Speaker
Yue Shi Lai
(Massachusetts Inst. of Technology (US))
Description
We present the latest development of a particle-flow-based jet reconstruction and underlying event subtraction algorithm in heavy ion collisions with CMS. This new algorithm uses a data-driven method to estimate the underlying event level from the forward calorimeter energy distribution, taking into account possible flow modulation. Unlike jet-level subtraction methods, this approach produces a fully subtracted "hard event" as input to algorithms such as anti-kT, that automatically clusters to the hard jets. We show its improved performance to the CMS iterative pile-up subtraction, and also compare to other jet reconstruction strategies currently used in heavy ion collisions.
| On behalf of collaboration: | CMS |
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Primary author
Yue Shi Lai
(Massachusetts Inst. of Technology (US))
