47 research outputs found
Influence of CP and CPT on production and decay of Dirac and Majorana fermions
The consequences of CP and CPT invariance for production and subsequent decay
of Dirac and Majorana fermions in polarized fermion--antifermion annihilation
are analytically studied. We derive general symmetry relations for the
production spin density matrix and for the three--particle decay matrices and
obtain constraints for the polarization and the spin--spin correlations of
Dirac and Majorana fermions. We prove that only for Majorana fermions the
energy and opening angle distribution factorizes exactly into contributions
from production and decay if CP is conserved.Comment: 21 pages, 3 eps figures, to be published in EPJ
Distinguishing between MSSM and NMSSM with e\gamma Scattering
We study the associated production of selectrons and neutralinos with
subsequent leptonic decay of the selectron in e\gamma scattering within the
framework of MSSM and NMSSM. Due to the weak couplings of singlino dominated
neutralinos, associated neutralino production e^+ + e^- -> neutralino_1 +
neutralino_2 at a linear collider can be strongly suppressed in some regions of
the parameter space. Then the process e + gamma -> selectron_{L/R} +
neutralino_{1/2} -> e + neutralino_{1/2} + neutralino_1 can give additional
informations on the underlying theory and the character of neutralino_1 and
neutralino_2.Comment: 7 pages, 7 figeres, LaTex, Talk Given at the International Workshop
on High Energy Photon Colliders, DESY Hamburg, June 14-17, 200
Crer e aprender
O Dr. Hans-Jürgen Fraas, professor na Universidade de Munique/Alemanha, esteve na EST como professor visitante, acompanhando atividades letivas e proferindo palestras sobre a questão pedagógica na Igreja. Em “Crer e Aprender” ele aborda a inter-relação entre fé e pedagogia, acentuando os aspectos da relação interpessoal e do sentimento no processo de aprendizagem
CP-odd observables in neutralino production with transverse e+ and e- beam polarization
We consider neutralino production and decay e^+e^ --> chi^0_i chi^0_j,
chi^0_j --> chi^0_1 f \bar{f} at a linear collider with transverse e^+ and e^-
beam polarization. We propose CP asymmetries by means of the azimuthal
distribution of the produced neutralinos and of that of the final leptons,
while taking also into account the subsequent decays of the neutralinos. We
include the complete spin correlations between production and decay. Our
framework is the Minimal Supersymmetric Standard Model with complex parameters.
In a numerical study we show that there are good prospects to observe these CP
asymmetries at the International Linear Collider and estimate the accuracy
expected for the determination of the phases in the neutralino sector.Comment: 30 pages, minor changes in the introduction, references adde
Europa - Lehrziel im Religionsunterricht
Europa - Lehrziel im Religionsunterricht. - In: Lernziel Europa. - München : Olzog. - Bd. 2. (1978). - S. 29-34. - (Politische Studien : Sonderheft ; 1978,3
Religiöse Erziehung
Religiöse Erziehung / Hans-Jürgen Fraas ; Hermann Grosse-Jäger. - In: Der Kindergarten / hrsg. von Heribert Mörsberger ... - Freiburg : Herder. - Bd. 3. (1978). - S. 158-18
Pluralismus leben lernen
Pluralismus leben lernen : religiöser Pluralismus u. Kindergarten. - In: Welt des Kindes. 56. 1978. S. 188-19
Am Anfang des Lebens
Am Anfang des Lebens : erste religiöse Erfahrungen ; e. Elternbuch / Hans-Jürgen Fraas ; Hans May. - München : Diesterweg, 1977. - 196 S