Hypertriton lifetime
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00603086" target="_blank" >RIV/61389005:_____/24:00603086 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevC.109.024001" target="_blank" >https://doi.org/10.1103/PhysRevC.109.024001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.109.024001" target="_blank" >10.1103/PhysRevC.109.024001</a>
Alternative languages
Result language
angličtina
Original language name
Hypertriton lifetime
Original language description
Over the last decade, conflicting values of the hypertriton HΛ3 lifetime τ(HΛ3) were extracted from relativistic heavy-ion (RHI) collision experiments, ranging from values compatible with the free-Λ lifetime τΛ - as expected naively for a very weakly bound Λ in HΛ3 - to lifetimes as short as τ(HΛ3)≈(0.4-0.7)τΛ. In a recent work [Phys. Lett. B 811, 135916 (2020)0370-269310.1016/j.physletb.2020.135916] we studied this HΛ3 lifetime puzzle theoretically using realistic three-body HΛ3 and He3 wave functions computed within the ab initio no-core shell model approach with interactions derived from chiral effective field theory to calculate the partial decay rate Γ(HΛ3→He3+π-). Significant but opposing contributions were found from ςNN admixtures in HΛ3 and from π - He3 final-state interaction. In particular, τ(HΛ3) was found to be strongly correlated with the Λ separation energy BΛ in HΛ3, the value of which is rather poorly known experimentally and, in addition, is known to suffer from sizable theoretical uncertainties inherent in the employed nuclear and hypernuclear interaction models. In the present work we find that these uncertainties propagate into τ(HΛ3), and thus limit considerably the theoretical precision of its computed value. Although none of the conflicting RHI measured τ(HΛ3) values can be excluded, but rather can be attributed to a poor knowledge of BΛ, we note the good agreement between the lifetime value τ(HΛ3)=242(28)ps computed at the lowest value BΛ=66keV reached by us and the very recent ALICE measured lifetime value τALICE(HΛ3)=253(11)(6)ps associated with the ALICE measured BΛ value BΛALICE=102(63)(67)keV [S. Acharya (ALICE Collaboration), Phys. Rev. Lett. 131, 102302 (2023)0031-900710.1103/PhysRevLett.131.102302].
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
<a href="/en/project/GA22-14497S" target="_blank" >GA22-14497S: Advancing the frontiers of first-principle modeling of atomic nuclei</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review C
ISSN
2469-9985
e-ISSN
2469-9993
Volume of the periodical
109
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
024001
UT code for WoS article
001381066200001
EID of the result in the Scopus database
2-s2.0-85184822484