Joint refinement of a local wave-function model from Compton and Bragg scattering data

2001 ◽  
Vol 63 (23) ◽  
Author(s):  
J.-M. Gillet ◽  
P. J. Becker ◽  
P. Cortona
Keyword(s):  
Wave Function ◽  
Scattering Data ◽  
Bragg Scattering ◽  
Function Model ◽  
Local Wave

scholarly journals Λb→ΛcP(V) NONLEPTONIC WEAK DECAYS

1998 ◽  
Vol 13 (28) ◽  
pp. 2265-2277 ◽  
Author(s):  
X.-H. GUO
Keyword(s):  
Wave Function ◽  
Vector Mesons ◽  
Function Model ◽  
Factorization Approach ◽  
Weak Decays

The two-body nonleptonic weak decays of Λb→ΛcP(V) (P and V represent pseudoscalar and vector mesons respectively) are analyzed in two models: Bethe–Salpeter (BS) model and hadronic wave function model. The calculations are carried out in the factorization approach. The obtained results are compared with other models' calculations.

scholarly journals Wave-function model for the CP violation in mesons

2017 ◽  
Vol 27 (10) ◽  
pp. 104605 ◽  
Author(s):  
S. M. Saberi Fathi ◽  
M. Courbage ◽  
T. Durt
Keyword(s):  
Wave Function ◽  
Cp Violation ◽  
Function Model

scholarly journals STUDY OF NUCLEON CORRELATIONS IN HEAVY NUCLEI WITH HIGH ENERGY ELASTIC ELECTRON SCATTERING

2020 ◽  
Vol 2 ◽  
pp. 61
Author(s):  
C. E. Vellidis ◽  
B. Frois ◽  
D. Goutte ◽  
N. Papadakis ◽  
C. N. Papanicolas ◽  
...  
Keyword(s):  
Wave Function ◽  
Electron Scattering ◽  
High Energy ◽  
Elastic Cross Section ◽  
Scattering Data ◽  
Elastic Electron Scattering ◽  
Heavy Nuclei ◽  
Independent Particle ◽  
Particle Wave Function ◽  
New Research

During the last decade the detailed analysis of several observables and especially of electron scattering data has shown conclusively the presence of short-range nucleon correlations. As a result the degree to which the shape and amplitude of a correlated wave function can be approximated by an independent particle wave function has emerged as a question of fundamental importance. A presentation will be given below of an experiment that will be performed at the Bates Linear Accelerator Center attempting to study this question. The elastic cross-section ratios from 208,207,206Pb,205Ti(e,e) will be measured with high accuracy up to momentum transfers of 3.4 fm^-1 in order to study the influence of correlations on the shape of the 3s1/2 proton wave function. The purpose, motivation and main aspects of the new research will be explained and the experimental considerations together with the running scenario for the experiment will be presented.

Relationships between the medium-range structure of glasses and crystals

2000 ◽  
Vol 64 (3) ◽  
pp. 425-434 ◽  
Author(s):  
P. H. Gaskell
Keyword(s):  
Chalcogenide Glasses ◽  
Local Environment ◽  
Quantitative Agreement ◽  
Real Space ◽  
Scattering Data ◽  
Bragg Scattering ◽  
Structure Of Glasses ◽  
Medium Range ◽  
Unknown Structure ◽  
Space Data

AbstractThe known structure of a crystalline phase is almost always useful in investigating the unknown structure of the compositionally equivalent glass. For the local environment around elements like Si, B and P, the correspondence between site geometry and symmetry can be impressively close. Beyond near neighbours, any relationship becomes less obvious – at least in real-space data. Progress in understanding the medium-range structures of glasses has been painfully slow as a result. One essential clue is given by reciprocal-space features at low Q (scattering vector) in X-ray or neutron scattering data, which are clearly related to the medium-range structure. Interpretation of these features as ‘quasi-Bragg’ scattering allows direct comparison between the structures of the glass and equivalent crystalline phases. Applications of this method will be illustrated in borates and silicates, together with some chalcogenide glasses. Correspondence between low-Q features for these glasses and compositionally-equivalent crystals is qualitatively good. In some cases there is semi-quantitative agreement too. Thus the essential flavour of the medium-range structure of several typical glasses appears to be interpretable, rather easily.

Distorted Pion Wave Function in the Pionic Decay of the Lightest Λ Hypernuclei

1997 ◽  
Vol 12 (07) ◽  
pp. 511-520 ◽  
Author(s):  
Neelima G. Kelkar
Keyword(s):  
Wave Function ◽  
Optical Potential ◽  
Decay Rates ◽  
Scattering Data ◽  
Exact Results ◽  
Distorted Wave ◽  
Mesonic Decay ◽  
Pion Wave Function ◽  
Nucleus Scattering ◽  
Good Agreement

The effect of pion distortions is studied in the π-mesonic decay [Formula: see text] of the lightest Λ hypernuclei. Reduction in the decay rates of both these nuclei is observed. This is in contrast to previous observations of enhancements in the decay rates of all nuclei ranging from [Formula: see text] to [Formula: see text]. The distorted wave function is evaluated using a theoretically deduced pion–nucleus optical potential. Calculations are also made using phenomenological optical potentials which fit the pion–nucleus scattering data quite well. Results with theoretical and phenomenological potentials are in fairly good agreement qualitatively, but the exact results are sensitive to the type of optical potential used.

scholarly journals Zero-point divacancy concentration in the shadow wave function model for solidH4e

2009 ◽  
Vol 80 (17) ◽  
Author(s):  
R. Pessoa ◽  
M. de Koning ◽  
S. A. Vitiello
Keyword(s):  
Wave Function ◽  
Zero Point ◽  
Function Model
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