Measurement of the I = 1/2 Kπ S-Wave Amplitude from Dalitz Plot Analyses of η_c → KK̅π in Two-Photon Interactions

dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)en_US
dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorLees, J. P.en_US
dc.contributor.authorPoireau, V.en_US
dc.contributor.authorTisserand, V.en_US
dc.contributor.authorGrauges, E.en_US
dc.contributor.authorPalano, A.en_US
dc.contributor.authorEigen, G.en_US
dc.contributor.authorBrown, D. N.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBaBar Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.date.accessioned2016-09-23T20:40:25Z
dc.date.available2016-09-23T20:40:25Z
dc.date.created2016-01-20en_US
dc.date.issued2016-01-20en_US
dc.description.abstractWe study the processes γγ→K(S)⁰ K^± π^∓ and γγ→K⁺K⁻π⁰ using a data sample of 519 fb⁻¹ recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e⁺e⁻ collider at center-of-mass energies at and near the Υ(nS) (n=2, 3, 4) resonances. We observe η(c) decays to both final states and perform Dalitz plot analyses using a model-independent partial wave analysis technique. This allows a model-independent measurement of the mass-dependence of the I = 1/2 KπS-wave amplitude and phase. A comparison between the present measurement and those from previous experiments indicates similar behavior for the phase up to a mass of 1.5 GeV/c². In contrast, the amplitudes show very marked differences. The data require the presence of a new a₀(1950) resonance with parameters m=1931 ±14 ± 22 MeV/c² and Γ=271 ± 22 ± 29 MeV.en_US
dc.description.sponsorshipThe work of A. Palano and M. R. Pennington was supported (in part) by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC05-06OR23177en_US
dc.identifier.bibliographicCitationLees, J. P., V. Poireau, V. Tisserand, E. Grauges, et al. 2016. "Measurement of the I=1/2 Kπ S-wave amplitude from Dalitz plot analyses of η_c → KK̅π in two-photon interactions." Physical Review D - Particles, Fields, Gravitation and Cosmology 93(1), doi:10.1103/PhysRevD.93.012005.en_US
dc.identifier.issn1550-7998en_US
dc.identifier.issue1en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5047
dc.identifier.volume93en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevD.93.012005
dc.rights©2016 American Physical Societyen_US
dc.sourcePhysical Review D - Particles, Fields, Gravitation and Cosmology
dc.subjectKaonsen_US
dc.subjectScattering amplitude (Nuclear physics)en_US
dc.subjectMass spectrometryen_US
dc.subjectMesonsen_US
dc.subjectLegendre's polynomialsen_US
dc.subjectDalitz plotsen_US
dc.titleMeasurement of the I = 1/2 Kπ S-Wave Amplitude from Dalitz Plot Analyses of η_c → KK̅π in Two-Photon Interactionsen_US
dc.type.genreArticleen_US

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