Measurement of the inclusive isolated prompt photon cross section in pp collisions at root s=8 TeV with the ATLAS detector


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Aad G., Abbott B., Abdallah J., Abdinov O., Abeloos B., Aben R., ...Daha Fazla

JOURNAL OF HIGH ENERGY PHYSICS, cilt.2016, sa.8, ss.1-42, 2016 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2016 Sayı: 8
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1007/jhep08(2016)005
  • Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1-42
  • Anahtar Kelimeler: Hadron-Hadron scattering (experiments), Photon production, proton-proton scattering, PARTON DISTRIBUTIONS, P(P)OVER-BAR COLLISIONS, FRAGMENTATION, SCATTERING, PROTON, LHC
  • Gazi Üniversitesi Adresli: Hayır

Özet

A measurement of the cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy of root s = 8 TeV is presented. The measurement covers the pseudorapidity ranges vertical bar eta(gamma)vertical bar < 1.37 and 1.56 aecurrency sign vertical bar eta(gamma)vertical bar < 2.37 in the transverse energy range 25 < E-T(gamma) < 1500 GeV. The results are based on an integrated luminosity of 20.2 fb(-1), recorded by the ATLAS detector at the LHC. Photon candidates are identified by combining information from the calorimeters and the inner tracker. The background is subtracted using a data-driven technique, based on the observed calorimeter shower-shape variables and the deposition of hadronic energy in a narrow cone around the photon candidate. The measured cross sections are compared with leading-order and next-to-leading order perturbative QCD calculations and are found to be in a good agreement over ten orders of magnitude.