Miércoles, 04 Junio 2014 14:07

Primera observación directa de un salto cuántico en el espín de un protón Destacado

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Sin embargo, detectar el espín del protón no es una tarea fácil. Aunque los momentos magnéticos del electrón y su antipartícula, el positrón, ya fueron medidos y comparados en la década de 1980, con el protón eso es mucho más problemático porque su momento magnético es 660 veces más pequeño que el del electrón, lo cual significa que es considerablemente más difícil de detectar.

Un equipo de la Universidad Johannes Gutenberg y el Instituto Helmholtz, ambos en Maguncia, el Instituto Max Planck para la Física Nuclear en Heidelberg, y el Centro Helmholtz para la Investigación de Iones Pesados en Darmstadt, todas estas instituciones en Alemania, ha conseguido por vez primera observar saltos cuánticos en el espín de un protón individual, aislado y confinado.

El resultado es un gran paso adelante en el esfuerzo por medir directamente y con alta precisión las propiedades magnéticas del protón.

El principio de medición se basa en la observación de un protón individual almacenado en una trampa magnética para partículas. Como también sería posible observar un antiprotón usando el mismo método, esto significa que hay un modo viable de hallar una explicación para el desequilibrio entre materia y antimateria que presenta el universo actual.

Aquí se confinó el protón individual. (Foto: Holger Kracke)Es crucial poder analizar en detalle la antimateria para poder averiguar por qué la materia y ella no se aniquilaron entre sí por completo poco después del Big Bang. En otras palabras, se trata de averiguar cómo surgió el universo hecho de materia, y no de antimateria, que hoy conocemos.

En la investigación han trabajado, entre otros, Stefan Ulmer y Jochen Walz.

Visto 14104 veces Modificado por última vez en Miércoles, 04 Junio 2014 14:10

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