Recalibration of the binding energy of hypernuclei measured in emulsion experiments and its implications *

Liu, Peng; Chen, Jinhui; Keane, D.; Xu, Z.; Ma, Yugang

doi:10.1088/1674-1137/43/12/124001

Cited by 13 publications

(4 citation statements)

References 68 publications

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“…For the lightest hypernucleus 3 Λ H, the separation energy of its Λ is very small in early measurements with a typical value of 130 ± 50 KeV [21] but changes to a larger value of 410 ± 120 ± 110 KeV in recent measurements using more precise method [22]. Since this value is significantly smaller than that of normal nuclei with a similar mass number [23], the N Λ N d can also be used as an observable for probing the correlation between baryon and strangeness in relativistic heavy ion collisions.…”

Section: Introductionmentioning

confidence: 93%

Yield ratio of hypertriton to light nuclei in heavy-ion collisions from $\rm \sqrt{s_{NN}}$ = 4.9 GeV to 2.76 TeV

Shao,

Chen,

et al. 2020

Preprint

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We resolve the difference in the yield ratio S 3 = N 3 Λ H /N Λ N 3 He /Np measured in Au+Au collisions at √ s NN = 200 GeV and in Pb-Pb collisions at √ s NN = 2.76 TeV by adopting a different treatment of the weak decay contribution to the proton yield in Au+Au collisions at √ s NN = 200 GeV. We then use the coalescence model to extract information on the Λ and nucleon density fluctuations at the kinetic freeze-out of heavy ion collisions. We also show from available experimental data that the yield ratio S 2 = N 3 Λ HN Λ N d is a more promising observable than S 3 for probing the local baryon-strangeness correlation in the produced medium.

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Section: Introductionmentioning

confidence: 93%

Yield ratio of hypertriton to light nuclei in heavy-ion collisions from $\rm \sqrt{s_{NN}}$ = 4.9 GeV to 2.76 TeV

Shao,

Chen,

et al. 2020

Preprint

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“…To further complicate the situation, there have been attempts to recalibrate earlier Λ values using the current best estimates of the masses of particles and nuclei [2,8]. Such a recalibration would be very significant for light hypernuclei, especially for the hypertriton, where it amounts to approximately 100 keV.…”

Section: Pos(panic2021)201mentioning

confidence: 99%

Preparation of the hypertriton binding energy measurement at MAMI

Eckert¹,

Achenbach²,

Fontboté³

et al. 2022

Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)

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A new experiment is being prepared at the Mainz Microtron (MAMI) to determine the Λ binding energy of hypertriton. The energy will be measured by the spectroscopy of mono-energetic pions from two-body decays of stopped hyperfragments. During the last decade, it has been demonstrated at MAMI that this technique yields an unprecedented precision. The new experiment makes use of a novel high-luminosity target that takes advantage of the low density of lithium to minimize momentum smearing for the outgoing pions. With a beam energy determination by the novel undulator light interference method an improved calibration of the magnetic spectrometers can be performed to reach the goal of a statistical and systematic error of ∼ 20 keV.

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“…Much attention has been paid earlier on topics like the exploration up to limits of the nuclear landscape and searching for the island of stability [16][17][18][19][20][21][22][23]. The terrestrial nuclear reaction experiments provide a large volume of data for thermonuclear reaction rates (mainly on stable targets), based on which many theoretical models have been developed to calculate the binding energy of different nuclides and the cross-sections and reaction rates for different nuclear processes [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. The JINA REACLIB database is a well-known source of thermonuclear reaction rates [43], updated continuously and snapshotted regularly by the JINA Collaboration which aims to compile a complete set of nuclear reaction rates.…”

Section: Introductionmentioning

confidence: 99%

Network structure of thermonuclear reactions in nuclear landscape

Liu

Han

et al. 2020

Sci. China Phys. Mech. Astron.

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Nucleosynthesis is a complex process in astro-nuclear evolution. In this work, we construct a directed multi-layer nuclear reaction network using the substrate-product method from a thermonuclear reaction database, JINA REACLIB. The network contains four layers, namely n-, p-, h-and r, corresponding to the reaction types involved in neutrons, protons, 4 He and the remainder, respectively. The degree values (i.e. numbers of reactions) for three layers of n-, p-and h-have a significant correlation with one another, and their topological structures exhibit a similar regularity. However, the r-layer has a more complex topological structure than others and has less correlation with the other three layers. A software package named 'mfinder' is employed to analyze the motif structure of the nuclear reaction network. We thus identify the most frequent reaction patterns of interconnections occurring among different nuclides. This work provides a novel approach to study the nuclear reaction network prevailing in the astrophysical context.

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Recalibration of the binding energy of hypernuclei measured in emulsion experiments and its implications *

Cited by 13 publications

References 68 publications

Yield ratio of hypertriton to light nuclei in heavy-ion collisions from $\rm \sqrt{s_{NN}}$ = 4.9 GeV to 2.76 TeV

Yield ratio of hypertriton to light nuclei in heavy-ion collisions from $\rm \sqrt{s_{NN}}$ = 4.9 GeV to 2.76 TeV

Preparation of the hypertriton binding energy measurement at MAMI

Network structure of thermonuclear reactions in nuclear landscape

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