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30 lines
1.5 KiB
TeX
30 lines
1.5 KiB
TeX
\chapter{Phenomenological Studies of the Diphoton Process in Proton-Proton
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Scattering}%
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\label{chap:pheno}
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In real proton scattering the hard process discussed in
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\cref{chap:pdf} is but only a part of the whole picture. Partons do in
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general have some intrinsic transverse momentum. Scattered charges
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radiate in both QCD and QED, the former radiation giving rise to
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parton-showers and additional transverse momentum of the partons. The
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remnants of the proton can radiate showers themselves, scatter in more
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or less hard processes (Multiple Interactions, MI) and affect the hard
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process through color correlation. All of the processes not directly
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connected to the hard process are called the underlying event and have
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to be taken into account to generate events that can be compared with
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experimental data. Finally the partons from the showers recombine into
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hadrons (Hadronization) due to confinement. This last effect doesn't
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produce diphoton-relevant background directly, but affects photon
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isolation.~\cite[11]{buckley:2011ge} % TODO: describe isolation
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These effects can be calculated or modeled on an per-event base by
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modern monte-carlo event generators like \sherpa\footnote{But these
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calculations and models are always approximations.}. This is done
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for the diphoton process in a gradual way described in
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\cref{sec:setupan}. Histograms of observables are generated and are
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being discussed in \cref{sec:disco}.
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%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: "../document"
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%%% End:
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