Aleko Khukhunaishvili
(Cornell University (US))
24/04/2013, 08:30
Structure functions and Parton Densities
Talk in Parallel Session at DIS2013
We present selected measurements done with W and Z bosons performed with the CMS detector, based on samples of events collected during 2011 and 2012 physics runs. Measurements include W and Z inclusive cross sections, the lepton charge asymmetry in W events, and differential cross sections of Z and Drell-Yan production.
Ms
Katalin Nikolics
(Universite de Geneve (CH))
24/04/2013, 08:54
Structure functions and Parton Densities
Talk in Parallel Session at DIS2013
Neutral current Drell Yan cross section is sensitive to the proton parton distribution
functions, in particular to u-bar quark density. The measurements
for two distinct kinematic regions, below the Z boson mass peak and above were performed by the ATLAS collaboration using 7 TeV pp collision data. The results are compared to NNLO QCD predictions corrected for NLO EW effects calculated...
Stefano Carrazza
(CERN)
24/04/2013, 09:18
Structure functions and Parton Densities
Talk in Parallel Session at DIS2013
Electroweak corrections to hadron collider processes become
relevant at the level of precision reached by present-day LHC
experiments. I will provide a brief discussion of the impact of
electroweak corrections to parton distributions, concentrating on QED
corrections to parton evolution equations, and a preliminary
assessment of their impact.
Juan Rojo Chacon
(CERN)
24/04/2013, 09:42
Structure functions and Parton Densities
Talk in Parallel Session at DIS2013
We study at a quantitative level the impact of the uncertainties on the value of the W boson mass measured at hadron colliders due to the proton parton distribution functions (PDFs). The value of the W boson mass is extracted, by means of a template fit technique, from the lepton-pair transverse mass distribution measured in the charged current Drell-Yan process.. We conclude that PDF...
Stephane Tourneur
(Ecole Polytechnique Federale de Lausanne (CH))
24/04/2013, 10:06
Structure functions and Parton Densities
Talk in Parallel Session at DIS2013
We report measurements of Electroweak boson production in the forward region, using data collected at the LHCb experiment with a centre of mass energy of sqrt(s)=7 TeV with an integrated luminosity of up to 1.0 fb-1. W and Z bosons are reconstructed in leptonic decay channels, and their cross-sections determined using data-driven techniques. All results are compared to NNLO predictions.
Eleni Vryonidou
(U)
24/04/2013, 16:30
Electroweak Physics and Beyond the Standard Model
Talk in Parallel Session at DIS2013
The production of charm quark jets in association with electroweak gauge bosons at the LHC can be used as a tool to constrain quark parton distribution functions (PDFs). Motivated by measurements at the Tevatron and LHC, we calculate cross sections for W/Z + c, comparing these to W/Z + jet, for various PDF sets. The cross-section differences can be understood in terms of the different...
Alexander Huss
(University of Freiburg)
24/04/2013, 16:50
Electroweak Physics and Beyond the Standard Model
Talk in Parallel Session at DIS2013
We present the calculation of the most important electroweak corrections to dijet production at the LHC and the Tevatron, comprising tree-level effects of O(\alpha_s\alpha,\alpha^2) and weak loop corrections of O(\alpha_s^2\alpha). Although suppressed by the small value of the coupling constant \alpha, these corrections can become large in the high-energy domain due to the appearance of...
Clemens Lange
(Deutsches Elektronen-Synchrotron (DE))
24/04/2013, 17:10
Structure functions and Parton Densities
Talk in Parallel Session at DIS2013
Measurement of W+c production cross section has a unique sensitivity to the strange-quark density, which is poorly known at low x. W+b production, on the other hand, probes the b-quark production by higher order QCD processes. Cross sections are measured differentially as a function of jet multiplicity and transverse momentum of the leading b-jet, for the W+b measurement and as a function of...
Bernd Surrow
24/04/2013, 17:30
Structure functions and Parton Densities
Talk in Parallel Session at DIS2013
The STAR experiment at the Relativistic Heavy-Ion Collider at Brookhaven National
Laboratory is carrying out a spin physics program in high-energy polarized proton collisions
at $\sqrt{s}=200\,$GeV and $\sqrt{s}=500\,$GeV
to gain a deeper insight into the spin structure and
dynamics of the proton.
The collision of polarized protons at $\sqrt{s}=500\,$GeV opens a new era of spin-flavor...
