Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Survival of New Physics: An Anomaly-free Neutral Gauge Boson at the LHC   An anomaly-free $U(1)'$ effective Lagrangian as the most common new physics
beyond the standard model is proposed to survey the maximal parameter space
constrained by electroweak precise measurements at the LEP and direct detection
in dilepton decay channel at the LHC at $\sqrt{s}=7$ TeV. By the global fit of
effective couplings of $Z$ boson to the SM fermions,
$\Delta_{11},\Delta_{21},g_2\Delta_{31}$ related to mixings and $r$ related to
$U(1)'$ charge assignment are bounded. The allowed areas are plotted in the not
only $r$-$g_2$ but also $m_{Z'}$-$g_2$ planes, which show that a sub-TeV $Z'$
is still permissible as long as the coupling $g_2\sim 0.01$. The results
provides a prime requirement to an extra $U(1)'$ gauge boson and hinds the
direction of possible new physics beyond the standard model. The possible
signal in dilepton decay channel at LHC at $\sqrt{s}=14$ TeV is also provided.

21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
9
The categories of this paper are: nlin