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http://hdl.handle.net/2445/131541
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DC Field | Value | Language |
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dc.contributor.author | Garra Ticó, Jordi | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-04-05T10:31:46Z | - |
dc.date.available | 2019-04-05T10:31:46Z | - |
dc.date.issued | 2008-08-11 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131541 | - |
dc.description.abstract | The properties of the Ξ ( 1530 ) resonance are investigated in the Λ + c → Ξ − π + K + decay process. The data sample was collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e + e − collider operating at center-of-mass energies 10.58 and 10.54 GeV. The corresponding integrated luminosity is approximately 230 fb − 1 . The spin of the Ξ ( 1530 ) is established to be 3 / 2 . The existence of an S -wave amplitude in the Ξ − π + system is inferred, and its interference with the Ξ ( 1530 ) 0 amplitude provides the first clear demonstration of the Breit-Wigner phase motion expected for the Ξ ( 1530 ) . The P 1 ( cos θ Ξ − ) Legendre polynomial moment indicates the presence of a significant S -wave amplitude for Ξ − π + mass values above 1.6 GeV / c 2 , and a dip in the mass distribution at approximately 1.7 GeV / c 2 is interpreted as due to the coherent addition of a Ξ ( 1690 ) 0 contribution to this amplitude. This would imply J P = 1 / 2 − for the Ξ ( 1690 ) . Attempts at fitting the Ξ ( 1530 ) 0 line shape yield unsatisfactory results, and this failure is attributed to interference effects associated with the amplitudes describing the K + π + and/or Ξ − K + systems. | - |
dc.format.extent | 14 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.78.034008 | - |
dc.relation.ispartof | Physical Review D, 2008, vol. 78, num. 3, p. 034008 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.78.034008 | - |
dc.rights | (c) American Physical Society, 2008 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Measurement of the spin of the Ξ(1530) resonance | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 577689 | - |
dc.date.updated | 2019-04-05T10:31:46Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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577689.pdf | 1.19 MB | Adobe PDF | View/Open |
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