Conformal Standard Model with an extended scalar sector

We present an extended version of the Conformal Standard Model (characterized by the absence of any new intermediate scales between the electroweak scale and the Planck scale) with an enlarged scalar sector coupling to right-chiral neutrinos. The scalar potential and the Yukawa couplings involving only right-chiral neutrinos are invariant under a new global symmetry SU(3)$_N$ that complements the standard U(1)$_{B-L}$ symmetry, and is broken explicitly only by the Yukawa interaction, of order $10^{-6}$, coupling right-chiral neutrinos and the electroweak lepton doublets. We point out four main advantages of this enlargement, namely: (1) the economy of the (non-supersymmetric) Standard Model, and thus its observational success, is preserved; (2) thanks to the enlarged scalar sector the RG improved one-loop effective potential is everywhere positive with a stable global minimum, thereby avoiding the notorious instability of the Standard Model vacuum; (3) the pseudo-Goldstone bosons resulting from spontaneous breaking of the SU(3)$_N$ symmetry are natural Dark Matter candidates with calculable small masses and couplings; and (4) the Majorana Yukawa coupling matrix acquires a form naturally adapted to leptogenesis. The model is made perturbatively consistent up to the Planck scale by imposing the vanishing of quadratic divergences at the Planck scale (`softly broken conformal symmetry'). Observable consequences of the model occur mainly via the mixing of the new scalars and the standard model Higgs boson.Comment: version accepted for publication in the JHEP, 41 pages, 1 figur

Neutrino loops from neutrino mixing

We show how neutrino mixing leads to a softening of the UV behavior of neutrino loops, and can give rise to anomaly-like, but manifestly UV finite amplitudes. This mechanism may be of special significance for the coupling of dark matter-like particles to the Standard Model, as we illustrate with a one-loop example involving the coupling to $W$-bosons.Comment: 4 pages, 2 figure

Low-affinity potassium uptake by Saccharomyces cerevisiae is mediated by NSC1, a calcium-blocked non-specific cation channel

AbstractPrevious descriptions by whole-cell patch clamping of the calcium-inhibited non-selective cation channel (NSC1) in the plasma membrane of Saccharomyces cerevisiae (H. Bihler, C.L. Slayman, A. Bertl, FEBS Lett. 432 (1998); S.K. Roberts, M. Fischer, G.K. Dixon, D.Sanders, J. Bacteriol. 181 (1999)) suggested that this inwardly rectifying pathway could relieve the growth inhibition normally imposed on yeast by disruption of its potassium transporters, Trk1p and Trk2p. Now, demonstration of multiple parallel effects produced by various agonists and antagonists on both NSC1 currents and growth (of trk1Δtrk2Δ strains), has identified this non-selective cation pathway as the primary low-affinity uptake route for potassium ions in yeast. Factors which suppress NSC1-mediated inward currents and inhibit growth of trk1Δtrk2Δ cells include (i) elevating extracellular calcium over the range of 10 μM–10 mM, (ii) lowering extracellular pH over the range 7.5–4, (iii) blockade of NSC1 by hygromycin B, and (iv) to a lesser extent by TEA+. Growth of trk1Δtrk2Δ cells is also inhibited by lithium and ammonium; however, these ions do not inhibit NSC1, but instead enter yeast cells via NSC1. Growth inhibition by lithium ions is probably a toxic effect, whereas growth inhibition by ammonium ions probably results from competitive inhibition, i.e. displacement of intracellular potassium by entering ammonium

Aktive Arbeitsmarktpolitik im Brennpunkt VIII: Aktivierung als Prävention vor Langzeitarbeitslosigkeit. Evaluierung des Programmes Jobcoaching 2000 des AMS Wien

Mit Jahresbeginn 2000 wurde seitens des AMS Wien eine neue Form der Regelbetreuung für Kurzzeitarbeitslose implementiert. Als zentrale Ziele wurden eine frühzeitige Aktivierung von 'neu' arbeitslos gewordenen Personen und in der Folge eine Verringerung der Übertritte in die Langzeitarbeitslosigkeit angepeilt. Um diese Ziele zu erreichen, setzte das Programm Jobcoaching 2000 auf drei neue Aktivierungsmomente

Wirtschaft

WIRTSCHAFT Wirtschaft / Adam, Hermann (Rights reserved) ( -

Natur und Menschenleben : Drei Erzählungen für Kinder zur Unterhaltung, Belehrung und Warnung

Enthält: Vorwort 1. Die Waldröschen. S. 5 2. Adelaide, das Mädchen vom Alpengebirge. S. 49 3. Der Scheideweg, oder da- oder dorthin. S. 7