PoS - Proceedings of Science
Volume 276 - Fourth Annual Large Hadron Collider Physics (LHCP2016) - Poster: Higgs physics in the Standard Model and beyond
Boosting Higgs Pair Production in the bbbb Final State with Multivariate Techniques
J.K. Behr
Full text: pdf
Pre-published on: September 14, 2016
Published on: March 28, 2017
Abstract
In this contribution we present a new strategy for measuring Higgs pair production in the $b\bar{b}b\bar{b}$ final state at the Large Hadron Collider (LHC) and its future high-luminosity upgrade, the HL-LHC. This process is of particular interest as it allows for the extraction of the Higgs trilinear coupling and therefore provides a crucial test of electroweak symmetry breaking. Moreover, it is sensitive to effects of physics beyond the Standard Model. The measurement of Higgs pair production is therefore considered one of the key goals of LHC physics programme. In our analysis, we take into account all possible Higgs decay topologies to provide optimal sensitivity over a large kinematic range. Our analysis combines
a traditional cut-based approach with multivariate analysis techniques and has been shown to be robust in a high pile-up environment. All relevant backgrounds are taken into account, including the $2b2j$ component of QCD multi-jet production, which yields a non-negligible contribution due to light- and charm-quark jet mis-identification. We obtain a signal significance of $S/B\simeq 3$ for an integrated luminosity of $L = 3$~ab$^{-1}$ and show that, pending various experimental improvements, the $b\bar{b}b\bar{b}$ final state alone may allow for the observation of Higgs pair production at the HL-LHC.
DOI: https://doi.org/10.22323/1.276.0182
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