[en] The structure of charm jets in deep-inelastic scattering is studied with the H1 detector at HERA using an integrated luminosity of 50 pb^-1. The analysis is performed in the phase space region 2≤Q²≤100 GeV² and 0.05 ≤y≤ 0.7. Charm events are tagged by a D*-meson required to have a transverse momentum p_T,D*> 1.5 GeV and a pseudorapidity vertical stroke η_D* vertical stroke < 1.5. Furthermore, the events are required to have at least one jet containing the D*-meson (D* Jet). If there is a second jet (OtherJet) in the event, it must have, like the D*Jet, p_T,Jet> 1.5 GeV and vertical stroke η_Jet vertical stroke < 1.5. The structure of the D*Jet and the OtherJet is investigated by measuring jet shape variables and subject multiplicities. In addition the angle of subjects with respect to the jet axis of the D*Jet and the OtherJet is used to study gluon radiation at the parton level. Study of the latter distribution as well as the derived one of a characteristic angle α₀E_Jet as a function of E_Jet is motivated by the expected suppression of soft gluon radiation from heavy quarks, the so-called 'Dead Cone' effect, predicted by QCD. In all distributions differences between the D*Jet and the OtherJet are observed. The data are found to be well described by the QCD model for charm production, which includes the suppression of soft gluon radiation, as implemented in RAPGAP 2.8 and JETSET 7.4. Various checks and a further analysis using higher statistics are presented in order to get a better understanding of the contribution from the 'Dead Cone' effect to the α₀E_Jet vs. E_Jet distribution. (orig.)

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[en] Some aspects of the neutrino oscillation phenomena are studied in the framework of quantum mechanics wave packet formalism. Based on the experimental arguments we consider the implications of the threefold maximal mixing scenarios in this formalism. Some possible predicted consequences are discussed. (authors)

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[en] Monte Carlo alignment studies using the Millepede package are presented. The approach computes the alignment parameters in one step. These parameters are obtained by inverting one huge matrix containing all degrees of freedom of the studied problem. Options of how to constrain the alignment procedure are discussed. Results for the achieved alignment resolution are presented. (orig.)

[en] The relative alignment of the Inner and Outer Tracker performed using Millepede based approach is presented. This talk is focused on the boundary conditions imposed on the alignment. The use of constrains and their impact on the alignment procedure are discussed. Additionally the treatment of the non-linearities, e.g. due to rotations, is shown. Alignment results obtained on all degrees of freedom are presented. (orig.)

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