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1 | /* |
2 | <one line to give the library's name and an idea of what it does.> | |
3 | Copyright (C) 2011 Oystein Djuvsland <oystein.djuvsland@gmail.com> | |
4 | ||
5 | This library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | This library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with this library; if not, write to the Free Software | |
17 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | ||
20 | #include <cstdio> | |
21 | #include <iostream> | |
22 | #include "starlightpythia.h" | |
23 | #include "pythiaInterface.h" | |
24 | #include "spectrumprotonnucleus.h" | |
25 | #include <cmath> | |
26 | #include <sstream> | |
27 | ||
28 | starlightPythia::starlightPythia(beamBeamSystem& bbsystem) : eventChannel(bbsystem) | |
29 | ,_spectrum(0) | |
30 | ,_doDoubleEvent(false) | |
31 | ,_minGammaEnergy(inputParametersInstance.minGammaEnergy()) | |
32 | ,_maxGammaEnergy(inputParametersInstance.maxGammaEnergy()) | |
33 | ,_fullEventRecord(false) | |
34 | { | |
35 | } | |
36 | ||
37 | starlightPythia::~starlightPythia() | |
38 | { | |
39 | ||
40 | } | |
41 | ||
42 | int starlightPythia::init(std::string pythiaParams, bool fullEventRecord) | |
43 | { | |
44 | _fullEventRecord = fullEventRecord; | |
45 | _spectrum = new spectrumProtonNucleus(&_bbs); | |
46 | //_spectrum = new Spectrum(&bbs); | |
47 | ||
48 | _spectrum->setMinGammaEnergy(_minGammaEnergy); | |
49 | _spectrum->setMaxGammaEnergy(_maxGammaEnergy); | |
50 | ||
51 | if(!_doDoubleEvent) | |
52 | { | |
53 | _spectrum->generateKsingle(); | |
54 | } | |
55 | else | |
56 | { | |
57 | _spectrum->generateKdouble(); | |
58 | } | |
59 | ||
60 | // Set to run with varying energies | |
61 | pythiaInterface::pygive("mstp(171)=1"); // Varying energies | |
62 | pythiaInterface::pygive("mstp(172)=1"); // Set the energy before generation | |
63 | ||
64 | std::stringstream ss(pythiaParams); | |
65 | std::string p; | |
66 | while(std::getline(ss, p, ';')) | |
67 | { | |
68 | if(p.size()>1) | |
69 | { | |
70 | pythiaInterface::pygive(p.c_str()); | |
71 | } | |
72 | } | |
73 | //pythiaInterface::pygive("mstp(12)=0"); | |
74 | //pythiaInterface::pygive("mstj(21)=0"); // Disable decays of particles | |
75 | ||
76 | //pythiaInterface::pygive("parp(2)=1.0"); // Cut off c.m. energy (GeV) | |
77 | ||
78 | pythiaInterface::pyinit("FIXT", "gamma", "p", _maxGammaEnergy); // Fixed target, beam, target, beam momentum (GeV/c) | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | upcEvent starlightPythia::produceEvent() | |
84 | { | |
85 | upcEvent event; | |
86 | ||
87 | ||
88 | ||
89 | if (!_doDoubleEvent) | |
90 | { | |
91 | //int zdirection = (Randy.Rndom()) < 0.5 ? -1 : 1; | |
92 | double gammaE = 0; | |
93 | do | |
94 | { | |
95 | gammaE = _spectrum->drawKsingle(); | |
96 | } while(isnan(gammaE)); | |
97 | event.addGamma(gammaE); | |
98 | ||
99 | char opt[32]; | |
100 | std::sprintf(opt, "parp(171)=%f", gammaE/_maxGammaEnergy); | |
101 | pythiaInterface::pygive(opt); // Set the energy of the photon beam (gammaE/1000 * 1000.0); | |
102 | pythiaInterface::pyevnt(); // Generate event | |
103 | // pythiaInterface::pyfram(2); // go to CMS | |
104 | ||
105 | int zdirection = (_bbs.beam1().Z()==1 ? 1 : -1); | |
106 | double boost = acosh(_bbs.beamLorentzGamma())*zdirection; | |
107 | ||
108 | vector3 boostVector(0, 0, tanh(boost)); | |
109 | ||
110 | for(int idx = 0; idx < pyjets_.n; idx++) | |
111 | { | |
112 | // if(std::abs(pyjets_.k[1][idx]) <= 6) std::cout << "Quark: " << pyjets_.k[1][idx] << ", status: " << pyjets_.k[0][idx] << std::endl; | |
113 | if(pyjets_.k[0][idx] > 10 && _fullEventRecord==false) continue; | |
114 | int pdgCode = pyjets_.k[1][idx]; | |
115 | int charge = 0; | |
116 | if( pdgCode == 12 || pdgCode == 14 || pdgCode == 16 || pdgCode == 22 || pdgCode == 111 || pdgCode == 130 || pdgCode == 321 || pdgCode == 2112) | |
117 | { | |
118 | charge = 0; | |
119 | } | |
120 | else | |
121 | { | |
122 | charge = (pdgCode > 0) - (pdgCode < 0); | |
123 | } | |
124 | ||
125 | starlightParticle particle(pyjets_.p[0][idx], pyjets_.p[1][idx], -zdirection*pyjets_.p[2][idx], pyjets_.p[3][idx], pyjets_.p[4][idx], pyjets_.k[1][idx], charge); | |
126 | if(_fullEventRecord) | |
127 | { | |
128 | // particle.setParent(pyjets_.k[2][idx]); | |
129 | particle.setFirstDaughter(pyjets_.k[3][idx]); | |
130 | particle.setLastDaughter(pyjets_.k[4][idx]); | |
131 | particle.setStatus(pyjets_.k[0][idx]); | |
132 | } | |
133 | particle.Boost(boostVector); | |
134 | event.addParticle(particle); | |
135 | } | |
136 | ||
137 | } | |
138 | return event; | |
139 | } |