Ludwig-Maximilians-Universität München

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1994Show all

44 papers · 1 filter

hep-th1994★ 17 cited

Phase Diagram of Gross-Neveu Model at Finite Temperature, Density and Constant Curvature

S. Kanemura, H. -T. Sato

We discuss a phase structure of chiral symmetry breaking in the Gross-Neveu model at finite temperature, density and constant curvature. The effective potential is evaluated in the…

hep-th1994★ 5 cited

Reconstruction of Hidden Symmetries

Bodo Pareigis

Representations of a group $G$ in vector spaces over a field $K$ form a category. One can reconstruct the given group $G$ from its representations to vector spaces as the full grou…

hep-ph1994★ 29 cited

Production Mechanisms for $B_{c}$ Mesons in Photon--Photon Collisions

K. Kołodziej, A. Leike, R. Rückl

Using photon-photon collisions as a particularly transparent study case we investigate the production mechanisms for $B_{c}$ mesons. In nonrelativistic approximation and to $O(α^2α_s…

hep-th1994★ 9 cited

Laughlin states on the sphere as representations of Uq(sl(2))

N. Aizawa, S. Sachse, H-T. Sato

We discuss quantum algebraic structures of the systems of electrons or quasiparticles on a sphere of which center a magnetic monople is located on. We verify that the deformation p…

hep-ph1994★ 41 cited

Some Phenomenological Implications of String Loop Effects

Jan Louis, Yosef Nir

We investigate low energy implications of string loop corrections to supergravity couplings which break a possible flavor universality of the tree level. If Supersymmetry is broken…

hep-th1994★ 514 cited

Simple Singularities and N=2 Supersymmetric Yang-Mills Theory

A. Klemm, W. Lerche, S. Theisen +1

We present a first step towards generalizing the work of Seiberg and Witten on N=2 supersymmetric Yang-Mills theory to arbitrary gauge groups. Specifically, we propose a particular…

hep-ph1994★ 8 cited

Lepton-Quark Masses and Democratic Symmetry

Harald Fritzsch

It is shown that the simplest breaking of the subnuclear democracy leads to a successful description of the mixing between the second and third family. In the lepton channel the nu…

hep-th1994★ 4 cited

Canonical quantization of the degenerate WZ action including chiral interaction with gauge fields

S. A. Frolov, A. A. Slavnov, C. Sochichiu

Canonical quantization of the Wess-Zumino (WZ) model including chiral interaction with gauge field is considered for the case of a degenerate action. The two-dimensional SU(2) Yang…

hep-ph1994★ 7 cited

Probing Anomalous Quartic Vector Boson Couplings in $e^{-} e^{-}$ Collisions

Frank Cuypers, Karol Kolodziej

We study the incidence of genuine quartic vector boson couplings in the reactions e-e- -> e-e-ZZ, e-νZW, ννWW. We find that a linear collider operated in the e-e- mode will provide…

hep-ph1994★ 26 cited

Wolfenstein Parametrization Re-examined

Zhi-zhong Xing

The Wolfenstein parametrization of the $3 \times 3$ Kobayashi-Maskawa (KM) matrix $V$ is modified by keeping its unitarity up to the accuracy of $O (λ^{6})$ . This modification can se…

hep-ph1994★ 23 cited

THE PROCESS $e^{+} e^{-} \to l l ˉ q q ˉ$ AT LEP AND NLC

Dima Bardin, Arnd Leike, Tord Riemann

The cross sections for the reaction $e^{+} e^{-} \to l l ˉ q q ˉ$ and for similar four fermion production processes at LEP~1, LEP~2 and the NLC are calculated. Due to th…

hep-th1994★ 1 cited

Half-Differentials and Fermion Propagators

Rainer Dick

From a geometric point of view, massless spinors in $3 + 1$ dimensions are composed of primary fields of weights $(\frac{1}{2}, 0)$ and $(0, \frac{1}{2})$ , where the weights are define…

hep-th1994★ 14 cited

On Bogoliubov Transformation of Scalar Wave Functions in De Sitter Space

Haru-Tada Sato, Hisao Suzuki

We discuss the Bogoliubov transformation of the scalar wave functions caused by the change of coordinates in 4 dimensional de Sitter space. It is shown that the exact Bogoliubov co…

hep-ph1994★ 417 cited

$D^{} D π$ and $B^{} B π$ couplings in QCD

V. M. Belyaev, V. M. Braun, A. Khodjamirian +1

We calculate the $D^{*} D π$ and $B^{*} B π$ couplings using QCD sum rules on the light-cone. In this approach, the large-distance dynamics is incorporated in a set of pion wave functions.…

hep-ph1994★ 3 cited

Heavy Meson Form Factors, Couplings and Exclusive Decays in QCD

A. Khodjamirian, R. Rückl

We discuss the form factors of the heavy-to-light transitions $B \ra π$ and $D\ra π$, the $B^{*} B π$ and $D^{*} D π$ coupling constants, and the nonfactorizable amplitude of the decay $…

gr-qc1994★ 77 cited

Cosmological solutions of the Vlasov-Einstein system with spherical, plane, and hyperbolic symmetry

Gerhard Rein

The Vlasov-Einstein system describes a self-gravitating, collisionless gas within the framework of general relativity. We investigate the initial value problem in a cosmological se…

hep-ph1994★ 5 cited

Isolating the Penguin-diagram Contribution to $C P$ Violation in $B_{d}^{0}$ vs $B ˉ_{d}^{0} \to π^{+} π^{-}$

Zhi-zhong Xing

A reliable prediction for $C P$ violation in $B_{d}^{0}$ vs $B ˉ_{d}^{0} \to π^{+} π^{-}$ suffers from the penguin-diagram induced uncertainty. With the help of SU(3) rela…

hep-ph1994★ 8 cited

Exact Cancellation of Quadratic Divergences in Top Condensation Models

Andreas Blumhofer

We discuss the hierarchy problem and the corresponding quadratic divergences in the top mode Standard Model. Quadratic divergences appear at each order 1/N_c since fermionic and bo…

hep-th1994★ 1 cited

Hilbert Space Representation of an Algebra of Observables for q-Deformed Relativistic Quantum Mechanics

W. Zippold

Using a representation of the q-deformed Lorentz algebra as differential operators on quantum Minkowski space, we define an algebra of observables for a q-deformed relativistic qua…

hep-ex1994★ 98 cited

Spin Asymmetry in Muon--Proton Deep Inelastic Scattering on a Transversely-Polarized Target

The Spin Muon Collaboration

We measured the spin asymmetry in the scattering of 100 GeV longitudinally-polarized muons on transversely polarized protons. The asymmetry was found to be compatible with zero in…

hep-th1994

Non-Standard Fermion Propagators from Conformal Field Theory

Rainer Dick

It is shown that Weyl spinors in 4D Minkowski space are composed of primary fields of half-integer conformal weights. This yields representations of fermionic 2-point functions in…

hep-ph1994★ 66 cited

Constraints on non-universal soft terms from flavor changing neutral currents

D. Choudhury, F. Eberlein, A. König +2

The smallness of flavor changing neutral currents constrains the soft parameter space of supersymmetric extensions of the Standard Model. These low energy constraints are translate…

hep-ph1994★ 1 cited

Production of Heavy Bound States at LEP and Beyond

A. Leike, R. Rueckl

We describe some characteristic properties of $B_{c}$ mesons and discuss the production and the prospects of detection in $e^{+} e^{-}$ , $γ γ$ , and $p ˉ p / pp$ collisions. The production…

cond-mat1994★ 8 cited

Equilibrium Dynamics of Microemulsion and Sponge Phases

G. Gompper, M. Hennes

The dynamic structure factor $G (k, ω)$ is studied in a time-dependent Ginzburg-Landau model for microemulsion and sponge phases in thermal equilibrium by field-theoretic pertu…