F(750), We Miss You as a Bound State of 6 Top and 6 Antitop Quarks, Multiple Point Principle

We review our speculation, that in the pure Standard Model the exchange of Higgses, including also the ones "eaten by $W^{\pm}$ and Z", and of gluons together make a bound state of 6 top plus 6 anti top quarks bind so strongly that its mass gets down to about 1/3 of the mass of the collective mass 12 $m_t$ of the 12 constituent quarks. The true importance of this speculated bound state is that it makes it possible to uphold, even inside the Standard Mode, our proposal for what is really a new law of nature saying that there are several phases of empty space, vacua, all having very small energy densities (of the order of the present energy density in the universe). The reason suggested for believing in this new law called the "Multiple (Criticality) Point Principle" is, that estimating the mass of the speculated bound state using the "Multiple Point Principle" leads to two consistent mass-values; and they even agree with a crude bag-model like estimate of the mass of this bound state. Very, unfortunately, the statistical fluctuation so popular last year, when interpreted as the digamma resonance F(750), turned out not to be a real resonance, because our estimated bound state mass is just around the mass of 750 GeV.Comment: 25 pages, 11 figures, Corfu Summer Institute 2016 "School and Workshops on Elementary Particle Physics and Gravity", 31 August - 23 September, 2016, Corfu, Greec

Contribución al conocimiento de la anapaita de la Cerdanya

Se estudian mineralógicamente los fosfatos miocénicos de Bellver de la Cerdanya (Lérida). Para ello, se emplean las técnicas siguientes: difracción de rayos X, espectroscopia de emisión y absorción de infrarrojos.Mediante el estudio roentgenológico determinamos que la especie mineral en estudio es la Anapaita (FeCa2(P04)2.4H2O). La espectroscopia de emisión confirma, por una parte, la existencia de los elementos constituyentes de la fórmula química: P, Ca y Fe con líneas bien marcadas y, por otra parte, la presencia de Mn, Al, Si, Mg, Na y Cu como contaminantes.Finalmente, el estudio del espectro de absorción de rayos infrarrojos detecta el grupo fosfato, básico, y la presencia de agua de absorción

Contribución al conocimiento de la anapaita de la Cerdanya

Se estudian mineralógicamente los fosfatos miocénicos de Bellver de la Cerdanya (Lérida). Para ello, se emplean las técnicas siguientes: difracción de rayos X, espectroscopia de emisión y absorción de infrarrojos.Mediante el estudio roentgenológico determinamos que la especie mineral en estudio es la Anapaita (FeCa2(P04)2.4H2O). La espectroscopia de emisión confirma, por una parte, la existencia de los elementos constituyentes de la fórmula química: P, Ca y Fe con líneas bien marcadas y, por otra parte, la presencia de Mn, Al, Si, Mg, Na y Cu como contaminantes.Finalmente, el estudio del espectro de absorción de rayos infrarrojos detecta el grupo fosfato, básico, y la presencia de agua de absorción

The history of hydrocarbon filling of Danish chalk fields

In an oil reservoir, the geometry of the interface between water and oil is critical in determining the volume of oil trapped below the top seal. If the interface is planar and horizontal, the volume calculation is fairly simple, but if the interface is tilted or undulating, estimation of the volume of the trapped oil is complex as it depends on the combined structural and fluid contact geometry. Since accumulation of the oil may take place over a time span of several million years, while the reservoir is experiencing burial and compaction, the charge history must be studied using dynamic methods that account for these changes and for flow in both the oil and water phases. These processes have been studied quantitatively at the Geological Survey of Denmark and Greenland (GEUS) in a project that has combined the burial model with a fluid flow simulator. The modelling study shows that filling of a chalk reservoir can have a very long and complex history dominated by very low fluid flow rates (cm/year). The resulting modelled present-day situation exhibits a very irregular oil distribution and a non-planar geometry of the fluid contacts, and shows marked similarities to that shown by the field data

Spin liquid in a single crystal of the frustrated diamond lattice antiferromagnet CoAl2O4

We study spin liquid in the frustrated diamond lattice antiferromagnet CoAl2O4 by means of single crystal neutron scattering in zero and applied magnetic field. The magnetically ordered phase appearing below TN=8 K remains nonconventional down to 1.5 K. The magnetic Bragg peaks at the q=0 positions remain broad and their profiles have strong Lorentzian contribution. Additionally, they are connected by weak diffuse streaks along the directions. These observations are explained within the spiral spin liquid model as short-range magnetic correlations of spirals populated at these finite temperatures, as the energy minimum around q=0 is flat and the energy of excited states with q=(111) is low. The agreement is only qualitative, leading us to suspect that microstructure effects are also important. Magnetic field significantly perturbs spin correlations. The 1.5 K static magnetic moment increases from 1.58 mB/Co at zero field to 2.08 mB/Co at 10 T, while the magnetic peaks, being still broad, acquire almost Gaussian profile. Spin excitations are rather conventional spin waves at zero field, resulting in the exchange parameters J1=0.92(1) meV, J2=0.101(2) meV and the anisotropy term D=-0.0089(2) meV for CoAl2O4. The application of a magnetic field leads to a pronounced broadening of the excitations at the zone center, which at 10 T appear gapless and nearly featureless

Rotated stripe order and its competition with superconductivity in La1.88_{1.88}Sr0.12_{0.12}CuO4_4

We report the observation of a bulk charge modulation in La$_{1.88}$Sr$_{0.12}$CuO$_4$ (LSCO) with a characteristic in-plane wave-vector of (0.236, $\pm \delta$), with $\delta$=0.011 r.l.u. The transverse shift of the ordering wave-vector indicates the presence of rotated charge-stripe ordering, demonstrating that the charge ordering is not pinned to the Cu-O bond direction. On cooling through the superconducting transition, we find an abrupt change in the growth of the charge correlations and a suppression of the charge order parameter indicating competition between the two orderings. Orthorhombic LSCO thus helps bridge the apparent disparities between the behavior previously observed in the tetragonal "214" cuprates and the orthorhombic yttrium and bismuth-based cuprates and thus lends strong support to the idea that there is a common motif to charge order in all cuprate families.Comment: 6 pages, 4 figue

Suppression of the structural phase transition and lattice softening in slightly underdoped Ba(1-x)K(x)Fe2As2 with electronic phase separation

We present x-ray powder diffraction (XRPD) and neutron diffraction measurements on the slightly underdoped iron pnictide superconductor Ba(1-x)K(x)Fe2As2, Tc = 32K. Below the magnetic transition temperature Tm = 70K, both techniques show an additional broadening of the nuclear Bragg peaks, suggesting a weak structural phase transition. However, macroscopically the system does not break its tetragonal symmetry down to 15 K. Instead, XRPD patterns at low temperature reveal an increase of the anisotropic microstrain proportionally in all directions. We associate this effect with the electronic phase separation, previously observed in the same material, and with the effect of lattice softening below the magnetic phase transition. We employ density functional theory to evaluate the distribution of atomic positions in the presence of dopant atoms both in the normal and magnetic states, and to quantify the lattice softening, showing that it can account for a major part of the observed increase of the microstrain.Comment: 7 pages, 4 figure