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Physical Sciences, Nuclear & High Energy Physics; nuclear charge radius; strong coupling constant; Fermi’s weak coupling constant; nuclear binding energy coefficient
Online: 12 October 2017 (04:39:19 CEST)


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At nuclear scale, we present three heuristic relations pertaining to strong and electroweak coupling constants. With these relations, close to beta stability line, it is possible to study nuclear binding energy with a single energy coefficient of magnitude $\left(\frac{1}{{\alpha}_{s}}\right)\left[\frac{{e}^{2}}{4\pi {\epsilon}_{0}{R}_{0}}\right]\approx 10.0\text{MeV}\text{.}$ With reference to up and down quark masses, it is also possible to interpret that, nuclear binding energy is proportional to the mean mass of $\left[\left(2{m}_{u}+{m}_{d}\right)\text{and}\left({m}_{u}+2{m}_{d}\right)\right]\approx 10.0\text{MeV}.$
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Physical Sciences, Nuclear & High Energy Physics; multiverse; anthropic argument; finetuning
Online: 15 June 2017 (12:30:38 CEST)


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Our existence depends on a variety of constants which appear to be extremely finetuned to allow for the existence of life as we know it. These include the number of spatial dimensions, the strengths of the forces, the masses of the particles, the composition of the Universe and others. On the occasion of the 300^{th} anniversary of the death of G.W. Leibniz we discuss the question of whether we live in the "Best of all possible Worlds". The hypothesis of a multiverse could explain the mysterious fine tuning of so many fundamental quantities. Anthropic arguments are critically reviewed.
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Physical Sciences, Nuclear & High Energy Physics; quarks; spinspin interaction; hadronization limit; topquark; etaetaprime puzzle; mass spectrum
Online: 17 January 2017 (09:54:27 CET)


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A structurebased view on mesons is given, based upon the concept of an archetype quark, described as a pointlike source producing an energy flux, the spatial description of which is derived from the functional description of the Higgs field. This enables to conceive the archetype meson (pion) as a structure that behaves as a onebody anharmonic quantum mechanical oscillator. All mesons appear being excitations of the archetype, thereby allowing a calculation of the mass spectrum without the use of empirical parameters for the masses of the quark flavors. This includes a physically comprehensible analysis of the spinspin interaction between quarks. It also provides a solution for the etaetaprime puzzle. Next to this, it is shown that quite some particles that are presently regarded as elementary, have a common root and can be traced back to a few archetypes only.
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Physical Sciences, Nuclear & High Energy Physics; quarkgluon plasma, hydrodynamics, pseudorapidity distribution, initial state, energy density, Bjorken estimate
Online: 5 October 2016 (09:04:52 CEST)


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Accelerating, exact, explicit and simple solutions of relativistic hydrodynamics allow for a simple and natural description of highly relativistic p+p collisions. These solutions yield a finite rapidity distribution, thus they lead to an advanced estimate of the initial energy density of high energy collisions. We show that such an advanced estimate yields an initial energy density in $\sqrt{s}=7$ and 8 TeV p+p collisions at LHC around or above the critical energy density from lattice QCD, and a corresponding initial temperature above the critical temperature from QCD and the Hagedorn temperature. This suggests that the collision energy of the LHC corresponds to a large enough initial energy density to create a nonhadronic perfect fluid even in pp collisions. %We also show, that several times the %critical energy density may have been reached in high multiplicity events, hinting at a nonhadronic medium created in %high multiplicity $\sqrt{s}=7$ and 8 TeV p+p collisions.