The HiggsTools Handbook: Concepts and observables for deciphering the Nature of the Higgs Sector
M. Boggia (Freiburg U.), J. M. Cruz-Martinez (Durham U., IPPP), Hjalte, Frellesvig (KIT-TTP), E. W. N. Glover (Durham U., IPPP), Raquel, Gomez-Ambrosio (Durham U., IPPP), Giulia Gonella (Freiburg U.), Y. Haddad, (Durham U., IPPP), Agnieszka Ilnicka (Zurich U., ETH, PSI Villigen)

TL;DR
This report reviews advanced Higgs physics at the LHC, discussing theoretical frameworks for deviations from the Standard Model and introducing a new observable, ${ ext{eta}}^*$, for analyzing Higgs production in photon decays.
Contribution
It introduces the ${ ext{eta}}^*$ observable for Higgs studies and critically reviews frameworks for interpreting deviations from the Standard Model at the LHC.
Findings
The ${ ext{eta}}^*$ variable provides a new tool for Higgs analysis.
Effective field theories and other frameworks are assessed for precision in Higgs physics.
The phenomenology of ${ ext{eta}}^*$ contrasts with Higgs transverse momentum distributions.
Abstract
This Report summarizes some of the activities of the HiggsTools Initial Training Network working group in the period 2015-2017. The main goal of this working group was to produce a document discussing various aspects of state-of-the-art Higgs physics at the Large Hadron Collider (LHC) in a pedagogic manner. The first part of the Report is devoted to a description of phenomenological searches for New Physics at the LHC. As the experimental measurements become more and more precise, there is a pressing need for a consistent framework in which deviations from the SM predictions can be computed precisely. We critically review the use of the \k{appa}-framework, fiducial and simplified template cross sections, effective field theories, pseudo-observables and phenomenological Lagrangians. In the second part of the Report, we propose as a new and complementary observable…
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Particle Detector Development and Performance · Distributed and Parallel Computing Systems
