Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New signals in pair production of heavy Q=2/3 singlets at LHC   New quark singlets T can be produced in pairs at LHC through standard QCD
interactions, with a large cross section for masses of several hundreds of GeV.
Their charged current decays T Tbar T -> W+ b W- bbar, with semileptonic decay
of the W pair, give a final state l nu bb jj$, as in top pair production. The
mixed decay modes T Tbar -> W+ b H tbar, H t W- bbar -> W+ b W- bbar H, T Tbar
-> W+ b Z tbar, Z t W- bbar -> W+ b W- bbar Z, with H,Z -> jj, yield two more
jets, l nu bb jjjj, or the same state in the latter case for Z -> nu nubar. We
extend previous work examining in detail the extra H and Z contributions and
stressing one of the salient features of the T Tbar -> W+ b W- bbar signal: the
presence of a very energetic charged lepton. We finally compare with the
discovery potential in l nu bbbb jj final states, with four b tags.

29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat