The onset of Lambda Lambda hypernuclear binding
Result 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.
Keywords
Light Lambda Lambda hypernucleiLO (sic) pEFTSVM calculations
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/68407700:21340/19:00334864
Result on the web
DOI - Digital Object Identifier
Alternative languages
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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Classification
Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
GA19-19640S: Study of Hadron Interactions, Production and Bound States
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics Letters. B
ISSN
0370-2693
e-ISSN
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Volume of the periodical
797
Issue of the periodical within the volume
10
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
5
Pages from-to
134893
UT code for WoS article
000488071200061
EID of the result in the Scopus database
2-s2.0-85071555018
Basic information
Result type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
OECD FORD
Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Year of implementation
2019