC and present predictions for the 5.1 TeV Pb+Pb run.
[1] Y.-T. Chien, I. Vitev, JHEP 1412 (2014) 061
[2] Y.-T. Chien, I. Vitev, JHEP in preparation
| On behalf of collaboration: | NONE |
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Author
Yang-Ting Chien
(Los Alamos National Laboratory)
Co-author
Dr
Ivan Vitev
(Los Alamos National Laboratory)
