Constraints on Ξ− nuclear interactions from capture events in emulsion

E. Friedman; A. Gal

doi:10.1016/j.physletb.2021.136555

Constraints on Ξ⁻ nuclear interactions from capture events in emulsion

E. Friedman, A. Gal^*

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Five Ξ⁻p→ΛΛ two-body capture events in ¹²C and ¹⁴N emulsion nuclei, in which a pair of single-Λ hypernuclei is formed and identified by their weak decay, have been observed in (K⁻,K⁺) emulsion exposures at KEK and J-PARC. Applying a Ξ⁻-nucleus optical potential methodology to study atomic and nuclear transitions, we confirm that these capture events occur from Coulomb assisted 1p_Ξ⁻ nuclear states. Long-range ΞN shell-model correlations are found essential to achieve consistency between the ¹²C and ¹⁴N events. The resulting Ξ-nuclear interaction is strongly attractive, with Ξ potential depth in nuclear matter V_Ξ≳20 MeV. Implications to multi-strangeness features of dense matter are outlined.

Original language	English
Article number	136555
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	820
DOIs	https://doi.org/10.1016/j.physletb.2021.136555
State	Published - 10 Sep 2021

Bibliographical note

Publisher Copyright:
© 2021 The Author(s)

Keywords

Hyperon strong interactions
Ξ atoms and hypernuclei

Access to Document

10.1016/j.physletb.2021.136555

Cite this

@article{a936d159198341b0a514e68e05a1bc37,

title = "Constraints on Ξ− nuclear interactions from capture events in emulsion",

abstract = "Five Ξ−p→ΛΛ two-body capture events in 12C and 14N emulsion nuclei, in which a pair of single-Λ hypernuclei is formed and identified by their weak decay, have been observed in (K−,K+) emulsion exposures at KEK and J-PARC. Applying a Ξ−-nucleus optical potential methodology to study atomic and nuclear transitions, we confirm that these capture events occur from Coulomb assisted 1pΞ− nuclear states. Long-range ΞN shell-model correlations are found essential to achieve consistency between the 12C and 14N events. The resulting Ξ-nuclear interaction is strongly attractive, with Ξ potential depth in nuclear matter VΞ≳20 MeV. Implications to multi-strangeness features of dense matter are outlined.",

keywords = "Hyperon strong interactions, Ξ atoms and hypernuclei",

author = "E. Friedman and A. Gal",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s)",

year = "2021",

month = sep,

day = "10",

doi = "10.1016/j.physletb.2021.136555",

language = "אנגלית",

volume = "820",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Constraints on Ξ− nuclear interactions from capture events in emulsion

AU - Friedman, E.

AU - Gal, A.

PY - 2021/9/10

Y1 - 2021/9/10

N2 - Five Ξ−p→ΛΛ two-body capture events in 12C and 14N emulsion nuclei, in which a pair of single-Λ hypernuclei is formed and identified by their weak decay, have been observed in (K−,K+) emulsion exposures at KEK and J-PARC. Applying a Ξ−-nucleus optical potential methodology to study atomic and nuclear transitions, we confirm that these capture events occur from Coulomb assisted 1pΞ− nuclear states. Long-range ΞN shell-model correlations are found essential to achieve consistency between the 12C and 14N events. The resulting Ξ-nuclear interaction is strongly attractive, with Ξ potential depth in nuclear matter VΞ≳20 MeV. Implications to multi-strangeness features of dense matter are outlined.

AB - Five Ξ−p→ΛΛ two-body capture events in 12C and 14N emulsion nuclei, in which a pair of single-Λ hypernuclei is formed and identified by their weak decay, have been observed in (K−,K+) emulsion exposures at KEK and J-PARC. Applying a Ξ−-nucleus optical potential methodology to study atomic and nuclear transitions, we confirm that these capture events occur from Coulomb assisted 1pΞ− nuclear states. Long-range ΞN shell-model correlations are found essential to achieve consistency between the 12C and 14N events. The resulting Ξ-nuclear interaction is strongly attractive, with Ξ potential depth in nuclear matter VΞ≳20 MeV. Implications to multi-strangeness features of dense matter are outlined.

KW - Hyperon strong interactions

KW - Ξ atoms and hypernuclei

UR - http://www.scopus.com/inward/record.url?scp=85111961902&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2021.136555

DO - 10.1016/j.physletb.2021.136555

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:85111961902

SN - 0370-2693

VL - 820

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 136555

ER -