نتایج جستجو برای: cross section dependence
تعداد نتایج: 759052 فیلتر نتایج به سال:
It is noted that the model of Cheng and Wu used to explain high energy hadronic cross sections implies average multiplicities much smaller than those experimentally observed. (Submitted to Phys. Letters B) * Work supported by the U. S. Atomic Energy Commission. t National Research Council of Canada, Post doctoral Fellow. Although many types of functional s-dependence [ l] can be invoked to fit ...
The primary goal of this experiment in Hall C is the measurement of the Adependence of quasi-free J/ψ photoproduction with an average photon energy near 11 GeV. Analysis of these data will permit a greatly improved determination of the fundamental J/ψ-nucleon total cross section. In order to reduce modeling uncertainties, we will also make precision measurements of the (s, t) dependence of the ...
The PP2PP experiment is devoted to the proton – proton elastic scattering measurements at the Relativistic Heavy Ion Collider (RHIC) at the centre-of-mass energies 50 ≤ √ s ≤ 500 GeV and the four-momentum transfer 0.0004 ≤ |t| ≤ 1.3 GeV. The option of polarized proton beams offers a unique possibility to investigate the spin dependence of the proton elastic scattering in a systematic way. The e...
Version 1.6.0 of the code SusHi is presented. Concerning inclusive CP-even Higgs production in gluon fusion, the following new features with respect to previous versions have been implemented: expansion of the partonic cross section in the soft limit, i.e. around x = M H/ŝ → 1; N3LO QCD corrections in terms of the soft expansion; top-quark mass suppressed terms through NNLO; matching to the cro...
x F-dependence of J/Ψ suppression in pA collisions. Abstract Coherence effects are important in the description of collisions with extended objects as nuclei. At fixed target energies and small x F , the coherence length of the fluctuation containing the c¯ c is small and the usual nuclear absorption model is valid. However, at higher energies and/or x F the nucleus is seen as a whole by the fl...
We report experimental and theoretical investigations on the pressure dependence of the Raman-active radial and tangential vibrational modes of single-wall carbon-nanotube bundles. Using 514.5-nm excitation, we find that the radial mode intensity disappears beyond 1.5 GPa, and the tangential mode intensity also drops considerably above this pressure. This observation is tentatively attributed t...
The dependence of the rate of proton-proton interactions on the centre-of-mass collision energy, √s, is of fundamental importance for both hadron collider physics and particle astrophysics. The dependence cannot yet be calculated from first principles; therefore, experimental measurements are needed. Here we present the first measurement of the inelastic proton-proton interaction cross-section ...
We provide complete analytic expressions for the isolated prompt photon production cross section in e+e− annihilation reactions through one-loop order in quantum chromodynamics (QCD) perturbation theory. Functional dependences on the isolation cone size δ and isolation energy parameter are derived. The energy dependence as well as the full angular dependence of the cross section on θγ are displ...
A number of studies have estimated the income elasticity of health care expenditure to identify whether health care is a necessary or luxury product. However, the issue has received less attention in developing countries, especially in Asian economies. The current study for the first time has used the panel data covering 36 Asian countries for the period 1995-2013 for revealing the nature of he...
A procedure is proposed which accounts for final state interaction corrections for near threshold meson production in nucleon-nucleon scattering. In analogy with the Watson-Migdal approximation, it is shown that in the limit of extremely strong final state effects, the amplitude factorizes into a primary production amplitude and an elastic scattering amplitude describing a 3 → 3 transition. Thi...
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