Scientific Commons: G. Zech

The Dalitz plot of 0.5*10/sup 6/ K/sub e3/ decays has been studied to measure the q/sup 2/ dependence of the vector form factor, and to determine the effect of radiative corrections. The observed...

Impact of vegetation fires on composition and circulation of the atmosphere (EFEU) (2004)

Wurzler,S., Simmel,M., Diehl,K., Hennig,T., Herrmann,H., Iinuma,Y., ...

The project addresses the contribution of vegetation fires to the local trace gas and particle budgets of the troposphere and the lower stratosphere, their direct and indirect radiative impact, their...

Limits for the central production of Θ+ and Ξ-- pentaquarks in 920 GeV pA collsions (2004)

Abt,I., Adams,M., Albrecht,H., Amaral,V., Amorim,A., Aplin,S. J., ...

We have searched for Theta^+(1540) and Xi^{--}(1862) pentaquark candidates in proton-induced reactions on C, Ti and W targets at mid-rapidity and \sqrt{s} = 41.6 GeV. In 2x10^8 inelastic events we...

Limits for the central production of Θ+ and Ξ-- pentaquarks in 920 GeV pA collsions (2004)

Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., Aplin, S. J., ...

We have searched for Theta^+(1540) and Xi^{--}(1862) pentaquark candidates in proton-induced reactions on C, Ti and W targets at mid-rapidity and \sqrt{s} = 41.6 GeV. In 2x10^8 inelastic events we...

Impact of vegetation fires on composition and circulation of the atmosphere (EFEU) (2004)

Wurzler, S., Simmel, M., Diehl, K., Hennig, T., Herrmann, H., Iinuma, Y., ...

The project addresses the contribution of vegetation fires to the local trace gas and particle budgets of the troposphere and the lower stratosphere, their direct and indirect radiative impact, their...

Measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions (2003)

Abt,I., Abyzov,A., Adams,M., Albrecht,H., Amaral,V., Amorim,A., ...

Using the HERA-B detector, the b (b) over bar production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The b (b) over bar production was tagged via...

Inclusive V 0 production cross sections from 920 GeV fixed target proton-nucleus collisions (2003)

Abt,I., Abyzov,A., Adams,M., Albrecht,H., Amaral,V., Amorim,A., ...

Inclusive differential cross sections dσpA/dxF and dσpA/dp2t for the production of K0S, Λ, and Λ particles are measured at HERA in proton-induced reactions on C, Al, Ti, and W targets. The...

Measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions (2003)

Abt,I., Abyzov,A., Adams,M., Albrecht,H., Amaral,V., Amorim,A., ...

Using the HERA-B detector, the b (b) over bar production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The b (b) over bar production was tagged via...

J/ψ production via χc decays in 920 GeV pA interactions (2003)

Abt,I., Abyzov,A., Adams,M., Albrecht,H., Amaral,V., Amorim,A., ...

Using data collected by the HERA-B experiment, we have measured the fraction of J/ψ’s produced via radiative χc decays in interactions of 920 GeV protons with carbon and titanium targets. We...

Measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions (2003)

Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...

Using the HERA-B detector, the b (b) over bar production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The b (b) over bar production was tagged via...

Inclusive V 0 production cross sections from 920 GeV fixed target proton-nucleus collisions (2003)

Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...

Inclusive differential cross sections dσpA/dxF and dσpA/dp2t for the production of K0S, Λ, and Λ particles are measured at HERA in proton-induced reactions on C, Al, Ti, and W targets. The...

J/ψ production via χc decays in 920 GeV pA interactions (2003)

Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...

Using data collected by the HERA-B experiment, we have measured the fraction of J/ψ’s produced via radiative χc decays in interactions of 920 GeV protons with carbon and titanium targets. We...

Measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions (2003)

Abt, I., Abyzov, A., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...

Using the HERA-B detector, the b (b) over bar production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The b (b) over bar production was tagged via...

J/ψ production via χc decays in 920 GeV pA interactions (2003)

Abt, I., Adams, M., Albrecht, H., Amaral, V., Amorim, A., ...

Using data collected by the HERA-B experiment, we have measured the fraction of J/ψ's produced via radiative χc decays in interactions of 920 GeV protons with carbon and titanium targets. We...

Comparison of different goodness-of-fit tests (2002)

Aslan, B., Zech, G.

Various distribution free goodness-of-fit test procedures have been extracted from literature. We present two new binning free tests, the univariate three-region-test and the multivariate energy...

Dipolar recoupling in NOESY-Type H-1-H-1 NMR experiments under HRMAS conditions (2002)

Thieme,K., Zech,G., Kunz,H., Spiess,Hans Wolfgang, Schnell,Ingo

The concept of dipolar recoupling is introduced to H-1-H-1 NOESY experiments performed under HRMAS conditions. Dipole- dipole couplings are selectively recoupled during the mixing period, while MAS...

Studies of aging and HV break down problems during development and operation of MSGC and GEM detectors for the Inner Tracking System of HERA-B (2002)

Baruth, O., Dreis, H. B., Eisele, F., Gorbunov, I., Gradl, S., ...

The results of five years of development of the inner tracking system of the HERA-B experiment and first experience from the data taking period of the year 2000 are reported. The system contains 184...

A new class of binning free, multivariate goodness-of-fit tests: the energy tests (2002)

Aslan, B., Zech, G.

We present a new class of multivariate binning-free and nonparametric goodness-of-fit tests. The test quantity \emph{energy} is a function of the distances of observed and simulated observations in...

Dipolar recoupling in NOESY-Type H-1-H-1 NMR experiments under HRMAS conditions (2002)

Thieme, K., Zech, G., Kunz, H., Spiess, Hans Wolfgang, Schnell, Ingo

The concept of dipolar recoupling is introduced to H-1-H-1 NOESY experiments performed under HRMAS conditions. Dipole- dipole couplings are selectively recoupled during the mixing period, while MAS...

Properties of Groove Chambers (2001)

Reichwein, I., Werthenbach, U., Zech, G.

Groove chambers with different pitch and gap height have been tested. Gas amplifications of the order of a few times 10$^{3}$ have been obtained. Combining a groove structure with a GEM...

Frequentist and Bayesian Confidence Intervals (2001)

Zech, G.

Frequentist (classical) and the Bayesian approaches to the construction of confidence limits are compared. Various examples which illustrate specific problems are presented. The Likelihood Principle...

Confronting classical and Bayesian confidence limits to examples (2000)

Zech, G.

Classical confidence limits are compared to Bayesian error bounds by studying relevant examples. The performance of the two methods is investigated relative to the properties coherence, precision,...

Carbon Coated Gas Electron Multipliers (1998)

Beirle, S., Werthenbach, U., Zech, G., Zeuner, T.

Gas electron multipliers (GEMs) have been overcoated with a high resistivity 10e14 - 10e15 Ohms / square amorphous carbon layer. The coating avoids charging up of the holes and provides a constant...

Electron Ageing and Polarization in Tailed Radio Galaxies (1997)

Feretti, L., Giovannini, G., Klein, U., Sijbring, L. G., Zech, G.

High-frequency observations of the tailed radio galaxies IC 310, NGC 1265, 3C 129, and 3C 465 have been performed with the Effelsberg 100-m telescope. For the radio galaxies IC 310, NGC 1265 and 3C...

An optical readout for a fibre tracker (1997)

Enkelmann, M., Werthenbach, U., Zech, G., Zeuner, T.

The performance of 16 and 64 channel photomultipliers coupled to scintillating fibres has been tested. The devices are sensitive to single photoelectrons, show little gain losses for magnetic fields...

Measurement of elastic phi photoproduction at HERA (1996)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Measurement of the diffractive cross-section in deep inelastic scattering (1996)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Measurement of the F2 structure function in deep inelastic e+ p scattering using 1994 data from the ZEUS detector at HERA (1996)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Measurement of the reaction gamma* p --> phi p in deep inelastic e+ p scattering at HERA (1996)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Exclusive $\varrho^{0}$ production in deep inelastic electron-proton scattering at HERA (1995)

Derrick, Malcolm, Krakauer, D A, Magill, S, Mikunas, D, Musgrave, B, Repond, J, ...

Inclusive jet cross sections for events with a large rapidity gap with respect to the proton direction from the reaction ep \rightarrow jet \; + \; X with quasi-real photons have been measured with...

Comparing statistical data to Monte Carlo simulation: parameter fitting and unfolding (1995)

Zech, G

Dijet cross-sections in photoproduction at HERA (1995)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Diffractive hard photoproduction at HERA and evidence for the gluon content of the pomeron (1995)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Inclusive transverse momentum distributions of charged particles in diffractive and nondiffractive photoproduction at HERA (1995)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Exclusive rho0 production in deep inelastic electron - proton scattering at HERA (1995)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...

Inclusive charged particle distributions in deep inelastic scattering events at HERA (1995)

ZEUS Collaboration, Derrick, M, Krakauer, D, Magill, S, Mikunas, D, Musgrave, B, ...