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002026424 005__ 20240626122821.0
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002026424 041__ $$aeng
002026424 110__ $$aCERN. Geneva
002026424 111__ $$92015-06-17T14:00:00$$aAb initio calculation of the neutron-proton mass difference$$cCERN - 4-3-006 - TH Conference Room$$g388466$$z2015-06-17T15:30:00
002026424 245__ $$aAb initio calculation of the neutron-proton mass difference
002026424 260__ $$c2015
002026424 269__ $$c2015-06-17
002026424 300__ $$a4088
002026424 340__ $$aStreaming video
002026424 490__ $$aTH Theoretical Seminar
002026424 518__ $$d2015-06-17T14:00:00
002026424 520__ $$a<!--HTML-->The existence and stability of atoms relies on the fact that neutrons are more massive than protons. The mass difference is only 0.14% of the average and has significant astrophysical and cosmological implications. A slightly smaller or larger value would have led to a dramatically different universe. After an introduction to the problem and to lattice quantum chromodynamics (QCD), I will show how this difference can be computed precisely by carefully accounting for electromagnetic and mass isospin breaking effects in lattice computations. I will also report on results for splittings in the \Sigma, \Xi, D and \Xi_{cc} isospin multiplets, some of which are predictions. The computations are performed in lattice QCD plus QED with four, non-degenerate quark flavors.
002026424 542__ $$dCERN$$g2015
002026424 65017 $$aTH Theoretical Seminar
002026424 65027 $$aEvent
002026424 690C_ $$aTALK
002026424 690C_ $$aCERN
002026424 690C_ $$amovingimages
002026424 700__ $$aLellouch, Laurent$$espeaker$$uCentre de Physique Théorique, CNRS and Aix-Marseille U.
002026424 859__ [email protected]
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002026424 906__ $$pLellouch, Laurent$$uCentre de Physique Théorique, CNRS and Aix-Marseille U.
002026424 961__ $$c2015-06-18T14:07:27$$x2015-04-16T12:35:32
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