Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Potential for optimizing Higgs boson CP measurement in H to tau tau
  decay at LHC and ML techniques   We investigate potential for measuring CP state of the Higgs boson in the H
to tau tau$ decay with consecutive tau-lepton decays in channels: tau^+- to
rho^+- nu_tau and tau^+- to a1^+- nu_tau combined. Subsequent decays rho^+- to
pi^+- pi^0, a1^+- to rho^0 pi^+- and rho^0 to pi^+ pi^- are taken into account.
We will explore extensions of the method, where acoplanarity angle for the
planes build on the visible decay products, pi^+- pi^0 of tau^+- to pi^pm pi^0
nu_tau, was used. The angle is sensitive to transverse spin correlations, thus
to parity.
  We show, that in the case of the cascade decays of tau to a1 nu, information
on the CP state of Higgs can be extracted from the acoplanarity angles as well.
Because in the cascade decay a1^+- to rho^0 pi^pm,rho^0 to pi^+ pi^- up to four
planes can be defined, up to 16 distinct acoplanarity angles are available for
H \to tau tau to a1^+ a1^- nu nu decays. These acoplanarities carry in part
supplementary but also correlated information. It is thus cumbersome to
evaluate an overall sensitivity.
  We investigate sensitivity potential of such analysis, by developing and
implementing model in the Machine Learning (ML) techniques. We quantify
possible improvements when multi-dimensional phase-space of outgoing decay
products directions is used, instead of 1-dimensional projections i.e. the
acoplanarity angles.
  We do not take into account ambiguities resulting from detector uncertainties
or background contamination, we concentrate on usefulness of ML methods and tau
to 3pi nu decays for Higgs boson parity measurement.

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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
11
The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: cond-mat