Boosted objects: a probe of beyond the Standard Model physics (1012.5412v2)

Abstract: We present the report of the hadronic working group of the BOOST2010 workshop held at the University of Oxford in June 2010. The first part contains a review of the potential of hadronic decays of highly boosted particles as an aid for discovery at the LHC and a discussion of the status of tools developed to meet the challenge of reconstructing and isolating these topologies. In the second part, we present new results comparing the performance of jet grooming techniques and top tagging algorithms on a common set of benchmark channels. We also study the sensitivity of jet substructure observables to the uncertainties in Monte Carlo predictions.

• The paper presents a novel use of jet substructure methods to identify hadronic decays from boosted particles in BSM searches.
• It evaluates grooming techniques like filtering, trimming, and pruning to improve mass resolution and signal-to-background ratios.
• The study provides an optimized toolset for LHC experiments, highlighting practical strategies for probing new physics beyond the Standard Model.

Overview of "Boosted objects: a probe of beyond the standard model physics"

The paper "Boosted Objects: A Probe of Beyond the Standard Model Physics" outlines the findings of the hadronic working group at the BOOST2010 workshop. The framework of the paper revolves around the utilization of highly boosted particles as a potent tool in probing physics beyond the Standard Model (BSM) within the Large Hadron Collider (LHC). This document is essential in its review of current methodologies and their implications for BSM searches using substructure analysis of hadronically decaying boosted objects.

The discussion first explores the implications of hadronic decays of boosted particles in identifying unknown particles at the LHC. These include $W^{\pm}$ and $Z^0$ bosons, the top quark, the Higgs boson, and potentially other new particles. As these particles are produced with transverse momentum substantially exceeding their rest mass, they form highly collimated topologies upon decay. Traditional algorithms applied for reconstruction in previous, non-boosted scenarios are incapable of managing these complex structures, necessitating the development of specialized tools and methods for effective reconstruction and isolation of such topologies.

Subsequent sections of the paper take a deep dive into the phenomenology studies concerning boosted hadronic topologies, providing a structured review of established models and techniques. Here, the researchers scrutinize the viability of jet grooming techniques – such as filtering, trimming, and pruning – and top tagging algorithms in a set of predefined benchmark channels. Strong, divergent numerical results were evident in this comparative analysis, leading to a crucial discussion on the precision sensitivities of observable jet substructure to uncertainties inherent in Monte Carlo predictions.

One of the notable highlights is the benchmarking of samples and methods for jet grooming and removal of uncorrelated radiation within jets. The paper systematically dissects the performance of various jet substructure tools, noting improved mass resolution when applied correctly, hence enhancing signal-to-background ratios in boost object reconstructions.

The implications of this research are particularly significant for advancing our understanding of BSM physics. On the practical front, this work provides a comprehensive toolset and methodologies for LHC experiments, geared towards exploiting the multi-TeV regime in search of new physics signatures. Theoretically, the approach and results lend valuable insights into optimizing search strategies by focusing on events involving boosted objects.

Moreover, the research speculates on future developments in jet substructure analysis that could significantly bolster the LHC's potential to uncover new phenomena. Further empirical analysis using LHC data is suggested to refine these tools continuously, enhancing the sensitivity and robustness of future searches in unveiling BSM physics.

In essence, this paper represents a pivotal evaluation of contemporary efforts in BSM searches via hadronic decays of boosted particles at the LHC, setting a foundation for further technological advancements and theoretical explorations in high-energy physics.