# Quark Matter 2017

5-11 February 2017
Hyatt Regency Chicago
America/Chicago timezone

## Hard Substructure of Jets Probed in p-Pb collisions

Not scheduled
2h 30m
Hyatt Regency Chicago

#### Hyatt Regency Chicago

151 East Wacker Drive Chicago, Illinois, USA, 60601
Board: Lapidus
Poster

### Speaker

Kirill Lapidus (Yale University (US))

### Description

Collisions of ultrarelativistic heavy ions provide an opportunity to investigate strongly interacting matter under extreme energy densities and temperatures. Interaction of hard scattered partons with the hot and dense medium leads to a suppression of the observed jet yields, known as jet quenching. Along with other experimental approaches, studies of the jet substructure have the prospects of providing valuable information about jet quenching mechanisms. One of the jet substructure observables is the transverse momentum distribution of hard subjets probed with the Soft Drop algorithm. This algorithm removes soft large-angle components of a jet and identifies a pair of subjets that forms a hard splitting. The momentum balance of the pair is characterized by the $z_g$ observable defined as the fraction of the groomed jet's transverse momentum carried by the softer subjet. In pp collisions the distribution of $z_g$ is linked to the vacuum QCD splitting functions. It is interesting, therefore, to search for a possible modification of the $z_g$ distribution in proton-nucleus collisions due to the presence of cold nuclear matter. We present the status of the jet substructure analysis with Soft Drop using the data collected by the ALICE experiment in p-Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.

Preferred Track Jets and High pT Hadrons ALICE

### Primary author

Kirill Lapidus (Yale University (US))