Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetic Transition Form Factors of Nucleon Resonances   Recent measurements of nucleon resonance transition form factors with CLAS at
Jefferson Lab are discussed. The new data resolve a long-standing puzzle of the
nature of the Roper resonance, and confirm the assertion of the symmetric
constituent quark model of the Roper as the first radial excitation of the
nucleon. The data on $n\pi^+$ production at high $Q^2$ confirm the slow fall
off of the $S_{11}(1535)$ transition form factor with $Q^2$, and better
constrain the branching ratios $\beta_{N\pi}=0.50$ and $\beta_{N\eta}=0.45$.
Also, new results on the transition amplitudes for the $D_{13}(1520)$ resonance
are presented showing a rapid change from helicity 3/2 dominance seen at the
real photon point to helicty 1/2 dominance at higher $Q^2$.

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The categories of this paper are: stat
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The categories of this paper are: eess
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
18
The categories of this paper are: econ