Dibaryon resonances

Makarov, M.M.

doi:10.1070/pu1982v025n02abeh004498

Cited by 10 publications

(12 citation statements)

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“…However, a number of more sensitive polarization characteristics were not reproduced within the framework of conventional meson-exchange models [32,33]. So, it was claimed [24] that excitation of the intermediate dibaryon resonances found in elastic pp scattering [5,9,10] should be taken into account in the NN → dπ process as well.…”

Section: Conventional Description Of the One-pion Production Reactionmentioning

confidence: 99%

Hidden dibaryons in one- and two-pion production in NN collisions

Platonova

Kukulin

2016

Nuclear Physics A

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Processes of one-and two-pion production in NN collisions are considered in connection with excitation of intermediate dibaryon resonances. In particular, relative contributions of the conventional meson-exchange and dibaryon excitation mechanisms in the reaction pp → dπ + are investigated in detail. Inclusion of the intermediate isovector dibaryon resonances is shown to essentially improve the description of experimental data for this reaction, provided the soft meson-baryon form factors consistent with πN elastic scattering are used. Manifestation of the intermediate isoscalar and isovector dibaryons in the two-pion production processes is also studied. The role of the isovector dibaryon resonances in the reaction pp → ppππ is discussed for the first time. An explanation of the observed strong differences between two-pion production cross sections in pn and pp collisions based in part on the analysis of dibaryon structure is suggested.

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Section: Conventional Description Of the One-pion Production Reactionmentioning

confidence: 99%

Hidden dibaryons in one- and two-pion production in NN collisions

Platonova

Kukulin

2016

Nuclear Physics A

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“…Many experiments have been carried out to elucidate the nature of the LT. In the initial stage, nonlinear pressure dependence of superconducting transition temperatures in Tl and Re was explained by the LT [2,3]. Later, several compounds have been assumed to generate pressure-induced LTs, e.g., a crossover for intermetallic alloys like AuIn 2 [4] and metamagnetic transitions in itinerant ferromagnets, UGe 2 and ZrZn 2 [5,6].…”

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confidence: 99%

Discontinuous Lifshitz transition achieved by band-filling control inNaxCoO2

Nishio

Hiroi

2010

Phys. Rev. B

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Precise band-filling control is performed on a strongly correlated electron system Na x CoO 2 , by changing the Na content, and the influence of this on the magnetic and thermodynamic properties is studied. It has been discovered that a phase boundary between a Pauli paramagnetic metal appearing at small x and a Curie-Weiss metal at large x is located within an extremely narrow range of 0.620Ͻ x Ͻ 0.621. The transition between these is a Lifshitz transition of the pocket-vanishing type, exceptionally achieved by band-filling control. Abrupt changes in various properties across the boundary are remarkably observed, suggesting that the Lifshitz transition occurs discontinuously in Na x CoO 2 , differently from the conventional Lifshitz transition defined at T =0.

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“…[1,2]. However, we should remark that not in all cases the resonance behaviour of the cross sections or of the two-nucleon effective mass distributions may be identified as a manifestation of dibaryon resonances [2].…”

Section: Experimental Datamentioning

confidence: 96%