Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for Diphoton Events with Large Missing Transverse Energy in
  proton-antiproton collisions at sqrt(s) = 1.8 TeV   A search for signals of new physics has been carried out in the channel p
pbar -> gamma gamma + ETmiss. This signature is expected in various recently
proposed supersymmetric (SUSY) models. We observe 842 events with two photons
having transverse momentum ET(g) > 12 GeV and pseudorapidity |eta(g)| < 1.1. Of
these, none have missing transverse energy (ETmiss) in excess of 25 GeV. The
distribution of ETmiss is consistent with that of the expected background. We
therefore set limits on production cross sections for selectron, sneutrino and
neutralino pairs, decaying into photons. The limits range from about 400 fb to
1 pb depending on the sparticle masses. A general limit of 185 fb (95% C.L.) is
set on sigma.B(pbar p -> gamma gamma ETmiss + X) where ET(g) > 12 GeV, |eta(g)|
< 1.1, and ETmiss > 25 GeV.

21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin