Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Response evolution of the CMS ECAL and R&D studies for electromagnetic
  calorimetry at the High-Luminosity LHC   While the CMS experiment is currently harvesting LHC collision data at CERN,
the performance of its electromagnetic calorimeter (ECAL) is being constantly
monitored, and work has started to assess the need for changes to the detector
to ensure an adequate performance for High-Luminosity LHC (HL-LHC) running,
which is planned for 2022 and beyond. In this paper, results from CMS running,
beam tests and laboratory measurements are combined to anticipate the detector
performance evolution at the HL-LHC. Further, various R&D studies are
illustrated, that will provide a useful choice for electromagnetic calorimetry
at the HL-LHC.

23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an