Gennaro Corcella
28/03/2012, 13:30
Electroweak and searches/structure functions
Searching for heavy neutral gauge bosons Z', predicted in extensions of the Standard Model based on a U(1)' gauge symmetry, is among the main new physics investigations undertaken by the experiments at the Tevatron and at the Large Hadron Collider.
I will discuss study Z' phenomenology at hadron colliders according to several U(1)'-based models and in the Sequential Standard Model. In...
Hugh Skottowe
(Harvard University (US))
28/03/2012, 13:48
Electroweak and searches/structure functions
Diboson cross sections have been measure for all combinations of W,Z and isolated photons. The cross
sections are measured in kinematic regions defined by the decay kinematics, in some cases
including vetoes on additional jets. The measurements are also extrapolated to the full phase space using
theoretical calculations of the acceptance, and are additionally used to place contsraints...
Santiago Folgueras
(Universidad de Oviedo (ES))
28/03/2012, 14:06
Electroweak and searches/structure functions
We present studies of diboson production in pp collisions at
7 TeV center-of-mass energy based on data recorded by the CMS
detector at the LHC in 2010 and 2011. These include precise
measurements of W and Z production in association with a photon
and of WW production, WZ and ZZ productions at the LHC. The leptonic
decay modes of the W and Z bosons are used. The results are
interpreted in...
Mika Vesterinen
(University of Manchester)
28/03/2012, 14:24
Electroweak and searches/structure functions
WZ/WW at the Tevatron (including WW/WZ+jets)
Tom Riddick
28/03/2012, 14:42
Electroweak and searches/structure functions
The CDF collaboration has analyzed 2.2 fb-1 of Run II electron and muon data for a new precise determination of the mass of the W boson. The result is 80.387 +/- 0.019 GeV/c2, which is more precise than the combination of all preceding measurements. An update from D0 is also expected.
Takuya Nobe
(Tokyo Institute of Technology (JP))
28/03/2012, 15:00
Electroweak and searches/structure functions
A search for events ep-> ep Z0 has been performed in ep collisions
at HERA using the ZEUS detector. The search is based on the entire HERA-I and HERA-II data set, amounting to 0.49 fb-1 of integrated luminosity. The Z0 was searched in the di-jet decay mode with elastic condition defined by etamax < 3, where etamax is defined as the pseudorapidity of the energy deposit in the calorimeter...
Martin Hentschinski
(Autonoma University Madrid/CSIC)
28/03/2012, 16:00
Electroweak and searches/structure functions
We study W/Z/DY + jet events where the W/Z/DY boson is produced in the forward direction of one of the colliding protons and a jet is produced in the forward direction of the second proton. The resulting large rapidity difference between the final states then opens up the phase space for BFKL evolution which we would like to study in more detail. As a by-product of our study, we also provide...
Jean-Baptiste Sauvan
(Universite de Paris-Sud 11 (FR))
28/03/2012, 16:18
Electroweak and searches/structure functions
W and Z boson production have been measured in the electron, muon and tau decay channels.
Total and differential cross sections, defined in terms of the decay lepton kinematics,
have been measured as a function of rapidity and transverse momentum. Ratios of the cross
sections demonstrate sensitivity to lepton universality, and the kinematic distributions
constrain parton densities and QCD...
Mr
Stephen Farry
(University College Dublin (IE))
28/03/2012, 16:36
Electroweak and searches/structure functions
We report on measurements of W and Z 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 fb-1. W and Z bosons are reconstructed in leptonic decay channels, and their cross-sections determined using data-driven techniques. Results are presented inclusively (within the fiducial...
Marco Musich
(INFN Torino (IT))
28/03/2012, 16:54
Electroweak and searches/structure functions
The mechanism of production of heavy-flavoured mesons, containing b
or c quarks, in association with vector bosons, W or Z, in the Standard
Model is only partially understood. The study of events with one or
two well-identified and isolated leptons accompanied by b-jets or
secondary vertices is therefore crucial to refine the theoretical
calculations in perturbative QCD, as well as...
Jonathan Anderson
(Universitaet Zuerich (CH))
28/03/2012, 17:12
Electroweak and searches/structure functions
We report on Drell-Yan production using data collected at the LHCb experiment with a centre of mass energy of $\sqrt{s}=7$~TeV in 2010. Drell-Yan events are selected with invariant di-muon masses $M_{\mu\mu}>10$~GeV/$c^2$. These measurements are sensitive to Bjorken-$x$ values as low as $1\times 10^{-5}$ and will provide important input to the knowledge of the parton density functions. The...
