Conveners
QCD
- Gregory Mahlon
Houry Keoshkerian
(Centre National de la Recherche Scientifique (FR))
06/05/2014, 16:30
The ATLAS collaboration has performed studies of a wide range of QCD phenomena, from soft particle to hard photon and jet production. Recent soft-QCD measurements include studies of underlying event, vector meson production. Differential measurements of inclusive and dijet production provide stringent tests of high-order QCD predictions and provide input for determination of parton density...
Zhenyu Han
(University of Oregon)
06/05/2014, 16:45
In this talk, I will introduce the concept of jet radiation radius which quantifies how the jet radiation is distributed around the jet axes. I discuss the color and momentum dependence of the jet radiation radius, and two applications: quark-gluon discrimination and W jet tagging. In both cases, smaller (sub)jet radii are preferred for jets with higher PTs, albeit due to different mechanisms:...
Daniel Duffty
(Illinois Institute of Technology)
06/05/2014, 17:00
When the LHC turns back on, the amount of overlapping events will be significantly higher than anywhere seen to date. This fact, coupled with the higher energy for each event, will lead to an almost uniform spray of energy from underlying events, which will cloud any interesting physics events. In this talk we demonstrate why this is a large issue for physics moving forwards, and a potential...
Alexander Glazov
(Deutsches Elektronen-Synchrotron (DE))
06/05/2014, 17:15
We present the HERAFITTER project which provides a framework for QCD
analyses related to the proton structure in the
context of multi-processes and multi-experiments.
Based on the concept of factorisable nature of the cross sections into
universal parton distribution functions (PDFs) and process dependent
partonic scattering cross sections, HERAFitter allows determination of
PDFs from...
Marco Meissner
(Ruprecht-Karls-Universitaet Heidelberg (DE))
06/05/2014, 17:30
Due to its unique pseudorapidity coverage and the possibility of extending measurements to low transverse momenta LHCb provides important input to the understanding of particle production in a kinematical range where models have large uncertainties. We present charged particle multiplicity measurements, different with respect to transverse momentum and pseudorapidity, as well as strange and...
Maddalena Frosini
(Universita e INFN (IT))
06/05/2014, 17:45
Studies of quarkonia production in the forward region provide important tests of NRQCD. The LHCb experiment has collected a dataset corresponding to an integrated luminosity of about 3/fb in proton-proton collisions at sqrt(s)= 2.76, 7 and 8 TeV. We present studies of the production and polarisation of the J/psi, psi(2S) and chi_c charmonium states as well as those of Upsilon and chi_b...
Benjamin Weinert
(Indiana University (US))
06/05/2014, 18:00
Latest measurements of quarkonium production from the ATLAS experiment in proton-proton collisions are presented. The first measurements of W+prompt J/$\psi$ production are presented, offering unique opportunities for testing quarkonium production models and providing new avenues for study of double parton scattering dynamics. Measurements of the absolute production cross-sections of...
Maddalena Frosini
(Universita e INFN (IT))
06/05/2014, 18:15
The latest years have seen a resurrection of interest in searches for exotic states motivated by tantalising observations by Belle and CDF. Using the data collected at pp collisions at 7 and 8 TeV by the LHCb experiment we present studies of the X(3872)
properties including its decay rate to Psi(2S)gamma, as well as studies of putative states such as the Z(4430)+.
