Source-linked AI summary
Jet substructure as a new Higgs search channel at the LHC
Jonathan M. Butterworth, Adam R. Davison, Mathieu Rubin, Gavin P. Salam
TL;DR
WH and ZH searches with H → b anti-b face acceptance and background challenges. The paper studies boosted VH events using angular jet clustering, declustering, and filtering, finding a 4.5 σ significance for 30 fb−1.,
Problem
WH and ZH production with H → b anti-b are challenging search channels because of detector acceptance limitations and large backgrounds with scales near the light-Higgs mass.
Source: p. 1Method
The analysis uses Cambridge/Aachen angular clustering, Higgs-subjet identification, and filtering that retains the three hardest subjets while reducing underlying-event contamination.
Source: p. 2Results
4.5 σ significance is obtained for the combined channels with 30 fb−1, rising to 8.2 σ for 100 fb−1.
Source: p. 4Takeaways & Limitations
Boosted WH and ZH channels can provide promising light-Higgs search sensitivity and separate information on the Higgs couplings to W and Z bosons.
Source: pp. 1, 4Recovering signal with hadronically decaying associated bosons is left for future study.
Source: p. 3
Abstract
from arXiv · showhide
It is widely considered that, for Higgs boson searches at the Large Hadron Collider, WH and ZH production where the Higgs boson decays to b anti-b are poor search channels due to large backgrounds. We show that at high transverse momenta, employing state-of-the-art jet reconstruction and decomposition techniques, these processes can be recovered as promising search channels for the standard model Higgs boson around 120 GeV in mass.