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Trimaximal mixing

Trimaximal mixing (also known as threefold maximal mixing) refers to the highly symmetric, maximally CP-violating, fermion mixing configuration, characterised by a unitary matrix having all its elemen

Tau (particle)

The tau (τ), also called the tau lepton, tau particle, tauon or tau electron, is an elementary particle similar to the electron, with negative electric charge and a spin of 1/2. Like the electron, the

Lepton number

In particle physics, lepton number (historically also called lepton charge)is a conserved quantum number representing the difference between the number of leptons and the number of antileptons in an e

Lepton

In particle physics, a lepton is an elementary particle of half-integer spin (spin 1⁄2) that does not undergo strong interactions. Two main classes of leptons exist: charged leptons (also known as the

Muon

A muon (/ˈmjuːɒn/ MYOO-on; from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with an electric charge of −1 e and a spin of 1⁄2, but with a much grea

Muon neutrino

The muon neutrino is an elementary particle which has the symbol (νμ) and zero electric charge. Together with the muon it forms the second generation of leptons, hence the name muon neutrino. It was d

Pontecorvo–Maki–Nakagawa–Sakata matrix

In particle physics, the Pontecorvo–Maki–Nakagawa–Sakata matrix (PMNS matrix), Maki–Nakagawa–Sakata matrix (MNS matrix), lepton mixing matrix, or neutrino mixing matrix is a unitarymixing matrix which

Electron neutrino

The electron neutrino (νe) is an elementary particle which has zero electric charge and a spin of 1⁄2. Together with the electron, it forms the first generation of leptons, hence the name electron neu

Electron

The electron (e− or β−) is a subatomic particle with a negative one elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be

Neutrino

A neutrino (/njuːˈtriːnoʊ/ new-TREE-noh; denoted by the Greek letter ν) is a fermion (an elementary particle with spin of 1/2) that interacts only via the weak interaction and gravity. The neutrino is

Bimaximal mixing

Bimaximal mixing refers to a proposed form of the lepton mixing matrix. It is characterized by the neutrino being a bimaximal mixture of and and being completely decoupled from the , i.e. a uniform mi

Tribimaximal mixing

Tribimaximal mixing is a specific postulated form for the Pontecorvo–Maki–Nakagawa–Sakata (PMNS) lepton mixing matrix U. Tribimaximal mixing is defined by a particular choice of the matrix of moduli-s

Koide formula

The Koide formula is an unexplained empirical equation discovered by Yoshio Koide in 1981. In its original form, it relates the masses of the three charged leptons; later authors have extended the rel

Quark–lepton complementarity

The quark–lepton complementarity (QLC) is a possible fundamental symmetry between quarks and leptons. First proposed in 1990 by Foot and Lew, it assumes that leptons as well as quarks come in three "c

Tau neutrino

The tau neutrino or tauon neutrino is an elementary particle which has the symbol ντ and zero electric charge. Together with the tau (τ), it forms the third generation of leptons, hence the name tau n

Positron

The positron or antielectron is the antiparticle or the antimatter counterpart of the electron. It has an electric charge of +1 e, a spin of 1/2 (the same as the electron), and the same mass as an ele

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