Measurement of the tensor analyzing power Ayy in inclusive breakup of 9 GeV/c deuterons on carbon at large transverse momenta of protons

Afanasiev, S.; Arkhipov, V. V.; Azhgirey, L. S.; Bondarev, V.K.; Chernykh, E. V.; Ehara, M.; Ershov, V. P.; Filipov, G.; Fimushkin, V. V.; Fukui, S.; Hasegawa, S.; Hasegawa, T.; Horikawa, N.; Isupov, A. Yu.; Iwata, T.; Kageya, T.; Kashirin, V. A.; Kawano, Masahiro; Khrenov, A. N.; Kirillov, A.D.; Колесников, В. И.; Ladygin, V. P.; Litvinenko, A.; Malakhov, A.; Matsuda, T.; Migulina, I. I.; Nakayama, Hiroyuki; Nikiforov, A.; Nomofilov, A.A.; Osada, E.; Penev, V.N.; Pilipenko, Yu.K.; Reznikov, S. G.; Rukoyatkin, P.; Semenov, A. Yu.; Семенова, И. А.; Sharov, V.I.; Stoletov, G.D.; Strunov, L.N.; Takabayashi, N.; Wakai, A.; Yudin, N. P.; Zaporozhets, S.; Zhmyrov, V. N.; Zolin, L.

doi:10.1016/s0370-2693(98)00733-3

Cited by 22 publications

(6 citation statements)

References 32 publications

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“…The target position in the middle of the switched off magnet corresponds to ∼100 mr. This configuration can be used for the measurements of the tensor A yy and vector A y analyzing powers (and, possibly, vector polarization transfer coefficient C y y ) in inclusive deuteron breakup, A(d, p)X, at large transverse proton momenta [9,10,11,12,13] at the highest available energy at Nuclotron; of the tensor A yy and vector A y analyzing powers [50,51,52] (and, possibly, vector polarization transfer coefficient C y y [53]) in the inelastic deuteron scattering, A(d, d )X, in the vicinity of the baryonic resonances excitation; of the tensor A yy and vector A y analyzing powers in the inclusive pion production, A(d, π − )X, [54] also at the highest available energy at Nuclotron. The measurements of the analyzing powers in inclusive deuteron breakup and the inelastic deuteron scattering in the vicinity of the baryonic resonances excitation can be performed simultaneously.…”

Section: Spin Studies With Extracted Polarized Deuteron Beammentioning

confidence: 99%

“…The spin structure of the np SRCs has been investigated at JINR via the measurements of the tensor analyzing power A yy in deuteron inclusive breakup at different energies in the wide regions of the x F and transverse proton momentum p T [9,10,11,12,13]. The data on the tensor analyzing power A yy obtained in the A(d, p)X reaction at different values of x F ∼0.61, ∼0.67, ∼0.72 and ∼0.78 and plotted as a function of the proton transverse momentum p T are shown in panels a), b), c) and d) in Fig.1, respectively.…”

Section: Introductionmentioning

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: Spin Studies With Extracted Polarized Deuteron Beammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of polarization effects at Nuclotron

Ladygin

Janek

Kurilkin

et al. 2016

J. Phys.: Conf. Ser.

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“…Polarization effects in hadronic reactions in a GeV region Vladimir Ladygin [9,10,11,12,13]. The curves are explained in the text.…”

Section: Pos(baldin Ishepp Xxii)098mentioning

confidence: 99%

“…The spin structure of the np SRCs has been investigated at JINR via the measurements of the tensor analyzing power A yy in deuteron inclusive breakup at different energies in the wide regions of the x F and transverse proton momentum p T [9,10,11,12,13]. The data on the tensor analyzing power A yy obtained in the A(d, p)X reaction at different values of x F ∼0.61, ∼0.67, ∼0.72 and ∼0.78 and plotted as a function of the proton transverse momentum p T are shown in left panels a), b), c) and d) in Fig.1, respectively.…”

Section: Introductionmentioning

confidence: 99%

Polarization effects in hadronic reactions in a GeV region

Ladygin¹

2015

Proceedings of XXII International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXII)

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The major goal of the upgraded Nuclotron facility is to obtain the information on the equation-ofstate for dense nuclear matter playing a key role in the understanding 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 in deuteron induced reactions. 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.

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“…The structure of 3 He can be more complicated and depends on more than one variable as in the case of the deuteron where the strong dependence of the spin structure on two variables was observed [48]. On the other hand, the relativistic effects for the both reaction mechanisms and 3 He structure should be treated in the consistent way.…”

mentioning

confidence: 99%

Analyzing powers Ayy , Axx , Axz and Ay in the dd → 3Hen reaction at 270 MeV

Janek¹,

Saito

Ladygin³

et al. 2007

Eur. Phys. J. A

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Abstract. The data on the tensor Ayy, Axx, Axz and vector Ay analyzing powers in the dd → 3 Hen obtained at T d = 270 MeV in the angular range 0• -110• in the c.m. are presented. The observed negative sign of the tensor analyzing powers Ayy, Axx and Axz at small angles clearly demonstrate the sensitivity to the ratio of the D and S wave component of the 3 He wave function. However, the one-nucleon exchange calculations by using the standard 3 He wave functions have failed to reproduce the strong variation of the tensor analyzing powers as a function of the angle in the c.m.PACS. 24.70.+s Polarization phenomena in reactions -25.10.+s Nuclear reactions involving few-nucleon system -21.45.+v Few-body systems

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Measurement of the tensor analyzing power Ayy in inclusive breakup of 9 GeV/c deuterons on carbon at large transverse momenta of protons

Cited by 22 publications

References 32 publications

Study of polarization effects at Nuclotron

Study of polarization effects at Nuclotron

Polarization effects in hadronic reactions in a GeV region

Analyzing powers Ayy , Axx , Axz and Ay in the dd → 3Hen reaction at 270 MeV

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