Speaker
Joshua Isaacson
(Michigan State University)
Description
At the LHC there will be highly boosted W, Z, and Higgs bosons. When these particles decay via the hadronic channel, they may form a single fat jet. We present a perturbative QCD factorization formula for substructures of an energetic Higgs jet, taking the jet energy profile resulting from the $H\to b\bar b$ decay as an example. The formula is written as the convolution of a hard Higgs decay kernel with the jet functions of two $b$ quarks and a soft function that links colors of the two $b$ quarks. In a special factorization scheme with one thin $b$-quark jet and one fat $b$-quark jet, the soft function reduces to unity, and the analysis is greatly simplified. We demonstrate that the energy profile within a Higgs jet, which differs significantly from those of ordinary QCD jets, can improve the Higgs identification in the $H\to b\bar b$ channel at the Large Hadron Collider. Our formalism is then extended to energy profiles of $W$- and $Z$-boson jets.
Authors
Prof.
C.-P. Yuan
(Michigan State University)
Prof.
Hsiang-nan Li
(Academia Sinica, Inst. Phys.)
Joshua Isaacson
(Michigan State University)
Zhao Li
(Michigan State University)
