10 - H1 - Desy

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8.9 The exclusive photon plus jet total cross sections obtained with five different unfoldings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 8.10 The E γ T -ηγ distribution of the original MC set I and a MC reweighted with the f toy E T ,η function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 8.11 The discriminator fit performed in bins of E γ T and ηγ for one of the toy Monte Carlos. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 8.12 The E γ T and ηγ distribution of the toy Mc compared to the results obtained with the unfolding and fitting procedures. . . . . . . . . . . . . . . 121 8.13 Proton - antiproton collision without and with multiparton interaction. . 122 8.14 Multi parton interaction correction ftheor MPI , together with its uncertainty as determined for all the final cross sections. . . . . . . . . . . . . . . . . 124 8.15 Isolation correction ftheor isol as determined for all the final cross sections. . . 125 8.16 Hadronisation correction for all the final cross sections. . . . . . . . . . . 126 8.17 Parton density function uncertainty for all the final cross sections. . . . . 128 9.1 The differential inclusive prompt photon cross sections in bins of E γ T and η γ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 9.2 The double differential inclusive prompt photon cross sections in bins of E γ T and ηγ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 9.3 The differential exclusive prompt photon + jet cross sections in bins of E γ T , ηγ , E jet T and ηjet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 9.4 The differential exclusive prompt photon + jet cross sections in bins of x LO γ and x LO p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 9.5 The differential prompt photon + jet cross sections in bins of ∆Φ and p ⊥ in the direct enhanced phase space and in the resolved enhanced phase space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 9.6 The NLO correction to the FGH calculation and box diagram cotribution. 137 9.7 The measured cross sections in bins of p ⊥ and ∆Φ in the direct and resolved enhanced phase space. . . . . . . . . . . . . . . . . . . . . . . . . 138 9.8 The cross section in bins of p ⊥ and ∆Φ in the direct enhanced phase space compared to the PYTHIA MC prediction produced with variable 〈k T 〉 value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 9.9 The cross section in bins of p ⊥ (a) and ∆Φ (b) in the direct enhanced phase space compared to the FGH NLO calculation with different corrections for the intrinsic transverse momentum effects. The shaded area indicate the error associated to the original calculation. . . . . . . . . . . 140 9.10 The differential cross sections in bins of E γ T in the H1 published phase space (a) and in bins of η γ in the ZEUS published phase space. Both results are compared to the published ones (drawn with open points). . . 142 1 The signal efficiency versus background rejection graph for all studied classifiers in the first MVA E T bin and the CB1 wheel. . . . . . . . . . . 152
List of Tables 169 List of Tables 1.1 The properties of the fundamental fermions (quarks and leptons, spin = 1/2) of the SM [1, 2]. The anti-particle partners of these fermions (not included in the table) have the same mass (M), but opposite electric charge (Q). Q is given in units of the proton charge. . . . . . . . . . . . . 2 1.2 The fundamental forces and force carriers, i.e gauge bosons [1]. Three kinds of fundamental forces are combined in the SM. The fourth fundamental interaction, gravity, is shown separately as it is not yet included in SM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Summary of the experiments whose results are presented in figure 1.20. The last column indicates the starting year of the given experiment. . . . 25 1.4 The inclusive and exclusive prompt photon phase space definitions. . . . 28 1.5 The direct and resolved enhanced prompt photon phase space definitions. 28 2.1 Processes included in the PYTHIA signal MC generation. . . . . . . . . . 33 2.2 Processes included in the PYTHIA radiated signal and background MC generation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2.3 Summary of direct (dir.), resolved (res.), radiated direct (drad.) and radiated resolved (rrad.) signal MC samples. . . . . . . . . . . . . . . . . 35 2.4 Summary of direct (dir.) and resolved (res.) background MC samples. . . 36 2.5 Summary of single particle MC samples. . . . . . . . . . . . . . . . . . . 36 4.1 Summary of the data periods used in this analysis. . . . . . . . . . . . . . 52 4.2 Subtriggers definitions used for monitoring s67 trigger efficiency. . . . . . 57 4.3 Trigger efficiency for 2006 running period for chosen energies. For each LAr calorimeter wheel the value is given for s67 condition (L1) and s67 && L4 HS ET CLUST (L4). . . . . . . . . . . . . . . . . . . . . . . . . . 61 4.4 Definitions of ten topological non-ep background finders considered as “safe“. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 5.1 Prompt photon selection summary. . . . . . . . . . . . . . . . . . . . . . 72 6.1 Correlation coefficients between six shower shape variables calculated for signal (top right) and background (bottom left) MC samples. . . . . . . . 78 6.2 Number of signal and background events used for MVA. . . . . . . . . . . 81 7.1 Stretching factors k and they uncertainties as determined for six cluster shapes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
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PROMPT PHOTON PRODUCTION IN PHOTOPR
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Abstract This thesis presents measu
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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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Page 136 and 137: 120 Cross section building 8.6.2 To
Page 138 and 139: 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: List of Figures 167 6.2 Shower shap
Page 187 and 188: List of Tables 171 C-8b Corrections
Page 189 and 190: References [1] C. Amsler et al.,
Page 191 and 192: References 175 [32] R. Nisius, “T
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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10 - H1 - Desy

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