Rivet analyses referenceTOTEM_2012_I1220862Measurement of proton-proton elastic scattering and total cross section at $\sqrt{s} = 7 \text{TeV}$Experiment: TOTEM (LHC) Inspire ID: 1220862 Status: VALIDATED Authors:
Beam energies: (3500.0, 3500.0) GeV Run details:
Measurement of the elastic differential cross-section in proton-proton interactions at a centre-of-mass energy $\sqrt{s} = 7 \text{TeV}$ at the LHC. The data, which cover the $|t|$ range $0.005-0.2 \text{GeV}^2$, were collected using Roman Pot detectors very close to the outgoing beam in October 2011, allowing the precise extrapolation down to the optical point, $t = 0$, and hence the derivation of the elastic as well as the total cross-section via the optical theorem. Source code: TOTEM_2012_I1220862.cc 1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/ChargedFinalState.hh"
4
5namespace Rivet {
6
7
8 /// TOTEM elastic and total cross-section measurement
9 class TOTEM_2012_I1220862 : public Analysis {
10 public:
11
12 TOTEM_2012_I1220862()
13 : Analysis("TOTEM_2012_I1220862")
14 { }
15
16
17 void init() {
18 declare(ChargedFinalState(), "CFS");
19 book(_hist_tlow ,1, 1, 1);
20 book(_hist_thigh ,2, 1, 1);
21 book(_hist_sigma ,3, 1, 1);
22 }
23
24
25 void analyze(const Event& event) {
26 const ChargedFinalState& cfs = apply<ChargedFinalState>(event, "CFS");
27 if (cfs.size() > 2) MSG_DEBUG("Final state includes more than two charged particles!");
28 _hist_sigma->fill(sqrtS()/GeV);
29
30 for (const Particle& p : cfs.particles(Cuts::eta > 0)) { // && Cuts::pid == PID::PROTON)) {
31 if (p.pid() != PID::PROTON) continue;
32 const double t = sqr(p.pT());
33 _hist_tlow->fill(t);
34 _hist_thigh->fill(t);
35 }
36 }
37
38
39 void finalize() {
40 normalize(_hist_tlow, crossSection()/millibarn);
41 normalize(_hist_thigh, crossSection()/millibarn);
42 normalize(_hist_sigma, crossSection()/millibarn);
43 }
44
45
46 private:
47
48 Histo1DPtr _hist_tlow, _hist_thigh, _hist_sigma;
49
50 };
51
52
53 RIVET_DECLARE_ALIASED_PLUGIN(TOTEM_2012_I1220862, TOTEM_2012_002);
54
55}
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