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Rivet analyses reference
TOTEM_2014_I1328627
Forward charged particle pseudorapidity density in $pp$ collisions at $\sqrt{s} = 8 \text{TeV}$ using a displaced interaction point
Experiment: TOTEM (LHC)
Inspire ID: 1328627
Status: VALIDATED
Authors:
References:
- EPJ C75,126
- CERN-PH-EP-2014-260
- arXiv: 1411.4963
Beams: p+ p+
Beam energies: (4000.0, 4000.0) GeV
Run details:
- $pp$ QCD interactions at 8 TeV.
The pseudorapidity density of charged particles $\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$ is measured by the TOTEM experiment in $pp$ collisions at $\sqrt{s} = 8$ TeV within the ranges $3.9 < \eta < 4.7$ and $-6.95 < \eta < -6.9$. Data were collected in a low intensity LHC run with collisions occurring at a distance of 11.25\,m from the nominal interaction point. The data sample is expected to include 96--97\% of the inelastic proton--proton interactions. The measurement reported here considers charged particles with $p_T > 0$ MeV/$c$, produced in inelastic interactions with at least one charged particle in $-7 < \eta < -6$ or $3.7 < \eta < 4.8$. The $\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$ has been found to decrease with $|\eta|$, from $5.11 \pm 0.73$ at $\eta = 3.95$ to $1.81 \pm 0.56$ at $\eta = -6.925$.
Source code:
TOTEM_2014_I1328627.cc
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58 | // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
namespace Rivet {
class TOTEM_2014_I1328627 : public Analysis {
public:
TOTEM_2014_I1328627()
: Analysis("TOTEM_2014_I1328627")
{ }
void init() {
ChargedFinalState cfsm(Cuts::etaIn(-7.0, -6.0));
ChargedFinalState cfsp(Cuts::etaIn( 3.7, 4.8));
declare(cfsm, "CFSM");
declare(cfsp, "CFSP");
book(_h_eta ,1, 1, 1);
book(_sumofweights, "sumofweights");
}
void analyze(const Event& event) {
const ChargedFinalState cfsm = apply<ChargedFinalState>(event, "CFSM");
const ChargedFinalState cfsp = apply<ChargedFinalState>(event, "CFSP");
if (cfsm.size() == 0 && cfsp.size() == 0) vetoEvent;
_sumofweights->fill();
for (const Particle& p : cfsm.particles() + cfsp.particles()) {
_h_eta->fill(p.abseta());
}
}
void finalize() {
scale(_h_eta, 1./ *_sumofweights);
}
private:
CounterPtr _sumofweights;
Histo1DPtr _h_eta;
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(TOTEM_2014_I1328627);
}
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