Tauon

•  Electron

  The electron is a subatomic particle that carries a negative electric charge. It has no known components or substructure, and therefore is believed to be an elementary particle. An electron has a mass that is approximately 1/1836 that of the proton. The intrinsic angular momentum of the electron is a half integer value of ħ, which means that it is a fermion.

  

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•  Muon

  The muon (from the Greek letter mu used to represent it) is an elementary particle similar to the electron, with a negative electric charge and a spin of ⁄2. Together with the electron, the tauon, and the three neutrinos, it is classified as a lepton. It is the unstable subatomic particle with the second longest mean lifetime, behind the neutron.

  

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•  Neutrino

  Neutrinos are elementary particles that often travel close to the speed of light, are electrically neutral, and are able to pass through ordinary matter almost undisturbed and are thus extremely difficult to detect. Neutrinos have a minuscule, but nonzero mass. They are denoted by the Greek letter ν. Neutrinos are created as a result of certain types of radioactive decay or nuclear reactions such as those that take place in the Sun, in nuclear reactors, or when cosmic rays hit atoms.

  

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•  Positron

  The positron or antielectron is the antiparticle or the antimatter counterpart of the electron. The positron has an electric charge of +1, a spin of ⁄2, and the same mass as an electron. When a low-energy positron collides with a low-energy electron, annihilation occurs, resulting in the production of two or more gamma ray photons. Positrons may be generated by positron emission radioactive decay, or by pair production from a sufficiently energetic photon.

  

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•  Lepton

  Leptons are a family of elementary particles, alongside quarks and gauge bosons. Like quarks, leptons are fermions and are subject to the electromagnetic force, the gravitational force, and weak interaction, but unlike quarks, leptons do not participate in the strong interaction. There are six flavours of leptons, forming three generations.

  

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•  Antineutrino

  In physics, antineutrinos are the antiparticles of neutrinos, which are neutral particles produced in nuclear beta decay. These are emitted in beta particle emissions, where a neutron turns into a proton. They have a spin of 1/2, and they are part of the lepton family of particles. The antineutrinos observed so far all have right-handed helicity (i.e. only one of the two possible spin states has ever been seen), while the neutrinos are left-handed.

  

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•  Neutrino oscillation

  Neutrino oscillation is a quantum mechanical phenomenon predicted by Bruno Pontecorvo whereby a neutrino created with a specific lepton flavor can later be measured to have a different flavor. The probability of measuring a particular flavor for a neutrino varies periodically as it propagates.

  

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•  Lepton number

  In high energy physics, the lepton number is the number of leptons minus the number of antileptons. In equation form, so all leptons have assigned a value of +1, antileptons −1, and non-leptonic particles 0. Lepton number (sometimes also called lepton charge) is an additive quantum number, which means that its sum is preserved in interactions (as opposed to multiplicative quantum numbers such as parity, where the product is preserved instead).

  

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•  Koide formula

  The Koide formula is an unexplained relation discovered by Yoshio Koide in 1981. It relates the masses of the three charged leptons so well that it predicted the mass of the tauon.

  

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•  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 "colors". Such theory may reproduce the standard model at low energies, and hence quark-lepton symmetry may be realized in nature.

  

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• Leptons by likeorhate

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•  Hotel Attraction

  Hotel Attraction was a proposed project by architect Antoni Gaudí, for a skyscraper in New York City. The project was commissioned in May 1908. Planned at a total height of 360 metres, it was probably unrealistic for its time. Little is known about its origin, and the project remained unknown until 1956, when a report by Joan Matamala i Flotats was published, called "When the New World called Gaudí".

  

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•  Humbert Balsan

  Humbert Balsan (August 21, 1954 – February 10, 2005) was a French film producer and chairman of the European Film Academy. He was renowned for securing financing and distribution for diverse and often challenging films. In February 2005, Balsan was found dead in the offices of his production company, Ognon Pictures, in Paris. He was known to have suffered from depression, and killed himself by hanging.

  

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•  Jean-M.-Vincent Audin

  Jean-M. -Vincent Audin was a French Roman Catholic author, journalist and historian.

  

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•  1993 Epsom Derby

  The 1993 Epsom Derby was a horse race which took place at Epsom Downs on Wednesday June 2, 1993. It was the 214th running of the Derby, and it was won by Commander in Chief. The winner was ridden by Michael Kinane and trained by Henry Cecil. The pre-race favourite Tenby finished tenth.

  

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•  Jhalawan (minor state)

  

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