QCD@LHC 2015, London

Session

HardQCD+PDFs: Joint session

Sep 2, 2015, 2:10 PM

Queen Mary University of London

Conveners

HardQCD+PDFs: Joint session

• Ringaile Placakyte (Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))
• Jun Gao (Southern Methodist University)
• Lucian Harland-Lang (University College London)
• Joao Pires (Milano Bicocca)
• Evelin Meoni (Tufts University (US))

HardQCD+PDFs: Joint session

• Joao Pires (Milano Bicocca)
• Jun Gao (Southern Methodist University)
• Ringaile Placakyte (Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))
• Lucian Harland-Lang (University College London)
• Evelin Meoni (Tufts University (US))

93. Studies of PDF sensitivity relevant for ATLAS measurements (20+10min)

Remie Hanna (CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))

9/2/15, 2:10 PM

PDFs

Several measurements performed by the ATLAS collaboration are either useful to constrain the proton structure or are affected by its associated uncertainties. The strange-quark density is rather poorly known at low x. Measurements of the W+c production and the inclusive W and Z differential cross sections are found to constrain the strange-quark density. Drell-Yan cross section...

16. Jet measurements, alpha_s and PDF results from CMS (20+10min)

Klaus Rabbertz (KIT - Karlsruhe Institute of Technology (DE))

9/2/15, 2:40 PM

PDFs

Recent results from CMS on jet measurements as well as jet properties and jet variables are presented together with results on alpha_s extraction and PDF constraints.

126. Subleading Logarithms in High Energy Jets (15+5min)

Helen Brooks (IPPP/Durham University)

9/2/15, 3:10 PM

107. Recent developments in the fast reproduction of QCD calculations with the APPLgrid project (15+5min)

Mark Sutton (University of Sussex (GB))

9/2/15, 3:30 PM

PDFs

Recent developments in the fast reproduction of the results of QCD calculations using the APPLgrid project are presented. The calculation of cross-sections at Next-to-Leading order in QCD involves the integration over the final state phase space in order to cancel the infra-red divergences. For the calculation of cross sections for observables at hadron-hadron colliders this integration...

9. fastNLO v2 Developments (15+5min)

Klaus Rabbertz (KIT - Karlsruhe Institute of Technology (DE))

9/2/15, 3:50 PM

Hard QCD

The precise calculation of hadron-hadron collisions at higher orders of perturbative QCD requires a large amount of processing power. In addition, thorough analyses require that these calculations are repeated many times for different parameters. The fastNLO toolkit can be interfaced with next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) Monte-Carlo programs to...

57. Measurements of Drell­-Yan transverse momentum, lepton azimuthal decorrelation and angular distributions with the ATLAS detector (20+10min)

Tai-Hua Lin (Johannes-Gutenberg-Universitaet Mainz (DE))

9/4/15, 2:00 PM

Hard QCD

The ATLAS Collaboration has performed precision measurements of the transverse momentum of Z/gamma* bosons and their decay lepton angular decorrelation with the phi* observable. Measurements have been performed at 7 and 8 TeV in different di­lepton invariant mass and rapidity regions. These measurements are sensitive to soft resummation effects and hard jet emissions for small and large...

72. W/Z results from CMS (20+10min)

Jay Lawhorn (California Institute of Technology (US))

9/4/15, 2:30 PM

PDFs

The production of W and Z bosons is studied in pp collisions at a center-of-mass energy of 8 TeV using data collected in the CMS experiment. W events are selected containing an isolated, energetic electron or muon. Z events are selected containing a pair of isolated, energetic electrons or muons. Data-driven methods are used to estimate reconstruction and triggering efficiencies, and well as...