Seeking and investigating isospin-two narrow dibaryon resonances in neutron-proton interactions at P n =5.20±0.13 Gev/c

Troyan, Yu.A.; Pechenov, V.; Plekhanov, E. B.; Troyan, A. Yu.; Arakelyan, S. G.; Moroz, V.I.; Jerusalimov, A. P.

doi:10.1134/1.1312889

Cited by 14 publications

(19 citation statements)

References 12 publications

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“…Since the Θ + has the same quark constituents as the combination of nK + and pK 0 , these two modes are expected as the primary decay channel, and thus are usually used in reconstructions in the experiments. After the first report for the Θ + , the signals were observed by many groups [11,[48][49][50][51][52][53][54][55][56][57][58], and some groups confirmed their results with new data [59][60][61][62][63]. All these results are briefly listed in Table I.…”

supporting

confidence: 74%

“…This does not consist with a narrow resonance. The mass values in LEPS early experiment [11], DIANA experiments [48,[60][61][62], SAPHIR experiment [51] and JINR experiments [55,56] are around 1540 MeV/c 2 , while the values in HERMES experiment [50], SVD early experiment [49], ITEP's analysis on the old neutrino experiments [52,53] and E522 experiment [57] are near 1530 MeV/c 2 . Besides, the LEPS recent experiment [59], the SVD updated experiment [63] and the ZEUS experiment [54] provide even lower mass values close to 1520 MeV/c 2 , and the OBELIX experiment gives a much higher value.…”

Section: Discussionmentioning

confidence: 99%

“…Several resonances in the nK + invariant mass spectrum were reported in a neutron experiment at Joint Institute for Nuclear Research (JINR) [55] through the reaction np → npK + K − . The data were obtained in an exposure of a 1-m H 2 bubble chamber of the Vekster and Baldin Laboratory of High Energies (LHE) at JINR to a quasimonochromatic neutron beam.…”

Section: Jinrmentioning

confidence: 99%

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Present status on experimental search for pentaquarks

Liu

Mao

2014

Int. J. Mod. Phys. A

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It has been ten years since the first report for a positive strangeness pentaquark-like baryon state. However the existence of the pentaquark state is still controversial. Some contradictions between the experiments are unsolved. In this paper we review the experimental search for the pentaquark candidates $\Theta^+$, $\Theta^{++}$, $\Xi^{--}$, $\Theta_c^0$ and $N^*$ in details. We review the experiments with positive results and compare the experiments with similar conditions but opposite results.Comment: 20 latex pages, 2 figures, to appear in IJMPA as a revie

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supporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Jinrmentioning

confidence: 99%

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Present status on experimental search for pentaquarks

Liu

Mao

2014

Int. J. Mod. Phys. A

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“…In particular, Yu.A. Troyan reported the registration of some dibaryons using just this method [17][18][19] It should be, however, noted that most of experimental searches of dibaryons carried out in the past must be exposed to requalification. Let us consider, for example, a paper by B.M.Abramov et al 20 , which is cited sometimes as a convincing argument against one of Yu.A.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

On Excited States of Deuteron Nucleus

Kostenko¹,

Pribiš²

2015

Preprint

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For a long time it was known that deuteron, as a weakly coupled nucleon pair, has no excited states. However, A.M. Baldin et al, commenting results of the first physical experiment with accelerated nuclei at JINR synchrophasotron, assumed as far back as in 1979 that one of peaks in a differential cross-section may arise due to an "excited state of deuterium". We have established that one of the peaks in the cross-section may be explained indeed in this way and corresponds to the dibaryon reported by WASA-at-COSY Collaboration. Another peak in the same region is interpreted most likely by interference of several N * -resonances, and this possibility was also mentioned in the paper by A.M. Baldin et al. Further experimental studies based on modern experimental facilities and more abundant statistics are necessary to verify these observations.

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“…Furthermore, in Ref. [16] Y. A. Troyan and collaborators observe oscillations in π + π − from the reaction np → npπ + π − at P n = 5.20 Gev/c.…”

mentioning

confidence: 97%