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use eta-phi cuts instead of R-z cuts for track matching, add track momentum cut ...
[u/mrichter/AliRoot.git] / TEvtGen / EvtGenModels / EvtDDalitz.cxx
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da0e9ce3 1//--------------------------------------------------------------------------
2//
3// Environment:
4// This software is part of the EvtGen package developed jointly
5// for the BaBar and CLEO collaborations. If you use all or part
6// of it, please give an appropriate acknowledgement.
7//
8// Copyright Information: See EvtGen/COPYRIGHT
9// Copyright (C) 1998 Caltech, UCSB
10//
11// Module: EvtDDalitz.cc
12//
13// Description: Routine to handle three-body decays of D0/D0_bar or D+/D-
14//
15// Modification history:
16//
17// NK September 3, 1997 Module created
18//
19//------------------------------------------------------------------------
20//
21#include "EvtGenBase/EvtPatches.hh"
22#include <stdlib.h>
23#include "EvtGenBase/EvtParticle.hh"
24#include "EvtGenBase/EvtGenKine.hh"
25#include "EvtGenBase/EvtPDL.hh"
26#include "EvtGenBase/EvtReport.hh"
27#include "EvtGenBase/EvtResonance.hh"
28#include "EvtGenBase/EvtResonance2.hh"
29#include "EvtGenModels/EvtDDalitz.hh"
30#include <string>
31#include "EvtGenBase/EvtConst.hh"
32#include "EvtGenBase/EvtFlatte.hh"
33#include "EvtGenBase/EvtDecayTable.hh"
34using std::endl;
35
36EvtDDalitz::~EvtDDalitz() {}
37
38std::string EvtDDalitz::getName(){
39
40 return "D_DALITZ";
41
42}
43
44
45EvtDecayBase* EvtDDalitz::clone(){
46
47 return new EvtDDalitz;
48
49}
50
51void EvtDDalitz::init(){
52
53 // check that there are 0 arguments
54
55 static EvtId DM=EvtPDL::getId("D-");
56 static EvtId DP=EvtPDL::getId("D+");
57 static EvtId D0=EvtPDL::getId("D0");
58 static EvtId D0B=EvtPDL::getId("anti-D0");
59 static EvtId DSP=EvtPDL::getId("D_s+");
60 static EvtId DSM=EvtPDL::getId("D_s-");
61 static EvtId KM=EvtPDL::getId("K-");
62 static EvtId KP=EvtPDL::getId("K+");
63 static EvtId K0=EvtPDL::getId("K0");
64 static EvtId KB=EvtPDL::getId("anti-K0");
65 static EvtId KL=EvtPDL::getId("K_L0");
66 static EvtId KS=EvtPDL::getId("K_S0");
67 static EvtId PIM=EvtPDL::getId("pi-");
68 static EvtId PIP=EvtPDL::getId("pi+");
69 static EvtId PI0=EvtPDL::getId("pi0");
70
71 static double MPI = EvtPDL::getMeanMass(PI0);
72 static double MKP = EvtPDL::getMeanMass(KP);
73
74
75 checkNArg(0);
76 checkNDaug(3);
77
78 checkSpinParent(EvtSpinType::SCALAR);
79
80 checkSpinDaughter(0,EvtSpinType::SCALAR);
81 checkSpinDaughter(1,EvtSpinType::SCALAR);
82 checkSpinDaughter(2,EvtSpinType::SCALAR);
83
84 EvtId parnum=getParentId();
85 EvtId d1=getDaug(0);
86 EvtId d2=getDaug(1);
87 EvtId d3=getDaug(2);
88 _flag=0;
89 if ( parnum == D0 ) {
90 //look for either a K- pi+ pi0 or K0bar pi+ pi-
91 if ( d1==KM && d2==PIP && d3==PI0 ) { _flag=4; _d1=0; _d2=1; _d3=2;}
92 if ( d1==KM && d3==PIP && d2==PI0 ) { _flag=4; _d1=0; _d2=2; _d3=1;}
93 if ( d2==KM && d1==PIP && d3==PI0 ) { _flag=4; _d1=1; _d2=0; _d3=2;}
94 if ( d2==KM && d3==PIP && d1==PI0 ) { _flag=4; _d1=1; _d2=2; _d3=0;}
95 if ( d3==KM && d1==PIP && d2==PI0 ) { _flag=4; _d1=2; _d2=0; _d3=1;}
96 if ( d3==KM && d2==PIP && d1==PI0 ) { _flag=4; _d1=2; _d2=1; _d3=0;}
97
98 if ( d1==KB && d2==PIP && d3==PIM ) { _flag=3; _d1=0; _d2=2; _d3=1;}
99 if ( d1==KB && d3==PIP && d2==PIM ) { _flag=3; _d1=0; _d2=1; _d3=2;}
100 if ( d2==KB && d1==PIP && d3==PIM ) { _flag=3; _d1=1; _d2=2; _d3=0;}
101 if ( d2==KB && d3==PIP && d1==PIM ) { _flag=3; _d1=1; _d2=0; _d3=2;}
102 if ( d3==KB && d1==PIP && d2==PIM ) { _flag=3; _d1=2; _d2=1; _d3=0;}
103 if ( d3==KB && d2==PIP && d1==PIM ) { _flag=3; _d1=2; _d2=0; _d3=1;}
104
105 if ( d1==KL && d2==PIP && d3==PIM ) { _flag=3; _d1=0; _d2=2; _d3=1;}
106 if ( d1==KL && d3==PIP && d2==PIM ) { _flag=3; _d1=0; _d2=1; _d3=2;}
107 if ( d2==KL && d1==PIP && d3==PIM ) { _flag=3; _d1=1; _d2=2; _d3=0;}
108 if ( d2==KL && d3==PIP && d1==PIM ) { _flag=3; _d1=1; _d2=0; _d3=2;}
109 if ( d3==KL && d1==PIP && d2==PIM ) { _flag=3; _d1=2; _d2=1; _d3=0;}
110 if ( d3==KL && d2==PIP && d1==PIM ) { _flag=3; _d1=2; _d2=0; _d3=1;}
111
112 if ( d1==KS && d2==PIP && d3==PIM ) { _flag=3; _d1=0; _d2=2; _d3=1;}
113 if ( d1==KS && d3==PIP && d2==PIM ) { _flag=3; _d1=0; _d2=1; _d3=2;}
114 if ( d2==KS && d1==PIP && d3==PIM ) { _flag=3; _d1=1; _d2=2; _d3=0;}
115 if ( d2==KS && d3==PIP && d1==PIM ) { _flag=3; _d1=1; _d2=0; _d3=2;}
116 if ( d3==KS && d1==PIP && d2==PIM ) { _flag=3; _d1=2; _d2=1; _d3=0;}
117 if ( d3==KS && d2==PIP && d1==PIM ) { _flag=3; _d1=2; _d2=0; _d3=1;}
118
119
120 if ( d1==KS && d2==KP && d3==KM ) {_flag=5;_d1=0;_d2=2;_d3=1;}
121 if ( d1==KS && d3==KP && d2==KM ) {_flag=5;_d1=0;_d2=1;_d3=2;}
122 if ( d2==KS && d1==KP && d3==KM ) {_flag=5;_d1=1;_d2=2;_d3=0;}
123 if ( d2==KS && d3==KP && d1==KM ) {_flag=5;_d1=1;_d2=0;_d3=2;}
124 if ( d3==KS && d1==KP && d2==KM ) {_flag=5;_d1=2;_d2=1;_d3=0;}
125 if ( d3==KS && d2==KP && d1==KM ) {_flag=5;_d1=2;_d2=0;_d3=1;}
126
127 if ( d1==KL && d2==KP && d3==KM ) {_flag=5;_d1=0;_d2=2;_d3=1;}
128 if ( d1==KL && d3==KP && d2==KM ) {_flag=5;_d1=0;_d2=1;_d3=2;}
129 if ( d2==KL && d1==KP && d3==KM ) {_flag=5;_d1=1;_d2=2;_d3=0;}
130 if ( d2==KL && d3==KP && d1==KM ) {_flag=5;_d1=1;_d2=0;_d3=2;}
131 if ( d3==KL && d1==KP && d2==KM ) {_flag=5;_d1=2;_d2=1;_d3=0;}
132 if ( d3==KL && d2==KP && d1==KM ) {_flag=5;_d1=2;_d2=0;_d3=1;}
133
134 if ( d1==K0 && d2==KP && d3==KM ) {_flag=5;_d1=0;_d2=2;_d3=1;}
135 if ( d1==K0 && d3==KP && d2==KM ) {_flag=5;_d1=0;_d2=1;_d3=2;}
136 if ( d2==K0 && d1==KP && d3==KM ) {_flag=5;_d1=1;_d2=2;_d3=0;}
137 if ( d2==K0 && d3==KP && d1==KM ) {_flag=5;_d1=1;_d2=0;_d3=2;}
138 if ( d3==K0 && d1==KP && d2==KM ) {_flag=5;_d1=2;_d2=1;_d3=0;}
139 if ( d3==K0 && d2==KP && d1==KM ) {_flag=5;_d1=2;_d2=0;_d3=1;}
140 }
141 if ( parnum == D0B ) {
142 //look for either a K+ pi- pi0 or K0 pi+ pi-
143 if ( d1==KP && d2==PIM && d3==PI0 ) { _flag=4; _d1=0; _d2=1; _d3=2;}
144 if ( d1==KP && d3==PIM && d2==PI0 ) { _flag=4; _d1=0; _d2=2; _d3=1;}
145 if ( d2==KP && d1==PIM && d3==PI0 ) { _flag=4; _d1=1; _d2=0; _d3=2;}
146 if ( d2==KP && d3==PIM && d1==PI0 ) { _flag=4; _d1=1; _d2=2; _d3=0;}
147 if ( d3==KP && d1==PIM && d2==PI0 ) { _flag=4; _d1=2; _d2=0; _d3=1;}
148 if ( d3==KP && d2==PIM && d1==PI0 ) { _flag=4; _d1=2; _d2=1; _d3=0;}
149
150 if ( d1==K0 && d2==PIP && d3==PIM ) { _flag=3; _d1=0; _d2=1; _d3=2;}
151 if ( d1==K0 && d3==PIP && d2==PIM ) { _flag=3; _d1=0; _d2=2; _d3=1;}
152 if ( d2==K0 && d1==PIP && d3==PIM ) { _flag=3; _d1=1; _d2=0; _d3=2;}
153 if ( d2==K0 && d3==PIP && d1==PIM ) { _flag=3; _d1=1; _d2=2; _d3=0;}
154 if ( d3==K0 && d1==PIP && d2==PIM ) { _flag=3; _d1=2; _d2=0; _d3=1;}
155 if ( d3==K0 && d2==PIP && d1==PIM ) { _flag=3; _d1=2; _d2=1; _d3=0;}
156
157 if ( d1==KL && d2==PIP && d3==PIM ) { _flag=3; _d1=0; _d2=1; _d3=2;}
158 if ( d1==KL && d3==PIP && d2==PIM ) { _flag=3; _d1=0; _d2=2; _d3=1;}
159 if ( d2==KL && d1==PIP && d3==PIM ) { _flag=3; _d1=1; _d2=0; _d3=2;}
160 if ( d2==KL && d3==PIP && d1==PIM ) { _flag=3; _d1=1; _d2=2; _d3=0;}
161 if ( d3==KL && d1==PIP && d2==PIM ) { _flag=3; _d1=2; _d2=0; _d3=1;}
162 if ( d3==KL && d2==PIP && d1==PIM ) { _flag=3; _d1=2; _d2=1; _d3=0;}
163
164 if ( d1==KS && d2==PIP && d3==PIM ) { _flag=3; _d1=0; _d2=1; _d3=2;}
165 if ( d1==KS && d3==PIP && d2==PIM ) { _flag=3; _d1=0; _d2=2; _d3=1;}
166 if ( d2==KS && d1==PIP && d3==PIM ) { _flag=3; _d1=1; _d2=0; _d3=2;}
167 if ( d2==KS && d3==PIP && d1==PIM ) { _flag=3; _d1=1; _d2=2; _d3=0;}
168 if ( d3==KS && d1==PIP && d2==PIM ) { _flag=3; _d1=2; _d2=0; _d3=1;}
169 if ( d3==KS && d2==PIP && d1==PIM ) { _flag=3; _d1=2; _d2=1; _d3=0;}
170
171 if ( d1==KS && d2==KP && d3==KM ) {_flag=5;_d1=0;_d2=1;_d3=2;}
172 if ( d1==KS && d3==KP && d2==KM ) {_flag=5;_d1=0;_d2=2;_d3=1;}
173 if ( d2==KS && d1==KP && d3==KM ) {_flag=5;_d1=1;_d2=0;_d3=2;}
174 if ( d2==KS && d3==KP && d1==KM ) {_flag=5;_d1=1;_d2=2;_d3=0;}
175 if ( d3==KS && d1==KP && d2==KM ) {_flag=5;_d1=2;_d2=0;_d3=1;}
176 if ( d3==KS && d2==KP && d1==KM ) {_flag=5;_d1=2;_d2=1;_d3=0;}
177
178 if ( d1==KL && d2==KP && d3==KM ) {_flag=5;_d1=0;_d2=1;_d3=2;}
179 if ( d1==KL && d3==KP && d2==KM ) {_flag=5;_d1=0;_d2=2;_d3=1;}
180 if ( d2==KL && d1==KP && d3==KM ) {_flag=5;_d1=1;_d2=0;_d3=2;}
181 if ( d2==KL && d3==KP && d1==KM ) {_flag=5;_d1=1;_d2=2;_d3=0;}
182 if ( d3==KL && d1==KP && d2==KM ) {_flag=5;_d1=2;_d2=0;_d3=1;}
183 if ( d3==KL && d2==KP && d1==KM ) {_flag=5;_d1=2;_d2=1;_d3=0;}
184
185 if ( d1==K0 && d2==KP && d3==KM ) {_flag=5;_d1=0;_d2=1;_d3=2;}
186 if ( d1==K0 && d3==KP && d2==KM ) {_flag=5;_d1=0;_d2=2;_d3=1;}
187 if ( d2==K0 && d1==KP && d3==KM ) {_flag=5;_d1=1;_d2=0;_d3=2;}
188 if ( d2==K0 && d3==KP && d1==KM ) {_flag=5;_d1=1;_d2=2;_d3=0;}
189 if ( d3==K0 && d1==KP && d2==KM ) {_flag=5;_d1=2;_d2=0;_d3=1;}
190 if ( d3==K0 && d2==KP && d1==KM ) {_flag=5;_d1=2;_d2=1;_d3=0;}
191
192 }
193
194 if ( parnum == DP ) {
195 //look for K- pi+ pi+
196 if ( d1==KB && d2==PIP && d3==PI0 ) { _flag=2; _d1=0; _d2=1; _d3=2;}
197 if ( d1==KB && d3==PIP && d2==PI0 ) { _flag=2; _d1=0; _d2=2; _d3=1;}
198 if ( d2==KB && d1==PIP && d3==PI0 ) { _flag=2; _d1=1; _d2=0; _d3=2;}
199 if ( d2==KB && d3==PIP && d1==PI0 ) { _flag=2; _d1=1; _d2=2; _d3=0;}
200 if ( d3==KB && d1==PIP && d2==PI0 ) { _flag=2; _d1=2; _d2=0; _d3=1;}
201 if ( d3==KB && d2==PIP && d1==PI0 ) { _flag=2; _d1=2; _d2=1; _d3=0;}
202
203 if ( d1==KL && d2==PIP && d3==PI0 ) { _flag=2; _d1=0; _d2=1; _d3=2;}
204 if ( d1==KL && d3==PIP && d2==PI0 ) { _flag=2; _d1=0; _d2=2; _d3=1;}
205 if ( d2==KL && d1==PIP && d3==PI0 ) { _flag=2; _d1=1; _d2=0; _d3=2;}
206 if ( d2==KL && d3==PIP && d1==PI0 ) { _flag=2; _d1=1; _d2=2; _d3=0;}
207 if ( d3==KL && d1==PIP && d2==PI0 ) { _flag=2; _d1=2; _d2=0; _d3=1;}
208 if ( d3==KL && d2==PIP && d1==PI0 ) { _flag=2; _d1=2; _d2=1; _d3=0;}
209
210 if ( d1==KS && d2==PIP && d3==PI0 ) { _flag=2; _d1=0; _d2=1; _d3=2;}
211 if ( d1==KS && d3==PIP && d2==PI0 ) { _flag=2; _d1=0; _d2=2; _d3=1;}
212 if ( d2==KS && d1==PIP && d3==PI0 ) { _flag=2; _d1=1; _d2=0; _d3=2;}
213 if ( d2==KS && d3==PIP && d1==PI0 ) { _flag=2; _d1=1; _d2=2; _d3=0;}
214 if ( d3==KS && d1==PIP && d2==PI0 ) { _flag=2; _d1=2; _d2=0; _d3=1;}
215 if ( d3==KS && d2==PIP && d1==PI0 ) { _flag=2; _d1=2; _d2=1; _d3=0;}
216
217 if ( d1==KM && d2==PIP && d3==PIP ) { _flag=1; _d1=0; _d2=1; _d3=2;}
218 if ( d2==KM && d1==PIP && d3==PIP ) { _flag=1; _d1=1; _d2=0; _d3=2;}
219 if ( d3==KM && d1==PIP && d2==PIP ) { _flag=1; _d1=2; _d2=0; _d3=1;}
220 }
221
222 if ( parnum == DM ) {
223 //look for K- pi+ pi+
224 if ( d1==K0 && d2==PIM && d3==PI0 ) { _flag=2; _d1=0; _d2=1; _d3=2;}
225 if ( d1==K0 && d3==PIM && d2==PI0 ) { _flag=2; _d1=0; _d2=2; _d3=1;}
226 if ( d2==K0 && d1==PIM && d3==PI0 ) { _flag=2; _d1=1; _d2=0; _d3=2;}
227 if ( d2==K0 && d3==PIM && d1==PI0 ) { _flag=2; _d1=1; _d2=2; _d3=0;}
228 if ( d3==K0 && d1==PIM && d2==PI0 ) { _flag=2; _d1=2; _d2=0; _d3=1;}
229 if ( d3==K0 && d2==PIM && d1==PI0 ) { _flag=2; _d1=2; _d2=1; _d3=0;}
230
231 if ( d1==KL && d2==PIM && d3==PI0 ) { _flag=2; _d1=0; _d2=1; _d3=2;}
232 if ( d1==KL && d3==PIM && d2==PI0 ) { _flag=2; _d1=0; _d2=2; _d3=1;}
233 if ( d2==KL && d1==PIM && d3==PI0 ) { _flag=2; _d1=1; _d2=0; _d3=2;}
234 if ( d2==KL && d3==PIM && d1==PI0 ) { _flag=2; _d1=1; _d2=2; _d3=0;}
235 if ( d3==KL && d1==PIM && d2==PI0 ) { _flag=2; _d1=2; _d2=0; _d3=1;}
236 if ( d3==KL && d2==PIM && d1==PI0 ) { _flag=2; _d1=2; _d2=1; _d3=0;}
237
238 if ( d1==KS && d2==PIM && d3==PI0 ) { _flag=2; _d1=0; _d2=1; _d3=2;}
239 if ( d1==KS && d3==PIM && d2==PI0 ) { _flag=2; _d1=0; _d2=2; _d3=1;}
240 if ( d2==KS && d1==PIM && d3==PI0 ) { _flag=2; _d1=1; _d2=0; _d3=2;}
241 if ( d2==KS && d3==PIM && d1==PI0 ) { _flag=2; _d1=1; _d2=2; _d3=0;}
242 if ( d3==KS && d1==PIM && d2==PI0 ) { _flag=2; _d1=2; _d2=0; _d3=1;}
243 if ( d3==KS && d2==PIM && d1==PI0 ) { _flag=2; _d1=2; _d2=1; _d3=0;}
244
245 if ( d1==KP && d2==PIM && d3==PIM ) { _flag=1; _d1=0; _d2=1; _d3=2;}
246 if ( d2==KP && d1==PIM && d3==PIM ) { _flag=1; _d1=1; _d2=0; _d3=2;}
247 if ( d3==KP && d1==PIM && d2==PIM ) { _flag=1; _d1=2; _d2=0; _d3=1;}
248 }
249
250 if ( parnum == DSP ) {
251 if ( d1==KM && d2==KP && d3==PIP ) { _flag=6; _d1=0; _d2=1; _d3=2; }
252 if ( d1==KM && d3==KP && d2==PIP ) { _flag=6; _d1=0; _d2=2; _d3=1; }
253 if ( d2==KM && d1==KP && d3==PIP ) { _flag=6; _d1=1; _d2=0; _d3=2; }
254 if ( d2==KM && d3==KP && d1==PIP ) { _flag=6; _d1=1; _d2=2; _d3=0; }
255 if ( d3==KM && d1==KP && d2==PIP ) { _flag=6; _d1=2; _d2=0; _d3=1; }
256 if ( d3==KM && d2==KP && d1==PIP ) { _flag=6; _d1=2; _d2=1; _d3=0; }
257 }
258
259 if ( parnum == DSM ) {
260 if ( d1==KP && d2==KM && d3==PIM ) { _flag=6; _d1=0; _d2=1; _d3=2; }
261 if ( d1==KP && d3==KM && d2==PIM ) { _flag=6; _d1=0; _d2=2; _d3=1; }
262 if ( d2==KP && d1==KM && d3==PIM ) { _flag=6; _d1=1; _d2=0; _d3=2; }
263 if ( d2==KP && d3==KM && d1==PIM ) { _flag=6; _d1=1; _d2=2; _d3=0; }
264 if ( d3==KP && d1==KM && d2==PIM ) { _flag=6; _d1=2; _d2=0; _d3=1; }
265 if ( d3==KP && d2==KM && d1==PIM ) { _flag=6; _d1=2; _d2=1; _d3=0; }
266 }
267
268 if ( _flag==6) {
269 _kkpi_params.push_back(EvtFlatteParam(MPI, MPI, 0.406));
270 _kkpi_params.push_back(EvtFlatteParam(MKP, MKP, 0.800));
271 }
272
273 if ( _flag==0) {
274 report(ERROR,"EvtGen") << "EvtDDaltiz: Invalid mode."<<endl;
275 assert(0);
276 }
277}
278
279void EvtDDalitz::initProbMax() {
280
281//probmax different for different modes!
282
283 if ( _flag==1 ) {setProbMax(9.6);}
284 if ( _flag==2 ) {setProbMax(147.9);}
285 if ( _flag==3 ) {setProbMax(5000.0);}
286 if ( _flag==4 ) {setProbMax(3000.0);}
287 if ( _flag==5 ) {setProbMax(10000000.0);}
288 if ( _flag==6 ) {setProbMax(50000.0);}
289
290}
291
292void EvtDDalitz::decay( EvtParticle *p){
293
294 static EvtId BP = EvtPDL::getId("B+");
295 static EvtId BM = EvtPDL::getId("B-");
296 static EvtId B0 = EvtPDL::getId("B0");
297 static EvtId B0B = EvtPDL::getId("anti-B0");
298 static EvtId DM=EvtPDL::getId("D-");
299 static EvtId DP=EvtPDL::getId("D+");
300 static EvtId D0=EvtPDL::getId("D0");
301 static EvtId D0B=EvtPDL::getId("anti-D0");
302 static EvtId KM=EvtPDL::getId("K-");
303 static EvtId KP=EvtPDL::getId("K+");
304 static EvtId K0=EvtPDL::getId("K0");
305 static EvtId KB=EvtPDL::getId("anti-K0");
306 static EvtId PIM=EvtPDL::getId("pi-");
307 static EvtId PIP=EvtPDL::getId("pi+");
308 static EvtId PI0=EvtPDL::getId("pi0");
309
310 double oneby2 = 0.707106782;
311
312 bool isBToDK=false;
313 if ( p -> getParent () ) {
314 EvtId parId = p -> getParent()->getId ();
315 if ( ( BP == parId ) || ( BM == parId ) || ( B0 == parId ) ||
316 ( B0B == parId ) )
317 if (EvtDecayTable::getDecayFunc(p->getParent())->getName() == "BTODDALITZCPK") isBToDK=true;
318 }
319
320
321//same structure for all of these decays
322
323 p->initializePhaseSpace(getNDaug(),getDaugs());
324 EvtVector4R moms1 = p->getDaug(_d1)->getP4();
325 EvtVector4R moms2 = p->getDaug(_d2)->getP4();
326 EvtVector4R moms3 = p->getDaug(_d3)->getP4();
327
328 EvtVector4R p4_p;
329 p4_p.set(p->mass(),0.0,0.0,0.0);
330
331 EvtComplex amp(1.0,0.0);
332
333//now determine which D and which decay
334
335//data from Anjos et al, Phys.Rev.D 1993, v.48,num.1,p.56 (E691 resuls)
336//for D+ -> K- pi+ pi+, and from Adler et al, Phys.Lett. B196 (1987), 107
337//(Mark III results) for D+ -> K0bar pi+ pi0.
338 //CLEO results for D0->k-pi+pi0
339
340 if ( _flag==1) {
341
342//have a D+ -> K- pi+ pi+ decay, or charge conjugate
343//Anjos etal e691 - Phys Rev D48, 56 (1993)
344 EvtResonance DplusRes11(p4_p,moms1,moms2,0.78,-60.0,0.0498,0.89610,1);
345 EvtResonance DplusRes12(p4_p,moms3,moms1,0.78,-60.0,0.0498,0.89610,1);//K*(892)
346
347 EvtResonance DplusRes21(p4_p,moms1,moms2,0.53,132.0,0.287,1.429,0);
348 EvtResonance DplusRes22(p4_p,moms3,moms1,0.53,132.0,0.287,1.429,0);//K*(1430)
349
350 EvtResonance DplusRes31(p4_p,moms1,moms2,0.47,-51.0,0.323,1.714,1);
351 EvtResonance DplusRes32(p4_p,moms3,moms1,0.47,-51.0,0.323,1.714,1);//K*(1680)
352
353 amp = amp + oneby2*(-DplusRes11.resAmpl()+DplusRes12.resAmpl()) + oneby2*(DplusRes21.resAmpl() + DplusRes22.resAmpl()) + oneby2*(-DplusRes31.resAmpl()+ DplusRes32.resAmpl());
354
355 }
356
357 if ( _flag==2) {
358
359//have a D+ -> K0bar pi+ pi0 decay
360//adler etal MarkIII - Phys Lett B196, 107 (1987)
361// Results in this paper:
362// Kbar rho+ FitFraction = 68+/-8+/-12 Phase 0
363// Kbar* pi+ 19+/-6+/-6 43+/-23
364// nonres 13+/-7+/-8 250+/-19
365// These numbers below seem not to be exactly the same
366// the phases are equiv to -106=254 and 41
367//
368 EvtResonance DplusKpipi0Res1(p4_p,moms2,moms3,1.00,0.00,0.1512,0.7699,1); //rho+
369 EvtResonance DplusKpipi0Res2(p4_p,moms3,moms1,0.8695,0.7191,0.0498,0.89159,1); //K*0
370
371 amp = 0.9522*EvtComplex(cos(-1.8565),sin(-1.8565)) + 1.00*DplusKpipi0Res1.relBrWig(0) + 0.8695*EvtComplex(cos(0.7191),sin(0.7191))*DplusKpipi0Res2.relBrWig(1);
372
373 }
374
375 if(_flag==3) {
376 // D0 -> K0 pi+ pi- + CC
377 // If it does not come from a B->DK, decay it as D0 or D0bar separatly
378 // if p4_p is D0, moms1 is K0, moms2 is pi-, moms3 is pi+
379 // if p4_p is D0bar, moms1 is K0, moms2 is pi+, moms3 is pi-
380
381 if ( isBToDK ) {
382 // Gamma angle in rad.
383 double gamma = EvtDecayTable::getDecayFunc( p->getParent() )
384 -> getArg( 0 ) ;
385 // Strong phase in rad.
386 double delta = EvtDecayTable::getDecayFunc( p->getParent() )
387 -> getArg( 1 ) ;
388 // Ratio between B->D0K and B->D0barK
389 double A = EvtDecayTable::getDecayFunc( p->getParent() )
390 -> getArg( 2 ) ;
391
392 EvtComplex Factor( fabs( A ) * cos ( delta ) ,
393 fabs( A ) * sin ( delta ) ) ;
394
395 if ( ( p->getParent()->getId() == BP ) ||
396 ( p->getParent()->getId() == B0 ) ) {
397 // the ratio D/Dbar
398 Factor = Factor * EvtComplex( cos ( gamma ) , sin ( gamma ) ) ;
399 if ( p->getId() == D0 ) {
400 // the flavor of the particle has no meaning. But we need
401 // it to know which daughter is pi+ or pi-
402 // M( B+ or B0 ) = f(Dbar) + factor * f(D)
403 // f(Dbar) = amplDtoK0PiPi(pD, K0, pi+, pi-)
404 // f(D) = amplDtoK0PiPi(pD, K0, pi-, pi+)
405 // Then ...
406 amp = amplDtoK0PiPi( p4_p , moms1 , moms3 , moms2 ) +
407 Factor * amplDtoK0PiPi( p4_p , moms1 , moms2 , moms3 ) ;
408 }
409 else {
410 amp = amplDtoK0PiPi( p4_p , moms1 , moms2 , moms3 ) +
411 Factor * amplDtoK0PiPi( p4_p , moms1 , moms3 , moms2 ) ;
412 }
413 }
414 else if ( ( p->getParent() -> getId() == BM ) ||
415 ( p->getParent() -> getId() == B0B ) ) {
416 Factor = Factor * EvtComplex( cos ( gamma ) , - sin ( gamma ) ) ;
417 // here M( B- or B0bar ) = f(D) + factor * f(Dbar) then ...
418 if ( p->getId() == D0 ) {
419 amp = amplDtoK0PiPi( p4_p , moms1 , moms2 , moms3 ) +
420 Factor * amplDtoK0PiPi( p4_p , moms1 , moms3 , moms2 ) ;
421 }
422 else {
423 amp = amplDtoK0PiPi( p4_p , moms1 , moms3 , moms2 ) +
424 Factor * amplDtoK0PiPi( p4_p , moms1 , moms2 , moms3 ) ;
425 }
426 }
427 }
428 else {
429 amp = amplDtoK0PiPi( p4_p , moms1 , moms2 , moms3 ) ;
430 }
431 }
432
433
434 if(_flag==4) {
435
436 EvtResonance2 DKpipi0Res1(p4_p,moms2,moms3,1.0 ,0.0 ,0.1507,0.770 ,1); //rho
437 EvtResonance2 DKpipi0Res2(p4_p,moms1,moms2,0.39, -0.2 ,0.0505,0.8961,1); //k*0
438 EvtResonance2 DKpipi0Res3(p4_p,moms1,moms3,0.44, 163.0 ,0.050 ,0.8915,1); //k*-
439
440 EvtResonance2 DKpipi0Res4(p4_p,moms1,moms3,0.77 ,55.5 ,0.294 ,1.412 ,0); //k01430-
441 EvtResonance2 DKpipi0Res5(p4_p,moms1,moms2,0.85 ,166.0 ,0.294 ,1.412 ,0); //k01430bar
442 EvtResonance2 DKpipi0Res6(p4_p,moms2,moms3,2.5 ,171.0 ,0.240 ,1.700 ,1); //rho1700
443 EvtResonance2 DKpipi0Res7(p4_p,moms1,moms3,2.5 ,103.0 ,0.322 ,1.717 ,1); //K*1680-
444
445
446
447 double pi180inv = 1.0/EvtConst::radToDegrees;
448
449 amp = EvtComplex(1.75*cos(31.2*pi180inv),1.75*sin(31.2*pi180inv))
450 + DKpipi0Res1.resAmpl() + DKpipi0Res2.resAmpl() + DKpipi0Res3.resAmpl()
451 + DKpipi0Res4.resAmpl() + DKpipi0Res5.resAmpl()
452 + DKpipi0Res6.resAmpl()
453 + DKpipi0Res7.resAmpl();
454
455 }
456
457 if(_flag==5) {
458
459 // D0 -> K0 K+ K- + CC
460 // If it does not come from a B->DK, decay it as D0 or D0bar separatly
461 // if p4_p is D0, moms1 is K0, moms2 is pi-, moms3 is pi+
462 // if p4_p is D0bar, moms1 is K0, moms2 is pi+, moms3 is pi-
463
464 if ( isBToDK ){
465 // Gamma angle in rad.
466 double gamma = EvtDecayTable::getDecayFunc( p->getParent() )
467 -> getArg( 0 ) ;
468 // Strong phase in rad.
469 double delta = EvtDecayTable::getDecayFunc( p->getParent() )
470 -> getArg( 1 ) ;
471 // Ratio between B->D0K and B->D0barK
472 double A = EvtDecayTable::getDecayFunc( p->getParent() )
473 -> getArg( 2 ) ;
474
475 EvtComplex Factor( fabs( A ) * cos ( delta ) ,
476 fabs( A ) * sin ( delta ) ) ;
477
478 if ( ( p->getParent()->getId() == BP ) ||
479 ( p->getParent()->getId() == B0 ) ) {
480 // the ratio D/Dbar
481 Factor = Factor * EvtComplex( cos ( gamma ) , sin ( gamma ) ) ;
482 if ( p->getId() == D0 ) {
483 // the flavor of the particle has no meaning. But we need
484 // it to know which daughter is pi+ or pi-
485 // M( B+ or B0 ) = f(Dbar) + factor * f(D)
486 // f(Dbar) = amplDtoK0PiPi(pD, K0, K+, K-)
487 // f(D) = amplDtoK0PiPi(pD, K0, K-, K+)
488 // Then ...
489 amp = amplDtoK0KK( p4_p , moms1 , moms3 , moms2 ) +
490 Factor * amplDtoK0KK( p4_p , moms1 , moms2 , moms3 ) ;
491 }
492 else {
493 amp = amplDtoK0KK( p4_p , moms1 , moms2 , moms3 ) +
494 Factor * amplDtoK0KK( p4_p , moms1 , moms3 , moms2 ) ;
495 }
496 }
497 else if ( ( p->getParent() -> getId() == BM ) ||
498 ( p->getParent() -> getId() == B0B ) ) {
499 Factor = Factor * EvtComplex( cos ( gamma ) , - sin ( gamma ) ) ;
500 // here M( B- or B0bar ) = f(D) + factor * f(Dbar) then ...
501 if ( p->getId() == D0 ) {
502 amp = amplDtoK0KK( p4_p , moms1 , moms2 , moms3 ) +
503 Factor * amplDtoK0KK( p4_p , moms1 , moms3 , moms2 ) ;
504 }
505 else {
506 amp = amplDtoK0KK( p4_p , moms1 , moms3 , moms2 ) +
507 Factor * amplDtoK0KK( p4_p , moms1 , moms2 , moms3 ) ;
508 }
509 }
510 }
511 else {
512 amp = amplDtoK0KK( p4_p , moms1 , moms2 , moms3 ) ;
513 }
514 }
515
516
517
518
519 // Ds -> K K pi
520 if(_flag==6) {
521 EvtResonance2 DsKKpiRes1(p4_p, moms3, moms1, 1.0, 0.0, 0.0455, 0.8944, 1, true); // K*(892)
522 EvtResonance2 DsKKpiRes2(p4_p, moms3, moms1, 1.48, 138., 0.290, 1.414, 0); // K*_0(1430)
523 EvtFlatte DsKKpiRes3(p4_p, moms1, moms2, 5.07, 156., 0.965, _kkpi_params); // f_0(980)
524 EvtResonance2 DsKKpiRes4(p4_p, moms1, moms2, 1.15, -10., 0.00426, 1.019455, 1, true); // phi(1020)
525 EvtResonance2 DsKKpiRes5(p4_p, moms1, moms2, 1.28, 53., 0.265, 1.350, 0); // f_0(1370)
526 EvtResonance2 DsKKpiRes6(p4_p, moms1, moms2, 1.19, 87., 0.137, 1.724, 0); // f_0(1710)
527 amp = DsKKpiRes1.resAmpl() + DsKKpiRes2.resAmpl() + DsKKpiRes3.resAmpl()
528 + DsKKpiRes4.resAmpl() + DsKKpiRes5.resAmpl() + DsKKpiRes6.resAmpl();
529
530 }
531
532
533 vertex(amp);
534
535 return ;
536}
537
538EvtComplex EvtDDalitz::amplDtoK0PiPi(EvtVector4R p4_p, EvtVector4R moms1,
539 EvtVector4R moms2, EvtVector4R moms3) {
540
541 //K*(892)-
542 EvtResonance2 DK2piRes1(p4_p,moms1,moms2,1.418,-190.0,0.0508,0.89166,1);
543 //K0*(1430)
544 EvtResonance2 DK2piRes2(p4_p,moms1,moms2,1.818,-337.0,0.294 ,1.412 ,0);
545 //K2*(1430)
546 EvtResonance2 DK2piRes3(p4_p,moms1,moms2,0.909, -5.0,0.0985,1.4256 ,2);
547 //K*(1680)
548 EvtResonance2 DK2piRes4(p4_p,moms1,moms2,5.091,-166.0,0.322 ,1.717 ,1);
549 //DCS K*(892)
550 EvtResonance2 DK2piRes5(p4_p,moms1,moms3,0.100, -19.0,0.0508,0.89166,1);
551
552 //Rho
553 EvtResonance2 DK2piRes6(p4_p,moms3,moms2,0.909,-340.0,0.1502,0.7693,1);
554 //Omega
555 EvtResonance2 DK2piRes7(p4_p,moms3,moms2,.0336,-226.0,0.00844,0.78257,1);
556 //f0(980)
557 EvtResonance2 DK2piRes8(p4_p,moms3,moms2,0.309,-152.0,0.05,0.977,0);
558 //f0(1370)
559 EvtResonance2 DK2piRes9(p4_p,moms3,moms2,1.636,-255.0,0.272,1.31,0);
560 //f2(1270)
561 EvtResonance2 DK2piRes10(p4_p,moms3,moms2,0.636,-32.0,0.1851,1.2754,2);
562
563 return EvtComplex(1.0,0.0) +
564 DK2piRes1.resAmpl() + DK2piRes2.resAmpl() +
565 DK2piRes3.resAmpl() + DK2piRes4.resAmpl() +
566 DK2piRes5.resAmpl() + DK2piRes6.resAmpl() +
567 DK2piRes7.resAmpl() + DK2piRes8.resAmpl() +
568 DK2piRes9.resAmpl() + DK2piRes10.resAmpl();
569}
570
571//
572// BaBar decay amplitudes for D0->Ks K+ K-
573//
574// p4_p is D0
575// moms1 is K0s
576// moms2 is K+
577// moms3 is K-
578// Amplitudes and phases are taken from BaBar hep-ex/0207089
579// with convention : Non Resonant = Amp 1. / Phase 0.
580
581EvtComplex EvtDDalitz::amplDtoK0KK(EvtVector4R p4_p, EvtVector4R moms1,
582 EvtVector4R moms2, EvtVector4R moms3) {
583
584 //phi
585 EvtResonance DK0KKRes1( p4_p, moms2, moms3, 113.75, -40.0, 0.0043,
586 1.019456, 1 ) ;
587 //a0(980)
588 EvtResonance DK0KKRes2( p4_p, moms2, moms3, 152.25, 69.0, 0.1196 , 0.9847,
589 0 ) ;
590 //f0(980)
591 EvtResonance DK0KKRes3( p4_p, moms2, moms3, 30.5, -201.0, 0.05, 0.980 ,
592 0 ) ;
593 //a0(980)+
594 EvtResonance DK0KKRes4( p4_p, moms1, moms2, 85.75, -93.0, 0.1196 , 0.9847,
595 0 ) ;
596 //a0(980)-
597 EvtResonance DK0KKRes5( p4_p, moms3, moms1, 8. , -53.0 ,0.1196, 0.9847,
598 0 ) ;
599
600 return EvtComplex(1.0,0.0) +
601 DK0KKRes1.resAmpl() + DK0KKRes2.resAmpl() +
602 DK0KKRes3.resAmpl() + DK0KKRes4.resAmpl() +
603 DK0KKRes5.resAmpl() ;
604
605}