Categoría: General
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Families from USp(32)
The same trick to descent to three generations can be done starting from the 495 of Sp(32). We are on it, as usual, in physicsforums https://www.physicsforums.com/threads/the-wrong-turn-of-string-theory-our-world-is-susy-at-low-energies.485247/page-13#post-5913658 As noted there, we still lack of a variant showing the L-R chirality of the SM. I wonder if we could use some exotic models from E6 or E8…
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La cataluña condal: Tabarnia
La idea de que la costa catalana entre los territorios medievales del condado de Barcelona y la taifa de Amposta es partidaria de la union con España parece que ha cundido por twitter despues de las navidades, y generado unas cuantas busquedas en google, asi que por curiosidad he puesto esta entradilla en twitter a…
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haskinator, adivina tu edad…
… si estas censado en cataluña y das las cinco ultimas cifras de tu DNI. Al parecer esta es la unica consecuencia del filtrado de datos censales para el 1 de Octubre. Los datos tienen un hash lento que se construye combinando las 5 ultimas cifras del DNI, la letra, la fecha de nacimiento y…
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wrong turns
Woit (What the Hell is Going On?) and Motl (wrong-turn-basins-gut-critics) have sparked a new round of the discussion on the existence, or not, of a wrong turn in the development of theoretical particle physics. The excuse this time is some comments of Nima Arkani-Hamed in a couple of recent lectures, but the running joke is…
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Families from SO(32)
$latex \begin{array}{llll} 496=\\ {\bf (1,24,1^c) }&+{\bf [1,15,\bar 3^c]}&+{\bf [1, \bar {15}, 3^c]}&+\\ 1,24,8^c&+[1,10,\bar 6^c]&+[1,\bar {10},6^c]&+\\ (1,1,8^c)&&&+\\&(2,5,3^c)&+(2,\bar 5,\bar 3^c)&+\\ &(1,1,1^c)&+[1,1,1^c]\\ \end{array} $ (or from SO(30), or perhaps just O(10)xU(3) or U(5)xU(3)) Point is, the first three lines seem to contain three generations with electric and colour charge. It is possible to break the 24 and 15…