Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged Higgs Bosons in Naturally Aligned Two Higgs Doublet Models at
  the LHC   Measurements of a Higgs boson at the Large Hadron Collider (LHC) have become
increasingly consistent with the predictions of the Standard Model (SM). This
fact puts severe constraints on many potential low-energy extensions of the
Higgs sector of the SM. In the well-known Two Higgs Doublet Model (2HDM), an
`alignment limit' of parameters readily furnishes one SM-like scalar, and can
be achieved naturally through an underlying symmetry. Among the other physical
states of the 2HDM, a charged scalar $H^\pm$ would provide striking evidence of
new physics if observed. We propose a novel technique for the observation of
the process $pp\to t b H^\pm \to t\bar{t}b\bar{b}$ in the dileptonic decay
channel at the LHC. The reconstruction of events in this channel is complicated
by multiple $b$-jets and unobserved neutrinos in the final state. To determine
the neutrino momenta, we implement a neutrino weighting procedure to study, for
the first time, the $t\bar{t}b\bar{b}$ signature. We further train a pair of
boosted decision trees to reconstruct and classify signal events. We determine
the resulting reach within the context of naturally aligned 2HDMs, such as the
Maximally Symmetric Two Higgs Doublet Model (MS-2HDM). By testing at the
integrated luminosity of 150 fb$^{-1}$ achieved in Run 2 of the LHC, we find
that this channel may restrict the parameter space of a Type-II MS-2HDM with
charged Higgs masses as high as 680 GeV.

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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: cs
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol