Coulomb effects and charge symmetry breaking for the<i>A=4</i>hypernuclei

Bodmer, A.R.; Usmani, Q. N.

doi:10.1103/physrevc.31.1400

Cited by 64 publications

(96 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The binding energy difference is larger beyond our expectations even after a correction in the change in the Coulomb energy due to core contraction, and it is attributed to the ΛN CSB effect [17,18]. Many theorists have tried to understand the origin of the ΛN CSB for more than 40 years [17][18][19][20][21][22][23], but still it has not fully been understood yet. Recently, the binding energy of 4 Λ H was remeasured by a decayed pion spectroscopy at MAMI to confirm the emulsion measurement [5].…”

Section: Motivation For the Measurement Of 10 λ Bementioning

confidence: 63%

High resolution spectroscopic study ofBeΛ10

Gogami¹,

Chen²,

Kawama³

et al. 2016

Phys. Rev. C

View full text Add to dashboard Cite

A spectroscopy of a 10 Λ Be hypernucleus was carried out at JLab Hall C using the (e, e ′ K + ) reaction. A new magnetic spectrometer system (SPL+HES+HKS), specifically designed for high resolution hypernuclear spectroscopy, was used to obtain an energy spectrum with a resolution of ∼ 0.78 MeV (FWHM). The well-calibrated spectrometer system of the present experiment using p(e, e ′ K + )Λ,Σ 0 reactions allowed us to determine the energy levels, and the binding energy of the ground state peak (mixture of 1 − and 2 − states) was obtained to be B Λ = 8.55 ± 0.07(stat.) ± 0.11(sys.) MeV. The result indicates that the ground state energy is shallower than that of an emulsion study by about 0.5 MeV which provides valuable experimental information on Charge Symmetry Breaking (CSB) effect in the ΛN interaction.

show abstract

Section: Motivation For the Measurement Of 10 λ Bementioning

confidence: 63%

High resolution spectroscopic study ofBeΛ10

Gogami¹,

Chen²,

Kawama³

et al. 2016

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…The systematic uncertainties include variations due to track-wise and pair-wise cuts, the uncertainty in describing the C pΛ correlation function 36 , and the uncertainty from the C ΛΛ measurement. The latter dominates the systematic error of d 0 and f 0 , and it affects d 0 more than it does f 0 because the shape of the CF is sensitive to d 0 , in particular at low k * .…”

Section: 33mentioning

confidence: 99%

Measurement of interaction between antiprotons

Adamczyk

Adkins

Agakishiev

et al. 2015

Nature

View full text Add to dashboard Cite

One of the primary goals of nuclear physics is to understand the force between nucleons, which is a necessary step for understanding the structure of nuclei and how nuclei interact with each other. Rutherford discovered the atomic nucleus in 1911, and the large body of knowledge about the nuclear force since acquired was derived from studies made on nucleons or nuclei. Although antinuclei up to antihelium-4 have been discovered 1 and their masses measured, we have no direct knowledge of the nuclear force between antinucleons. Here, we study antiproton pair correlations among data taken by the STAR experiment 2 at the Relativistic Heavy Ion Collider (RHIC) 3 and show that the force between two antiprotons is attractive. In addition, we report two key parameters that characterize the corresponding strong interaction: namely, the scattering length (f 0 ) and effective range (d 0 ). As direct information on the interaction between two antiprotons, one of the simplest systems of antinucleons, our result provides a fundamental ingredient for understanding the structure of more complex antinuclei and their properties.Although the theory of Quantum Chromodynamics (QCD) provides us with an understanding of the foundation of the nuclear force, this binding interaction in nuclei operates at low energy, where the force is strong and difficult to calculate directly from the theory. For that reason, a common parameterization of the effective interaction between nucleons is based on experimental measurements, and the corresponding parameterization for antinucleons remains undetermined. Ultra-relativistic nuclear collisions produce an energy density similar to that of the Universe microseconds after the Big Bang, and the high energy density creates a favourable environment for antimatter production. The abundantly produced antiprotons provide the opportunity to measure, for the first time, the parameters f 0 and d 0 of the strong nuclear force between antinucleons rather than nucleons.The technique used to probe the antiproton-antiproton interaction involves momentum correlations, and it resembles the space-time correlation technique used in Hanbury-Brown and Twiss (HBT) intensity interferometry. Since its invention for use in astronomy by Robert Hanbury-

show abstract

“…There have been old gamma-ray and emulsion data for these energies, but their energy resolution and statistics are not always good enough from the viewpoint of rigorous theoretical calculations such as Refs. [23][24][25][26][27][28]. Recently, there appeared two experimental measurements based on the modern technology: One is the γ-ray measurement from the transition 4 Λ He(1 + → 0 + ) [29] which offers really new and reliable energies of the doublet states.…”

Section: H(1 + ) Predicted In Photoproductionmentioning

confidence: 99%

Photoproduction of Typical Hypernuclei

Motoba

2017

Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)

View full text Add to dashboard Cite

The recent JLab (e, e ′ K + ) experiments provide nice opportunity to test the DWIA theoretical estimates of cross sections, and in fact the predictions for 12 Λ B have been confirmed. Newly calculated spectra are presented for hypernuclear photoproduction with typical light and heavy targets, discussing wide variety of applications. A sophisticated treatment of using extended wave functions is proposed, where parity-mixing intershell coupling mediated by Λ is naturally taken into account.

show abstract

Coulomb effects and charge symmetry breaking for theA=4hypernuclei

Cited by 64 publications

References 22 publications

High resolution spectroscopic study ofBeΛ10

High resolution spectroscopic study ofBeΛ10

Measurement of interaction between antiprotons

Photoproduction of Typical Hypernuclei

Contact Info

Product

Resources

About