scholarly journals Latest results concerning short range correlations obtained in the dp elastic and dp breakup processes at Nuclotron, JINR

2020 ◽  
Author(s):  
Marian Janek ◽  
Vladimir P. Ladygin ◽  
Alexander V. Averyanov ◽  
Eugene V. Chernykh ◽  
Dan D. Enache ◽  
...  
Keyword(s):  
Short Range ◽  
Spin Structure ◽  
Deuteron Beam ◽  
Nucleon Nucleon ◽  
Target Station ◽  
Analyzing Powers ◽  
Intermediate Energies ◽  
Elastic Data ◽  
Deuteron Spin ◽  
Short Range Correlations

Deuteron spin structure program is aimed on extraction of two and three nucleon forces information, including their spin dependent parts, from dp elastic and dp breakup processes investigated at intermediate energies. The dp elastic data were obtained at Internal Target Station of Nuclotron (JINR) in the energy range 400-1800 MeV using polarized deuteron beam. Strong sensitivity to the short range spin structure of the isoscalar nucleon-nucleon correlations is observed in deuteron analyzing powers. Preliminary results of the the cross section for the dp breakup reaction have been obtained at 400 MeV of deuteron energy.

scholarly journals Energy dependence of the vector Ay and tensor Ayy and Axx analyzing powers in deuteron-proton elastic scattering at large scattering angles

2019 ◽  
Vol 204 ◽  
pp. 01019 ◽  
Author(s):  
V.P. Ladygin ◽  
A.V. Averyanov ◽  
E.V. Chernykh ◽  
D. Enache ◽  
Yu.V. Gurchin ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Energy Range ◽  
Short Range ◽  
Deuteron Beam ◽  
Nucleon Nucleon ◽  
Ion Source ◽  
Wide Energy Range ◽  
Analyzing Powers ◽  
Proton Elastic Scattering ◽  
Wide Energy

The results on the angular dependencies of the vector Ay and tensor Ayy and Axx analyzing powers in deuteron-proton elastic scattering at large scattering angles are presented. These data were obtained at internal target at the JINR Nuclotron in the energy range 400-1800 MeV using polarized deuteron beam from new polarized ion source. New data on the deuteron analyzing powers in the wide energy range demonstrate strong sensitivity to the short-range spin structure of the isoscalar nucleon-nucleon correlations observed earlier. The perspectives of further studies of the short-range correlations using carbon, polarized deuteron and proton beams are discussed.

scholarly journals VME–based DAQ system for the Deuteron Spin Structure setup at the Nuclotron internal target station

2019 ◽  
Vol 204 ◽  
pp. 10003
Author(s):  
Alexander Isupov
Keyword(s):  
Data Acquisition ◽  
Spin Structure ◽  
Precise Determination ◽  
Beam Polarization ◽  
Internal Target ◽  
Software Module ◽  
Raw Data ◽  
Target Station ◽  
Current Implementation ◽  
Deuteron Spin

The new powerful VME–based data acquisition (DAQ) system has been designed for the Deuteron Spin Structure setup [1] placed at the Nuclotron Internal Target Station [2]. The DAQ system is built using the netgraph–based data acquisition and processing framework ngdp [3, 4]. The software dealing with VME hardware is a set of netgraph nodes in the form of the loadable kernel modules. The specific for current implementation nodes are described, while specific software utilities for the user context are the following. The b2r (binary–to–ROOT) server converts raw data into per trigger and per accelerator spill representations, which are based on C++ classes derived from the ROOT framework [5] ones. This approach allows us to generalize the code for histograms filling and polarization calculations. The b2r optionally stores ROOT events as ROOT TTree in file(s) on HDD, and supports the design of some express offine. The histGUI software module provides an interactive online access for human operator to histograms filled by the r2h (ROOT–to–histograms) server, which obtains the ROOT event representations from b2r. The r2h supports the calculation and histograming of runtime configurable variables as well as raw data variables, and optionally stores ROOT histograms in file(s) on HDD. Since the spin studies at the Nuclotron require fast and precise determination of the deuteron and proton beam polarization, the polarization calculator software module is introduced. This calculator based on runtime configurable r2h code allows us to compute polarization values online and integrate them into the Web–based scheme of representation and control of the polarimeters [6, 7].

scholarly journals Universality of nucleon-nucleon short-range correlations: Two-nucleon momentum distributions in few-body systems

2012 ◽  
Vol 85 (2) ◽  
Author(s):  
M. Alvioli ◽  
C. Ciofi degli Atti ◽  
L. P. Kaptari ◽  
C. B. Mezzetti ◽  
H. Morita ◽  
...  
Keyword(s):  
Short Range ◽  
Nucleon Nucleon ◽  
Nucleon Momentum ◽  
Momentum Distributions ◽  
Short Range Correlations

scholarly journals A novel nuclear dependence of nucleon–nucleon short-range correlations

2017 ◽  
Vol 769 ◽  
pp. 446-450 ◽  
Author(s):  
Hongkai Dai ◽  
Rong Wang ◽  
Yin Huang ◽  
Xurong Chen
Keyword(s):  
Short Range ◽  
Nucleon Nucleon ◽  
Nuclear Dependence ◽  
Short Range Correlations

Smooth nucleon–nucleon interactions and meson theory

1968 ◽  
Vol 46 (8) ◽  
pp. 963-969 ◽  
Author(s):  
Pierre Desgrolard ◽  
J. M. Pearson ◽  
Gérard Saunier
Keyword(s):  
Nuclear Matter ◽  
Long Range ◽  
Short Range ◽  
Singlet State ◽  
Nucleon Nucleon ◽  
Second Order ◽  
Meson Theory ◽  
The One ◽  
Range Part ◽  
Short Range Correlations

Tabakin and Davies have shown that it is possible to fit the singlet-state nucleon–nucleon data with a potential that is smooth enough to give very small second-order terms in an ordinary perturbation–theoretic treatment of nuclear matter. However, their potential is unrealistic in that the requirements of meson theory are in no way satisfied in the long-range region. It is shown here that a potential whose long-range part conforms to the OBEP of Bryan and Scott can still be made to fit the phase shifts without increasing significantly the second-order terms. Thus, with meson theory being incapable of making an unequivocal statement about the short-range region, it will only be by resorting to the experimental evidence for short-range correlations in nuclei that one will be able to resolve the question as to whether or not an interaction as smooth as the one considered here can be regarded as "real" rather than merely "effective". In any event, the existence of such correlations cannot be inferred from the singlet nucleon–nucleon data.

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