Tau longitudinal and transverse polarizations from visible kinematics in (anti-)neutrino nucleus scattering

dc.contributor.authorHernández, Eliecer
dc.contributor.authorNieves, Juan
dc.contributor.authorSánchez, Federico
dc.contributor.authorSobczyk, Joanna E.
dc.date.accessioned2023-04-17T08:37:01Z
dc.date.available2023-04-17T08:37:01Z
dc.date.issued2022
dc.description.abstractSince the ντ (ν¯τ )AZ → τ ∓ X reaction is notoriously difficult to be directly measured, the information on the dynamics of this nuclear process should be extracted from the analysis of the energy and angular distributions of the tau decay visible products. These distributions depend, in addition to d 2σ/(dEτ d cos θτ ), on the components of the tau-polarization vector. We give, for the first time, the general expression for the outgoing hadron (pion or rho meson) energy and angular differential cross section for the sequential ντ AZ → τ −(π−ντ ,ρ−ντ )X and ν¯τ AZ → τ +(π+ν¯τ ,ρ+ν¯τ )X reactions. Though all possible nuclear reaction mechanisms contribute to the distribution, it may be possible to isolate/enhance one of them by implementing appropriate selection criteria. For the case of the quasielastic reaction off oxygen and neutrino energies below 6 GeV, we show that the pion distributions are quite sensitive to the details of the tau-polarization components. We find significant differences between the full calculation, where the longitudinal and transverse components of the tau polarization vector vary with the energy and the scattering angle of the produced tau, and the simplified scheme in which the polarizations are set to one and zero, being the latter their respective asymptotic values reached in the high energy regime. In addition to its potential impact on neutrino oscillation analyses, this result can be used to further test different nuclear models, since these observables provide complementary information to that obtained by means of the inclusive nuclear weak charged-current differential cross section. We also study the effects on the cross section of the W4 and W5 nuclear structure functions, which contributions are proportional to the charged lepton mass, and therefore difficult to constrain in muon and electron neutrino experiments.en_GB
dc.identifier.doihttp://doi.org/10.25358/openscience-8915
dc.identifier.urihttps://openscience.ub.uni-mainz.de/handle/20.500.12030/8931
dc.language.isoengde
dc.rightsCC-BY-4.0*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subject.ddc530 Physikde_DE
dc.subject.ddc530 Physicsen_GB
dc.titleTau longitudinal and transverse polarizations from visible kinematics in (anti-)neutrino nucleus scatteringen_GB
dc.typeZeitschriftenaufsatzde
jgu.journal.titlePhysics letters : Bde
jgu.journal.volume829de
jgu.organisation.departmentFB 08 Physik, Mathematik u. Informatikde
jgu.organisation.nameJohannes Gutenberg-Universität Mainz
jgu.organisation.number7940
jgu.organisation.placeMainz
jgu.organisation.rorhttps://ror.org/023b0x485
jgu.pages.alternative137046de
jgu.publisher.doi10.1016/j.physletb.2022.137046de
jgu.publisher.issn1873-2445de
jgu.publisher.nameElsevierde
jgu.publisher.placeAmsterdamde
jgu.publisher.year2022
jgu.rights.accessrightsopenAccess
jgu.subject.ddccode530de
jgu.subject.dfgNaturwissenschaftende
jgu.type.contenttypeScientific articlede
jgu.type.dinitypeArticleen_GB
jgu.type.resourceTextde
jgu.type.versionPublished versionde

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