From 44b667e59418ba7a18c9aaee41134027e9cdc768 Mon Sep 17 00:00:00 2001
From: "Pyry Runko (Puck)" <pyjorunk@student.jyu.fi>
Date: Thu, 20 Feb 2025 13:43:23 +0200
Subject: [PATCH] building the integral, not finished!
---
src/ipglasma.cpp | 59 +++++++++++++++++++--------------------
src/ipglasma.hpp | 9 +++++-
src/main.cpp | 72 ++++--------------------------------------------
3 files changed, 43 insertions(+), 97 deletions(-)
diff --git a/src/ipglasma.cpp b/src/ipglasma.cpp
index 97df109..bcc31d2 100644
--- a/src/ipglasma.cpp
+++ b/src/ipglasma.cpp
@@ -624,11 +624,14 @@ double IPGlasma::SumAmplitudes(int l)
//TODO: check
double IPGlasma::SumAmplitudes()
{
- double sum = 0.0;
int L = xcoords.size();
+ double z = 0.5;
+ double Q = 0;
+
+
cout << "# Summing with lattice size L = " << L << endl;
+ double sum = 0.0;
WilsonLine quark;
- //int thrownAway = 0;
#pragma omp parallel for reduction(+:sum)
for(int i =0; i < L; i += 1){
for(int j =0; j < L; j += 1){
@@ -636,35 +639,22 @@ double IPGlasma::SumAmplitudes()
int q1[2] = {i,j};
quark = GetWilsonLine(WilsonLineCoordinate(i, j));
double r1 = DistanceToOrigin(q1);
- //#pragma omp parallel for reduction(+:sum) collapse(2)
for(int k =0; k < L; k +=1){
for(int l =0; l < L; l +=1){
int q2[2] = {k,l};
double r2 = DistanceToOrigin(q2);
- if (r1 > 1. && r2 > 1.){
- // cout << "#!!Throwing away large dipole separation!" << endl;
- //cout << "#Quark coordinate indices " << q1[0] << "," << q1[1] << " and " << q2[0] << "," << q2[1] << endl;
- //cout << "#Quark coordinates " << X(q1[0]) << "," << Y(q1[1]) << " and " << X(q2[0]) << "," << Y(q2[1]) << endl;
- //cout << "#Dipole size is " << r1-r2 << endl;
- //cout << "#Dipole amplitude is " << Amplitude(0, q1, q2) << endl;
- // thrownAway += 1;
- continue;
}
+ r = sqrt(pow((X(i)-X(k)),2)+pow(Y(j)-Y(l)),2);
- // Haw w2 = WilsonLine(k,l)
- // Laske w1.MultiplbyHermitianConjugate(w2);
-
- sum += Amplitude(0, q1, q2);
- //sum += Amplitude(0, quark, q2);
+ double WF = WFGammaqqbarLongitudinal(double r, double z, double Q, struct* quark_flavor);
+ sum += Amplitude(0, quark, q2)*WF*WF;
}
}
}
}
cout << "# total sum = " << sum << endl;
- // cout << "# i counted " << iWasHere << " values" << endl;
- // cout << "# threw away " << thrownAway << " values (" << 100.*thrownAway*pow(L,-4) << "%)" << endl;
return sum;
}
@@ -672,25 +662,34 @@ double IPGlasma::SumAmplitudes()
// return longitudinal photon polarization wave function
// source arxiv.org/pdf/hep-ph/0606272
// quark flavor f: 0=u, 1=d
-double IPGlasma::WFGammaqqbar(double r, int f)
+double IPGlasma::WFGammaqqbarLongitudinal(double r, double z, double Q, struct* quark_flavor)
{
//Assuming r is the transverse size of the dipole
//constants: e_f (quark charge), e, N_C,
//variables: r, Q, z, epsilon
//epsilon = sqrt(z(1-z)Q^2-m^2_f
+ double lattice_spacing = xcoords[1]-xcoords[0];
// fine structure constant set to 1/137
- double e = cmath.sqrt(4*cmath.pi*1/137)
- double m = 0.16e-9 //GeV
+ double e = sqrt(4*M_PI*1/137);
+ double m_f = 0.16e-9; //GeV
double e_f;
- if (f){ e_f = -1/3};
- else { e_f = 2/3};
-
- double z = 0.5 //GeV^0
- double QQ = 10 //GeV^2
- double Delta = 0.5 //GeV
- double l = a/100 // << a^-1 (a = lattice const)
- double eps = cmath.sqrt(z*(1-z)*QQ*m_f*m_f)
+ if (f){ e_f = -1/3;}
+ else { e_f = 2/3;}
+
+ double z = 0.5; //GeV^0
+ double Q = sqrt(10); //GeV
+ double Delta = 0.5; //GeV
+ double l = lattice_spacing/100; // << a^-1 (a = lattice const)
+ double eps = sqrt(z*(1-z)*Q*Q*m_f*m_f);
- return e_f*e*cmath.sqrt(NC)*2*Q*z*(1-z)*std::cyl_bessel_k(0, eps*r)0.5/cmath.pi
+ return (e_f*e*sqrt(NC)*2*Q*Q*z*(1-z)*std::cyl_bessel_k(0, eps*r)*0.5/M_PI);
+}
+
+// TODO: This has to be done inside the loop in SumAmplitudes
+double IPGlasma::DiffractiveCrossSection()
+{
+
+ SumAmplitudes
+ return 0;
}
diff --git a/src/ipglasma.hpp b/src/ipglasma.hpp
index 1a979b9..81d3050 100644
--- a/src/ipglasma.hpp
+++ b/src/ipglasma.hpp
@@ -61,8 +61,15 @@ public:
double Amplitude(double xpom, WilsonLine quark, int q2[2]);
double SumAmplitudes();
double SumAmplitudes(int l);
-
+ double WFGammaqqbarLongitudinal(double r, double z, double Q, struct* quark_flavor);
+ struct q_flavor(double e_charge, double mass);
+ //TODO: missä paras asettaa arvot?
+ struct q_flavor{
+ double e_charge;
+ double mass;
+ }
+
private:
diff --git a/src/main.cpp b/src/main.cpp
index d130de9..46f1543 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -55,66 +55,6 @@ int printDipoleAmplitudes(string fname, IPGlasma ipglasma)
return 0;
}
- int thread_id = omp_get_thread_num();
- int num_threads = omp_get_num_threads();
-
- // Print the number of threads (only from the master thread to avoid too many prints)
- if (thread_id == 0) {
- cout << "# Number of threads: " << num_threads << endl;
- }
-
- // Print the thread id for debugging (can be limited to a few threads for easier reading)
- if (thread_id < 5) { // Change 5 to a larger number if needed
- cout << "# Thread " << thread_id << " is starting" << endl;
- }
-
- }
- cout << "# Hello from main.cpp sumAmplitudes!" << endl;
- double sum = 0.0;
- int L = 512; //ipglasma->xcoords.size();
- cout << "# Summing with lattice size L = " << L << endl;
- //WilsonLine quark;
- //int thrownAway = 0;
- //int iWasHere = 0;
- #pragma omp parallel for reduction(+:sum)//,thrownAway,iWasHere) //collapse(4)
-
- for(int i =0; i < L; i += 1){
- for(int j =0; j < L; j += 1){
-
- //#pragma omp parallel for reduction(+:sum) collapse(2)
- for(int k =0; k < L; k +=1){
-// cout << "# Thread " << omp_get_thread_num() << " is processing (" << i << ", " << j << ", " << k <<")" << endl;
- for(int l =0; l < L; l +=1){
- int q1[2] = {i,j};
- double r1 = ipglasma->DistanceToOrigin(q1);
- int q2[2] = {k,l};
- //double r1 = ipglasma->DistanceToOrigin(q1);
- double r2 = ipglasma->DistanceToOrigin(q2);
- if (r1 > 1. && r2 > 1.){
- // cout << "#!!Throwing away large dipole separation!" << endl;
- //cout << "#Quark coordinate indices " << q1[0] << "," << q1[1] << " and " << q2[0] << "," << q2[1] << endl;
- //cout << "#Quark coordinates " << X(q1[0]) << "," << Y(q1[1]) << " and " << X(q2[0]) << "," << Y(q2[1]) << endl;
- //cout << "#Dipole size is " << r1-r2 << endl;
- //cout << "#Dipole amplitude is " << Amplitude(0, q1, q2) << endl;
- //thrownAway += 1;
- continue;
- }
-
- // Haw w2 = WilsonLine(k,l)
- // Laske w1.MultiplbyHermitianConjugate(w2);
-
- sum += ipglasma->Amplitude(0, q1, q2);
- //sum += Amplitude(0, quark, q2);
- //iWasHere += 1;
- }
- }
- }
- }
- cout << "# total sum = " << sum << endl;
- //cout << "# i counted " << iWasHere << " values" << endl;
- //cout << "# threw away " << thrownAway << " values (" << 100.*thrownAway*pow(L,-4) << "%)" << endl;
- return sum;
-}
int main(int argc, char* argv[])
{
@@ -125,20 +65,20 @@ int main(int argc, char* argv[])
string fname = argv[1];
IPGlasma ipglasma(fname, 0, BINARY);
- int task_id = 0;
+ if (!argv[2]){
+ printDipoleAmplitudes(fname, ipglasma);
+ }
+ int task_id = 0;
if (argc > 3){
task_id= atoi(argv[3]);
cout << "#Integrating array job #" << task_id << endl;
- ipglasma->SumAmplitudes(task_id);
+ ipglasma.SumAmplitudes(task_id);
}
- else if (!argv[2]){
- printDipoleAmplitudes(fname, ipglasma);
- }
else{
- double sum = ipglasma->SumAmplitudes();
+ double sum = ipglasma.SumAmplitudes();
// Save results
//std::filesystem::create_directory("output_"+fname);
ofstream outfile("da_sum_ +" + fname + ".txt");
--
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