Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First FAMU observation of muon transfer from mu-p atoms to higher-Z
  elements   The FAMU experiment aims to accurately measure the hyperfine splitting of the
ground state of the muonic hydrogen atom. A measurement of the transfer rate of
muons from hydrogen to heavier gases is necessary for this purpose. In June
2014, within a preliminary experiment, a pressurized gas-target was exposed to
the pulsed low-energy muon beam at the RIKEN RAL muon facility (Rutherford
Appleton Laboratory, UK). The main goal of the test was the characterization of
both the noise induced by the pulsed beam and the X-ray detectors. The
apparatus, to some extent rudimental, has served admirably to this task.
Technical results have been published that prove the validity of the choices
made and pave the way for the next steps. This paper presents the results of
physical relevance of measurements of the muon transfer rate to carbon dioxide,
oxygen, and argon from non-thermalized excited mu-p atoms. The analysis
methodology and the approach to the systematics errors are useful for the
subsequent study of the transfer rate as function of the kinetic energy of the
mu-p currently under way.

18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat