F. Miconi

Measurement of the inclusive jet cross section in p pbar collisions at sqrt(s)=1.96 TeV

We report on a measurement of the inclusive jet cross section in pp collisions at a center-of-mass energy √s = 1.96 TeV using data collected by the DO experiment at the Fermilab Tevatron Collider corresponding to an integrated luminosity of 0.70 fb -1 . The data cover jet transverse momenta from 50 to 600 GeV and jet rapidities in the range -2.4 to 2.4. Detailed studies of correlations between systematic uncertainties in transverse momentum and rapidity are presented, and the cross section measurements are found to be in good agreement with next-to-leading order QCD calculations.

Measurement of the ppbar -> W+b+X production cross section at \sqrt{s}=1.96 TeV

We present a measurement of the cross section for W boson production in association with at least one b-quark jet in proton-antiproton collisions. The measurement is made using data corresponding to an integrated luminosity of 6.1fb-1 recorded with the D0 detector at the Fermilab Tevatron pp Collider at s=1.96TeV. We measure an inclusive cross section of σ(W(→μν)+b+X)=1.04±0.05(stat.)±0.12(syst.) pb and σ(W(→eν)+b+X)=1.00±0.04(stat.)±0.12(syst.) pb in the phase space defined by pTνg25GeV, pTb-jetg20 GeV, |ηb-jet|l1.1, and a muon (electron) with pTlg20 GeV and |ημ|l1.7 (|ηe|l1.1 or 1.5l|ηe|l2.5). The combined result per lepton family is σ(W(→lν)+b+X)=1.05±0.12(stat.+syst.) pb for |ηl|l1.7. The results are in agreement with predictions from next-to-leading order QCD calculations using mcfm, σ(W+b){dot operator}B(W→lν)=1.34-0.34+0.41(syst.) pb, and also with predictions from the sherpa and madgraph Monte Carlo event generators.We present a measurement of the cross section for

Measurement of the forward-backward asymmetry of

W

\Lambda

boson production in association with at least one {

and

b

\bar{\Lambda}

-quark} jet in proton-antiproton collisions. The measurement is made using data corresponding to an integrated luminosity of 6.1\ifb recorded with the D0 detector at the Fermilab Tevatron \ppbar Collider at

production in

\sqrt{s}=1.96