Prospects for discovering supersymmetric long-lived particles with MoEDAL.

We present a study on the possibility of searching for long-lived supersymmetric partners with the MoEDAL experiment at the LHC. MoEDAL is sensitive to highly ionising objects such as magnetic monopoles or massive (meta)stable electrically charged particles. We focus on prospects of directly detecting long-lived sleptons in a phenomenologically realistic model which involves an intermediate neutral long-lived particle in the decay chain. This scenario is not yet excluded by the current data from ATLAS or CMS, and is compatible with astrophysical constraints. Using Monte Carlo simulation, we compare the sensitivities of MoEDAL versus ATLAS in scenarios where MoEDAL could provide discovery reach complementary to ATLAS and CMS, thanks to looser selection criteria combined with the virtual absence of background. It is also interesting to point out that, in such scenarios, in which charged staus are the main long-lived candidates, the relevant mass range for MoEDAL is compatible with a potential role of Supersymmetry in providing an explanation for the anomalous events observed by the ANITA detector.

Migración recurrente del botón de gastrostomía: "síndrome de Buried Bumper" / Recurrent migration of internal bumper gastrostomy: Buried bumper syndrome

Introducción: En la actualidad la gastrostomía ha cambiado el manejo de los niños para el soporte nutricional ambulatorio, así como el soporte nutricional a largo plazo en pacientes con patología crónica. La gastrostomía endoscópica percutánea (GEP) es la técnica de elección hoy en día principalmente por ser segura y porque constituye un procedimiento mínimamente invasivo. Sin embargo, como toda técnica quirúrgica no está libre de complicaciones, siendo una de ellas la migración del botón de gastrostomía en la pared abdominal o gástrica, conocido como Síndrome de Buried Bumper. Caso clínico: Con el fin de ilustrar esta complicación, hasta ahora poco descrita en niños, se presenta el caso de un preescolar a quien se le realizan dos gastrostomías percutáneas por vía endoscópica, en distintos sitios del estómago, complicándose en ambas oportunidades con este síndrome. Conclusión: Creemos que si bien es cierto la PEG puede brindar una serie de ventajas al constituir un acceso seguro a la vía digestiva, ésta es una técnica invasiva, con complicaciones no despreciables desde infección de herida operatoria hasta el Buried Bumper, lo cual hace necesario revisar en detalle cada caso en particular con el fin de no agregar morbilidad a nuestro paciente.

Grand unification of quark and lepton flavor changing neutral currents.

In the context of supersymmetric grand unified theories with soft breaking terms arising at the Planck scale, it is generally possible to link flavor changing neutral current and CP violating processes occurring in the leptonic and hadronic sectors. We study the correlation between flavor changing squark and slepton mass insertions in models à la SU(5). We show that the constraints coming from lepton flavor violation exhibit a strong impact on CP-violating B decays.

CP Violation and Flavor Changing Effects in K and B Mesons from Nonuniversal Soft Breaking Terms.

We analyze CP violation and flavor changing effects in a minimal supersymmetric standard model with arbitrary nonuniversal soft breaking. Large flavor changing neutral current effects are naturally expected in the K system, even in the absence of quark-squark flavor misalignment. However, the B system is sensitive to new supersymmetric contributions only if nonuniversality implies, not only different soft terms for the three generations but also a large quark-squark misalignment. The only exceptions are processes with a leading chirality changing contribution proportional to tanbeta (as b-->sgamma).