189 research outputs found
Comparability of the video-, text-based and control condition regarding demographics, baseline values of outcomes and health-care-related costs over the last three months (N = 2099).
No full texta<p>Fagerstroem Test for Cigarette Dependence (0 = not addicted, 10 = highly addicted),</p>b<p>based on the Dutch algorithm for the EQ-5D-3L scores,</p>c<p>costs for prior three month,</p>d<p>OTC: over-the-counter.</p><p>Comparability of the video-, text-based and control condition regarding demographics, baseline values of outcomes and health-care-related costs over the last three months (N = 2099).</p
High performance computing development for the next decade, and its implications for molecular modelling applications
No full textLeading neutron production in deep inelastic scattering at HERA
No full textgrantor:
University of TorontoThe properties of leading neutrons produced in deep inelastic scattering are studied. The neutrons are detected with the Forward Neutron Calorimeter (FNC). The calibration and performance of the FNC are presented. The angular dependence of leading neutrons has been parametrized in the form dN/dp2T=exp- b¤p2T , where p2T is the transverse momentum squared of the neutron. The values of ' b' are found to depend strongly on the energy of the neutron. The cross section for the kinematic region 'Q'2 > 10 GeV2 and [theta]'n' FLN32 x,Q2,xL is measured. By assuming a simple model of one pion exchange, the structure function of the pion Fp2x,Q2 is extracted. We study this quantity in a previously unexplored region, for the first time at spacelike energy scales.Ph.D
ChemInform Abstract: THE METHYL AND METHOXY TORSIONAL MODES AND THE LATTICE VIBRATIONS IN THE LOW‐FREQUENCY RAMAN SPECTRUM OF 1,4‐DIMETHOXYBENZENE
No full textMeasurement of D*+- production and the charm contribution to F(2) in deep inelastic scattering at HERA
No full textThe production of D*(+/-)(2010) mesons in deep inelastic scattering has been measured in the ZEUS detector at HERA using an integrated luminosity of 37 pb(-1). The decay channels D*(+) → D(0)pi(+) (+ c.c.), with D-0 → K(-)pi(+) or D-0 → K(- )pi(-)pi(+)pi(+), have been used to identify the D mesons. The e(+)p cross section for inclusive D*(+/-) production with 1 lt Q(2) lt 600 GeV2 and 0.02 lt y lt 0.7 is 8.31+/- 0.31(stat.)(+0.30)(-0.50) (syst.) nb in the kinematic region 1.5 lt pT(D*(+/-)) lt 15GeV and \eta(D*(+/-))\ lt 1.5. Differential cross sections are consistent with a next-to- leading-order perturbative-QCD calculation when using charm- fragmentation models which take into account the interaction of the charm quark with the proton remnant. The observed cross section is extrapolated to the full kinematic region in pr(D*(+/-)) and eta(D*(+/-)) in order to determine the charm contribution, F-2(c (c) over bar)(x,Q(2)), to the proton structllre function. The ratio F-2(c (c) over bar)/F-2 rises from similar or equal to 10% at Q(2) similar or equal to 1.8 GeV2 to similar or equal to 30% at Q(2) similar or equal to 130 GeV2 for x values in the rarlge 10(-4) to 10(-3)
Charged particles and neutral kaons in photoproduced jets at HERA
No full textCharged particles (h(+/-)) and K(0) mesons have been studied in photoproduced events containing at least one jet of E(T) > 8 GeV in a pseudorapidity interval (-0.5, 0.5) in the ZEUS laboratory frame. Distributions are presented in terms of transverse momentum, pseudorapidity and distance of the particle from the axis of a jet. The properties of h(+/-) within the jet are described well using the standard settings of PYTHIA, but the use of the multiparton interaction option improves the description outside the jets
JET PRODUCTION IN HIGH Q(2) DEEP-INELASTIC EP SCATTERING AT HERA RID B-9165-2008 RID C-5889-2009 RID A-4818-2008 RID C-1693-2008
No full textTwo-jet production in deep-inelastic electron-proton scattering has been studied for 160 < Q(2) < 1280 GeV2 0.01 < x < 0.1 and 0.04 < y < 0.95 with the ZEUS detector at HERA. The kinematic properties of the jets and the jet production rates are presented. The partonic scaling variables of the two-jet system and the rate of two-jet production are compared to perturbative next-to-leading order QCD calculations
MEASUREMENT OF THE DIFFRACTIVE STRUCTURE-FUNCTION IN DEEP-INELASTIC SCATTERING AT HERA RID B-9165-2008 RID C-5889-2009 RID A-4818-2008 RID C-1693-2008
No full textThis paper presents an analysis of the inclusive properties of diffractive deep inelastic scattering events produced in ep interactions at HERA. The events are characterised by a rapidity gap between the outgoing proton system and the remaining hadronic system. Inclusive distributions are presented and compared with Monte Carlo models for diffractive processes. The data are consistent with models where the pomeron structure function has a hard and a soft contribution. The diffractive structure function is measured as a function of x(p), the momentum fraction lost by the proton, of beta, the momentum fraction of the struck quark with respect to x(p), and of Q(2) in the range 6.3 10(-4) < x(p) < 10(-2), 0.1 < .beta < 0.8 and 8 < Q(2) < 100 GeV2. The x(p) dependence is consistent with the form (1/x(p))(alpha) where alpha = 1.30 +/- 0.08 (stat)(-0.14)(+0.08) (sys) in all bins of beta and Q(2). In the measured Q(2) range, the diffractive structure function approximately scales with Q(2) at fixed beta. In an Ingelman-Schlein type model where commonly used pomeron flux factor normalisations are assumed, it is found that the quarks within the pomeron do not saturate the momentum sum rule
NEUTRAL STRANGE PARTICLE-PRODUCTION IN DEEP-INELASTIC SCATTERING AT HERA RID B-9165-2008 RID C-5889-2009 RID A-4818-2008 RID C-1693-2008
No full textThis paper presents measurements of K-0 and Lambda production in neutral current, deep inelastic scattering of 26.7 GeV electrons and 820 GeV protons in the kinematic range 10 0.04. Average multiplicities for K-0 and Lambda production are determined for transverse momenta p(T) > 0.5 GeV and pseudorapidities \eta\ < 1.3. The multiplicities favour a stronger strange to light quark suppression in the fragmentation chain than found in e(+)e(-) experiments. The production properties of K-0's in events with and without a large rapidity gap with respect to the proton direction are compared. The ratio of neutral K-0's to charged particles per event in the measured kinematic range is, within the present statistics, the same in both samples
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