Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measuring the masses of a pair of semi-invisibly decaying particles in
  central exclusive production with forward proton tagging   We discuss how the mass of new physics particles involved in a pair of short
decay chains leading to two invisible particles, for example slepton pair
production, followed by the decay into two leptons and two neutralinos, may be
measured in central exclusive production (CEP) with forward proton tagging. We
show how the existing mass measurement strategies in CEP may be improved by
making full use of the mass-shell constraints, and demonstrate that, with
around 30 signal events, the masses of the slepton and neutralino can be
measured with an accuracy of a few GeV.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
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
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics