STAR Physics Database

Photon and neutral pion production in Au+Au collisions at sqrt(s_NN) = 130 GeV
J. Adams et al., Phys. Rev. C. 70, 044902 (2004).

Data for Fig. 4 (electron-positron invariant mass plots) and Fig. 6 (number of reconstructed photon conversions as a function of the conversion location) are located at the bottom of the page.

Fig. 5: dE/dx deviant distributions of positive daughters

dE/dx deviant

(σ)

left plot: Background distribution

(counts)

(stat)

right plot: photon candidates distribution

(counts)

(stat)

-2.7

650

25.5

1030

32.1

-2.5

566

23.8

934

30.6

-2.3

420

20.5

809

28.4

-2.1

349

18.7

813

28.5

-1.9

317

17.8

809

28.4

-1.7

271

16.5

809

28.4

-1.5

227

15.1

960

-1.3

190

13.8

1131

33.6

-1.1

204

14.3

1370

-0.9

161

12.7

1712

41.4

-0.7

199

14.1

1949

44.1

-0.5

186

13.6

2291

47.9

-0.3

149

12.2

2520

50.2

-0.1

172

13.1

2639

51.4

0.1

132

11.5

2411

49.1

0.3

118

10.9

2373

48.7

0.5

105

10.2

1918

43.8

0.7

109

10.4

1673

40.9

0.9

9.7

1362

36.9

1.1

8.77

1028

32.1

1.3

8.6

813

28.5

1.5

8.31

530

1.7

8.49

382

19.5

1.9

8.31

321

17.9

2.1

7.81

233

15.3

2.3

8.19

205

14.3

2.5

7.94

149

12.2

2.7

7.62

127

11.3

2.9

6.86

137

11.7

3.1

8.31

122

3.3

6.78

106

10.3

3.5

7.14

9.75

3.7

6.71

9.8

3.9

6.78

9.43

Fig. 7: Corrected photon spectra

Data for the 0-11% most central collisions: the 12% (correlated) uncertainty in the normalization has not been included

p_t

(GeV/c)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy

(mean)

(stat)

(sys)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy (r_xy>40 cm)

(mean)

(stat)

(sys)

0.075

3383

397.7

236.8

4442

545.2

310.9

0.225

772

17.4

54.1

725

50.8

0.375

226

3.38

15.8

214

4.87

0.525

82.2

1.1

5.75

78.2

1.69

5.48

0.675

35.8

0.449

2.51

31.5

0.665

2.21

0.825

16.7

0.349

1.17

14.5

0.504

1.02

0.975

7.96

0.165

0.557

7.39

0.265

0.517

1.125

4.25

0.091

0.298

3.64

0.139

0.255

1.275

2.36

0.0531

0.165

2.08

0.084

0.145

1.425

1.2

0.0291

0.0843

1.12

0.051

0.0787

1.575

0.652

0.0171

0.0456

0.613

0.0311

0.0429

1.725

0.401

0.0117

0.0281

0.331

0.0195

0.0232

1.875

0.231

0.00776

0.0162

2.025

0.126

0.00515

0.00884

2.175

0.0751

0.00371

0.00526

2.325

0.0453

0.0027

0.00317

Data for the 11-34% centrality bin: the 12% (correlated) uncertainty in the normalization has not been included

p_t

(GeV/c)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy

(mean)

(stat)

(sys)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy (r_xy>40 cm)

(mean)

(stat)

(sys)

0.075

2066

369

144.6

2444

451.6

171.1

0.225

397

14.2

27.8

399

19.5

27.9

0.375

116

2.94

8.11

116

4.54

8.09

0.525

40.5

0.94

2.84

41.7

1.61

2.92

0.675

18.3

0.426

1.28

18.6

0.755

1.3

0.825

8.46

0.317

0.592

8.66

0.575

0.606

0.975

4.11

0.155

0.288

0.278

0.28

1.125

1.99

0.0791

0.139

2.13

0.161

0.149

1.275

1.16

0.0524

0.081

0.925

0.0822

0.0647

1.425

0.561

0.0296

0.0393

0.477

0.0501

0.0334

1.575

0.327

0.0196

0.0229

0.288

0.0376

0.0202

1.725

0.188

0.0135

0.0132

0.167

0.0268

0.0117

1.875

0.0878

0.00816

0.00614

2.025

0.0543

0.00614

0.0038

2.175

0.0397

0.00512

0.00278

2.325

0.0285

0.00425

0.00199

Data for the 34-85% centrality bin: the 12% (correlated) uncertainty in the normalization has not been included

p_t

(GeV/c)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy

(mean)

(stat)

(sys)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy (r_xy>40 cm)

(mean)

(stat)

(sys)

0.075

470

39.4

32.9

581

40.7

0.225

94.7

1.86

6.63

102

2.77

7.11

0.375

29.5

0.462

2.06

29.2

0.717

2.04

0.525

9.91

0.158

0.693

0.272

0.7

0.675

4.16

0.0743

0.291

4.25

0.138

0.297

0.825

0.0535

0.14

1.77

0.085

0.124

0.975

0.925

0.0285

0.0647

0.826

0.0489

0.0578

1.125

0.491

0.018

0.0343

0.462

0.0328

0.0324

1.275

0.259

0.0113

0.0182

0.23

0.0203

0.0161

1.425

0.127

0.0071

0.00887

0.096

0.0119

0.00672

1.575

0.0739

0.00506

0.00517

0.065

0.00941

0.00455

1.725

0.0307

0.00307

0.00215

0.0181

0.00472

0.00127

1.875

0.0206

0.00239

0.00144

2.025

0.0133

0.00184

0.000933

2.175

0.0024

0.000744

0.000168

2.325

0.00312

0.000847

0.000218

Data for the 0-85% minimum bias centrality bin: the 12% (correlated) uncertainty in the normalization has not been included

p_t

(GeV/c)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy

(mean)

(stat)

(sys)

1/(2πN_events) 1/p_t d²N_γ/dp_tdy (r_xy>40 cm)

(mean)

(stat)

(sys)

0.075

936

68.7

65.5

1166

90.84

81.59

0.225

212

3.4

14.8

215

4.77

15.1

0.375

67.5

0.813

4.73

66.5

1.24

4.66

0.525

24.3

0.277

1.7

23.9

0.455

1.67

0.675

10.7

0.126

0.749

10.4

0.218

0.73

0.825

5.19

0.0964

0.363

4.62

0.149

0.323

0.975

2.54

0.0501

0.178

2.31

0.0836

0.162

1.125

1.28

0.0282

0.0897

1.23

0.051

0.0858

1.275

0.668

0.0167

0.0468

0.565

0.0283

0.0395

1.425

0.353

0.0105

0.0247

0.296

0.018

0.0207

1.575

0.204

0.00718

0.0143

0.184

0.0136

0.0128

1.725

0.111

0.0049

0.0078

0.127

0.0106

0.00886

1.875

0.0596

0.0033

0.00417

2.025

0.0396

0.00257

0.00277

2.175

0.0222

0.00184

0.00155

2.325

0.0135

0.00142

0.000943

Data for the 0-11% most central collisions: the 12% (correlated) uncertainty in the normalization has not been included

dN_γ/dy

(mean)

(stat)

dN_γ/dy (r_xy>40 cm)

(mean)

(stat)

-0.45

523

28.6

522

37.7

-0.35

507

28.2

470

31.1

-0.25

580

37.8

602

55.4

-0.15

524

30.2

544

44.8

-0.05

511

30.4

486

37.9

0.05

529

33.7

567

55.8

0.15

499

27.5

493

34.8

0.25

549

35.2

552

46.6

0.35

558

34.9

664

65.4

0.45

518

29.1

515

36.6

Data for the 11-34% centrality bin: the 12% (correlated) uncertainty in the normalization has not been included

dN_γ/dy

(mean)

(stat)

dN_γ/dy (r_xy>40 cm)

(mean)

(stat)

-0.45

258

21.1

311

41.1

-0.35

280

25.2

298

36.9

-0.25

311

347

59.8

-0.15

267

23.7

281

35.6

-0.05

310

34.9

299

39.9

0.05

250

22.2

255

28.8

0.15

293

28.7

316

45.2

0.25

294

30.8

262

30.4

0.35

279

25.1

293

36.1

0.45

287

28.6

287

34.7

Data for the 34-85% centrality bin: the 12% (correlated) uncertainty in the normalization has not been included

dN_γ/dy

(mean)

(stat)

dN_γ/dy (r_xy>40 cm)

(mean)

(stat)

-0.45

64.7

2.93

64.6

3.92

-0.35

65.6

3.16

67.3

4.35

-0.25

62.7

2.82

68.2

4.3

-0.15

61.5

2.81

67.2

4.34

-0.05

63.2

2.99

68.9

4.67

0.05

68.9

3.7

74.9

5.71

0.15

3.33

74.1

5.47

0.25

65.4

3.24

74.3

5.53

0.35

65.7

3.19

71.2

4.8

0.45

63.3

2.98

68.8

4.58

Data for the 0-85% minimum bias centrality bin: the 12% (correlated) uncertainty in the normalization has not been included

dN_γ/dy

(mean)

(stat)

dN_γ/dy (r_xy>40 cm)

(mean)

(stat)

-0.45

147

5.19

152

7.42

-0.35

151

5.72

152

7.73

-0.25

147

5.43

156

8.22

-0.15

143

5.28

153

8.17

-0.05

150

6.03

158

8.9

0.05

152

6.49

157

9.1

0.15

151

6.13

163

9.72

0.25

149

155

8.77

0.35

148

5.51

153

7.91

0.45

149

5.75

158

8.41

Fig. 8: Data for the two-photon invariant mass plots

M_γγ

(GeV/c²)

top plot: background distribution

(counts a.u)

(stat)

middle plot: signal distribution

(counts a.u)

(stat)

bottom plot: signal-background distribution

(counts a.u)

(stat)

0.0525

2201

46.91

1994

44.65

24.4

44.7

0.0595

2411

49.1

2186

46.75

-27.7

46.8

0.0665

2578

50.77

2480

49.8

28.3

49.8

0.0735

2871

53.58

2722

52.17

38.5

52.2

0.0805

3143

56.06

2892

53.78

-17.1

53.8

0.0875

3382

58.15

3112

55.79

-16.6

55.8

0.0945

3646

60.38

3359

57.96

0.1015

3780

61.48

3523

59.35

-26.2

59.4

0.1085

4091

63.96

3769

61.39

18.7

61.4

0.1155

4246

65.16

4011

63.33

65.7

63.3

0.1225

4495

67.04

4337

65.86

203

65.9

0.1295

4656

68.23

4584

67.71

267

67.7

0.1365

4855

69.68

4794

69.24

301

69.2

0.1435

5109

71.48

4690

68.48

26.4

68.5

0.1505

5248

72.44

4898

69.99

70.2

0.1575

5308

72.86

4864

69.74

-122

69.7

0.1645

5418

73.61

5156

71.81

18.1

71.8

0.1715

5646

75.14

5175

71.94

-109

71.9

0.1785

5886

76.72

5362

73.23

-61.3

73.2

0.1855

5947

77.12

5557

74.55

0.152

74.5

0.1925

5931

77.01

5727

75.68

42.8

75.7

0.1995

6298

79.36

5802

76.17

-3.46

76.2

0.2065

6146

78.4

5917

76.92

-3.55

76.9

0.2135

6511

80.69

6066

77.88

36.5

77.9

0.2205

6656

81.58

6092

78.05

-40.3

78.1

0.2275

6791

82.41

6258

79.11

79.1

0.2345

6892

83.02

6367

79.79

47.5

79.8

0.2415

6976

83.52

6395

79.97

-8.86

0.2485

6956

83.4

6539

80.86

56.9

80.9

Fig. 9: π⁰ transverse momentum spectra

Data for the 0-11% most central collisions: the 49% uncertainty in the normalization has not been included

Parameters of the Boltzmann Function 315e^{-sqrt(p_t²c²+m_π⁰²c⁴)/.281}

p_t range (GeV/c)

min

max

1/(2πN_events) 1/p_t d²N_π⁰/dp_tdy

(mean)

(stat)

0.25

0.75

47.5

9.85

0.75

14.5

2.55

1.25

6.02

1.02

1.25

1.5

1.98

0.392

1.5

1.75

1.07

0.196

1.75

0.334

0.102

2.5

0.0917

0.0358

2.5

0.0332

0.0151

Data for the 11-34% centrality bin: the 40% uncertainty in the normalization has not been included

Parameters of the Boltzmann Function 166e^{-sqrt(p_t²c²+m_π⁰²c⁴)/.293}

p_t range (GeV/c)

min

max

1/(2πN_events) 1/p_t d²N_π⁰/dp_tdy

(mean)

(stat)

0.25

0.75

29.8

17.3

0.75

10.4

3.51

1.25

2.11

0.982

1.25

1.5

2.07

0.518

1.5

1.75

0.689

0.217

1.75

0.257

0.103

2.5

0.0713

0.0299

Data for the 34-85% centrality bin: the 40% uncertainty in the normalization has not been included

Parameters of the Boltzmann Function 20.7e^{-sqrt(p_t²c²+m_π⁰²c⁴)/.308}

p_t range (GeV/c)

min

max

1/(2πN_events) 1/p_t d²N_π⁰/dp_tdy

(mean)

(stat)

0.25

0.75

6.64

1.93

0.75

1.31

0.378

1.25

0.585

0.133

1.25

1.5

0.134

0.0513

1.5

1.75

0.0813

0.026

1.75

0.0669

0.0165

2.5

0.021

0.0057

Fig. 10: π⁰ contribution in the photon spectra spectra

Please refer to the figure caption and paper for infomation about what uncertainties are included

p_t

(GeV/c)

(dN_γ)_{π⁰ Contribution}/(dN_γ)Measured

0-11% centrality

(mean)

(stat)

11-34% centrality

(mean)

(stat)

34-85% centrality

(mean)

(stat)

0.525

0.626

0.0458

0.797

0.0607

0.619

0.0455

0.675

0.657

0.0484

0.834

0.0641

0.708

0.0527

0.825

0.675

0.0515

0.884

0.0735

0.738

0.0573

0.975

0.711

0.0549

0.937

0.0788

0.842

0.0673

1.12

0.675

0.0531

1.02

0.0882

0.848

0.0706

1.27

0.625

0.0505

0.913

0.083

0.87

0.0764

1.42

0.654

0.0545

1.02

0.0991

0.991

0.095

1.57

0.633

0.055

0.953

0.0987

0.939

0.0988

1.72

0.533

0.0489

0.89

0.102

1.24

0.161

1.87

0.509

0.0498

1.11

0.147

1.05

0.152

2.02

0.508

0.0542

0.946

0.144

0.946

0.156

2.18

0.481

0.0566

0.711

0.121

2.95

0.96

2.33

0.42

0.0559

0.59

0.114

1.35

0.391

Fig. 4: Data for the electron-positron invariant mass plots

M_e^-_e⁺

(GeV/c²)

left plot: distribution for
full opening angle

(counts a.u)

(stat)

right plot: distribution for
non-bending plane opening angle

(counts a.u)

(stat)

0.001125

0.95

0.00572

2.45

0.00919

0.001375

0.699

0.00491

1.83

0.00794

0.001625

0.555

0.00437

1.42

0.00699

0.001875

0.461

0.00399

1.18

0.00636

0.002125

0.414

0.00378

1.01

0.0059

0.002375

0.368

0.00356

0.885

0.00552

0.002625

0.333

0.00339

0.777

0.00517

0.002875

0.299

0.00321

0.683

0.00485

0.003125

0.282

0.00312

0.612

0.00459

0.003375

0.252

0.00295

0.533

0.00428

0.003625

0.233

0.00283

0.474

0.00404

0.003875

0.213

0.00271

0.418

0.0038

0.004125

0.193

0.00258

0.362

0.00353

0.004375

0.184

0.00252

0.328

0.00336

0.004625

0.164

0.00238

0.277

0.00309

0.004875

0.159

0.00234

0.257

0.00298

0.005125

0.145

0.00223

0.22

0.00275

0.005375

0.136

0.00217

0.195

0.00259

0.005625

0.129

0.00211

0.172

0.00243

0.005875

0.123

0.00206

0.151

0.00228

0.006125

0.116

0.002

0.135

0.00216

0.006375

0.11

0.00195

0.115

0.00199

0.006625

0.111

0.00195

0.103

0.00189

0.006875

0.108

0.00193

0.0887

0.00175

0.007125

0.105

0.0019

0.0807

0.00167

0.007375

0.101

0.00187

0.0712

0.00157

0.007625

0.102

0.00187

0.0629

0.00147

0.007875

0.0959

0.00182

0.0531

0.00135

0.008125

0.102

0.00187

0.0494

0.00131

0.008375

0.0989

0.00185

0.0423

0.00121

0.008625

0.102

0.00188

0.0372

0.00113

0.008875

0.0982

0.00184

0.0319

0.00105

0.009125

0.101

0.00187

0.0297

0.00101

0.009375

0.1

0.00186

0.0266

0.000957

0.009625

0.0995

0.00185

0.0228

0.000886

0.009875

0.101

0.00186

0.0189

0.000807

0.01013

0.103

0.00188

0.017

0.000764

0.01038

0.105

0.0019

0.0146

0.00071

0.01063

0.104

0.00189

0.0118

0.000637

0.01088

0.107

0.00192

0.012

0.000644

0.01112

0.108

0.00193

0.00968

0.000578

0.01137

0.109

0.00194

0.00837

0.000537

0.01162

0.109

0.00193

0.00823

0.000533

0.01188

0.107

0.00192

0.00579

0.000447

0.01213

0.112

0.00196

0.00586

0.000449

0.01238

0.113

0.00198

0.00551

0.000436

0.01263

0.109

0.00194

0.00393

0.000368

0.01288

0.113

0.00197

0.00341

0.000343

0.01313

0.115

0.00199

0.00293

0.000318

0.01337

0.113

0.00198

0.00272

0.000306

0.01362

0.114

0.00198

0.00176

0.000246

0.01388

0.113

0.00198

0.002

0.000262

0.01413

0.109

0.00194

0.00176

0.000246

0.01438

0.112

0.00197

0.00114

0.000198

0.01463

0.112

0.00196

0.000655

0.00015

0.01488

0.112

0.00196

0.000827

0.000169

0.01512

0.114

0.00199

0.000517

0.000133

0.01537

0.11

0.00194

0.000448

0.000124

0.01562

0.115

0.00199

0.000448

0.000124

0.01588

0.112

0.00196

0.000551

0.000138

0.01613

0.111

0.00196

0.000482

0.000129

0.01638

0.109

0.00194

0.000138

6.89e-05

0.01663

0.111

0.00196

0.000207

8.44e-05

0.01688

0.105

0.0019

0.000207

8.44e-05

0.01713

0.105

0.0019

0.000207

8.44e-05

0.01738

0.105

0.00191

0.000207

8.44e-05

0.01763

0.101

0.00187

6.89e-05

4.87e-05

0.01788

0.102

0.00187

0.000172

7.7e-05

0.01813

0.102

0.00187

0.000138

6.89e-05

0.01837

0.103

0.00188

0.000103

5.97e-05

0.01862

0.0986

0.00184

0.000103

5.97e-05

0.01887

0.101

0.00187

6.89e-05

4.87e-05

0.01912

0.0942

0.0018

3.45e-05

0.01937

0.0914

0.00177

3.45e-05

0.01963

0.0931

0.00179

3.45e-05

0.01988

0.0866

0.00173

0.02013

0.0869

0.00173

0.02038

0.0873

0.00173

3.45e-05

0.02063

0.0872

0.00173

0.02088

0.0814

0.00167

0.02113

0.0819

0.00168

0.02138

0.0798

0.00166

0.02163

0.0795

0.00165

0.02188

0.0775

0.00163

0.02212

0.073

0.00159

0.02237

0.0706

0.00156

0.02262

0.0683

0.00153

0.02287

0.0702

0.00156

0.02312

0.0675

0.00152

0.02337

0.0657

0.0015

0.02363

0.0638

0.00148

0.02388

0.0583

0.00142

0.02413

0.06

0.00144

0.02438

0.0581

0.00142

0.02463

0.0577

0.00141

0.02488

0.0553

0.00138

0.02513

0.0546

0.00137

0.02538

0.0535

0.00136

0.02563

0.0505

0.00132

0.02588

0.05

0.00131

0.02613

0.0474

0.00128

0.02637

0.0456

0.00125

0.02662

0.0464

0.00126

0.02687

0.0447

0.00124

0.02712

0.0423

0.00121

0.02738

0.0405

0.00118

0.02763

0.0394

0.00116

0.02788

0.0391

0.00116

0.02813

0.0385

0.00115

0.02838

0.0366

0.00112

0.02863

0.0345

0.00109

0.02888

0.0334

0.00107

0.02913

0.0324

0.00106

0.02938

0.0322

0.00105

0.02963

0.0306

0.00103

0.02988

0.0304

0.00102

0.03012

0.0301

0.00102

0.03037

0.0274

0.000972

0.03062

0.0262

0.00095

0.03087

0.0279

0.000981

0.03112

0.0259

0.000945

0.03138

0.024

0.000909

0.03163

0.024

0.000909

0.03188

0.0221

0.000873

0.03213

0.023

0.00089

0.03238

0.0219

0.00087

0.03263

0.0225

0.00088

0.03288

0.0205

0.00084

0.03313

0.0192

0.000812

0.03338

0.0193

0.000815

0.03363

0.019

0.000809

0.03388

0.0189

0.000807

0.03413

0.0182

0.000792

0.03438

0.0167

0.000759

0.03463

0.0178

0.000784

0.03488

0.0165

0.000754

0.03513

0.0161

0.000744

0.03538

0.0151

0.000722

0.03563

0.0146

0.000709

0.03588

0.0136

0.000686

0.03613

0.014

0.000693

0.03637

0.0127

0.000663

0.03662

0.0137

0.000687

0.03687

0.0128

0.000664

0.03712

0.0114

0.000627

0.03737

0.0115

0.000631

0.03762

0.0115

0.000629

0.03787

0.0112

0.000621

0.03812

0.00982

0.000582

0.03837

0.0092

0.000563

0.03862

0.0092

0.000563

0.03887

0.00937

0.000568

0.03913

0.0091

0.00056

0.03938

0.00879

0.00055

0.03963

0.00937

0.000568

0.03988

0.00861

0.000545

0.04013

0.00751

0.000509

0.04038

0.00751

0.000509

0.04063

0.0073

0.000502

0.04088

0.00679

0.000484

0.04113

0.00679

0.000484

0.04138

0.00579

0.000447

0.04163

0.00603

0.000456

0.04188

0.00606

0.000457

0.04213

0.00572

0.000444

0.04238

0.0051

0.000419

0.04263

0.00482

0.000408

0.04288

0.00417

0.000379

0.04313

0.00541

0.000432

0.04338

0.00393

0.000368

0.04363

0.005

0.000415

0.04388

0.00424

0.000382

0.04412

0.00376

0.00036

0.04437

0.00393

0.000368

0.04462

0.00417

0.000379

0.04487

0.0041

0.000376

0.04512

0.00358

0.000351

0.04537

0.00314

0.000329

0.04562

0.00331

0.000338

0.04587

0.00286

0.000314

0.04612

0.00348

0.000346

0.04637

0.00345

0.000345

0.04662

0.00265

0.000302

0.04688

0.00279

0.00031

0.04713

0.00258

0.000298

0.04738

0.002

0.000262

0.04763

0.00214

0.000271

0.04788

0.00221

0.000276

0.04813

0.00186

0.000253

0.04838

0.00221

0.000276

0.04863

0.00217

0.000273

0.04888

0.00179

0.000248

0.04913

0.00158

0.000234

0.04938

0.00183

0.000251

0.04963

0.00165

0.000239

0.04988

0.00148

0.000226

Fig. 6: Data for the number of reconstructed photon conversions as a function of conversion location plots

left plot: r

(cm)

real data

conversion density (a.u)

(stat)

Geant simulated events

conversion density (a.u)

(stat)

3.5

0.0345

0.00172

0.0341

0.00171

4.5

0.0634

0.00233

0.075

0.00253

5.5

0.0817

0.00264

0.11

0.00306

6.5

0.0941

0.00284

0.136

0.00341

7.5

0.0994

0.00292

0.114

0.00312

8.5

0.101

0.00293

0.103

0.00297

9.5

0.109

0.00305

0.0967

0.00288

10.5

0.11

0.00306

0.113

0.00311

11.5

0.125

0.00327

0.116

0.00315

12.5

0.133

0.00337

0.111

0.00308

13.5

0.146

0.00354

0.105

0.003

14.5

0.158

0.00367

0.108

0.00304

15.5

0.178

0.0039

0.12

0.0032

16.5

0.204

0.00417

0.144

0.00351

17.5

0.24

0.00453

0.154

0.00363

18.5

0.276

0.00485

0.195

0.00409

19.5

0.351

0.00548

0.261

0.00472

20.5

0.407

0.0059

0.316

0.0052

21.5

0.48

0.00641

0.368

0.00561

22.5

0.564

0.00694

0.42

0.00599

23.5

0.662

0.00752

0.497

0.00652

24.5

0.751

0.00801

0.557

0.0069

25.5

0.821

0.00838

0.502

0.00655

26.5

0.91

0.00882

0.593

0.00712

27.5

0.95

0.00901

0.571

0.00699

28.5

0.93

0.00892

0.54

0.00679

29.5

0.885

0.0087

0.511

0.00661

30.5

0.806

0.0083

0.472

0.00636

31.5

0.721

0.00785

0.401

0.00586

32.5

0.653

0.00747

0.328

0.0053

33.5

0.567

0.00697

0.284

0.00493

34.5

0.495

0.0065

0.249

0.00461

35.5

0.439

0.00613

0.228

0.00441

36.5

0.371

0.00563

0.179

0.00391

37.5

0.307

0.00512

0.141

0.00347

38.5

0.248

0.00461

0.108

0.00304

39.5

0.207

0.00421

0.0911

0.00279

40.5

0.181

0.00393

0.1

0.00293

41.5

0.169

0.0038

0.109

0.00305

42.5

0.174

0.00386

0.174

0.00385

43.5

0.227

0.0044

0.265

0.00476

44.5

0.307

0.00513

0.408

0.00591

45.5

0.413

0.00594

0.496

0.00651

46.5

0.471

0.00634

0.47

0.00634

47.5

0.415

0.00596

0.325

0.00528

48.5

0.3

0.00507

0.197

0.0041

49.5

0.191

0.00404

0.128

0.00331

50.5

0.115

0.00313

0.0936

0.00283

51.5

0.0825

0.00266

0.0614

0.00229

52.5

0.064

0.00234

0.0446

0.00195

53.5

0.0547

0.00216

0.0484

0.00203

54.5

0.0498

0.00206

0.0329

0.00168

55.5

0.0402

0.00185

0.0372

0.00178

56.5

0.0392

0.00183

0.0384

0.00181

57.5

0.0417

0.00189

0.0291

0.00158

58.5

0.042

0.00189

0.0372

0.00178

59.5

0.0454

0.00197

0.036

0.00175

60.5

0.0516

0.0021

0.0546

0.00216

61.5

0.0315

0.00164

0.0242

0.00144

62.5

0.0291

0.00158

0.0335

0.00169

63.5

0.0308

0.00162

0.036

0.00175

64.5

0.0384

0.00181

0.0335

0.00169

65.5

0.0373

0.00179

0.0409

0.00187

66.5

0.0263

0.0015

0.0415

0.00188

67.5

0.0276

0.00154

0.026

0.00149

68.5

0.0305

0.00162

0.0329

0.00168

69.5

0.038

0.0018

0.0502

0.00207

70.5

0.0315

0.00164

0.031

0.00163

71.5

0.0289

0.00157

0.0229

0.0014

72.5

0.0286

0.00156

0.0248

0.00146

73.5

0.0302

0.00161

0.0291

0.00158

74.5

0.041

0.00187

0.0521

0.00211

75.5

0.034

0.00171

0.0273

0.00153

76.5

0.0321

0.00166

0.026

0.00149

77.5

0.0323

0.00166

0.0378

0.0018

78.5

0.0302

0.00161

0.036

0.00175

79.5

0.0388

0.00182

0.0453

0.00197

80.5

0.0328

0.00168

0.0335

0.00169

81.5

0.0286

0.00156

0.0316

0.00164

82.5

0.0287

0.00157

0.0366

0.00177

83.5

0.0326

0.00167

0.0285

0.00156

84.5

0.0383

0.00181

0.0384

0.00181

85.5

0.0294

0.00159

0.0322

0.00166

86.5

0.0234

0.00142

0.0366

0.00177

87.5

0.0303

0.00161

0.0298

0.0016

88.5

0.035

0.00173

0.0366

0.00177

89.5

0.0376

0.00179

0.0366

0.00177

90.5

0.0323

0.00166

0.0322

0.00166

91.5

0.0317

0.00165

0.0329

0.00168

92.5

0.0277

0.00154

0.0322

0.00166

93.5

0.0368

0.00177

0.0291

0.00158

94.5

0.036

0.00175

0.0403

0.00186

95.5

0.0335

0.00169

0.0378

0.0018

96.5

0.0339

0.0017

0.0329

0.00168

97.5

0.0326

0.00167

0.0242

0.00144

98.5

0.0403

0.00186

0.0322

0.00166

99.5

0.0415

0.00188

0.0397

0.00184

100.5

0.0345

0.00172

0.0291

0.00158

101.5

0.0328

0.00168

0.0279

0.00154

102.5

0.0322

0.00166

0.0242

0.00144

103.5

0.0364

0.00176

0.0223

0.00138

104.5

0.0389

0.00182

0.0409

0.00187

105.5

0.0331

0.00168

0.0205

0.00132

106.5

0.0351

0.00173

0.018

0.00124

107.5

0.0307

0.00162

0.0211

0.00134

108.5

0.0312

0.00163

0.013

0.00106

109.5

0.0338

0.0017

0.0254

0.00147

110.5

0.0293

0.00158

0.0174

0.00122

111.5

0.0279

0.00154

0.0174

0.00122

112.5

0.0257

0.00148

0.0149

0.00113

113.5

0.0293

0.00158

0.0149

0.00113

114.5

0.0298

0.0016

0.0167

0.0012

115.5

0.0215

0.00135

0.00992

0.000921

116.5

0.0243

0.00144

0.0124

0.00103

117.5

0.0237

0.00142

0.0161

0.00117

118.5

0.0218

0.00137

0.0143

0.0011

119.5

0.0235

0.00142

0.00744

0.000798

120.5

0.024

0.00143

0.0112

0.000977

121.5

0.022

0.00137

0.0093

0.000892

122.5

0.0235

0.00142

0.0161

0.00117

123.5

0.0229

0.0014

0.0149

0.00113

124.5

0.0215

0.00135

0.0124

0.00103

125.5

0.0213

0.00135

0.0112

0.000977

126.5

0.0174

0.00122

0.0112

0.000977

127.5

0.0209

0.00134

0.0161

0.00117

128.5

0.015

0.00113

0.00868

0.000861

129.5

0.0171

0.00121

0.00682

0.000764

130.5

0.0133

0.00106

0.00744

0.000798

131.5

0.0149

0.00113

0.0112

0.000977

132.5

0.0107

0.000956

0.00496

0.000651

133.5

0.0139

0.00109

0.0062

0.000728

134.5

0.0107

0.000956

0.00434

0.000609

135.5

0.0103

0.000937

0.00434

0.000609

136.5

0.00966

0.000909

0.00434

0.000609

137.5

0.0109

0.000964

0.00372

0.000564

138.5

0.0071

0.000779

0.00248

0.00046

139.5

0.00829

0.000842

0.00248

0.00046

140.5

0.00675

0.00076

0.00372

0.000564

141.5

0.0071

0.000779

0.0031

0.000515

142.5

0.00539

0.000679

0.00186

0.000399

143.5

0.00428

0.000605

0.00124

0.000326

144.5

0.00359

0.000554

0.00124

0.000326

145.5

0.00393

0.00058

0.00186

0.000399

146.5

0.00265

0.000476

0.00186

0.000399

147.5

0.00239

0.000452

0.00124

0.000326

148.5

0.00188

0.000401

0.00062

0.00023

149.5

0.00265

0.000476

0.00062

0.00023

right plot: z

(cm)

real data

conversion density (a.u)

(stat)

Geant simulated events

conversion density (a.u)

(stat)

-159.5

0.0118

0.00228

0.00954

0.00205

-158.5

0.0215

0.00307

0.0127

0.00236

-157.5

0.0206

0.00301

0.0223

0.00313

-156.5

0.0268

0.00343

0.0286

0.00354

-155.5

0.0255

0.00334

0.0318

0.00374

-154.5

0.0399

0.00419

0.00954

0.00205

-153.5

0.0399

0.00419

0.035

0.00392

-152.5

0.0439

0.00439

0.035

0.00392

-151.5

0.05

0.00469

0.0541

0.00487

-150.5

0.0636

0.00528

0.0573

0.00501

-149.5

0.0619

0.00521

0.0509

0.00473

-148.5

0.0579

0.00504

0.0668

0.00541

-147.5

0.0645

0.00532

0.0573

0.00501

-146.5

0.075

0.00574

0.0382

0.00409

-145.5

0.079

0.00589

0.0732

0.00567

-144.5

0.0728

0.00565

0.07

0.00554

-143.5

0.0777

0.00584

0.0859

0.00614

-142.5

0.101

0.00667

0.07

0.00554

-141.5

0.102

0.0067

0.0732

0.00567

-140.5

0.113

0.00705

0.0795

0.00591

-139.5

0.108

0.00688

0.0859

0.00614

-138.5

0.115

0.00709

0.111

0.00699

-137.5

0.121

0.00729

0.105

0.00679

-136.5

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Photon and neutral pion production in Au+Au collisions at sqrt(sNN) = 130 GeVJ. Adams et al., Phys. Rev. C. 70, 044902 (2004).

Data for Fig. 4 (electron-positron invariant mass plots) and Fig. 6 (number of reconstructed photon conversions as a function of the conversion location) are located at the bottom of the page.

Fig. 5: dE/dx deviant distributions of positive daughters

Fig. 7: Corrected photon spectra

Fig. 8: Data for the two-photon invariant mass plots

Fig. 9: π0 transverse momentum spectra

Fig. 10: π0 contribution in the photon spectra spectra

Fig. 4: Data for the electron-positron invariant mass plots

Fig. 6: Data for the number of reconstructed photon conversions as a function of conversion location plots

Photon and neutral pion production in Au+Au collisions at sqrt(s_NN) = 130 GeV
J. Adams et al., Phys. Rev. C. 70, 044902 (2004).

Fig. 9: π⁰ transverse momentum spectra

Fig. 10: π⁰ contribution in the photon spectra spectra