Misc. First direct high-precision measurement of the proton’s magnetic moment sets the stage for BASE cerncourier/cws/article/cern/57839 First combination of Tevatron and LHC measurements of the top-quark mass arxiv.org/abs/1403.4427 Not Only Top: Bottom Asymmetry Measured By CDF! science20/a_quantum_diaries_survivor/not_only_top_bottom_asymmetry_measured_by_cdf-139542 www-cdf.fnal.gov/physics/new/top/2014/Afbbpub/index.html dispatchesfromturtleisland.blogspot/2014/01/a-new-precision-estimate-of-bottom.html news.cornell.edu/stories/2010/05/masses-common-quarks-are-revealed First-time observation of photon polarization emitted in the weak decay of a bottom quark phys.org/news/2014-03-first-time-photon-polarization-emitted-weak.html Precision measurement of Higgs decay branching ratios to bottom quarks and gluons at the ILC arxiv.org/abs/1003.1333 Precise charm-quark mass from deep-inelastic scattering arxiv.org/abs/1212.2355 The strange quark mass and Lambda parameter of two flavor QCD arxiv.org/abs/1205.5380 Electrons shapeliness throws a curve at supersymmetry news.yale.edu/2013/12/19/electrons-shapeliness-throws-curve-supersymmetry Experiment with speeding ions verifies relativistic time dilation to new level of precision phys.org/news/2014-09-ions-relativistic-dilation-precision.html Relativity Paradox - Sixty Symbols youtu.be/kGsbBw1I0Rg Stephen Hawking - Time Traveling Particles youtu.be/RB3csddgux8 As a by-product of this same view, I received a telephone call one day at the graduate college at Princeton from Professor Wheeler, in which he said, Feynman, I know why all electrons have the same charge and the same mass Why? Because, they are all the same electron! And, then he explained on the telephone, suppose that the world lines which we were ordinarily considering before in time and space - instead of only going up in time were a tremendous knot, and then, when we cut through the knot, by the plane corresponding to a fixed time, we would see many, many world lines and that would represent many electrons, except for one thing. If in one section this is an ordinary electron world line, in the section in which it reversed itself and is coming back from the future we have the wrong sign to the proper time - to the proper four velocities - and thats equivalent to changing the sign of the charge, and, therefore, that part of a path would act like a positron. But, Professor, I said, there arent as many positrons as electrons. Well, maybe they are hidden in the protons or something, he said. I did not take the idea that all the electrons were the same one from him as seriously as I took the observation that positrons could simply be represented as electrons going from the future to the past in a back section of their world lines. That, I stole! And thus the Feynman Electron Diagram was born. moderndragons.blogspot/2008/04/john-wheeler.html Quantum Computer Running singularity youtu.be/pzFTXYJ2J1I Multiverse: One Universe or Many - World Science Festival 2013 youtu.be/2Qt-eGKa34M The Pauli exclusion principle is the quantum mechanical principle that says that two identical fermions (particles with half-integer spin) cannot occupy the same quantum state simultaneously. In the case of electrons, it can be stated as follows: it is impossible for two electrons of a poly-electron atom to have the same values of the four quantum numbers (n, ℓ, mℓ and ms). For two electrons residing in the same orbital, n, ℓ, and mℓ are the same, so ms must be different and the electrons have opposite spins. This principle was formulated by Austrian physicist Wolfgang Pauli in 1925. A more rigorous statement is that the total wave function for two identical fermions is anti-symmetric with respect to exchange of the particles. This means that the wave function changes its sign if the space and spin co-ordinates of any two particles are interchanged. Integer spin particles, bosons, are not subject to the Pauli exclusion principle: any number of identical bosons can occupy the same quantum state, as with, for instance, photons produced by a laser and Bose–Einstein condensate. en.wikipedia.org/wiki/Pauli_exclusion_principle hyperphysics.phy-astr.gsu.edu/hbase/pauli.html
Posted on: Mon, 22 Sep 2014 18:21:05 +0000
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