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Photon emission in neutral-current interactions at intermediate energies

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Photon emission in neutral-current interactions at intermediate energies

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dc.contributor.author Wang, En
dc.contributor.author Álvarez Ruso, Luis
dc.contributor.author Nieves Pamplona, Juan Miguel
dc.date.accessioned 2014-10-14T12:18:50Z
dc.date.available 2014-10-14T12:18:50Z
dc.date.issued 2014
dc.identifier.citation Wang, En Alvárez Ruso, Luis Nieves Pamplona, Juan Miguel 2014 Photon emission in neutral-current interactions at intermediate energies Physical Review C 89 1 015503
dc.identifier.uri http://hdl.handle.net/10550/39181
dc.description.abstract Neutral-current photon emission reactions with nucleons and nuclei are studied. These processes are important backgrounds for nu(mu) -> nu(e) ((nu) over bar (mu) -> (nu) over bar (e)) appearance oscillation experiments where electromagnetic showers instigated by electrons (positrons) and photons are not distinguishable. At intermediate energies, these reactions are dominated by the weak excitation of the Delta(1232) resonance and its subsequent decay into N gamma. There are also nonresonant contributions that, close to threshold, are fully determined by the effective chiral Lagrangian of strong interactions. In addition, we have also included mechanisms mediated by nucleon excitations (N*) from the second resonance region above the Delta(1232). From these states, the contribution of the D-13 N*(1520) turns out to be sizable for (anti) neutrino energies above 1.5 GeV. We have extended the model to nuclear targets taking into account Pauli blocking, Fermi motion, and the in-medium Delta resonance broadening. We present our predictions for both the incoherent and coherent channels, showing the relevance of the nuclear corrections. We also discuss the target mass dependence of the cross sections. This study is important to reduce systematic effects in neutrino oscillation experiments.
dc.language.iso eng
dc.relation.ispartof Physical Review C, 2014, vol. 89, num. 1, p. 015503
dc.subject Física
dc.title Photon emission in neutral-current interactions at intermediate energies
dc.type journal article es_ES
dc.date.updated 2014-10-14T12:18:50Z
dc.identifier.doi 10.1103/PhysRevC.89.015503
dc.identifier.idgrec 099145
dc.rights.accessRights open access es_ES

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