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24 results on '"Canzler, T."'

1. The structure of [4-(phenylazo)phenoxy]hexane-1-thiol self-assembled monolayers on Au(111)

Author

Mannsfeld, S. C. B., Canzler, T. W., Fritz, T., Proehl, H., Leo, K., Stumpf, S., Goretzki, S., and Gloe, K.

Subjects
Chemistry, Physical and theoretical -- Research, Monomolecular films -- Physiological aspects, Thiols -- Physiological aspects, Fourier transform spectroscopy -- Usage, Scanning tunneling microscopy -- Usage, Gold -- Physiological aspects, Chemicals, plastics and rubber industries
Published
2002

3. Search for fractional charge and heavy stable particles at PETRA

Author

Bartel, W., Canzler, T., Cords, D., Dittmann, P., Eichler, R., Felst, R., Haidt, D., Kawabata, S., Krehbiel, H., Naroska, B., O'Neill, L. H., Olsson, J., Steffen, P., Yen, W. L., Elsen, E., Helm, M., Petersen, A., Warming, P., Weber, G., Drumm, H., Heintze, J., Heinzelmann, G., Heuer, R. D., von Krogh, J., Lennert, P., Matsumura, H., Nozaki, T., Riesenberg, H., Wagner, A., Darwill, D. C., Foster, F., Hughes, G., Wriedt, H., Allison, J., Ball, A. H., Duerdoth, I., Hassard, J., Loebinger, F., McCann, H., King, B., Macbeth, A., Mills, H., Murphy, P. G., Prosper, H., Stephens, K., Clarke, D., Goddard, M. C., Marshall, R., Pearce, G. F., Imori, M., Kobayashi, T., Komamiya, S., Koshiba, M., Minowa, M., Orito, S., Sato, A., Suda, T., Takeda, H., Totsuka, Y., Watanabe, Y., Yamada, S., Yanagisawa, C., and JADE-Collaboration

Published
1980
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5. Impact of Fano Resonances on the Wannier-Stark Ladder

Author

FRAUNHOFER-INST FUER ANGEWANDTE FESTKOERPERPHYSIK FREIBURG (GERMANY F R), Holfeld, P., Canzler, T. W., Whittaker, D. M., Loeser, F., Sudziust, M., FRAUNHOFER-INST FUER ANGEWANDTE FESTKOERPERPHYSIK FREIBURG (GERMANY F R), Holfeld, P., Canzler, T. W., Whittaker, D. M., Loeser, F., and Sudziust, M.

Abstract

We report on the observation of Fano resonances in electrically biased superlattices. In such structures. Coulomb interaction couples discrete exciton states to continua of lower lying subbands. We thus observe Fano resonances on the Wannier-Stark states. In superlattices, it is possible to continuously tune the coupling strength by sweeping the electric field. We prove this by linear absorption spectroscopy which demonstrates that the coupling and the line asymmetry change with field. We also measured the polarization decay of the Wannier-Stark transitions and found a decrease of the dephasing times for growing Fano coupling strength., Pres: 7th Int Symp Nanostructures: Physics and Technology, St Petersburg, Russia. 14-18 Jun 1999. p340-343. This article is from ADA407055 Nanostructures: Physics and Technology. 7th International Symposium. St. Petersburg, Russia, June 14-18, 1999 Proceedings

Published
1999

10. Electroproduction of π n, π p and K Λ, K 2211; final states above the resonance region.

Author

Brauel, P., Canzler, T., Cords, D., Felst, R., Grindhammer, G., Helm, M., Kollmann, W., Krehbiel, H., and Schädlich, M.

Abstract

The reactions Σ p→π n, K Λ, K ∑ and Σ n→π n were studied at invariant hadronic masses around 2.2. GeV for Q=0.06, 0.28, 0.70, and 1.35 GeV. The main results are: At small | t| the π production is dominated by longitudinally polarized photons and can be described by one pion exchange. At low | t| the transverse (π n) cross section drops steeply with Q, but remains roughly constant for Q≧0.5 GeV. For | t⊢≧0.8 GeV, (π n/ dt) is almost independent of Q. The integrated cross section (π n) shows a similar Q-dependence as σ ( γ p) for Q≧0.28 GeV. The ratio σ(π p)/ σ(π n) at Q=0.70 and 1.35 GeV for | t|≧0.6 GeV is smaller than in photoproduction and close to 1/4. The ratio σ( K ∑ decreases steeply with Q following roughly the predictions of the quark-parton model. [ABSTRACT FROM AUTHOR]

Published
1979
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12. Observation of planar three-jet events in e+e− annihilation and evidence for gluon bremsstrahlung

Author

Bartel, W., Canzler, T., O'Neill, L. H., Olsson, J., Steffen, P., Yen, W. L., Elsen, E., Helm, M., Petersen, A., Warming, P., Weber, G., Drumm, H., Cords, D., Heintze, J., Heinzelmann, G., Heuer, R. D., von Krogh, J., Lennert, P., Matsumura, H., Nozaki, T., Rieseberg, H., Wagner, A., Darvill, D. C., Dittmann, P., Foster, F., Hughes, G., Wriedt, H., Allison, J., Armitage, J., Duerdoth, I., Hassard, J., Loebinger, F., King, B., Macbeth, A., Eichler, R., Mills, H., Murphy, P. G., Prosper, H., Stephens, K., Clarke, D., Goddard, M. C., Hedgecock, R., Marshall, R., Pearce, G. F., Imori, M., Felst, R., Kobayashi, T., Komamiya, S., Koshiba, M., Minowa, M., Orito, S., Sato, A., Suda, T., Takeda, H., Totsuka, Y., Watanabe, Y., Haidt, D., Yamada, S., Yanagisawa, C., JADE Collaboration, Kawabata, S., Krehbiel, H., and Naroska, B.

Subjects
Physics, Nuclear and High Energy Physics, Jet (fluid), Particle physics, Annihilation, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Hadron, Bremsstrahlung, Statistical fluctuations, Gluon, Nuclear physics, Planar, ddc:530, High Energy Physics::Experiment
Abstract

Topological distributions of charged and neutral hadrons from the reaction e+e− → multihadrons are studied at √s of about 30 GeV. An excess of planar events is observed at a rate which cannot be explained by statistical fluctuations in the standard two-jet process. The planar events, mostly consisting of a slim jet on one side and a broader jet on the other, are shown actually to possess three-jet structure by demonstrating that the broader jet itself consists of two collinear jets in its own rest system. Detailed agreement between data and predictions is obtained if the process e + e − →q q g is taken into account. This strongly suggests gluon bremsstrahlung as the origin of the planar three-jet events. By comparison of the data with the qqg-model we obtain a value for the strong coupling constant of αS(q2 = 0.17 ± 0.04.

Published
1980
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14. Electroproduction of π+n, π-p andK+Λ,K+2211;0 final states above the resonance region

Author

Brauel, P., Canzler, T., Cords, D., Felst, R., Grindhammer, G., Helm, M., Kollmann, W. -D., Krehbiel, H., and Schädlich, M.

Abstract

The reactionsΣvp→π+n,K+Λ,K+∑0 andΣvn→π+n were studied at invariant hadronic masses around 2.2. GeV forQ2=0.06, 0.28, 0.70, and 1.35 GeV2. The main results are: At small |t| the π+ production is dominated by longitudinally polarized photons and can be described by one pion exchange. At low |t| the transverse (π+n) cross section drops steeply withQ2, but remains roughly constant forQ2≧0.5 GeV2. For |t⊢≧0.8 GeV2, (π+n/dt) is almost independent ofQ2. The integrated cross section (π+n) shows a similarQ2-dependence asσtot (γvp) forQ2≧0.28 GeV2. The ratioσ(π-p)/σ(π+n) atQ2=0.70 and 1.35 GeV2 for |t|≧0.6 GeV2 is smaller than in photoproduction and close to 1/4. The ratioσ(K+∑0 decreases steeply withQ2 following roughly the predictions of the quark-parton model.

Published
1979
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15. Separation of $\sigma_L$ and $\sigma_u$ in $\pi^+$ electroproduction above the resonance region

Author

Brauel, P., Canzler, T., Cords, D., Felst, R., Grindhammer, Guenter, Helm, M., Kollmann, W.-D., Krehbiel, H., and Schadlich, M.

Subjects
ELECTRON [FINAL STATE], TRANSVERSE [POLARIZATION], POLARIZATION: TRANSVERSE, N: FINAL STATE, FINAL STATE [N], ELECTROPRODUCTION [PI+], POLARIZATION [PHOTON], ELECTROPRODUCTION: PI+, PHOTON P: INTERACTION, LONGITUDINAL [POLARIZATION], INTERACTION [PHOTON P], N [FINAL STATE], MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, FINAL STATE [PI+], ddc:530, ELECTRON P [INTERACTION], INTERACTION: ELECTRON P, +N+PI%2B%22">PHOTON P --> N PI+, PI+: ELECTROPRODUCTION, FINAL STATE: PI+, ELECTRON: FINAL STATE, MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], FINAL STATE [ELECTRON], PHOTON: POLARIZATION, INTERACTION [ELECTRON P], +N+PI%2B+ELECTRON%22">ELECTRON P --> N PI+ ELECTRON, INTERACTION: PHOTON P, 2.2 GEV: 0-0.28 (GEV)-SQUARED, PI+ [FINAL STATE], DESY ES, FINAL STATE: ELECTRON, PHOTON [POLARIZATION], FINAL STATE: N, 0-0.28 (GEV)-SQUARED [2.2 GEV], PI+: FINAL STATE, PHOTON P [INTERACTION], POLARIZATION: PHOTON, PI+ [ELECTROPRODUCTION], ELECTRON P: INTERACTION, EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, POLARIZATION: LONGITUDINAL, EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER]
Abstract

(1977). doi:10.1016/0370-2693(77)90656-6, The four cross section components σ U , σ L , σ P and σ I were separated in the reaction γ V + p → π + + n at an electron four momentum transfer of Q 2 = 0.70 GeV 2 and an invariant hadronic mass of 2.19 GeV in the range of t between t min and −0.28 GeV 2 . The longitudinal cross section σ L dominates at small |t| and decreases rapidly with increasing |t|. The data are in rough agreement with the prediction of a generalized Born term model. The resulting value for the pion electromagnetic form factor is F π = 0.42 ± 0.015.

Published
1977
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16. Observation of planar three-jet events in $e^+$$e^−$ annihilation and evidence for gluon bremsstrahlung

Author

Bartel, W., Canzler, T., Cords, D., Dittmann, P., Eichler, R., Felst, R., Haidt, D., Kawabata, S., Krehbiel, H., Naroska, B., O'Neill, L. H., Olsson, J., Steffen, P., Yen, W. L., Elsen, E., Helm, M., Petersen, A., Warming, P., Weber, G., Drumm, H., Heintze, J., Heinzelmann, G., Heuer, R. D., Von Krogh, J., Lennert, P., Matsumura, H., Nozaki, T., Rieseberg, H., Wagner, A., Darvill, D. C., Foster, F., Hughes, G., Wriedt, H., Allison, J., Armitage, J., Duerdoth, I., Hassard, J., Loebinger, F., King, B., Macbeth, A., Mills, H., Murphy, P. G., Prosper, H., Stephens, K., Clarke, D., Goddard, M. C., Hedgecock, R., Marshall, R., Pearce, G. F., Imori, M., Kobayashi, T., Komamiya, S., Koshiba, M., Minowa, M., Orito, S., Sato, A., Suda, T., Takeda, H., Totsuka, Y., Watanabe, Y., Yamada, S., and Yanagisawa, C.

Abstract

Physics letters / B 91(1), 142 - 147 (1980). doi:10.1016/0370-2693(80)90680-2, Published by North-Holland Publ., Amsterdam

Published
1980
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18. Search for new flavour production at PETRA

Author

Bartel, W., primary, Canzler, T., additional, Cords, D., additional, Dittmann, P., additional, Eichler, R., additional, Felst, R., additional, Haidt, D., additional, Kawabata, S., additional, Krehbiel, H., additional, Naroska, B., additional, O'Neill, L.H., additional, Olsson, J., additional, Steffen, P., additional, Yen, W.L., additional, Elsen, E., additional, Helm, M., additional, Petersen, A., additional, Warming, P., additional, Weber, G., additional, Drumm, H., additional, Heintze, J., additional, Heinzelmann, G., additional, Heuer, R.D., additional, von Krogh, J., additional, Lennert, P., additional, Matsumura, H., additional, Nozaki, T., additional, Rieseberg, H., additional, Wagner, A., additional, Allison, J., additional, Armitage, J., additional, Duerdoth, I., additional, Loebinger, F., additional, Macbeth, A., additional, Mills, H., additional, Murphy, P.G., additional, Prosper, H., additional, Stephens, K., additional, Darvill, D.C., additional, Foster, F., additional, Hughes, G., additional, Wriedt, H., additional, Clarke, D., additional, Goddard, M.C., additional, Hedgecock, R., additional, Marshall, R., additional, Pearce, G.F., additional, Imori, M., additional, Kobayashi, T., additional, Komamiya, S., additional, Koshiba, M., additional, Minowa, M., additional, Orito, S., additional, Sato, A., additional, Suda, T., additional, Takeda, H., additional, Totsuka, Y., additional, Watanabe, Y., additional, Yamada, S., additional, and Yanagisawa, C., additional

Published
1979
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19. Test of quantum electrodynamics at PETRA

Author

Bartel, W., primary, Canzler, T., additional, Cords, D., additional, Dittmann, P., additional, Eichler, R., additional, Felst, R., additional, Haidt, D., additional, Kawabata, S., additional, Krehbiel, H., additional, Naroska, B., additional, O'Neill, L.H., additional, Olsson, J., additional, Steffen, P., additional, Yen, W.L., additional, Elsen, E., additional, Helm, M., additional, Petersen, A., additional, Warming, P., additional, Weber, G., additional, Drumm, H., additional, Heintze, J., additional, Heinzelmann, G., additional, Heuer, R.D., additional, von Krogh, J., additional, Lennert, P., additional, Matsumura, H., additional, Nozaki, T., additional, Rieseberg, H., additional, Wagner, A., additional, Darvill, D.C., additional, Foster, F., additional, Hughes, G., additional, Wriedt, H., additional, Allison, J., additional, Armitage, J., additional, Ball, A., additional, Duerdoth, I., additional, Hassard, J., additional, Loebinger, F., additional, McCann, H., additional, King, B., additional, Macbeth, A., additional, Mills, H., additional, Murphy, P.G., additional, Prosper, H., additional, Stephens, K., additional, Clarke, D., additional, Goddard, M.C., additional, Hedgecock, R., additional, Marshall, R., additional, Pearce, G.F., additional, Imori, M., additional, Kobayashi, T., additional, Komamiya, S., additional, Koshiba, M., additional, Minowa, M., additional, Orito, S., additional, Sato, A., additional, Suda, T., additional, Takeda, H., additional, Totsuka, Y., additional, Watanabe, Y., additional, Yamada, S., additional, and Yanagisawa, C., additional

Published
1980
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20. π+-electroproduction above the resonance region

Author

Brauel, P., primary, Canzler, T., additional, Cords, D., additional, Felst, R., additional, Grindhammer, G., additional, Helm, M., additional, Kollmann, W.-D., additional, Krehbiel, H., additional, and Schädlich, M., additional

Published
1976
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21. Total cross section for hadron production by e+e− annihilation at petra energies

Author

Bartel, W., primary, Canzler, T., additional, Cords, D., additional, Dittmann, P., additional, Eichler, R., additional, Felst, R., additional, Gadermann, E., additional, Haidt, D., additional, Kawabata, S., additional, Krehbiel, H., additional, Naroska, B., additional, O'Neill, L.H., additional, Olsson, J., additional, Steffen, P., additional, Yen, W.L., additional, Elsen, E., additional, Helm, M., additional, Petersen, A., additional, Riege, H., additional, Warming, P., additional, Weber, G., additional, Drumm, H., additional, Farr, W., additional, Heintze, J., additional, Heinzelmann, G., additional, Heuer, R.D., additional, von Krogh, J., additional, Lennert, P., additional, Matsumura, H., additional, Nosaki, T., additional, Rieseberg, H., additional, Wagner, A., additional, Allison, J., additional, Armitage, J., additional, Duerdoth, I., additional, Loebinger, F., additional, Macbeth, A., additional, Mills, H., additional, Mercer, D., additional, Murphy, P.G., additional, Prosper, H., additional, Stephens, K., additional, Darvill, D.C., additional, Foster, F., additional, Hughes, G., additional, Wriedt, H., additional, Clarke, D., additional, Goddard, M.C., additional, Hedgecock, R., additional, Marshall, R., additional, Pearce, G.F., additional, Imori, M., additional, Kobayashi, T., additional, Komamiya, S., additional, Koshiba, M., additional, Minowa, M., additional, Orito, S., additional, Sato, A., additional, Suda, T., additional, Takeda, H., additional, Totsuka, Y., additional, Watanabe, Y., additional, Yamada, S., additional, and Yanagisawa, C., additional

Published
1979
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24. Total cross section for hadron production by e +e − annihilation at petra energies

Author

Bartel, W., Canzler, T., Cords, D., Dittmann, P., Eichler, R., Felst, R., Gadermann, E., Haidt, D., Kawabata, S., Krehbiel, H., Naroska, B., O'Neill, L.H., Olsson, J., Steffen, P., Yen, W.L., Elsen, E., Helm, M., Petersen, A., Riege, H., Warming, P., Weber, G., Drumm, H., Farr, W., Heintze, J., Heinzelmann, G., Heuer, R.D., von Krogh, J., Lennert, P., Matsumura, H., Nosaki, T., Rieseberg, H., Wagner, A., Allison, J., Armitage, J., Duerdoth, I., Loebinger, F., Macbeth, A., Mills, H., Mercer, D., Murphy, P.G., Prosper, H., Stephens, K., Darvill, D.C., Foster, F., Hughes, G., Wriedt, H., Clarke, D., Goddard, M.C., Hedgecock, R., Marshall, R., Pearce, G.F., Imori, M., Kobayashi, T., Komamiya, S., Koshiba, M., Minowa, M., Orito, S., Sato, A., Suda, T., Takeda, H., Totsuka, Y., Watanabe, Y., Yamada, S., and Yanagisawa, C.

Published
1979
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