3,648 research outputs found
Electromagnetic and Weak Nuclear Structure Functions in the Intermediate Region of
We have studied nuclear structure functions and
for electromagnetic and weak processes in the region of . The nuclear medium effects arising due to Fermi motion,
binding energy, nucleon correlations, mesonic contributions and shadowing
effects are taken into account using a many body field theoretical approach.
The calculations are performed in a local density approximation using a
relativistic nucleon spectral function. The results are compared with the
available experimental data. Implications of nuclear medium effects on the
validity of Callan-Gross relation are also discussed.Comment: Published in Journal of the Physical Society of Japan (NuInt-2015
Nucleon and nuclear structure functions with non-perturbative and higher order perturbative QCD effects
We have studied the nucleon structure functions ,
by including contributions due to the higher order perturbative QCD effect up
to NNLO and the non-perturbative effects due to the kinematical and dynamical
higher twist (HT) effects. The numerical results for are
obtained using Martin, Motylinski, Harland-Lang, Thorne (MMHT) 2014 NLO and
NNLO nucleon parton distribution functions (PDFs). The dynamical HT correction
has been included following the renormalon approach as well as the
phenomenological approach and the kinematical HT effect is incorporated using
the works of Schienbein et al. These nucleon structure functions have been used
as an input to calculate the nuclear structure functions .
In a nucleus, the nuclear corrections arise because of the Fermi motion,
binding energy, nucleon correlations, mesonic contribution, shadowing and
antishadowing effects. These nuclear corrections are taken into account in the
numerical calculations to obtain the nuclear structure functions , for the various nuclear targets like , , ,
, , and which are of experimental
interest.
The effect of isoscalarity correction for nonisoscalar nuclear targets has
also been studied.
The results for the are compared with nCTEQ nuclear
PDFs parameterization as well as with the experimental results from JLab, SLAC
and NMC in the kinematic region of for several nuclei.Comment: arXiv admin note: text overlap with arXiv:1705.0990
Revisiting and Induced Quasielastic Scattering from Nuclei in Sub-GeV Energy Region
We present the results of charged current quasielastic(CCQE) scattering cross
sections from free as well as bound nucleons like in , ,
and nuclear targets in 1 GeV
energy region.
The results are obtained using local Fermi gas model with and without RPA
effect.
The differences those may arise in the electron and muon production cross
sections due to the different lepton mass, uncertainties in the axial dipole
mass and pseudoscalar form factor, and due to the inclusion of second
class currents have been highlighted for neutrino/antineutrino induced
processes.Comment: Published in Journal of the Physical Society of Japan (NuInt-2015
Pakistani physicians and the repatriation equation
In Pakistan, students who are accepted into medical school are congratulated — only half-jokingly — on three counts: that they will become doctors, that they will become certified by the American Board of Medical Specialties, and that they will soon be living in the United States
Complexes of Some Group(IV) Metal Halides with 5-Aminoindazole
The synthesis and characterisation of Sn(IV) halides, Ge(IV),
Ti(IV) and Zr(IV) chloride complexes of the type MX4 : Li_ 2 with
5-aminoindazole has been made. The possible structure of these
complexes has been proposed on the basis of elemental analysis
and infrared spectroscopy. The IR spectra suggest unidentate
behaviour of the ligand involving pyrrole nitrogen in all the cases
except the tin(IV) bromide complex, where the ligand exhibits its
bidentate nature, involving the pyridyl nitrogen. An octahedral
geometry has been proposed for all the complexes. In the case
of MX4 :\u27L type complexes, except for SnBr4 : L, an octahedral
halogen bridged structure has been proposed
Longevity and mortality in Kennel Club registered dog breeds in the UK in 2014
Abstract Background The domestic dog is one of the most diverse mammalian species, exhibiting wide variations in morphology, behaviour and morbidity across breeds. Therefore, it is not unexpected that breeds should also exhibit variation in mortality and longevity. While shorter longevity per se may not necessarily be a welfare issue, a generally foreshortened lifespan in a breed that is accompanied by a high prevalence of a particular cause of death may reveal potentially serious welfare concerns and highlight scope to improve breed welfare. Survey data gathered directly from owners offer useful insights into canine longevity and mortality that can support the overall evidence base for welfare reforms within breeds. Results Mortality data on 5663 deceased dogs registered with the UK Kennel Club were collected from an owner-based survey. The most commonly reported causes of death were old age (13.8%), unspecified cancer (8.7%) and heart failure (4.9%); with 5.1% of deaths reported as unknown cause. Overall median age at death was 10.33 years (interquartile range: 7.17–12.83 years). Breeds varied widely in median longevity overall from the West Highland Terrier (12.71 years) to the Dobermann Pinscher (7.67 years). There was also wide variation in the prevalence of some common causes of death among breeds, and in median longevity across the causes of death. Conclusion Substantial variation in the median lifespan and the prominent causes of death exists across breeds. This study has identified some breeds with both a low median lifespan and also a high proportional mortality for one or more specific causes of death that should be considered as both potential welfare concerns as well as opportunities for improvement
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