Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vector-like top/bottom quark partners and Higgs physics at the LHC   Vector-like quarks (VLQs) that are partners of the heavy top and bottom
quarks are predicted in many extensions of the Standard Model (SM). We explore
the possibility that these states could explain not only the longstanding
anomaly in the forward-backward asymmetry in $b$-quark production at LEP,
$A_{\rm FB}^b $, but also the more recent $\sim 2\sigma$ deviation of the cross
section for the associated Higgs production with top quark pairs at the LHC,
$\sigma(pp\to t\bar t H)$. Introducing three illustrative models for VLQs with
different representations under the SM gauge group, we show that the two
anomalies can be resolved while satisfying all other theoretical and
experimental constraints. In this case, the three different models predict VLQ
states in the $1-2$ TeV mass range that can be soon probed at the LHC. In a
second step, we discuss the sensitivity on the VLQ masses and couplings that
could be obtained by means of a percent level accuracy in the measurement of
ratios of partial Higgs decay widths, in particular $\Gamma(H \! \to\!
\gamma\gamma)/\Gamma(H \! \to\! ZZ^*)$ and $\Gamma(H \! \to \! b\bar
b)/\Gamma(H \! \to \! WW^*)$. We show that top and bottom VL partners with
masses up to $\sim 5$ TeV and exotic VLQs with masses in the $10$ TeV range can
be probed at the high-luminosity LHC.

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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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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: q-alg
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: funct-an
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas