Search results for "Z0"
showing 10 items of 712 documents
The Reasonable Effectiveness of Mathematical Deformation Theory in Physics
2019
This is a brief reminder, with extensions, from a different angle and for a less specialized audience, of my presentation at WGMP32 in July 2013, to which I refer for more details on the topics hinted at in the title, mainly deformation theory applied to quantization and symmetries (of elementary particles).
"Table 21" of "Measurement of the production cross section of jets in association with a Z boson in pp collisions at $\sqrt{s}$ = 7 TeV with the ATLA…
2015
The distribution of Dy (jj). The first (sys) error is the uncorrelated systematic error and the second the correlated systematic error.
"Table 8" of "Measurement of the production cross section for Z/gamma* in association with jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS de…
2014
Jet differential cross section dsigma/dy as a function of the second-leading jet y corrected to the lepton common fiducial region and for QED radiation effects.
"Table 7" of "Measurement of the production cross section for Z/gamma* in association with jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS de…
2014
Jet differential cross section dsigma/dy as a function of the leading jet y corrected to the lepton common fiducial region and for QED radiation effects.
"Table 6" of "Measurement of the production cross section for Z/gamma* in association with jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS de…
2014
Inclusive jet differential cross section dsigma/dy corrected to the lepton common fiducial region and for QED radiation effects.
"Table 2" of "A Precise Determination of the Number of Families With Light Neutrinos and of the $Z$ Boson Partial Widths"
1990
Calorimeter selection.
"Table 2" of "Measurement of electroweak parameters from Z decays into Fermion pairs"
1990
Hadronic cross section from the calorimeter selection trigger.
"Table 4" of "Search for dark matter in events with a hadronically decaying W or Z boson and missing transverse momentum in pp collisions at sqrt(s)=…
2014
Observed limits on the effective theory mass scale M* as a function of the dark matter mass M(chi) at 90% confidence-level from combined mono-W-boson and mono-Z-boson signals for various operators.
DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE
1993
The strong coupling constant for b quarks has been determined, and its flavour independence, as predicted by QCD, investigated. The analysis involved events with lepton candidates selected from approximately 356 000 hadronic decays of the Z0, collected by the DELPHI detector at LEP in 1990 and 199 1. A method based on a direct comparison of the three-jet fraction in a b enriched sample, selected by requiring leptons with large momenta and transverse momenta, to that of the entire hadronic sample, illustrated the significant effect of the b quark mass on the multi-jet cross section, and verified the flavour independence of the strong coupling constant to an accuracy of +/- 6%. A second proce…
A$_{FB}$ in the SMEFT: precision Z physics at the LHC
2021
We study the forward-backward asymmetry $A_{FB}$ in $pp \to \ell^+\ell^-$ at the Z peak within the Standard Model Effective Field Theory (SMEFT). We find that this observable provides per mille level constraints on the vertex corrections of the Z boson to quarks,which close a flat direction in the electroweak precision SMEFT fit. Moreover, we show that current $A_{FB}$ data is precise enough so that its inclusion in the fit improves significantly LEP bounds even in simple New Physics setups. This demonstrates that the LHC can compete with and complement LEP when it comes to precision measurements of the Z boson properties