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Flavour-changing neutral current Flavour changing neutral current Flavor-changing neutral current
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Flavour changing neutral currents (englisch für Flavour verändernde neutrale Ströme), kurz FCNC, sind ein Phänomen der Elementarteilchenphysik, bei dem sich Quarks oder Leptonen verschiedener Generationen mit der gleichen elektrischen Ladung unter Aussendung eines elektrisch neutralen Eichbosons ineinander umwandeln können. Im Standardmodell treten im Rahmen der schwachen Wechselwirkung dagegen auf: * nicht Flavour verändernde neutrale Ströme * Flavour verändernde geladene Ströme. Nella fisica delle particelle, le correnti neutre con cambiamento di sapore (in inglese flavour-changing neutral current, o FCNC), sono delle interazioni deboli mediate dal bosone Z, neutro, che provocano il cambiamento di sapore di un fermione senza modificarne la carica. Qualora esistessero, potrebbero indurre fenomeni, che tuttavia non sono ancora stati osservate dagli esperimenti. Nel Modello Standard le FCNC sono ordini superiori, fortemente soppresse dal meccanismo GIM. In particle physics, flavor-changing neutral currents or flavour-changing neutral currents (FCNCs) are hypothetical interactions that change the flavor of a fermion without altering its electric charge.
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Flavour changing neutral currents (englisch für Flavour verändernde neutrale Ströme), kurz FCNC, sind ein Phänomen der Elementarteilchenphysik, bei dem sich Quarks oder Leptonen verschiedener Generationen mit der gleichen elektrischen Ladung unter Aussendung eines elektrisch neutralen Eichbosons ineinander umwandeln können. FCNC existieren nicht als fundamentale Wechselwirkung im Standardmodell der Elementarteilchenphysik; sie treten nur in Diagrammen höherer Ordnung auf und sind daher stark unterdrückt. Einige Theorien jenseits des Standardmodells sagen neue Wechselwirkungen voraus, die fundamentale FCNC erlauben. Im Standardmodell treten im Rahmen der schwachen Wechselwirkung dagegen auf: * nicht Flavour verändernde neutrale Ströme * Flavour verändernde geladene Ströme. In particle physics, flavor-changing neutral currents or flavour-changing neutral currents (FCNCs) are hypothetical interactions that change the flavor of a fermion without altering its electric charge. Nella fisica delle particelle, le correnti neutre con cambiamento di sapore (in inglese flavour-changing neutral current, o FCNC), sono delle interazioni deboli mediate dal bosone Z, neutro, che provocano il cambiamento di sapore di un fermione senza modificarne la carica. Qualora esistessero, potrebbero indurre fenomeni, che tuttavia non sono ancora stati osservate dagli esperimenti. Nel Modello Standard le FCNC sono ordini superiori, fortemente soppresse dal meccanismo GIM.
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