Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Amplitudes and Observables in pp Elastic Scattering at $\sqrt{s}=7$ TeV   A precise analysis of the pp elastic scattering data at 7 TeV in terms of its
amplitudes is performed as an extension of previous studies for lower energies.
Slopes $B_{R}$ and $B_{I}$ of the real and imaginary amplitudes are independent
quantities, and a proper expression for the Coulomb phase is used. The real and
imaginary amplitudes are fully disentangled, consistently with forward
dispersion relations for amplitudes and for slopes. We present analytic
expressions for the amplitudes that cover all $t$ range completely, while
values of total cross section $\sigma$, ratio $\rho$, $B_{I}$ and $B_{R}$ enter
consistently to describe forward scattering.
  It is stressed that the identification of the amplitudes is an essential step
for the description of elastic scattering, and pointed out the importance of
the experimental investigation of the transition range from non-perturbative to
perturbative dynamics, that may confirm the three gluon exchange mechanism
observed at lower energies.

18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: supr-con
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
1
The categories of this paper are: cs