| 1 | /*
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| 2 | * Delphes: a framework for fast simulation of a generic collider experiment
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| 3 | * Copyright (C) 2012-2014 Universite catholique de Louvain (UCL), Belgium
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| 4 | *
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| 5 | * This program is free software: you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation, either version 3 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 |
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| 19 | #ifndef TimeSmearingTail_h
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| 20 | #define TimeSmearingTail_h
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| 21 |
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| 22 | /** \class TimeSmearingTail
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| 23 | *
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| 24 | * Performs transverse time smearing.
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| 25 | *
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| 26 | * \author Michele Selvaggi - UCL, Louvain-la-Neuve
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| 27 | *
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| 28 | * With addition of non-gaussian tails (R+Preghenella, preghenella@bo.infn.it)
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| 29 | * non-gaussian tails can be added on both the left/right side of the peak
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| 30 | * according to the "TailLeft" and "TailRight" parameters
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| 31 | * following a q-gaussian PDF, where Tail is the value of q (=1 for gaussian)
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| 32 | *
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| 33 | */
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| 34 |
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| 35 | #include "classes/DelphesModule.h"
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| 36 | #include "TMath.h"
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| 37 |
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| 38 | class TIterator;
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| 39 | class TObjArray;
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| 40 | class TF1;
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| 41 |
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| 42 | class TimeSmearingTail: public DelphesModule
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| 43 | {
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| 44 | public:
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| 45 | TimeSmearingTail();
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| 46 | ~TimeSmearingTail();
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| 47 |
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| 48 | void Init();
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| 49 | void Process();
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| 50 | void Finish();
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| 51 |
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| 52 | private:
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| 53 |
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| 54 | static Double_t qExp(Double_t x, Double_t q) {
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| 55 | if (TMath::Abs(q - 1.) < 0.001)
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| 56 | return TMath::Exp(x);
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| 57 | if ((1. + (1. - q) * x) > 0.)
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| 58 | return TMath::Power(1. + (1. - q) * x, 1. / (1. - q));
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| 59 | return TMath::Power(0., 1. / (1. - q));
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| 60 | };
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| 61 |
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| 62 | static Double_t qTOF(Double_t *_x, Double_t *_par) {
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| 63 | Double_t x = _x[0];
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| 64 | Double_t sigma = _par[0];
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| 65 | Double_t qR = _par[1];
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| 66 | Double_t qL = _par[2];
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| 67 | Double_t beta = 1. / (2. * sigma * sigma);
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| 68 | //
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| 69 | if (x <= 0.) return qExp(-beta * x * x, qL);
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| 70 | return qExp(-beta * x * x, qR);
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| 71 | };
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| 72 |
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| 73 | TF1 *fSignal;
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| 74 |
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| 75 | Double_t fTimeResolution;
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| 76 | Double_t fTailRight;
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| 77 | Double_t fTailLeft;
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| 78 |
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| 79 | TIterator *fItInputArray; //!
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| 80 |
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| 81 | const TObjArray *fInputArray; //!
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| 82 |
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| 83 | TObjArray *fOutputArray; //!
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| 84 |
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| 85 | ClassDef(TimeSmearingTail, 1)
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| 86 | };
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| 87 |
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| 88 | #endif
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