Bound H-dibaryon in the flavor SU(3) limit from a full QCD simulation on the lattice

Inoue, Takashi

doi:10.1063/1.3700547

Cited by 178 publications

(348 citation statements)

References 27 publications

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“…All lattice QCD collaborations have found stable NN-dibaryons and dibaryons containing squarks, but quark masses in their calculations are higher than the physical values, see, e.g., [24,25]. Chiral extrapolations of these results to the physical point gave, however, evidences against the existence of such dibaryons, see, e.g., [26].…”

Section: Discussionmentioning

confidence: 99%

Possible observation of phase transitions in nucleon-nucleon systems

Kostenko¹,

Pribish²

2015

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

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A simple condition of deep cooling for observation of phase transitions in compressed fewnucleon systems was recently proposed. Here we have checked it using data obtained in the first physical experiment with accelerated nuclei at JINR synchrophasotron. Our study was inspired by a remark made by A.M. Baldin et al that one of peaks in observed double differential crosssection may arise due to an "excited state of deuterium nucleus". We have established that one of the peaks in the cross-section corresponds indeed to the dibaryon reported by WASA-at-COSY Collaboration. Another peak in the same region may be explained by interference of several usual baryon resonances. Even a more amazing fact has been established in a kinematical regions which were considered till now as a contribution of elastic deuteron-deuteron and nucleon(inside deuteron)-deuteron scattering. More careful calculations have shown that it is not the case. Trying to understand the nature of these peaks we looked over many dibaryons reported by different experimental groups and found that they may be excellently explained in terms of light dibaryons with equidistant mass spectrum observed by Yu.A. Troyan in a very different experiment. A natural explanation of these dibaryons may be given on basis of generalized coherent states discovered by A. Perelomov. These light dibaryons can be an experimental evidence for the pion Bose-Einstein condensate appearance in compressed and cooled nucleon systems. The condensate emerges due to a nonperturbative effect described by Bogoliubov's transformation which produces a pion state beyond the range of the Fock space. It should be also noted that this state of pion field has a mathematical and physical prototype in quantum optics, known there as the squeezed vacuum. Further experimental studies based on modern experimental facilities and more abundant statistics are necessary to verify our conclusions. September 15-20, 2014 JINR, Dubna, Russia * Speaker. . The dashed and dotted curves correspond to approximations of the first two peaks by the Gaussian functions which maxima positions are given in the insertion. XXII International Baldin Seminar on High Energy Physics Problems

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Section: Discussionmentioning

confidence: 99%

Possible observation of phase transitions in nucleon-nucleon systems

Kostenko¹,

Pribish²

2015

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

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“…A small number of LQCD collaborations have been calculating the binding of light nuclei and hypernuclei at unphysical light-quark masses in the isospin limit and without QED [54][55][56][57][58][59][60][61][62][63]. However, it is known that as the atomic number of a nucleus increases, the Coulomb energy increases with the square of its charge, and significantly reduces the binding of large nuclei.…”

Section: Nucleimentioning

confidence: 99%

Finite-volume electromagnetic corrections to the masses of mesons, baryons, and nuclei

2014

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Now that Lattice QCD calculations are beginning to include QED, it is important to better understand how hadronic properties are modified by finite-volume QED effects. They are known to exhibit power-law scaling with volume, in contrast to the exponential behavior of finite-volume strong interaction effects. We use non-relativistic effective field theories describing the low-momentum behavior of hadrons to determine the finite-volume QED corrections to the masses of mesons, baryons and nuclei out to O 1/L 4 in a volume expansion, where L is the spatial extent of the cubic volume. This generalizes the previously determined expansion for mesons, and extends it by two orders in 1/L to include contributions from the charge radius, magnetic moment and polarizabilities of the hadron. We make an observation about direct calculations of the muon g − 2 in a finite volume.

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“…QED plays a critical role in the stability and structure of nuclei, and therefore first principles calculations of nuclear structure require the inclusion of the electromagnetic (EM) interactions among quarks. Due to computational resource limitations, LQCD calculations of nuclei remain at an early stage, with calculations of the binding energies of systems with up to five nucleons and hyperons currently being performed at unphysical light-quark masses [12][13][14][15][16][17][18][19][20][21]. While the time is not yet ripe for the inclusion of QED in nuclear calculations, there are two-body scattering processes that can now be calculated with high accuracy in LQCD and where Coulomb corrections are relevant, for instance π + π + .…”

Section: Introductionmentioning

confidence: 99%

Two-particle elastic scattering in a finite volume including QED

2014

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The presence of long-range interactions violates a condition necessary to relate the energy of two particles in a finite volume to their S-matrix elements in the manner of Lüscher. While in infinite volume, QED contributions to low-energy charged particle scattering must be resummed to all orders in perturbation theory (the Coulomb ladder diagrams), in a finite volume the momentum operator is gapped, allowing for a perturbative treatment. The leading QED corrections to the two-particle finite-volume energy quantization condition below the inelastic threshold, as well as approximate formulas for energy eigenvalues, are obtained. In particular, we focus on two spinless hadrons in the A + 1 irreducible representation of the cubic group, and truncate the strong interactions to the s-wave. These results are necessary for the analysis of Lattice QCD+QED calculations of charged-hadron interactions, and can be straightforwardly generalized to other representations of the cubic group, to hadrons with spin, and to include higher partial waves.

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Bound H-dibaryon in the flavor SU(3) limit from a full QCD simulation on the lattice

Cited by 178 publications

References 27 publications

Possible observation of phase transitions in nucleon-nucleon systems

Possible observation of phase transitions in nucleon-nucleon systems

Finite-volume electromagnetic corrections to the masses of mesons, baryons, and nuclei

Two-particle elastic scattering in a finite volume including QED

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