Article open access publication

Measurement of the ratio of cross sections for inclusive isolated-photon production in pp collisions at s = 13 and 8 TeV with the ATLAS detector

Journal of High Energy Physics, Springer Nature, ISSN 1126-6708

Volume 2019, 4, 2019

DOI:10.1007/jhep04(2019)093, Dimensions: pub.1113461540,

Authors

Affiliations

Organisations

  1. (1) Mohamed I University, grid.410890.4
  2. (2) Center for Particle Physics of Marseilles, grid.470046.1
  3. (3) University of Oklahoma, grid.266900.b
  4. (4) University of Massachusetts Amherst, grid.266683.f
  5. (5) Institute of Physics, grid.435347.2
  6. (6) Royal Holloway University of London, grid.4970.a
  7. (7) University of Toronto, grid.17063.33
  8. (8) University of Copenhagen, grid.5254.6, KU
  9. (9) University of Sussex, grid.12082.39
  10. (10) Tel Aviv University, grid.12136.37
  11. (11) Technion – Israel Institute of Technology, grid.6451.6
  12. (12) Argonne National Laboratory, grid.187073.a
  13. (13) King's College London, grid.13097.3c
  14. (14) International Centre for Theoretical Physics, grid.419330.c
  15. (15) INFN Sezione di Trieste, grid.470223.0
  16. (16) University of Tokyo, grid.26999.3d
  17. (17) Johannes Gutenberg University of Mainz, grid.5802.f
  18. (18) AGH University of Science and Technology, grid.9922.0
  19. (19) Northern Illinois University, grid.261128.e
  20. (20) Ludwig Maximilian University of Munich, grid.5252.0
  21. (21) Istanbul University, grid.9601.e
  22. (22) Boğaziçi University, grid.11220.30
  23. (23) Rutherford Appleton Laboratory, grid.76978.37
  24. (24) University of California, Santa Cruz, grid.205975.c
  25. (25) Laboratoire de l'Accélérateur Linéaire, grid.462450.1
  26. (26) University of Clermont Auvergne, grid.494717.8
  27. (27) Radboud University Nijmegen, grid.5590.9
  28. (28) Alexandru Ioan Cuza University, grid.8168.7
  29. (29) Institute for Theoretical Physics, grid.501798.2
  30. (30) University of Granada, grid.4489.1
  31. (31) Laboratory of Instrumentation and Experimental Particles Physics, grid.420929.4
  32. (32) Joint Institute for Nuclear Research, grid.33762.33
  33. (33) INFN Sezione di Roma II, grid.470219.9
  34. (34) University of Rome Tor Vergata, grid.6530.0
  35. (35) Kyoto University, grid.258799.8
  36. (36) Lund University, grid.4514.4
  37. (37) University of Geneva, grid.8591.5
  38. (38) P.N. Lebedev Physical Institute of the Russian Academy of Sciences, grid.425806.d
  39. (39) INFN Sezione di Bologna, grid.470193.8
  40. (40) University of Victoria, grid.143640.4
  41. (41) Instituto de Física La Plata, grid.450288.3
  42. (42) European Organization for Nuclear Research, grid.9132.9
  43. (43) Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, grid.443874.8
  44. (44) Humboldt University of Berlin, grid.7468.d
  45. (45) National Technical University of Athens, grid.4241.3
  46. (46) Czech Technical University in Prague, grid.6652.7
  47. (47) INFN Sezione di Milano, grid.470206.7
  48. (48) University of Chicago, grid.170205.1
  49. (49) University of Washington, grid.34477.33
  50. (50) University of Oregon, grid.170202.6
  51. (51) University of Birmingham, grid.6572.6
  52. (52) INFN Sezione di Napoli, grid.470211.1
  53. (53) University of Naples Federico II, grid.4691.a
  54. (54) University of Glasgow, grid.8756.c
  55. (55) Autonomous University of Madrid, grid.5515.4
  56. (56) Institute for Corpuscular Physics, grid.470047.0
  57. (57) Federal University of Rio de Janeiro, grid.8536.8
  58. (58) McGill University, grid.14709.3b
  59. (59) University of Oxford, grid.4991.5
  60. (60) Brandeis University, grid.253264.4
  61. (61) University of Michigan, grid.214458.e
  62. (62) University of Coimbra, grid.8051.c
  63. (63) DESY, grid.7683.a
  64. (64) Iowa State University, grid.34421.30
  65. (65) University of Sheffield, grid.11835.3e
  66. (66) Institut de Recherche sur les Lois Fondamentales de l'Univers, grid.457342.3
  67. (67) The University of Texas at Austin, grid.89336.37
  68. (68) Heidelberg University, grid.7700.0
  69. (69) University of Bern, grid.5734.5
  70. (70) University of Milan, grid.4708.b
  71. (71) National Institute for Subatomic Physics, grid.420012.5
  72. (72) Columbia University, grid.21729.3f
  73. (73) Novosibirsk State University, grid.4605.7
  74. (74) Siberian Branch of the Russian Academy of Sciences, grid.415877.8
  75. (75) INFN Sezione di Pisa, grid.470216.6
  76. (76) National Laboratory of Frascati, grid.463190.9
  77. (77) University of California, Irvine, grid.266093.8
  78. (78) INFN Sezione di Roma I, grid.470218.8
  79. (79) High Energy Accelerator Research Organization, grid.410794.f
  80. (80) Michigan State University, grid.17088.36
  81. (81) Duke University, grid.26009.3d
  82. (82) University of Montreal, grid.14848.31
  83. (83) University of Iowa, grid.214572.7
  84. (84) Queen Mary University of London, grid.4868.2
  85. (85) Institute for Theoretical and Experimental Physics, grid.21626.31
  86. (86) Harvard University, grid.38142.3c
  87. (87) Uppsala University, grid.8993.b
  88. (88) Brookhaven National Laboratory, grid.202665.5
  89. (89) Comenius University, grid.7634.6
  90. (90) University of Cape Town, grid.7836.a
  91. (91) University of Illinois at Urbana Champaign, grid.35403.31
  92. (92) University of Siegen, grid.5836.8
  93. (93) University of Science and Technology of China, grid.59053.3a
  94. (94) Institute of High Energy Physics, grid.418741.f
  95. (95) York University, grid.21100.32
  96. (96) TRIUMF, grid.232474.4
  97. (97) INFN Sezione di Lecce, grid.470680.d
  98. (98) University of Salento, grid.9906.6
  99. (99) Stockholm University, grid.10548.38
  100. (100) Sapienza University of Rome, grid.7841.a
  101. (101) Institute of Nuclear Physics Polish Academy of Sciences, grid.418860.3
  102. (102) Simon Fraser University, grid.61971.38
  103. (103) Yale University, grid.47100.32
  104. (104) The University of Texas at Arlington, grid.267315.4
  105. (105) University of Sydney, grid.1013.3
  106. (106) Weizmann Institute of Science, grid.13992.30
  107. (107) University of Bonn, grid.10388.32
  108. (108) University of Louisville, grid.266623.5
  109. (109) University of Wisconsin System, grid.28803.31
  110. (110) University of Wuppertal, grid.7787.f
  111. (111) University of Melbourne, grid.1008.9
  112. (112) INFN Sezione di Genova, grid.470205.4
  113. (113) University of Genoa, grid.5606.5
  114. (114) Max Planck Institute for Physics, grid.435824.c
  115. (115) SLAC National Accelerator Laboratory, grid.445003.6
  116. (116) Shanghai Jiao Tong University, grid.16821.3c
  117. (117) Lawrence Berkeley National Laboratory, grid.184769.5
  118. (118) Lancaster University, grid.9835.7
  119. (119) Mohammed V University, grid.31143.34
  120. (120) University of Cambridge, grid.5335.0
  121. (121) California State University, Fresno, grid.253558.c
  122. (122) California State University, California, CA, United States of America
  123. (123) The Ohio State University, grid.261331.4
  124. (124) Laboratoire Physique nucléaire et Hautes Energies, grid.463935.e
  125. (125) Tufts University, grid.429997.8
  126. (126) University of Göttingen, grid.7450.6
  127. (127) University of Fribourg, grid.8534.a
  128. (128) University of Freiburg, grid.5963.9
  129. (129) Gaziantep University, grid.411549.c
  130. (130) Bahçeşehir University, grid.10359.3e
  131. (131) Stony Brook University, grid.36425.36
  132. (132) University of Innsbruck, grid.5771.4
  133. (133) University College London, grid.83440.3b
  134. (134) Carleton University, grid.34428.39
  135. (135) National and Kapodistrian University of Athens, grid.5216.0
  136. (136) Moscow Engineering Physics Institute, grid.183446.c
  137. (137) University of Hassan II Casablanca, grid.412148.a
  138. (138) LAPP, Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, Annecy, France
  139. (139) University of Arizona, grid.134563.6
  140. (140) University of Manchester, grid.5379.8
  141. (141) University of Pittsburgh, grid.21925.3d
  142. (142) University of Pisa, grid.5395.a
  143. (143) INFN Sezione di Roma III, grid.470220.3
  144. (144) TU Dresden, grid.4488.0
  145. (145) Boston University, grid.189504.1
  146. (146) Pontifical Catholic University of Chile, grid.7870.8
  147. (147) Lomonosov Moscow State University, grid.14476.30
  148. (148) University of Liverpool, grid.10025.36
  149. (149) Institute for High Energy Physics, grid.424823.b
  150. (150) Institut de Física d'Altes Energies (IFAE), Barcelona Institute of Science and Technology, Barcelona, Spain
  151. (151) University of Buenos Aires, grid.7345.5
  152. (152) University of Johannesburg, grid.412988.e
  153. (153) Tokyo Metropolitan University, grid.265074.2
  154. (154) Federico Santa María Technical University, grid.12148.3e
  155. (155) Institute of Experimental Physics, grid.435184.f
  156. (156) University of Bergen, grid.7914.b
  157. (157) University of Oslo, grid.5510.1
  158. (158) Oklahoma State University, grid.65519.3e
  159. (159) TU Dortmund University, grid.5675.1
  160. (160) Institute of Physics, Academia Sinica, grid.482252.b
  161. (161) University at Albany, State University of New York, grid.265850.c
  162. (162) Ankara University, grid.7256.6
  163. (163) Indiana University Bloomington, grid.411377.7
  164. (164) University of Calabria, grid.7778.f
  165. (165) Charles University, grid.4491.8
  166. (166) Autonomous University of Barcelona, grid.7080.f
  167. (167) University of Minho, grid.10328.38
  168. (168) Istanbul Bilgi University, grid.24956.3c
  169. (169) Universidade Federal de Juiz de Fora, grid.411198.4
  170. (170) Tbilisi State University, grid.26193.3f
  171. (171) Tomsk State University, grid.77602.34
  172. (172) Moscow Institute of Physics and Technology, grid.18763.3b
  173. (173) University of Pennsylvania, grid.25879.31
  174. (174) Nanjing University, grid.41156.37
  175. (175) Collaborative Innovation Center of Quantum Matter, grid.495569.2
  176. (176) Tsinghua University, grid.12527.33
  177. (177) Kobe University, grid.31432.37
  178. (178) Chinese University of Hong Kong, grid.10784.3a
  179. (179) University of Chinese Academy of Sciences, grid.410726.6
  180. (180) National Tsing Hua University, grid.38348.34
  181. (181) Aristotle University of Thessaloniki, grid.4793.9
  182. (182) Institute of Physics, grid.424881.3
  183. (183) Palacký University, Olomouc, grid.10979.36
  184. (184) University of Ljubljana, grid.8954.0
  185. (185) University of Edinburgh, grid.4305.2
  186. (186) University of Udine, grid.5390.f
  187. (187) Laboratory of Subatomic Physics and Cosmology, grid.472561.3
  188. (188) University of Lisbon, grid.9983.b
  189. (189) Parthenope University of Naples, grid.17682.3a
  190. (190) University of British Columbia, grid.17091.3e
  191. (191) Institute of Particle Physics, grid.421197.8
  192. (192) New York University, grid.137628.9
  193. (193) Shandong University, grid.27255.37
  194. (194) Southern Methodist University, grid.263864.d
  195. (195) Roma Tre University, grid.8509.4
  196. (196) Federal University of São João del-Rei, grid.428481.3
  197. (197) University of Sao Paulo, grid.11899.38
  198. (198) University of Giessen, grid.8664.c
  199. (199) University of Adelaide, grid.1010.0
  200. (200) Cadi Ayyad University, grid.411840.8
  201. (201) University of Warwick, grid.7372.1
  202. (202) Petersburg Nuclear Physics Institute, grid.430219.d
  203. (203) National Centre of Scientific Research Demokritos, grid.6083.d
  204. (204) University of Pavia, grid.8982.b
  205. (205) INFN Sezione di Pavia, grid.470213.3
  206. (206) Peter the Great St. Petersburg Polytechnic University, grid.32495.39
  207. (207) Borough of Manhattan Community College, grid.253205.3
  208. (208) INFN-TIFPA, Trento, Italy
  209. (209) University of Trento, grid.11696.39
  210. (210) Nagasaki Institute of Applied Science, grid.444367.6
  211. (211) University of Alberta, grid.17089.37
  212. (212) University of the Aegean, grid.7144.6
  213. (213) Centre for High Performance Computing, CSIR Campus, Rosebank, Cape Town, South Africa
  214. (214) West University of Timişoara, grid.14004.31
  215. (215) Department of Physics, California State University, East Bay, United States of America
  216. (216) Catalan Institution for Research and Advanced Studies, grid.425902.8
  217. (217) University of New Mexico, grid.266832.b
  218. (218) University of Tsukuba, grid.20515.33
  219. (219) University of Würzburg, grid.8379.5
  220. (220) Osaka University, grid.136593.b
  221. (221) BI Stepanov Institute of Physics, grid.426545.4
  222. (222) Shinshu University, grid.263518.b
  223. (223) University of the Witwatersrand, grid.11951.3d
  224. (224) Nagoya University, grid.27476.30
  225. (225) Belarusian State University, grid.17678.3f
  226. (226) Tokyo Institute of Technology, grid.32197.3e
  227. (227) The University of Texas at Dallas, grid.267323.1
  228. (228) Ilia State University, grid.428923.6
  229. (229) Stanford University, grid.168010.e
  230. (230) Waseda University, grid.5290.e
  231. (231) Tsung-Dao Lee Institute, Shanghai, China
  232. (232) Kyushu University, grid.177174.3
  233. (233) Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
  234. (234) Manhattan College, grid.259586.5
  235. (235) University of Belgrade, grid.7149.b
  236. (236) Istanbul Aydın University, grid.449300.a
  237. (237) Hellenic Open University, grid.55939.33
  238. (238) Hong Kong University of Science and Technology, grid.24515.37
  239. (239) City College of New York, grid.254250.4
  240. (240) University of Hong Kong, grid.194645.b
  241. (241) Universidad Antonio Nariño, grid.440783.c
  242. (242) Royal Institute of Technology, grid.5037.1
  243. (243) Alikhanyan National Laboratory, grid.48507.3e
  244. (244) California State University, Sacramento, grid.253564.3
  245. (245) Hiroshima Institute of Technology, grid.417545.6
  246. (246) Okayama University, grid.261356.5
  247. (247) Jagiellonian University, grid.5522.0
  248. (248) National Institute for Research and Development of Isotopic and Molecular Technologies, grid.435410.7
  249. (249) Institut National de Physique Nucléaire et de Physique des Particules, grid.433124.3
  250. (250) Louisiana Tech University, grid.259237.8
  251. (251) Sun Yat-sen University, grid.12981.33
  252. (252) Institute for Nuclear Research and Nuclear Energy, grid.425050.6
  253. (253) University of Sharjah, grid.412789.1
  254. (254) TOBB University of Economics and Technology, grid.412749.d
  255. (255) University of Hamburg, grid.9026.d
  256. (256) Kyoto University of Education, grid.411219.e
  257. (257) Institute for Particle and Nuclear Physics, grid.481809.c
  258. (258) Transylvania University of Brașov, grid.5120.6
  259. (259) Giresun University, grid.411709.a

Description

The ratio of the cross sections for inclusive isolated-photon production in pp collisions at centre-of-mass energies of 13 and 8 TeV is measured using the ATLAS detector at the LHC. The integrated luminosities of the 13 TeV and 8 TeV datasets are 3.2 fb−1 and 20.2 fb−1, respectively. The ratio is measured as a function of the photon transverse energy in different regions of the photon pseudorapidity. The predictions from next-to-leading-order perturbative QCD calculations are compared with the measured ratio. The experimental systematic uncertainties as well as the uncertainties affecting the predictions are evaluated taking into account the correlations between the two centre-of-mass energies, resulting in a reduction of up to a factor of 2.5 (5) in the experimental (theoretical) systematic uncertainties. The predictions based on several parameterisations of the proton parton distribution functions agree with the data within the reduced experimental and theoretical uncertainties. In addition, this ratio to that of the fiducial cross sections for Z boson production at 13 and 8 TeV using the decay channels Z → e+e− and Z → μ+μ− is made and compared with the theoretical predictions. In this double ratio, a further reduction of the experimental uncertainty is obtained because the uncertainties arising from the luminosity measurement cancel out. The predictions describe the measurements of the double ratio within the theoretical and experimental uncertainties.

Research Categories

Main Subject Area

Fields of Research

Links & Metrics

NORA University Profiles

University of Copenhagen

Dimensions Citation Indicators

Times Cited: 1

Open Access Info

Pure Gold