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Sumit Basu (Lund University)

Sumit Basu

Postdoctoral Researcher

Sumit Basu (Lund University)

Measurement of the Lifetime and Λ Separation Energy of HΛ3

Author

  • S. Acharya
  • S. Basu
  • P. Christiansen
  • O. Matonoha
  • A.F. Nassirpour
  • A. Ohlson
  • A. Oskarsson
  • T. Richert
  • O.V. Rueda
  • D. Silvermyr
  • J. Staa
  • N. Zurlo
Show all

Summary, in English

The most precise measurements to date of the HΛ3 lifetime τ and Λ separation energy BΛ are obtained using the data sample of Pb-Pb collisions at sNN=5.02 TeV collected by ALICE at the LHC. The HΛ3 is reconstructed via its charged two-body mesonic decay channel (HΛ3→He3+π- and the charge-conjugate process). The measured values τ=[253±11(stat)±6(syst)] ps and BΛ=[102±63(stat)±67(syst)] keV are compatible with predictions from effective field theories and confirm that the HΛ3 structure is consistent with a weakly bound system. © 2023 CERN.

Department/s

  • Particle and nuclear physics

Publishing year

2023

Language

English

Publication/Series

Physical Review Letters

Volume

131

Issue

10

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Keywords

  • Binary alloys
  • Nitrogen compounds
  • Charge conjugate
  • Data sample
  • Decay channels
  • Effective field theory
  • Measured values
  • Measurements of
  • Pb-Pb collisions
  • Precise measurements
  • Separation energy
  • Tellurium compounds

Status

Published

ISBN/ISSN/Other

  • ISSN: 0031-9007