280 research outputs found
Lieder und Gesänge aus "Der Mann seiner Frau" : Operette in 3 Akten / Musik von Rud. Gfaller. [Text] von Bruno Decker und Rob. Pohl
Wortlaut der Lieder und Gesänge aus "Der dumme August" : Operette in 3 Akten / Musik von Rud. Gfaller. [Text] von Bruno Decker und Rob. Pohl
Der liebe Pepi : musikalischer Schwank in drei Akten ; (nach einem Lustspiel von Friedmann-Frederich) / Musik von Walter W. Goetze. [Text] von Bruno Decker und Otto Sprinzel
The Physics of Mixing: and in the Chiral Quark Model
We compute the parameter and the mass difference of the system by means of the chiral quark model. The
chiral coefficients of the relevant and chiral
lagrangians are computed via quark-loop integration. We include the relevant
effects of one-loop corrections in chiral perturbation theory. The final result
is very sensitive to non-factorizable corrections of coming
from gluon condensation. The size of the gluon condensate is determined by
fitting the experimental value of the amplitude . By
varying all the relevant parameters we obtain
We evaluate within the model the long-distance contributions to
induced by the double insertion of the chiral lagrangian and
study the interplay between short- and long-distance amplitudes. By varying all
parameters we obtain Finally, we investigate the phenomenological constraints on
the Kobayashi-Maskawa parameter Im entering the determination of
.Comment: 31 pages, Latex file including 7 eps figures. Revised version to
appear in Nucl. Phys.
Crystallization and Preliminary Analysis of Crystals of the 24-Meric Hemocyanin of the Emperor Scorpion (Pandinus imperator)
Hemocyanins are giant oxygen transport proteins found in the hemolymph of several invertebrate phyla. They constitute giant multimeric molecules whose size range up to that of cell organelles such as ribosomes or even small viruses. Oxygen is reversibly bound by hemocyanins at binuclear copper centers. Subunit interactions within the multisubunit hemocyanin complex lead to diverse allosteric effects such as the highest cooperativity for oxygen binding found in nature. Crystal structures of a native hemocyanin oligomer larger than a hexameric substructure have not been published until now. We report for the first time growth and preliminary analysis of crystals of the 24-meric hemocyanin (MW = 1.8 MDa) of emperor scorpion (Pandinus imperator), which diffract to a resolution of 6.5 Å. The crystals are monoclinc with space group C 1 2 1 and cell dimensions a = 311.61 Å, b = 246.58 Å and c = 251.10 Å (α = 90.00°, β = 90.02°, γ = 90.00°). The asymmetric unit contains one molecule of the 24-meric hemocyanin and the solvent content of the crystals is 56%. A preliminary analysis of the hemocyanin structure reveals that emperor scorpion hemocyanin crystallizes in the same oxygenated conformation, which is also present in solution as previously shown by cryo-EM reconstruction and small angle x-ray scattering experiments
and Explicit Chiral Symmetry Breaking
The parameter is discussed in the general context of calculating beyond
the factorization approximation for hadronic matrix elements. A variant of the
method of Bardeen et al. is used. We present calculations within a low
energy approach and a calculation within the Nambu--Jona-Lasinio model.
Matching with the QCD behaviour and dependence on non-zero current quark masses
is studied.Comment: 15 pages, 4 postscript figures included, NORDITA-94/44 N,P. Mistake
in the numerics discovered which changed some of the conclusions. One figure
also change
Updating the Unitarity Triangle: Top Quark Mass Versus Nonperturbative Uncertainties
We summarize the present knowledge on the non-perturbative hadronic inputs
needed in the analysis of - mixing and the CP-violating
parameter of the - system. Using this information,
together with the recently determined value of the top-quark mass, we update
the phenomenological constraints on the unitarity triangle.Comment: 21 pages, Plain LateX, 7 figures included, preprint FTUV/94-37,
IFIC/94-32, NBI-94-3
The Parameter in the Expansion
We calculate the parameter within the framework of the
expansion. We essentially use the technique presented by Bardeen, Buras and
G\'erard but calculate an off-shell Green function in order to disentangle
different contributions. We study this Green function in pure Chiral
Perturbation Theory (CHPT) first and afterwards in the expansion in the
presence of an explicit cut-off to determine and the counterterms
appearing in CHPT. The high energy part is done using the renormalization
group. For the low-energy contributions we use both CHPT and an Extended
Nambu--Jona-Lasinio model. This model has the right properties to match with
the high energy QCD behaviour. We then study explicit chiral symmetry breaking
effects by calculating with both massless and degenerate quarks together with
the real case. A detailed analysis and comparison with the results found within
other approaches is done. Consequences for present lattice calculations of this
parameter are then obtained. As final result we get .
If we get .Comment: 44 pages, uses epsf.sty, 9 figures included (8 postscript, 1 LaTeX
Standard Model Confronting New Results for epsilon'/epsilon
We analyze the CP violating ratio \epe=epsilon'/epsilon in the Standard Model
in view of the new KTeV results. We review the present status of the most
important non-perturbative parameters B_6, B_8, B_K and of the strange quark
mass m_s. We also briefly discuss the issues of final state interactions and
renormalization scheme dependence. Updating the values of the CKM parameters,
of m_t and Lambda (MSbar) and using Gaussian errors for the experimental input
and flat distributions for the theoretical parameters we find \epe
substantially below the NA31 and KTeV data: \epe= (7.7^{+6.0}_{-3.5}) 10^{-4}
and \epe= (5.2^{+4.6}_{-2.7}) 10^{-4} in the NDR and HV renormalization schemes
respectively. A simple scanning of all input parameters gives on the other hand
1.05 10^{-4} < \epe < 28.8 10^{-4} and 0.26 10^{-4} < \epe < 22.0 10^{-4}
respectively. Analyzing the dependence on various parameters we find that only
for extreme values of B_6, B_8 and m_s and suitable values of CKM parameters
and Lambda(MSbar), the ratio \epe can be made consistent with data. We analyze
the impact of these data on the lower bounds for Im(V_{td}V_{ts}^*), Br(K_L to
pi^0 nu barnu), Br(K_L to pi^0e^+e^-)_{dir} and on tan(beta) in the Two Higgs
Doublet Model II.Comment: main latex-file, 4 figures and related latex files, 47 page
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