نتایج جستجو برای: section analysis
تعداد نتایج: 2941736 فیلتر نتایج به سال:
An approach to calculate radiative corrections to unpolarized cross section of semi-inclusive electroproduction is developed. An explicit formulae for the lowest order QED radiative correction are presented. Detailed numerical analysis is performed for the kinematics of experiments at the fixed targets.
BACKGROUND Delaying the first childbirth to an advanced age has increased significantly during the last decades, but little is known about older first time mothers' experience of childbirth. This study investigates the associations between advanced maternal age in primiparous women and the postnatal assessment of childbirth. METHODS The study was based on the National Norwegian Mother and Chi...
We have calculated the complete electroweak O(α) radiative corrections to the single Higgs-boson production processes e + e − → ν l ¯ ν l H (l = e, µ, τ) in the electroweak Standard Model. Initial-state radiation beyond O(α) is included in the structure-function approach. The calculation of the corrections is briefly described, and numerical results are presented for the total cross section. In...
BACKGROUND Caesarean section birth is a frequent mode of delivery worldwide. Several social factors have been demonstrated to be strong predictors of caesarean births. OBJECTIVES To identify possible social predictors of caesarean section births in Italy. METHODS Data for this study were drawn from the Italian Institute of Statistics (ISTAT) survey conducted during year 2005 which comprised...
We have calculated the complete electroweak O(α) radiative corrections to the Higgs-boson production process e + e − → t ¯ tH in the electroweak Standard Model. Initial-state radiation beyond O(α) is included in the structure-function approach. The calculation of the corrections is briefly described, and numerical results are presented for the total cross section. Both the photonic and the genu...
We apply our Yennie-Frautschi-Suura exponentiated cross section formulas for the parton processes q + (¯ q)′ → q ′′ + (¯ q)′′′ + n(G) to the process q + ¯ q → t + ¯ t + n(G) at FNAL energies, where G is a QCD gluon. We use semi-analytical methods to compute the ratio r exp = σ exp /σ B , where σ exp is our soft gluon YFS exponentiated cross section and σ B is the Born cross section. For m t = 0...
We evaluate the multiplicity of hadrons in the e+e−-annihilation at a given thrust T in the modified leading-log approximation, including O( √ αs) corrections. The calculation is done at a large value of τ = 1−T by the use of the factorisation which takes place in the one-particle-inclusive cross section at a given τ . At a small τ , a different type of factorisation takes place, which also ena...
We present numerical results (including full one-loop QCD corrections) for the processes pp̄ and pp → W+W−, W±Z/γ∗ and Z/γ∗ Z/γ∗ followed by the decay of the massive vector bosons into leptons. In addition to their intrinsic importance as tests of the standard model, these processes are also backgrounds to conjectured non-standard model processes. Because of the small cross sections at the Tevat...
Economic evaluation of health care interventions based on decision analytic modelling can generate valuable information for health policy decision makers. However, the usefulness of the results obtained depends on the quality of the data input into the model; that is, the accuracy of the estimates for the costs, effectiveness, and transition probabilities between the different health states of ...
We present a new next-to-leading order calculation for fully differential single-topquark final states. The calculation is performed using phase space slicing and dipole subtraction methods. The results of the methods are found to be in agreement. The dipole subtraction method calculation retains the full spin dependence of the final state particles. We show a few numerical results to illustrat...
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