Nuclear incoherent photoproduction of π0 and η from 4 to 12 GeV

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorSão Paulo Engineering College-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorCenter of Applied Studies for Nuclear Developments (CEADEN)-
Autor(es): dc.contributorIdaho State University-
Autor(es): dc.contributorRIKEN-
Autor(es): dc.creatorRodrigues, T. E.-
Autor(es): dc.creatorArruda-Neto, J. D.T.-
Autor(es): dc.creatorMesa, J.-
Autor(es): dc.creatorGarcia, C.-
Autor(es): dc.creatorShtejer, K.-
Autor(es): dc.creatorDale, D.-
Autor(es): dc.creatorNakagawa, I.-
Autor(es): dc.creatorCole, P. L.-
Data de aceite: dc.date.accessioned2025-08-21T22:01:57Z-
Data de disponibilização: dc.date.available2025-08-21T22:01:57Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2010-08-20-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevC.82.024608-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226020-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226020-
Descrição: dc.descriptionThe mechanism of incoherent π0 and η photoproduction from complex nuclei is investigated from 4 to 12 GeV with an extended version of the multicollisional Monte Carlo (MCMC) intranuclear cascade model. The calculations take into account the elementary photoproduction amplitudes via a Regge model and the nuclear effects of photon shadowing, Pauli blocking, and meson-nucleus final-state interactions. The results for π0 photoproduction reproduced for the first time the magnitude and energy dependence of the measured rations σγA/σγN for several nuclei (Be, C, Al, Cu, Ag, and Pb) from a Cornell experiment. The results for η photoproduction fitted the inelastic background in Cornell's yields remarkably well, which is clearly not isotropic as previously considered in Cornell's analysis. With this constraint for the background, the η→γγ decay width was extracted using the Primakoff method, combining Be and Cu data [Γη→γ γ=0.476(62) keV] and using Be data only [Γη→γγ= 0.512(90) keV]; where the errors are only statistical. These results are in sharp contrast (~50-60%) with the value reported by the Cornell group [Γη→γγ=0.324(46) keV] and in line with the Particle Data Group average of 0.510(26) keV. © 2010 The American Physical Society.-
Descrição: dc.descriptionPhysics Institute University of São Paulo, P.O. Box 66318, CEP 05315-970, São Paulo-
Descrição: dc.descriptionFESP São Paulo Engineering College, São Paulo-
Descrição: dc.descriptionDepartment of Physics and Biophysics UNESP, Botucatu-
Descrição: dc.descriptionCenter of Applied Studies for Nuclear Developments (CEADEN), Havana-
Descrição: dc.descriptionDepartment of Physics Idaho State University, Pocatello, ID 83209-
Descrição: dc.descriptionRIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198-
Descrição: dc.descriptionDepartment of Physics and Biophysics UNESP, Botucatu-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review C - Nuclear Physics-
???dc.source???: dc.sourceScopus-
Título: dc.titleNuclear incoherent photoproduction of π0 and η from 4 to 12 GeV-
Tipo de arquivo: dc.typelivro digital-
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