Precision direct photon spectra at high energy and comparison to the 8 TeV ATLAS data

Abstract

The direct photon spectrum is computed to the highest currently available precision and compared to ATLAS data from 8 TeV collisions at the LHC. The prediction includes threshold resummation at next-to-next-to-next-to-leading logarithmic order through the program PeTeR, matched to next-to-leading fixed order with fragmentation effects using JetPhox and includes the resummation of leading-logarithmic electroweak Sudakov effects. Remarkably, improved agreement with data can be seen when each component of the calculation is added successively. This comparison demonstrates the importance of both threshold logs and electroweak Sudakov effects. Numerical values for the predictions are included.

18 pages, 22 plots, 4 tables

References in corpus (3)

• Z-boson production in association with a jet at next-to-next-to-leading order in perturbative QCD
• Dynamical Threshold Enhancement and Resummation in Drell-Yan Production
• The gluon jet function at two-loop order

Cited by in corpus (11)

• The Structure of the Proton in the LHC Precision Era
• Direct photon production at next-to-next-to-leading order
• Next-to-leading power threshold effects for resummed prompt photon production
• Measurement of the inclusive isolated-photon cross section in $pp$ collisions at $\sqrt{s}=13$ TeV using 36 fb${}^{-1}$ of ATLAS data
• Sudakov Shoulder Resummation for Thrust and Heavy Jet Mass
• Study of isolated prompt photon production in $p$-Pb collisions for the ALICE kinematics
• Probing nuclear modifications of parton distribution functions through the isolated prompt photon production at the LHC
• Predictions for the isolated prompt photon production at the LHC at $\sqrt{s}=$13 TeV
• An energy independent scaling of transverse momentum spectra of direct (prompt) photons from two-body processes in high-energy proton-proton collisions
• Three-loop soft function for energetic electroweak boson production at hadron colliders
• The P-P(P) cross-section of isolated single-photon production in the $k_t$-factorization and different angular ordering unintegrated parton distributions frameworks