16 research outputs found
The pro-apoptotic effect of a Terpene-rich Annona cherimola leaf extract on leukemic cell lines
Measurement of high- charged current deep inelastic scattering cross sections with a longitudinally polarised positron beam at HERA
Measurement of Beauty Production in Deep Inelastic Scattering at HERA Using Decays into Electrons
Inclusive dijet cross sections in neutral current deep inelastic scattering at HERA
Single- and double-differential inclusive dijet cross sections in neutral current deep inelastic ep scattering have been measured with the ZEUS detector using an integrated luminosity of 374 pb(-1). The measurement was performed at large values of the photon virtuality, Q (2), between 125 and 20 000 GeV2. The jets were reconstructed with the k (T) cluster algorithm in the Breit reference frame and selected by requiring their transverse energies in the Breit frame, E-jet (T,B), to be larger than 8 GeV. In addition, the invariant mass of the dijet system, M-jj,M- was required to be greater than 20 GeV. The cross sections are described by the predictions of next-to-leading-order QCD
Inclusive dijet cross sections in neutral current deep inelastic scattering at HERA
Single- and double-differential inclusive dijet cross sections in neutral current deep inelastic ep scattering have been measured with the ZEUS detector using an integrated luminosity of 374 pb(-1). The measurement was performed at large values of the photon virtuality, Q (2), between 125 and 20 000 GeV2. The jets were reconstructed with the k (T) cluster algorithm in the Breit reference frame and selected by requiring their transverse energies in the Breit frame, E-jet (T,B), to be larger than 8 GeV. In addition, the invariant mass of the dijet system, M-jj,M- was required to be greater than 20 GeV. The cross sections are described by the predictions of next-to-leading-order QCD
Measurement of Heavy-Qark Jet Photoproduction at HERA
Photoproduction of beauty and charm quarks in events with at least two jets
has been measured with the ZEUS detector at HERA using an integrated luminosity
of 133 . The fractions of jets containing b and c quarks were
extracted using the invariant mass of charged tracks associated with secondary
vertices and the decay-length significance of these vertices. Differential
cross sections as a function of jet transverse momentum, ,
and pseudorapidity, , were measured. The data are compared
with previous measurements and are well described by next-to-leading-order QCD
predictions.Comment: 35 pages, 9 figures, 3 table
Study of tau-Pair Production at HERA
A study of events containing two tau leptons with high transverse momentum has been performed with the ZEUS detector at HERA, using a data sample corresponding to an integrated luminosity of 0.33 fb<sup>−1</sup>. The tau candidates were identified from their decays into electrons, muons or hadronic jets. The number of tau-pair candidates has been compared with the prediction from the Standard Model, where the largest contribution is expected from Bethe-Heitler processes. The total visible cross section was extracted. Standard Model expectations agree well with the measured distributions, also at high invariant mass of the tau pair