Εξίσωση Majorana

Επιστήμες
Επιστημονικός Νόμος
Επιστημονικοί Νόμοι
Μαθηματικό Θεώρημα
Νόμοι Μαθηματικών
Φυσικός Νόμος
Νόμοι Φυσικής
Νόμοι Χημείας
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Φυσικοί Γης
Επιστημονικοί Κλάδοι Φυσικής
Νόμοι Φυσικής
Θεωρίες Φυσικής
Πειράματα Φυσικής
Παράδοξα Φυσικής
- Ακριβέστερα, είναι ένας νόμος της Κβαντικής Πεδιακής Θεωρίας.
Ετυμολογία[]
Η ονομασία "Majorana" σχετίζεται ετυμολογικά με την όνομα του φυσικού "Ettore Majorana".
Εισαγωγή[]
The Majorana equation is a relativistic wave equation similar to the Dirac equation but includes the charge conjugate ψc of a spinor ψ. It is named after the Italian physicist Ettore Majorana, and it is
with the derivative operator written in Feynman slash notation to include the gamma matrices as well as a summation over the spinor components. In this equation ψc is the charge conjugate of ψ, which can be defined in the Majorana basis as
Equation (1) can alternatively be expressed as
- .
In either case, the quantity m
in the equation is called the Majorana mass.
The appearance of both ψ and ψc in the Majorana equation means that the field ψ cannot be coupled to an electromagnetic field without violating charge conservation, so ψ is taken to be neutrally charged. Nonetheless, the quanta of the Majorana equation given here are two particle species, a neutral particle and its neutral antiparticle. The Majorana equation is frequently supplemented by the condition that ψ = ψc (in which case one says that ψ is a Majorana spinor); this results in a single neutral particle. For a Majorana spinor, the Majorana equation is equivalent to the Dirac equation.
Particles corresponding to Majorana spinors are aptly called Majorana particles. Such a particle is its own antiparticle. Thus far, of all the fermions included in the Standard Model, none is described as a Majorana fermion. However, there is the possibility that the neutrino is of a Majorana nature. If so, neutrinoless double-beta decay, as well as a range of lepton-number violating meson and charged lepton decays, are possible. A number of experiments probing if the neutrino is a Majorana particle are currently underway.[1]
Υποσημειώσεις[]
- ↑ A. Franklin, Are There Really Neutrinos?: An Evidential History (Westview Press, 2004), p. 186
Εσωτερική Αρθρογραφία[]
- Κβαντική Φυσική
- Κβαντική Μηχανική
- Κβαντοθεωρία
- Κβαντικός Αριθμός
- Principal Quantum Number
- Azimuthal Quantum Number
- Magnetic Quantum Number
- Spin Quantum Number
- Εξίσωση Dirac
- Εξίσωση Schrodinger
Βιβλιογραφία[]
Ιστογραφία[]
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