Antineutrino induced Lambda(1405) production off the proton
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Antineutrino induced Lambda(1405) production off the proton

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Antineutrino induced Lambda(1405) production off the proton

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dc.contributor.author Ren, Xiu-Lei
dc.contributor.author Oset Báguena, Eulogio
dc.contributor.author Álvarez Ruso, Luis
dc.contributor.author Vicente Vacas, Manuel José
dc.date.accessioned 2016-11-16T08:36:48Z
dc.date.available 2016-11-16T08:36:48Z
dc.date.issued 2015
dc.identifier.uri http://hdl.handle.net/10550/55946
dc.description.abstract We have studied the strangeness-changing antineutrino-induced reactions (v) over bar (l)p -> l(+)phi B, with phi B = K(-)p, (K) over bar (0)n, pi(0)Lambda, pi(0)Sigma(0), eta Lambda, eta Sigma(0), pi(+)Sigma(-), pi(-)Sigma(+), K+Xi(-), and K-0 Xi(0), using a chiral unitary approach. These ten coupled channels are allowed to interact strongly, using a kernel derived from the chiral Lagrangians. This interaction generates two Lambda(1405) poles, leading to a clear single peak in the pi Sigma invariant mass distributions. At backward scattering angles in the center-of-mass frame, (nu) over bar (mu)p -> mu(+)pi(0)Sigma(0) is dominated by the Lambda(1405) state at around 1420 MeV while the lighter state becomes relevant as the angle decreases, leading to an asymmetric line shape. In addition, there are substantial differences in the shape of pi Sigma invariant mass distributions for the three charge channels. If observed, these differences would provide valuable information on a claimed isospin I = 1, strangeness S = -1 baryonic state around 1400 MeV. Integrated cross sections have been obtained for the pi Sigma and (K) over barN channels and the impact of unitarization in the results has been investigated. The number of events with Lambda(1405) excitation in (nu) over bar μp collisions in the recent antineutrino run at the Main Injector Experiment for nu-A (MINER nu A) has also been obtained. We find that this reaction channel is relevant enough to be investigated experimentally and to be taken into account in the simulation models of future experiments with antineutrino beams.
dc.language.iso eng
dc.relation.ispartof Physical Review C, 2015, vol. 91, num. 4, p. 045201-1-045201-11
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Ren, Xiu-Lei Oset Báguena, Eulogio Álvarez Ruso, Luis Vicente Vacas, Manuel José 2015 Antineutrino induced Lambda(1405) production off the proton Physical Review C 91 4 045201-1 045201-11
dc.subject Física
dc.title Antineutrino induced Lambda(1405) production off the proton
dc.type info:eu-repo/semantics/article
dc.date.updated 2016-11-16T08:36:48Z
dc.identifier.doi https://doi.org/10.1103/PhysRevC.91.045201
dc.identifier.idgrec 105874

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