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dc.date.accessioned 2020-06-30T16:17:25Z
dc.date.available 2020-06-30T16:17:25Z
dc.date.issued 2017-03
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/99533
dc.description.abstract We evaluate the total cross section for the π-photoproduction process and analyze the behavior of the Δ(1232) resonance contribution when the photon energy is increased from threshold up to 0.7 GeV. Within this energy range we compare two different parameterizations for the γNΔ vertex: the normal parity and the covariant multipole decomposition ones. For completeness, we also compare different versions for the Δ propagator: the first is the dressed propagator obtained including one-loop self-energy contributions (EXACT), the second is the complex mass scheme which consists in replacing mΔ → mΔ - iΩΔ/2 in the bare propagator, and the third is an intermediate approximation between the two previous ones (EXCMS). We conclude that, in order to extend the present calculation to include more energetic resonances in the future and to obtain non-divergent results for the total cross section we will need to use the MD parametrization and the EXCMS propagator. en
dc.format.extent 1-12 es
dc.language en es
dc.subject Effective lagrangian approach es
dc.subject Resonances es
dc.subject π-photoproduction es
dc.title Different vertex parameterizations and propagators for the Δ contribution in π-photoproduction en
dc.type Articulo es
sedici.identifier.uri https://ri.conicet.gov.ar/11336/54410 es
sedici.identifier.uri http://iopscience.iop.org/article/10.1088/1361-6471/aa5eec/meta es
sedici.identifier.other https://dx.doi.org/10.1088/1361-6471/aa5eec es
sedici.identifier.other hdl:11336/54410 es
sedici.identifier.issn 0954-3899 es
sedici.creator.person Quirós, J .J. es
sedici.creator.person Barbero, César Alberto es
sedici.creator.person Jaramillo, D. E. es
sedici.creator.person Mariano, Alejandro Edgardo es
sedici.subject.materias Física es
sedici.description.fulltext true es
mods.originInfo.place Instituto de Física La Plata es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Journal Of Physics G: Nuclear And Particle Physics es
sedici.relation.journalVolumeAndIssue vol. 44, no. 4 es


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Excepto donde se diga explícitamente, este item se publica bajo la siguiente licencia Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)