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174 References [15] V. N. Gribov and L. N. Lipatov, “e+ e- pair annihilation and deep inelastic e p scattering in perturbation theory,” Sov. J. Nucl. Phys., vol. 15, pp. 675–684, 1972. [16] L. N. Lipatov, “The parton model and perturbation theory,” Sov. J. Nucl. Phys., vol. 20, pp. 94–102, 1975. [17] G. Altarelli and G. Parisi, “Asymptotic freedom in parton language,” Nucl. Phys., vol. B126, p. 298, 1977. [18] Y. L. Dokshitzer, “Calculation of the structure functions for deep inelastic scattering and e+ e- annihilation by perturbation theory in quantum chromodynamics,” Sov. Phys. JETP, vol. 46, pp. 641–653, 1977. [19] E. A. Kuraev, L. N. Lipatov, and V. S. Fadin, “The pomeranchuk singularity in nonabelian gauge theories,” Sov. Phys. JETP, vol. 45, pp. 199–204, 1977. [20] I. I. Balitsky and L. N. Lipatov, “The pomeranchuk singularity in quantum chromodynamics,” Sov. J. Nucl. Phys., vol. 28, pp. 822–829, 1978. [21] S. Catani, M. Ciafaloni, and F. Hautmann, “High-energy factorization and small x heavy flavor production,” Nucl. Phys., vol. B366, pp. 135–188, 1991. [22] M. Ciafaloni, “Coherence Effects in Initial Jets at Small q**2 / s,” Nucl. Phys., vol. B296, p. 49, 1988. [23] S. Catani, F. Fiorani, and G. Marchesini, “QCD Coherence in Initial State Radiation,” Phys. Lett., vol. B234, p. 339, 1990. [24] F. D. Aaron et al., “A Precision Measurement of the Inclusive ep Scattering Cross Section at HERA,” 2009, 0904.3513. [25] C. Adloff et al., “Measurement and QCD analysis of neutral and charged current cross sections at HERA,” Eur. Phys. J., vol. C30, pp. 1–32, 2003, hep-ex/0304003. [26] H. L. Lai et al., “Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions,” Eur. Phys. J., vol. C12, pp. 375–392, 2000, hep-ph/9903282. [27] A. D. Martin, R. G. Roberts, W. J. Stirling, and R. S. Thorne, “Physical Gluons and High E(T) jets,” Phys. Lett., vol. B604, pp. 61–68, 2004, hep-ph/0410230. [28] C. F. von Weizsacker, “Radiation emitted in collisions of very fast electrons,” Z. Phys., vol. 88, pp. 612–625, 1934. [29] E. J. Williams, “Nature of the high-energy particles of penetrating radiation and status of ionization and radiation formulae,” Phys. Rev., vol. 45, pp. 729–730, 1934. [30] L. Finke, Measurement of charm and beauty dijet cross sections in photoproduction. PhD thesis, Universität Hamburg, 2006. [31] E. Witten, “Anomalous Cross-Section for Photon - Photon Scattering in Gauge Theories,” Nucl. Phys., vol. B120, pp. 189–202, 1977.
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PROMPT PHOTON PRODUCTION IN PHOTOPR
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Abstract This thesis presents measu
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viii
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x Contents 4 Event reconstruction a
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xii Contents
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xiv Contents the two photon decay c
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xvi Contents
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2 Theoretical framework Gene- Quark
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4 Theoretical framework charged W
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6 Theoretical framework Neutral and
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8 Theoretical framework α s 0.20 H
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10 Theoretical framework 1.2.4.1 DG
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12 Theoretical framework for the em
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14 Theoretical framework F 2 ⋅ 2
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- - 2) 9O9O9 4 - 70 6- - 7 - Q-
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18 Theoretical framework e e e a) b
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20 Theoretical framework than in th
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22 Theoretical framework ZEUS dσ/E
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24 Theoretical framework claim thou
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26 Theoretical framework Figure 1.2
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28 Theoretical framework Inclusive
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30 Theoretical predictions partons
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32 Theoretical predictions 2.1.2 MC
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34 Theoretical predictions rejectio
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MC set Generator Comments Simulatio
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38 Theoretical predictions contribu
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40 The H1 experiment at HERA Hall N
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42 The H1 experiment at HERA y θ z
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44 The H1 experiment at HERA resolu
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46 The H1 experiment at HERA the el
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48 The H1 experiment at HERA under
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50 The H1 experiment at HERA not be
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52 Event reconstruction and presele
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64 Prompt photon selection the rema
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66 Prompt photon selection ∆η <
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68 Prompt photon selection reconstr
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70 Prompt photon selection Events 5
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72 Prompt photon selection Selectio
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74 Photon signal extraction γ π0
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76 Photon signal extraction Events
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78 Photon signal extraction CB1 CB2
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80 Photon signal extraction Figure
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82 Photon signal extraction n∏ va
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84 Photon signal extraction 〈S〉
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86 Calibration and tuning • Backg
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88 Calibration and tuning χ 2 /NDF
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90 Calibration and tuning energy on
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92 Calibration and tuning D Ej 1.1
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94 Calibration and tuning
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96 Cross section building The corre
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98 Cross section building • L-cur
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100 Cross section building (Reconst
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102 Cross section building 8.2.1.1
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104 Cross section building Figure 8
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106 Cross section building section
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108 Cross section building the Pull
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110 Cross section building contribu
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112 Cross section building 8.3.2 Sy
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114 Cross section building 8.4 Cros
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116 Cross section building 8.4.3 Cr
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118 Cross section building The doub
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120 Cross section building 8.6.2 To
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122 Cross section building one outp
Page 140 and 141: 124 Cross section building MPI f th
Page 142 and 143: f f f f f f f f f f f f 126 Cross s
Page 144 and 145: 128 Cross section building PDF unce
Page 146 and 147: 130 Results description of the shap
Page 148 and 149: 132 Results 9.2 Prompt photon + jet
Page 150 and 151: 134 Results [pb] LO dσ / dx γ 100
Page 152 and 153: 136 Results 9.3 NLO corrections The
Page 154 and 155: 138 Results [pb/GeV] dσ / dp 15 10
Page 156 and 157: 140 Results transverse momentum imb
Page 158 and 159: 142 Results [pb/GeV] γ dσ / E T 2
Page 160 and 161: 144 Conclusions and outlook is cons
Page 163 and 164: A Analysis Binning 147 A Analysis B
Page 165 and 166: A Analysis Binning 149 Bin E γ T,O
Page 167 and 168: B Alternative classifier definition
Page 169 and 170: C Cross Section Tables 153 C Cross
Page 171 and 172: C Cross Section Tables 155 η γ E
Page 173 and 174: C Cross Section Tables 157 η γ d
Page 175 and 176: C Cross Section Tables 159 η jet d
Page 177 and 178: C Cross Section Tables 161 x LO γ
Page 179 and 180: C Cross Section Tables 163 x LO γ
Page 181 and 182: List of Figures 1.1 Lowest order Fe
Page 183 and 184: List of Figures 167 6.2 Shower shap
Page 185 and 186: List of Tables 169 List of Tables 1
Page 187 and 188: List of Tables 171 C-8b Corrections
Page 189: References [1] C. Amsler et al.,
Page 193 and 194: References 177 [63] P. A. Aarnio et
Page 195 and 196: References 179 [97] W. Braunschweig
Page 197 and 198: References 181 [129] J. M. Butterwo
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