نتایج جستجو برای: deuteron polarisation
تعداد نتایج: 6660 فیلتر نتایج به سال:
The Cooler Synchrotron COSY delivers proton and deuteron beams in the momentum range from 300 MeV/c to 3400 MeV/c. The different modes of operation – internal experiments with thin or thick targets, external target experiments with slow extraction or with very short extraction pulses – require different ion optical conditions. Polarisation experiments are of increasing interest in the COSY comm...
As known, electron vacuum polarisation by nuclear Coulomb field produces the Uehling potential with range ℏ/2mec. Similarly, neutrino Z boson a long-range ∼GF2/r5 very large ℏ/2mνc. Measurements of macroscopic effects produced Geff2/r5 give limits on effective interaction constant Geff which exceed Fermi GF many orders magnitude, while from spectroscopy simple atomic systems are approaching Sta...
We present recent results on elastic deuteron Compton scattering calculations for polarised beans and targets up to next-to-leading order within Chiral Effective Field Theory in the Small Scale Expansion variant to implement a dynamical ∆(1232) degree of freedom. A simple power-counting argument discloses that np-intermediate rescattering states must be explicitly included at leading order alre...
In this sketch, some recent developments in Compton scattering off the deuteron are reviewed. The strong energy-dependence of the scalar magnetic dipole polarisability βM1 turns out to be crucial to understand the data from Saskatoon at 94 MeV. Chiral Effective Field Theory is used to extract the static iso-scalar dipole polarisabilities as ᾱs = 12.6± 1.4stat ± 1.0wavefu and β̄ s = 2.3± 1.7stat ...
Transversity and transverse momentum-dependent parton distribution functions (TMDs) are been measured in semi-inclusive deep inelastic scattering (SIDIS) by using a transversely polarized target at the COMPASS experiment. COMPASS is a fixed target experiment at the CERN M2 beamline, which provides a 160 GeV/c polarized μ+ beam. In the years 2002-2004 COMPASS has collected data with a transverse...
چکیده ندارد.
BACKGROUND Animal vision spans a great range of complexity, with systems evolving to detect variations in light intensity, distribution, colour, and polarisation. Polarisation vision systems studied to date detect one to four channels of linear polarisation, combining them in opponent pairs to provide intensity-independent operation. Circular polarisation vision has never been seen, and is wide...
In this paper, we have investigated the kaon-deuteron interaction at an incident momentum of 1 GeV/c using the relativistic and non-relativistic Faddeev method for different phenomenological and chiral potentials. By calculating the π∑ invariant mass spectra on different particle channels, we have shown that the trace of Λ(1405) resonance is visible in such spectra. In the present work, the st...
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