English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Two analyses are performed with the large samples of dielectron and dimuon eventscollected by the D0 experiment at the Fermilab Tevatron $p\bar{p}$ collider.The dilepton transverse momentum ($p_T$) distribution in \zll\ production is a powerful probe of Quantum chromodynamics.Until now, this distribution has been measured with limited precision.An alternative variable, \phistar, is proposed due to its relatively low susceptibility to detector effects.The \phistar\ distribution of events with \zll\ invariant masses between 70 and 110~GeV,is measured in three bins of dilepton rapidity.This measurement, with 7.3 fb$^{-1}$ of data, is significantly more precise than previous measurementsof the $p_T$ distribution.A state-of-the-art QCD Monte Carlo program is in modest agreement with the data.Using 8.6 fb$^{-1}$ of data, the\zzllnunu\ and \wzlllnu\ processes are studied, yieldingproduction cross sections of,$\sigma(p\bar{p} \rightarrow ZZ/\gamma^*)$ = 1.64 $\pm$ 0.46 pb and$\sigma(p\bar{p} \rightarrow WZ/\gamma^*)$ = 4.46 $\pm$ 0.64 pb,for \zll\ invariant masses between 60 and 130~GeV.These are in agreement with Standard Model predictions.

osti oai (u.s. department of energy office of scientific and technical information)

A Measurement of the Z Boson Transverse Momentum Distribution, and of the ZZ and WZ Production Cross Sections Using 7.3-8.6 fb$^{-1}$ of $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV