Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prospects of Direct Determination of |V_tq| CKM Matrix Elements at the
  LHC   The prospects of measuring the CKM matrix elements |V_tq| with top quarks
decays at the LHC are discussed here, with the top quarks produced in the
processes pp \rightarrow ttbarX and pp \rightarrow t/tbarX, and the subsequent
decays t \rightarrow Ws and/or tbar \rightarrow Wsbar. As for the direct
measurement of |V_tb|, there is also a lot of interest in the direct
measurements of |V_ts| and |V_td|, as the absolute values of these CKM matrix
elements can be modified by approximately a factor 2 from their SM values.
Direct determination of these matrix elements will require a good tagging of
the t \rightarrow s transition (for |V_ts|) and t \rightarrow d transition (for
|V_td|) in the top quark decays, and a very large top quark statistics, which
is available at the LHC. Lacking a good tagging for the t \rightarrow d
transition, and also because of the small size of the CKM-matrix element,
|V_td| = O(10^-2), direct measurements of |V_ts| at the LHC with main emphasis
at the centre of mass energy sqrt(s) of 14 TeV/c^2 based on the PLB paper of
Ali et al. [1] are shown. Alternative methods for direct |V_tq| determination
at the LHC are also reported.

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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph