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1826214625674264576
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MIT
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A determination of the spin and parity of the Λ(1405) is presented using photoproduction data from the CLAS detector at Jefferson Lab. The reaction γ+p→K++Λ(1405) is analyzed in the decay channel Λ(1405)→Σ++π-, where the decay distribution to Σ+π- and the variation of the Σ+ polarization with respect to the Λ(1405) polarization direction determines the parity. The Λ(1405) is produced, in the energy range 2.55<W<2.85 GeV and for 0.6<cosθK+c.m.<0.9, with polarization P=0.45±0.02(stat) ±0.07(syst). The analysis shows that the decays are in S wave, with the Σ+ polarized such that the Λ(1405) has spin-parity JP=12-, as expected by most theories. © 2014 American Physical Society.
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2024-09-23T16:08:28Z
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Article
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mit-1721.1/134243
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Massachusetts Institute of Technology
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| language |
English
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2024-09-23T16:08:28Z
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2021
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| publisher |
American Physical Society (APS)
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dspace
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mit-1721.1/1342432022-04-01T17:47:10Z Spin and parity measurement of the Λ(1405) baryon A determination of the spin and parity of the Λ(1405) is presented using photoproduction data from the CLAS detector at Jefferson Lab. The reaction γ+p→K++Λ(1405) is analyzed in the decay channel Λ(1405)→Σ++π-, where the decay distribution to Σ+π- and the variation of the Σ+ polarization with respect to the Λ(1405) polarization direction determines the parity. The Λ(1405) is produced, in the energy range 2.55<W<2.85 GeV and for 0.6<cosθK+c.m.<0.9, with polarization P=0.45±0.02(stat) ±0.07(syst). The analysis shows that the decays are in S wave, with the Σ+ polarized such that the Λ(1405) has spin-parity JP=12-, as expected by most theories. © 2014 American Physical Society. 2021-10-27T20:04:09Z 2021-10-27T20:04:09Z 2014 2021-04-05T15:41:21Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134243 en 10.1103/PHYSREVLETT.112.082004 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS
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| spellingShingle |
Spin and parity measurement of the Λ(1405) baryon
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| title |
Spin and parity measurement of the Λ(1405) baryon
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| title_full |
Spin and parity measurement of the Λ(1405) baryon
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| title_fullStr |
Spin and parity measurement of the Λ(1405) baryon
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| title_full_unstemmed |
Spin and parity measurement of the Λ(1405) baryon
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| title_short |
Spin and parity measurement of the Λ(1405) baryon
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| title_sort |
spin and parity measurement of the λ 1405 baryon
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| url |
https://hdl.handle.net/1721.1/134243
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