NiNi_2AGeV_ee.C

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{
    //
    // thermal source model of Ni+Ni 2 AGeV   (R.H. 28/8/2000)
    //
    
    Float_t Eb    = 2.0;     // beam energy in AGeV
    Float_t T     = 0.089;   // temperature in GeV
    Float_t blast = 0.30;    // radial expansion velocity
    
    
    PFireball *sourceA = new PFireball("p",Eb,T,0.,1.,blast,0.0,0.,0.,0.);
    sourceA->Print();
    PFireball *sourceB = new PFireball("n",Eb,T,0.,1.,blast,0.0,0.,0.,0.);
    sourceB->Print();
    PFireball *sourceC = new PFireball("d",Eb,T,0.,1.,blast,0.0,0.,0.,0.);
    sourceC->Print();
    
    PFireball *source1 = new PFireball("pi0",Eb,T,0.,1.,blast,1.0,0.,0.,0.);
    source1->Print();
    PFireball *source2 = new PFireball("pi+",Eb,T,0.,1.,blast,1.0,0.,0.,0.);
    source2->Print();
    PFireball *source3 = new PFireball("pi-",Eb,T,0.,1.,blast,1.0,0.,0.,0);
    source3->Print();
    PFireball *source4 = new PFireball("eta",Eb,T,0.,1.,blast,1.0,0.,0.,0);
    source4->Print();
    PFireball *source5 = new PFireball("w",Eb,T,0.,1.,blast,1.0,0.,0.,0.);
    source5->Print();
    PFireball *source6 = new PFireball("w",Eb,T,0.,1.,blast,1.0,0.,0.,0.);
    source6->Print();
    PFireball *source7 = new PFireball("rho0",Eb,T,0.,1.,blast,1.0,0.,0.,0.);
    source7->Print();
    PFireball *source8 = new PFireball("phi",Eb,T,0.,1.,blast,1.0,0.,0.,0.);
    source8->Print();
    PFireball *source9 = new PFireball("phi",Eb,T,0.,1.,blast,1.0,0.,0.,0.);
    source9->Print();
 
    PFireball *sourceD = new PFireball("D0",Eb,T,0.,1.,blast,0.0,0.,0.,0.);
    sourceD->Print();
 
 
    Float_t Mprot  = 12.3;       // proton
    Float_t Mneut  = 13.3;       // neutron
    Float_t Mdeut  = 1.2;        // deuteron (= 10% of proton)
    // <Apart> = 12.3 + 13.3 + 2*1.2 = 28
    
    Float_t Mpi0   = 2.77;       // pi0 multiplicity in Ni+Ni 2 AGeV
    Float_t Mpip   = 2.63;       // pi+ 
    Float_t Mpim   = 2.91;       // pi- 
    Float_t Meta   = 0.123;      // eta 
    Float_t Momega = 0.015;      // omega 
    Float_t Mrho0  = 0.015;      // rho0
    Float_t Mphi   = 0.0015;     // phi 
    Float_t MDelta = 3./2.*Mpi0; // Delta0 + Delta+
    Float_t Mpn    = 1.0e-3;     // pn virtual bremsstrahlung
    
    Float_t enhance = 1.e4;      // enhancement factor
    
    Momega *= enhance;
    Mrho0 *= enhance;
    Mphi *= enhance;
    MDelta *= 100.;
    Mpn *= 100.;
    
    sourceA->SetW(1.0);  // set source weights
    sourceB->SetW(1.0);
    sourceC->SetW(1.0);
    source1->SetW(1.0);
    source2->SetW(1.0);
    source3->SetW(1.0);
    source4->SetW(1.0);
    source5->SetW(1.0/enhance);
    source6->SetW(1.0/enhance);
    source7->SetW(1.0/enhance);
    source8->SetW(1.0/enhance);
    source9->SetW(1.0/enhance);
    sourceD->SetW(1.0/100.);
    //sourceP->SetW(1.0/enhance);
    
    //                      makeChannel(nMax, nMean, Ebeam)
    
    PChannel *cA = sourceA->makeChannel(30,Mprot);          // p
    PChannel *cB = sourceB->makeChannel(30,Mneut);          // n
    PChannel *cC = sourceC->makeChannel(5, Mdeut);          // d
    PChannel *c1 = source1->makeChannel(9, Mpi0);           // pi0
    PChannel *c2 = source2->makeChannel(9, Mpip);           // pi+
    PChannel *c3 = source3->makeChannel(9, Mpim);           // pi-
    PChannel *c4 = source4->makeChannel(1, Meta);           // eta
    PChannel *c5 = source5->makeChannel(1, 5.9e-4*Momega);  // omega-> pi0 e+e-
    PChannel *c6 = source6->makeChannel(1, 7.15e-5*Momega); // omega-> e+e-
    PChannel *c7 = source7->makeChannel(1, 4.48e-5*Mrho0);  // rho0-> e+e-
    PChannel *c8 = source8->makeChannel(1, 3.00e-4*Mphi);   // phi-> e+e-
    PChannel *c9 = source9->makeChannel(1, 1.30e-4*Mphi);   // phi-> eta e+e-
    PChannel *cD = sourceD->makeChannel(1, 4.4e-5*MDelta);  // Delta-> N e+e-
    //PChannel *cP = sourceD->makeChannel(1, Mpn/137.);     // pn-> pn e+e-
    
    PParticle **ptcls;
    
    
    PParticle *pi01  = new PParticle("pi0");  
    PParticle *diel1 = new PParticle("dilepton");
    PParticle *elec1 = new PParticle("e-");
    PParticle *posi1 = new PParticle("e+");
    
    ptcls = c5->GetParticles();
    PParticle *s5_1[] = {ptcls[1], pi01, diel1};
    PParticle *s5_2[] = {diel1, elec1, posi1};
    PChannel  *c5_1 = new PChannel(s5_1,2,1);
    PChannel  *c5_2 = new PChannel(s5_2,2,1);

    
    PParticle *elec2 = new PParticle("e-");
    PParticle *posi2 = new PParticle("e+");
    
    ptcls = c6->GetParticles();
    PParticle *s6_1[] = {ptcls[1], elec2, posi2};
    PChannel  *c6_1 = new PChannel(s6_1,2,1);
    
    
    PParticle *elec3 = new PParticle("e-");
    PParticle *posi3 = new PParticle("e+");
    
    ptcls = c7->GetParticles();
    PParticle *s7_1[] = {ptcls[1], elec3, posi3};
    PChannel  *c7_1 = new PChannel(s7_1,2,1);

    
    PParticle *elec4 = new PParticle("e-");
    PParticle *posi4 = new PParticle("e+");
 
    ptcls = c8->GetParticles();
    PParticle *s8_1[] = {ptcls[1], elec4, posi4};
    PChannel  *c8_1 = new PChannel(s8_1,2,1);

    
    PParticle *eta1  = new PParticle("eta");
    PParticle *diel5 = new PParticle("dilepton");
    PParticle *elec5 = new PParticle("e-");
    PParticle *posi5 = new PParticle("e+");
 
    ptcls = c9->GetParticles();
    PParticle *s9_1[] = {ptcls[1], eta1, diel5};
    PParticle *s9_2[] = {diel5, elec5, posi5};
    PChannel  *c9_1 = new PChannel(s9_1,2,1);
    PChannel  *c9_2 = new PChannel(s9_2,2,1);

    
    PParticle *neutron  = new PParticle("n");
    PParticle *diel6 = new PParticle("dilepton");
    PParticle *elec6 = new PParticle("e-");
    PParticle *posi6 = new PParticle("e+");
 
    ptcls = cD->GetParticles();
    PParticle *sD_1[] = {ptcls[1], neutron, diel6};
    PParticle *sD_2[] = {diel6, elec6, posi6};
    PChannel  *cD_1 = new PChannel(sD_1,2,1);
    PChannel  *cD_2 = new PChannel(sD_2,2,1);

    
    PChannel *cc[] = {
    c1,c4,              /* pi0, eta     */
    c5,c5_1,c5_2,       /* omega Dalitz */
    c6,c6_1,            /* omega direct */
    c7,c7_1,            /* rho0         */
    c8,c8_1,            /* phi direct   */
    c9,c9_1,c9_2,       /* phi Dalitz   */
    cD,cD_1,cD_2        /* Delta Dalitz */
    };
    
    PReaction *r = new PReaction(cc, "NiNi_2AGeV_ee_1ns", 17, 0, 0, 0, 1);
    r->Print();
    //r->setUserSelection((void*)&select);   // this works for compiled function
    //r->setUserSelection(select);           // this does not work for compiled!!!
    //r->setUserSelection(testSelect);       // this works for interpreted function
    r->setDecayAll(1.); // decay all particles with tau < 1 ns 
    r->setHGeant(0);    // set to 1, if PLUTO is run from HGeant prompt
    r->loop(100000);
}