Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for Isolated Leptons with Missing pt and Multi-leptons at HERA   A search for events with one or more isolated leptons in the final state is
performed on a data sample collected in e+-p collisions with the H1 and ZEUS
detectors at the HERA collider. The data sample corresponds to an integrated
luminosity of ~1 fb-1, representing the full HERA high-energy data set. The
yields of single, di- and tri-lepton events are measured and compared to the
Standard Model predictions, looking for possible deviations. No significant
discrepancy with respect to the Standard Model expectations is observed.

33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ