Few-body Studies at Nuclotron-JINR

Ladygin, V. P.; Gurchin, Yu. V.; Piyadin, S. M.; Terekhin, A. A.; Isupov, A.; Janek, M.; Karachuk, J. T.; Khrenov, A. N.; Краснов, В. А.; Kurilkin, A.; Kurilkin, P. K.; Ladygina, N. B.; Livanov, A. N.; Martinská, G.; Rapatsky, V.; Reznikov, S. G.; Ryabchuk, V. V.; Trpisova, B.; Vasiliev, T.; Vnukov, I. E.

doi:10.1007/s00601-014-0804-8

Cited by 31 publications

(23 citation statements)

References 12 publications

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“…The main goal of the Deuteron Spin Structure (DSS) experimental program is to obtain the information on the spin -dependent parts of two-nucleon (2N ) and three-nucleon (3N ) forces from two processes: dp-elastic scattering in a wide energy range and dp-nonmesonic breakup with two protons detection at energies 300 -500 MeV [20,21,22]. The motivation of this program is based on theoretical analysis of the experimental results obtained at low and intermediate energies for the deuteron induced reactions (see recent reviews [23,24] and references therein).…”

Section: Recent Results and Further Plans For Internal Target Experimmentioning

confidence: 99%

“…As the first stage of the Deuteron Spin Structure (DSS) experimental program [20,21,22] the beam energy scan of dp-elastic scattering cross section at the deuteron energies 400 -2000 MeV and measurements of dp-non-mesonic breakup at 300, 400 and 500 MeV in different kinematic configurations have been performed at Nuclotron. These measurements were performed using internal target station at Nuclotron [32] with new control and data acquisition system [33].…”

Section: Recent Results and Further Plans For Internal Target Experimmentioning

confidence: 99%

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Study of polarization effects at Nuclotron

Ladygin

Janek

Kurilkin

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. The major goal of the upgraded Nuclotron facility is to obtain the information on the equation-of-state for dense nuclear matter playing a key role in the under standing of the collapse supernovae and neutron stars stability. These studies can be performed either in heavy ion collisions or via the short-range few nucleon correlations. The obtained experimental results and future program with the use of polarized deuteron beam and the internal target station are discussed. The polarization studies for the NN, NA and dA reactions with the extracted deuteron beam at the BM@N setup are proposed. The further extension of the polarization program at BM@N is related with the study of the in-medium modification of the polarization for the strange and multi-strange baryons and the spin alignment for vector mesons decaying in hadronic modes. IntroductionThe Nuclotron at JINR will provide beams of heavy ions with energies up to 6 A·GeV for isospin symmetric nuclei, and 4.65 A·GeV for Au nuclei. In central heavy-ion collisions at these energies, nuclear densities of about 4 times nuclear matter density can be reached. These conditions are well suited to investigate the equation-of-state (EOS) of dense nuclear matter which plays a central role for the dynamics of core collapse supernovae and for the stability of neutron stars. The observation of multi-strange hyperons or of light hypernuclei at Nuclotron energies would represent a breakthrough in our understanding of strange matter, and would pave the road for the experimental exploration of the 3-rd dimension of the nuclear chart [1]. These studies are complimentary to the CBM experimental program at SIS100 [2]. Another tool to investigate the EOS at large densities is the study of the short range correlations (SRC) of nucleons in nuclei which is the subject of intensive theoretical and experimental works during last years. Since SRC have densities comparable to the density in the center of a nucleon which is about ρ ∼ 5ρ 0 (ρ 0 ≈ 0.17 fm −3 ), they can be considered as the drops of cold dense nuclear matter [3]. These studies explore a new part of the phase diagram and very essential to understand the evolution of neutron stars.The results obtained at BNL [4], SLAC [5] and JLAB [6,7] clearly demonstrate that more than 90% all nucleons with momenta k ≥ 300 MeV/c belong to 2N SRC; the probability for a given proton with momenta 300 ≤ k ≤ 600 MeV/c to belong to pn correlation is ∼18 times larger than for pp correlations; the probability for a nucleon to have momentum ≥ 300 MeV/c in medium nuclei is ∼25%; 3N SRC are present in nuclei with a significant probability [8]. However, still many open questions persist and further investigations are required both from the

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Section: Recent Results and Further Plans For Internal Target Experimmentioning

confidence: 99%

Section: Recent Results and Further Plans For Internal Target Experimmentioning

confidence: 99%

Study of polarization effects at Nuclotron

Ladygin

Janek

Kurilkin

et al. 2016

J. Phys.: Conf. Ser.

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“…The first stage of the DSS experimental program 10,16,17 is the beam energy scan of dp-elastic scattering cross section at the deuteron energies from 400 up to 2000 MeV and measurements of dp-non-mesonic breakup at 300, 400 and 500 MeV in different kinematic configurations. These measurements will be performed using ITS 18 with new control and data acquisition system.…”

Section: The Experimental Setupmentioning

confidence: 99%

Experimental data on the dp → ppn reaction at the deuteron energy of 300–500MeV obtained at ITS at Nuclotron

Piyadin

Gurchin

Isupov

et al. 2015

Int. J. Mod. Phys. Conf. Ser.

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The experiment on dp non-mesonic breakup at Internal Target Station at Nuclotron is presented. Recent results on the study of the dp-breakup reaction with 300-500 MeV unpolarized deuteron beam at Internal Target Station at Nuclotron are discussed. Selection procedure of useful events for the dp → ppn reaction with the registration of two protons is shown. Further scientific program with polarized and unpolarized deuterons is discussed.

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“…The Deuteron Spin Structure (DSS) setup [1], [2], [3], [4] placed at the Nuclotron Internal Target Station (ITS) [5] studies the polarization observables in the dp elastic scattering for a several years [6]. Vector and tensor polarizations of the deuteron and proton beams from the LHEP-JINR polarized ions source (SPI) [7], as well as A y , A yy , A xx analyzing powers of the reactions have been successfully measured in the beam energy range from 135 MeV/nucleon to 900 MeV/nucleon.…”

Section: Introductionmentioning

confidence: 99%

Online polarimetry of the Nuclotron internal deuteron and proton beams

Isupov

2017

J. Phys.: Conf. Ser.

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Abstract. The spin studies at Nuclotron require fast and precise determination of the deuteron and proton beam polarization. For these purposes new powerful VME-based data acquisition (DAQ) system has been designed for the Deuteron Spin Structure setup placed at the Nuclotron Internal Target Station. The DAQ system is built using the netgraph-based data acquisition and processing framework ngdp. The software dealing with VME hardware is a set of netgraph nodes in form of the loadable kernel modules, so works in the operating system kernel context. The specific for current implementation nodes and user context utilities are described. The online events representation by ROOT classes allows us to generalize code for histograms filling and polarization calculations. The DAQ system was successfully used during 53 rd and 54 th Nuclotron runs, and their suitability for online polarimetry is demonstrated.

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Few-body Studies at Nuclotron-JINR

Cited by 31 publications

References 12 publications

Study of polarization effects at Nuclotron

Study of polarization effects at Nuclotron

Experimental data on the dp → ppn reaction at the deuteron energy of 300–500MeV obtained at ITS at Nuclotron

Online polarimetry of the Nuclotron internal deuteron and proton beams

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