DPF 2009

Session

QCD I

30 Jul 2009, 14:00

Wayne State University

244. Perturbative QCD for hadron collider physics: progress and applications

Mr Kirill Melnikov (Johns Hopkins University)

30/07/2009, 14:00

Perturbative and Non-perturbative QCD

I will describe recent developments in perturbative QCD focusing on progress in understanding one-loop corrections to multi-jet processes.

420. HERA measurements on proton structure

Dr Alexander Glazov (DESY)

30/07/2009, 14:35

Perturbative and Non-perturbative QCD

Recent results from the H1 and ZEUS experiment at HERA will be presented.

21. Two-loop soft anomalous dimensions with massive and massless quarks

Prof. Nikolaos Kidonakis (Kennesaw State University)

30/07/2009, 15:10

Perturbative and Non-perturbative QCD

I present results for two-loop soft anomalous dimensions, which are derived from dimensionally regularized diagrams with eikonal quark lines and control soft-gluon emission in hard-scattering processes. Detailed results for the UV poles of the eikonal integrals will be shown for massive quarks, and the massless limit will also be taken. The construction of soft anomalous dimensions at...

388. HERWIRI1.0: MC Realization of IR-Improvement for DGLAP-CS Parton Showers

Dr Bennie Ward (Baylor University)

30/07/2009, 15:35

Perturbative and Non-perturbative QCD

In the context of HERWIG6.5, we present Monte Carlo data showing the comparison between the parton shower generated by the standard DGLAP-CS kernels and that generated by the new IR-improved DGLAP-CS kernels recently developed by one of us(BFLW). This is done by implementing the new kernels in HERWIG6.5 to generate a new MC, HERWIRI1.0, for hadron-hadron interactions at high energies. Possible...

27. Detection of Jets and Photons at ATLAS

Yaquan Fang (University of Wisconsin)

30/07/2009, 16:20

Perturbative and Non-perturbative QCD

The large production rate of jets and photons at the LHC will provide an ideal opportunity for testing perturbative QCD, for constraining the gluon parton density function, as well as for searching for new physics. The finely segmented calorimeters, together with an efficient tracking system, allows for precision measurements of photons and jets. In this presentation, the di-jet,...

189. Photons plus Heavy Flavors and Double Parton Interactions in Photon plus Three-jet events in ppbar collisions at sqrt(s)=1.96 TeV in the D0 experiment

Dmitry Bandurin (Kansas State University)

30/07/2009, 16:45

Perturbative and Non-perturbative QCD

A sample of photon plus 3-jet events collected in the D0 experiment with an integrated luminosity of 1fb-1 is used to determine the fraction of the events with double parton (DP) scattering fDP in a single ppbar collision at sqrt(s)=1.96TeV. The events are selected with photon candidate transverse momentum between 60 and 80GeV, leading jet pT above 25GeV and two additional jets with...

184. Measurement of Dijet Angular Distributions and Search for New Physics with the D0 Detector

Dr Don Lincoln (Fermilab)

30/07/2009, 17:10

Perturbative and Non-perturbative QCD

We present the first measurement of dijet angular distributions in Run II of the Fermilab Tevatron Collider. The measurement is based on a dataset, corresponding to an integrated luminosity of approx 0.7 fb-1 taken with the D0 detector. Shapes of dijet angular distributions have been measured over a range of dijet masses, from 0.25 TeV and beyond 1TeV. The data are in good agreement...

187. Measurement of Differential Z/gamma+jet+X Cross Sections with the D0 Detector

Sabine Lammers (Indiana University)

30/07/2009, 17:35

Perturbative and Non-perturbative QCD

We present measurements of differential cross sections in inclusive Z/gamma plus jet production in a data sample of 1fb-1 collected with the D0 detector in proton antiproton collisions at sqrt(s)=1.96TeV. Measured variables include the Z/gamma transverse momentum (pT-Z), and rapidity (y-Z), the leading jet pT (pT-jet), and rapidity (y-jet), as well as various angles of the Z+jet...