Jet Measurements in Heavy-ion Collisions with CMS

Hot Quarks 2014: Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions

Elayavalli, Raghav Kunnawalkam^1

Rutgers University, Piscataway

08854, United States^1

关键词: Data-driven methods;    Energy distributions;    Heavy ion collision;    Jet quenching;    Nuclear modification factors;    Quark-gluon plasma;    Transverse momenta;    Transverse momentum jets;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/612/1/012008/pdf
DOI  :  10.1088/1742-6596/612/1/012008

来源: IOP

【 摘 要 】

The production of a strongly interacting medium in heavy-ion collisions is identified through suppression of high transverse momentum jets leading to an effect known as jet quenching. Detailed measurements of nuclear modification factors and energy flow of the aforementioned quenched jets are performed with the CMS detector. These new results extend previous measurements to large angles with respect to the quenched jets and increase reach in the transverse momentum range. High statistics pp, pPb and PbPb data taken in 2011-13 are used in the following analysis. A new data-driven method to estimate the underlying event contribution from the forward calorimeter energy distribution is employed which takes into account possible event by event flow modulation. The flavor dependence of energy loss of jets is studied by tagging heavy flavor b-jets in these systems.