Measurement of the Lifetime and Λ Separation Energy of HΛ3

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; ALICE Collaboration

doi:10.1103/PhysRevLett.131.102302

Measurement of the Lifetime and Λ Separation Energy of HΛ3

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, ALICE Collaboration

Particle and nuclear physics

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

Abstract

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.

Original language	English
Article number	102302
Journal	Physical Review Letters
Volume	131
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.131.102302
Publication status	Published - 2023

Subject classification (UKÄ)

Subatomic Physics

Free 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

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10.1103/PhysRevLett.131.102302Licence: CC BY

Cite this

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title = "Measurement of the Lifetime and Λ Separation Energy of HΛ3",

abstract = "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. {\textcopyright} 2023 CERN.",

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",

author = "S. Acharya and S. Basu and P. Christiansen and O. Matonoha and A.F. Nassirpour and A. Ohlson and A. Oskarsson and T. Richert and O.V. Rueda and D. Silvermyr and J. Staa and N. Zurlo and {ALICE Collaboration}",

year = "2023",

doi = "10.1103/PhysRevLett.131.102302",

language = "English",

volume = "131",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "10",

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TY - JOUR

T1 - Measurement of the Lifetime and Λ Separation Energy of HΛ3

AU - Acharya, S.

AU - Basu, S.

AU - Christiansen, P.

AU - Matonoha, O.

AU - Nassirpour, A.F.

AU - Ohlson, A.

AU - Oskarsson, A.

AU - Richert, T.

AU - Rueda, O.V.

AU - Silvermyr, D.

AU - Staa, J.

AU - Zurlo, N.

AU - ALICE Collaboration

PY - 2023

Y1 - 2023

N2 - 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.

AB - 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.

KW - Binary alloys

KW - Nitrogen compounds

KW - Charge conjugate

KW - Data sample

KW - Decay channels

KW - Effective field theory

KW - Measured values

KW - Measurements of

KW - Pb-Pb collisions

KW - Precise measurements

KW - Separation energy

KW - Tellurium compounds

U2 - 10.1103/PhysRevLett.131.102302

DO - 10.1103/PhysRevLett.131.102302

M3 - Article

C2 - 37739380

SN - 0031-9007

VL - 131

JO - Physical Review Letters

JF - Physical Review Letters

IS - 10

M1 - 102302

ER -

Measurement of the Lifetime and Λ Separation Energy of HΛ3

Abstract

Subject classification (UKÄ)

Free keywords

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