Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A study of top-quark Yukawa coupling measurement in e+e- -> t tbar H at
  sqrt(s) = 500 GeV   We report on the feasibility of measuring the top Yukawa coupling in the
process: $e^+e^-\to t\bar{t}H$. This measurement is crucial to test the mass
generation mechanism for matter particles. Since the cross section for this
process attains its maximum around $\sqrt{s}=700 $GeV, most of the past studies
were done assuming this energy region. It has been pointed out, however, that
the QCD threshold correction enhances the cross section significantly and might
enable its measurement at $\sqrt{s}=500 $GeV, which will be accessible already
in the first phase of the ILC project. We have implemented this threshold
enhancement into our $t\bar{t}H$ event generator and carried out Monte Carlo
simulations. Our results show that $t\bar{t}H$ events can be observed with a
significance of $4.1\,\sigma$ with no beam polarization and $5.4 \sigma$ with
the $e^-$ and $e^+$ beam polarization combination: $(-0.8,+0.3)$.

19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio