Abstract
Perturbative QCD calculations at next-to-next-to-leading-order are available for many processes since several years and can be rigorously tested with a large variety of final states. The latest results from the ATLAS Collaboration at the LHC (CERN) involving jets, dijets, photons in association with heavy flavors and vector bosons in association with jets, measured at center of mass energies of √s= 8 and 13 TeV are presented. All measured cross-sections are compared to state-of-the art theory Monte Carlo predictions. The paper concludes with the results of jet-substructure studies at 13 TeV, in particular the measurement of the jet soft-drop mass.
Highlights
Precise measurements of jet cross-sections are crucial in understanding physics at hadron colliders
In quantum chromodynamics (QCD), jets are interpreted as resulting from the fragmentation of quarks and gluons produced in a short-distance scattering process
The ratios of the NLO perturbative quantum chromodynamics (pQCD) predictions to the measured inclusive jet cross-sections as a function of pT in the 6 jet |y| bins are shown in Fig. 2 for the CT14, MMHT2014, NNPDF3.0, HERAPDF2.0, ABMP16 parton distribution function (PDF) sets
Summary
Precise measurements of jet cross-sections are crucial in understanding physics at hadron colliders. Inclusive jet and dijet events represent a background to many other processes at hadron colliders. The production of isolat√ed prompt photons in association with a heavy flavour (HF) jet containing a b or c hadron at s = 8 TeV [5] provides a testing ground for perturbative quantum chromodynamics (pQCD), the content of the proton and the treatment of heavy quarks (HQ) in matrix element (ME) and parton shower (PS) computations. A measurement of the W boson production cross s√ection and the W+/W− cross-section ratio, both in association with jets, in pp collisions at s = 8 TeV are presented in Ref. This pa√per presents measurements of the lisions at s = 13 TeV corresponding to an inclusive jet and dijet cross-sections in integrated luminosity of 3.2 fb−1 [3]. Y* < 0.5 (× 100) 0.5 ≤ y* < 1.0 (× 10-3) 1.0 ≤ y* < 1.5 (× 10-6) 1.5 ≤ y* < 2.0 (× 10-9) 2.0 ≤ y* < 2.5 (× 10-12) 2.5 ≤ y* < 3.0 (× 10-15)
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call