The onset of Lambda Lambda hypernuclear binding

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00509906" target="_blank" >RIV/61389005:_____/19:00509906 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/19:00334864
Result on the web
<a href="https://doi.org/10.1016/j.physletb.2019.134893" target="_blank" >https://doi.org/10.1016/j.physletb.2019.134893</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2019.134893" target="_blank" >10.1016/j.physletb.2019.134893</a>

Result language
angličtina
Original language name
The onset of Lambda Lambda hypernuclear binding
Original language description
Binding energies of light, A <= 6, Lambda Lambda hypernuclei are calculated using the stochastic variational method in a pionless effective field theory ((sic)pEFT) approach at leading order with the purpose of assessing critically the onset of binding in the strangeness S = -2 hadronic sector. The (sic)EFT input in this sector consists of (i) a Lambda Lambda contact term constrained by the Lambda Lambda scattering length a(Lambda Lambda), using a range of values compatible with Lambda Lambda correlations observed in relativistic heavy ion collisions, and (ii) a Lambda Lambda N contact term constrained by the only available A <= 6 Lambda Lambda hypernucler binding energy datum of He-6(Lambda Lambda). The recently debated neutral three-body and four-body systems (3)(Lambda Lambda)n and (4)(Lambda Lambda)n are found unbound by a wide margin. A relatively large value of vertical bar a(Lambda Lambda)vertical bar greater than or similar to 1.5 fm is needed to bind H-4(Lambda Lambda), thereby questioning its particle stability. In contrast, the particle stability of the A = 5 Lambda Lambda hypernuclear isodoublet H-5(Lambda Lambda)-He-5(Lambda Lambda) is robust, with Lambda separation energy of order 1 MeV.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
<a href="/en/project/GA19-19640S" target="_blank" >GA19-19640S: Study of Hadron Interactions, Production and Bound States</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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