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Measurement of the Λ hyperon lifetime

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00579050" target="_blank" >RIV/61389005:_____/23:00579050 - isvavai.cz</a>

  • Alternative codes found

    RIV/68378271:_____/23:00579050 RIV/68407700:21340/23:00372285

  • Result on the web

    <a href="https://doi.org/10.1103/PhysRevD.108.032009" target="_blank" >https://doi.org/10.1103/PhysRevD.108.032009</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1103/PhysRevD.108.032009" target="_blank" >10.1103/PhysRevD.108.032009</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Measurement of the Λ hyperon lifetime

  • Original language description

    A new, more precise measurement of the. hyperon lifetime is performed using a large data sample of Pb-Pb collisions at root s(NN) = 5.02 TeV with ALICE. The Lambda and (Lambda) over bar hyperons are reconstructed at midrapidity using their two-body weak decay channel Lambda -> p + pi(-) and (Lambda) over bar -> (p ) over bar + pi(+). The measured value of the. lifetime is tau(Lambda) = [261.07 +/- 0.37(stat.) +/- 0.72o(syst)]ps. The relative difference between the lifetime of Lambda and (Lambda) over bar, which represents an important test of CPT invariance in the strangeness sector, is also measured. The obtained value (tau(Lambda) - tau((Lambda) over bar))/tau(Lambda) = (0.0013 +/- 0.0028(stat.) +/- 0.0021(syst.) is consistent with zero within the uncertainties. Both measurements of the. hyperon lifetime and of the relative difference between tau(Lambda) and tau((Lambda) over bar) are in agreement with the corresponding world averages of the Particle Data Group and about a factor of three more precise.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10304 - Nuclear physics

Result continuities

  • Project

    <a href="/en/project/LM2018104" target="_blank" >LM2018104: Research Infrastructure for experiments at CERN</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physical Review D

  • ISSN

    2470-0010

  • e-ISSN

    2470-0029

  • Volume of the periodical

    108

  • Issue of the periodical within the volume

    3

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    15

  • Pages from-to

    032009

  • UT code for WoS article

    001090589600002

  • EID of the result in the Scopus database

    2-s2.0-85168848895