Measurement of the Λ hyperon lifetime
(2023) In Physical Review D 108(3).- Abstract
- A new, more precise measurement of the Λ hyperon lifetime is performed using a large data sample of Pb-Pb collisions at sNN=5.02 TeV with ALICE. The Λ and Λ¯ hyperons are reconstructed at midrapidity using their two-body weak decay channel Λ→p+π- and Λ¯→p¯+π+. The measured value of the Λ lifetime is τΛ=[261.07±0.37(stat.)±0.72(syst.)] ps. The relative difference between the lifetime of Λ and Λ¯, which represents an important test of CPT invariance in the strangeness sector, is also measured. The obtained value (τΛ-τΛ¯)/τΛ=0.0013±0.0028(stat.)±0.0021(syst.) is consistent with zero within the uncertainties. Both measurements of the Λ hyperon lifetime and of the relative difference between τΛ and τΛ¯ are in agreement with the corresponding... (More)
- A new, more precise measurement of the Λ hyperon lifetime is performed using a large data sample of Pb-Pb collisions at sNN=5.02 TeV with ALICE. The Λ and Λ¯ hyperons are reconstructed at midrapidity using their two-body weak decay channel Λ→p+π- and Λ¯→p¯+π+. The measured value of the Λ lifetime is τΛ=[261.07±0.37(stat.)±0.72(syst.)] ps. The relative difference between the lifetime of Λ and Λ¯, which represents an important test of CPT invariance in the strangeness sector, is also measured. The obtained value (τΛ-τΛ¯)/τΛ=0.0013±0.0028(stat.)±0.0021(syst.) is consistent with zero within the uncertainties. Both measurements of the Λ hyperon lifetime and of the relative difference between τΛ and τΛ¯ are in agreement with the corresponding world averages of the Particle Data Group and about a factor of three more precise. © 2023 CERN. (Less)
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https://lup.lub.lu.se/record/00d2006f-72a9-4c0f-ae69-fd71a690efa2
- author
- Acharya, S. ; Basu, S. LU ; Christiansen, P. LU ; Matonoha, O. LU ; Nassirpour, A.F. LU ; Ohlson, A. LU ; Silvermyr, D. LU ; Staa, J. LU ; Vislavicius, V. LU and Zurlo, N.
- author collaboration
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review D
- volume
- 108
- issue
- 3
- article number
- 032009
- publisher
- American Physical Society
- external identifiers
-
- scopus:85168848895
- ISSN
- 2470-0010
- DOI
- 10.1103/PhysRevD.108.032009
- language
- English
- LU publication?
- yes
- id
- 00d2006f-72a9-4c0f-ae69-fd71a690efa2
- date added to LUP
- 2023-12-20 14:37:44
- date last changed
- 2023-12-20 14:38:01
@article{00d2006f-72a9-4c0f-ae69-fd71a690efa2, abstract = {{A new, more precise measurement of the Λ hyperon lifetime is performed using a large data sample of Pb-Pb collisions at sNN=5.02 TeV with ALICE. The Λ and Λ¯ hyperons are reconstructed at midrapidity using their two-body weak decay channel Λ→p+π- and Λ¯→p¯+π+. The measured value of the Λ lifetime is τΛ=[261.07±0.37(stat.)±0.72(syst.)] ps. The relative difference between the lifetime of Λ and Λ¯, which represents an important test of CPT invariance in the strangeness sector, is also measured. The obtained value (τΛ-τΛ¯)/τΛ=0.0013±0.0028(stat.)±0.0021(syst.) is consistent with zero within the uncertainties. Both measurements of the Λ hyperon lifetime and of the relative difference between τΛ and τΛ¯ are in agreement with the corresponding world averages of the Particle Data Group and about a factor of three more precise. © 2023 CERN.}}, author = {{Acharya, S. and Basu, S. and Christiansen, P. and Matonoha, O. and Nassirpour, A.F. and Ohlson, A. and Silvermyr, D. and Staa, J. and Vislavicius, V. and Zurlo, N.}}, issn = {{2470-0010}}, language = {{eng}}, number = {{3}}, publisher = {{American Physical Society}}, series = {{Physical Review D}}, title = {{Measurement of the Λ hyperon lifetime}}, url = {{http://dx.doi.org/10.1103/PhysRevD.108.032009}}, doi = {{10.1103/PhysRevD.108.032009}}, volume = {{108}}, year = {{2023}}, }