Lifetime of the hypertriton

F. Hildenbrand and H.-W. Hammer
Phys. Rev. C 102, 064002 – Published 8 December 2020

Abstract

We calculate the lifetime of the hypertriton as a function of the Λ separation energy BΛ in an effective field theory with Λ and deuteron degrees of freedom. We also consider the impact of new measurements of the weak decay parameter of the Λ. While the sensitivity of the total width to BΛ is small, the partial widths for decays into individual final states and the experimentally measured ratio R=ΓHe3/ΓHe3+Γpd show a strong dependence. For the standard value BΛ=(0.13±0.05) MeV, we find R=0.37±0.05, which is in good agreement with past experimental studies and theoretical calculations. For the recent STAR value BΛ=(0.41±0.12±0.11) MeV, we obtain R=0.57±0.11.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
2 More
  • Received 24 July 2020
  • Accepted 17 November 2020

DOI:https://doi.org/10.1103/PhysRevC.102.064002

©2020 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

F. Hildenbrand1,* and H.-W. Hammer1,2,†

  • 1Technische Universität Darmstadt, Department of Physics, Institut für Kernphysik, 64289 Darmstadt, Germany
  • 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany

  • *hildenbrand@theorie.ikp.physik.tu-darmstadt.de
  • Hans-Werner.Hammer@physik.tu-darmstadt.de

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 102, Iss. 6 — December 2020

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×