ﻻ يوجد ملخص باللغة العربية
Top quark production in the forward region in proton-proton collisions is observed for the first time. The $W!+!b$ final state with $Wtomu u$ is reconstructed using muons with a transverse momentum, $p_{rm T}$, larger than 25 GeV in the pseudorapidity range $2.0<eta<4.5$. The $b$ jets are required to have $50 < p_{rm T} < 100$ GeV and $2.2 < eta < 4.2$, while the transverse component of the sum of the muon and $b$-jet momenta must satisfy $p_{rm T} > 20$ GeV. The results are based on data corresponding to integrated luminosities of 1.0 and $2.0$ fb$^{-1}$ collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross-sections in the fiducial region are $sigma({rm top})[7rm{TeV}] = 239pm53({rm stat})pm33({rm syst})pm24({rm theory}),{rm fb}$ and $sigma({rm top})[8rm{TeV}] = 289pm43({rm stat})pm40({rm syst})pm29({rm theory}),{rm fb}$. These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order Standard Model predictions.
This paper reports on the first observation of electroweak production of single top quarks by the DZero and CDF collaborations. At Fermilabs 1.96 TeV proton-antiproton collider, a few thousand events are selected from several inverse femtobarns of da
We report on the observation of single top quark production by the D0 collaboration using a dataset of 2.3 fb^-1 collected at the Fermilab Tevatron ppbar collider. Several multivariate techniques are combined to separate the single top signal from ba
We review the current status of the cross sections measurement of the top-quark at the LHC and at the Tevatron. Total production cross sections, studies using single top quark events and differential $rm{t}bar{rm t}$ cross sections are discussed. The
Single top-quark t-channel production is exploited for studies of top quark properties. The analyses include the measurement of the CKM matrix element, $|V_{tb}|$, search for anomalous couplings of the top quark using a Bayesian neural network analys
A search for associated production of a $Z$ boson with an open charm meson is presented using a data sample, corresponding to an integrated luminosity of $1.0,mathrm{fb}^{-`}$ of proton--proton collisions at a centre-of-mass energy of 7,TeV, collecte