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584 results on '"BOWLER, M"'

151. Measurement of the Rate ofνe+d→p+p+e−Interactions Produced byB8Solar Neutrinos at the Sudbury Neutrino Observatory

Author

Ahmad, Q. R., primary, Allen, R. C., additional, Andersen, T. C., additional, Anglin, J. D., additional, Bühler, G., additional, Barton, J. C., additional, Beier, E. W., additional, Bercovitch, M., additional, Bigu, J., additional, Biller, S., additional, Black, R. A., additional, Blevis, I., additional, Boardman, R. J., additional, Boger, J., additional, Bonvin, E., additional, Boulay, M. G., additional, Bowler, M. G., additional, Bowles, T. J., additional, Brice, S. J., additional, Browne, M. C., additional, Bullard, T. V., additional, Burritt, T. H., additional, Cameron, K., additional, Cameron, J., additional, Chan, Y. D., additional, Chen, M., additional, Chen, H. H., additional, Chen, X., additional, Chon, M. C., additional, Cleveland, B. T., additional, Clifford, E. T. H., additional, Cowan, J. H. M., additional, Cowen, D. F., additional, Cox, G. A., additional, Dai, Y., additional, Dai, X., additional, Dalnoki-Veress, F., additional, Davidson, W. F., additional, Doe, P. J., additional, Doucas, G., additional, Dragowsky, M. R., additional, Duba, C. A., additional, Duncan, F. A., additional, Dunmore, J., additional, Earle, E. D., additional, Elliott, S. R., additional, Evans, H. C., additional, Ewan, G. T., additional, Farine, J., additional, Fergani, H., additional, Ferraris, A. P., additional, Ford, R. J., additional, Fowler, M. M., additional, Frame, K., additional, Frank, E. D., additional, Frati, W., additional, Germani, J. V., additional, Gil, S., additional, Goldschmidt, A., additional, Grant, D. R., additional, Hahn, R. L., additional, Hallin, A. L., additional, Hallman, E. D., additional, Hamer, A., additional, Hamian, A. A., additional, Haq, R. U., additional, Hargrove, C. K., additional, Harvey, P. J., additional, Hazama, R., additional, Heaton, R., additional, Heeger, K. M., additional, Heintzelman, W. J., additional, Heise, J., additional, Helmer, R. L., additional, Hepburn, J. D., additional, Heron, H., additional, Hewett, J., additional, Hime, A., additional, Howe, M., additional, Hykawy, J. G., additional, Isaac, M. C. P., additional, Jagam, P., additional, Jelley, N. A., additional, Jillings, C., additional, Jonkmans, G., additional, Karn, J., additional, Keener, P. T., additional, Kirch, K., additional, Klein, J. R., additional, Knox, A. B., additional, Komar, R. J., additional, Kouzes, R., additional, Kutter, T., additional, Kyba, C. C. M., additional, Law, J., additional, Lawson, I. T., additional, Lay, M., additional, Lee, H. W., additional, Lesko, K. T., additional, Leslie, J. R., additional, Levine, I., additional, Locke, W., additional, Lowry, M. M., additional, Luoma, S., additional, Lyon, J., additional, Majerus, S., additional, Mak, H. B., additional, Marino, A. D., additional, McCauley, N., additional, McDonald, A. B., additional, McDonald, D. S., additional, McFarlane, K., additional, McGregor, G., additional, McLatchie, W., additional, Drees, R. Meijer, additional, Mes, H., additional, Mifflin, C., additional, Miller, G. G., additional, Milton, G., additional, Moffat, B. A., additional, Moorhead, M., additional, Nally, C. W., additional, Neubauer, M. S., additional, Newcomer, F. M., additional, Ng, H. S., additional, Noble, A. J., additional, Norman, E. B., additional, Novikov, V. M., additional, O'Neill, M., additional, Okada, C. E., additional, Ollerhead, R. W., additional, Omori, M., additional, Orrell, J. L., additional, Oser, S. M., additional, Poon, A. W. P., additional, Radcliffe, T. J., additional, Roberge, A., additional, Robertson, B. C., additional, Robertson, R. G. H., additional, Rowley, J. K., additional, Rusu, V. L., additional, Saettler, E., additional, Schaffer, K. K., additional, Schuelke, A., additional, Schwendener, M. H., additional, Seifert, H., additional, Shatkay, M., additional, Simpson, J. J., additional, Sinclair, D., additional, Skensved, P., additional, Smith, A. R., additional, Smith, M. W. E., additional, Starinsky, N., additional, Steiger, T. D., additional, Stokstad, R. G., additional, Storey, R. S., additional, Sur, B., additional, Tafirout, R., additional, Tagg, N., additional, Tanner, N. W., additional, Taplin, R. K., additional, Thorman, M., additional, Thornewell, P., additional, Trent, P. T., additional, Tserkovnyak, Y. I., additional, Van Berg, R., additional, Van de Water, R. G., additional, Virtue, C. J., additional, Waltham, C. E., additional, Wang, J.-X., additional, Wark, D. L., additional, West, N., additional, Wilhelmy, J. B., additional, Wilkerson, J. F., additional, Wilson, J., additional, Wittich, P., additional, Wouters, J. M., additional, and Yeh, M., additional

Published
2001
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152. Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in SNO.

Author

McDonald, A. B., Ahmad, Q. R., Allen, R. C., Andersen, T. C., Anglin, J. D., Barton, J. C., Beier, E. W., Bercovitch, M., Bigu, J., Biller, S. D., Black, R. A., Blevis, I., Boardman, R. J., Boger, J., Bonvin, E., Boulay, M. G., Bowler, M. G., Bowles, T. J., Brice, S. J., and Browne, M.C.

Subjects
NEUTRINOS, FLAVOR in particle physics, SCATTERING (Physics)
Abstract

The Sudbury Neutrino Observatory (SNO) is a 1,000 tonne heavy water Cerenkov-based neutrino detector situated 2,000 meters underground in INCO's Creighton Mine near Sudbury, Ontario, Canada. For the neutrinos from [sup 8]B decay in the Sun SNO observes the Charged Current neutrino reaction sensitive only to electron neutrinos and others (Neutral Current and Elastic Scattering) sensitive to all active neutrino types and thereby can search for direct evidence of neutrino flavor change. Using these reactions and assuming the standard [sup 8]B shape, the ν[sub e] component of the [sup 8]B solar flux is φ[sub e] = 1.76[sup +0.05, sub -0.05](stat.)[sup +0.09, sub -0.09] (syst.) × 10[sup 6] cm[sup -2]s[sup -1] for a kinetic energy threshold of 5 MeV. The non-ν[sub e] component is φ[sub μτ] = 3.41[sup +0.45, sub -0.45](stat.)[sup +0.48, sub 0.45] (syst.) × 10[sup 6] cm[sup -2]s[sup -l], 5.3σ greater than zero, providing strong evidence for solar ν[sub e] flavor transformation. The total flux measured with the NC reaction is φ[sub NC] = 5.09[sup +0.44, sub -0.43](stat.)[sup +0.46, sub -0.43] (syst.) × 10[sup 6] cm[sup -2]s[sup -1] consistent with solar models. For charged current events, assuming an undistorted [sup 8]B spectrum, the night minus day rate is 14.0% ± 6.3%[sup +1.5. sub -1.4]% of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the ν[sub e] asymmetry is found to be 7.0% ± 4.9%[sup +1.3, sub -1.2]%. A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the Large Mixing Angle (LMA) solution. [ABSTRACT FROM AUTHOR]

Published
2002

155. A measurement of muon pair production ine + e − annihilation at centre of mass energies $$35.0 \leqq \sqrt s \leqq 46.8$$ GeV

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Hassard, J., Shulman, J., Su, D., Barreiro, F., Hervas, L., Leites, A., del Peso, J., Traseira, M., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Hawkes, C. M., Heath, G. P., Ratoff, P. N., Silvester, I. M., Tomalin, I. R., Veitch, M. E., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Duchovni, E., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Wainer, A. N., Yekutieli, G., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, Zobernig, G., and TASSO Collaboration

Published
1989
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157. Specialist cardiology nurses audit post-MI community aftercare.

Author

Bowler M and Blake A

Abstract

The transition of care into the community gives rise to the auditing and examination of custom and practices. This article describes how the community cardiology specialist nursing team at Sunderland Teaching PCT. have audited the practice of home visiting for acute myocardial infarction patients following discharge from hospital. The aim of the audit was to examine current practices and to consider whether or not other nursing teams have the skills to deliver this service thus enabling the specialist nurses to develop their skills further and develop nurse led initiatives to support the national service framework for coronary heart disease. [ABSTRACT FROM AUTHOR]

Published
2007
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160. On the origin of approximate KNO scaling in e e annihilation.

Author

Bowler, M. and Burrows, P.

Abstract

KNO scaling of the multiplicity distribution in hadronic final states was originally derived as a consequence of Feynman scaling. We show that in iterative models of hadron production in jets, incorporating Feynman scaling, KNO scaling obtains only in the limit when the width of the multiplicity distribution tends to zero. Within the context of the models currently employed to describe e e annihilation into hadrons, the apparent KNO scaling observed is an accidental consequence of effects which violate Feynman scaling. [ABSTRACT FROM AUTHOR]

Published
1986
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161. Bose Einstein symmetrisation, coherence and chaos; with particular application to e e annihilation.

Author

Bowler, M.

Abstract

The phenomenon of Bose-Einstein correlation within the debris of hadronic final states is discussed in simple terms, with particular attention to the nature of coherent and chaotic sources. The Artru-Mennessier string is taken as a model for the pion source in e e annihilation and the predicted Bose-Einstein correlations between like pion pairs evaluated. The results are in good accord with such data as exist. [ABSTRACT FROM AUTHOR]

Published
1985
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162. e e Production of heavy quarks in the string model.

Author

Bowler, M.

Abstract

The string model of Artru and Mennessier predicts that the fragmentation functions for mesons containing heavy quarks are concentrated near fractional momentum z∼1, with width ∼1/μ where μ is the mass of the heavy quark. [ABSTRACT FROM AUTHOR]

Published
1981
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165. Inclusive electron production from heavy quarks in e+e− annihilation at 34.6 GeV center of mass energy

Author

Althoff, M., Braunschweig, W., Eisenmann, J., Strom, D., Takashima, M., Venkataramania, H., Wicklund, E., Wu, Sau Lan, Zobernig, G., TASSO Collaboration, Fischer, H. M., Hartmann, H., Jocksch, A., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Kirschfink, F. J., Eskreys, A., Gather, K., Hultschig, H., Joos, P., Kötz, U., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Lübelsmeyer, K., Notz, D., Nowak, R. J., Pyrlik, J., Rushton, M., Schütte, W., Trines, D., Tymieniecka, T., Wolf, G., Yekutieli, G., Xiao, Ch., Martyn, H.-U., Fohrmann, R., Hilger, E., Kracht, T., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Pösnecker, K.-U., Wiik, B. H., Rosskamp, P., Beuselinck, R., Binnie, D. M., Dornan, P. J., Foster, B., Garbutt, D. A., Jenkins, C., Jones, T. D., Jones, W. G., McCardle, J., Sedgbeer, J. K., Sander, H. G., Thomas, J., Abdullah, W. A. T. Wan, Bell, K. W., Bowler, M. G., Bull, P., Cashmore, R. J., Clarke, P. E. L., Devenish, R., Grossmann, P., Hawkes, C. M., Schmitz, D., Lloyd, S. L., Youngman, C., Forden, G. E., Hart, J. C., Harvey, J., Hasell, D. K., Saxon, D. H., Barreiro, F., Brandt, S., Dittmar, M., Siebke, H., Holder, M., Kreutz, G., Neumann, B., Duchovni, E., Eisenberg, Y., Karshon, U., Mikenberg, G., Mir, R., Revel, D., Ronat, E., Wallraff, W., Shapira, A., Winik, M., Baranko, G., Barklow, T., Caldwell, A., Cherney, M., Izen, J. M., Mermikides, M., Ritz, S., and Rudolph, G.

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Electron–positron annihilation, Hadron, Bottom quark, Nuclear physics, ddc:530, Center of mass, Charm (quantum number), Lepton
Abstract

Physics letters / B 146(6), 443 - 449 (1984). doi:10.1016/0370-2693(84)90157-6, Published by North-Holland Publ., Amsterdam

Published
1984

166. Measurement of R and search for the top quark in e+e− annihilation between 39.8 and 45.2 GeV

Author

Althoff, M., Braunschweig, W., Siebke, H., Mermikides, M., Rudolph, G., Strom, D., Takashima, M., Venkataramania, H., Wicklund, E., Wu, Sau Lan, Zobernig, G., TASSO Collaboration, Wallraff, W., Fischer, H. M., Hartmann, H., Hillen, W., Jocksch, A., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Kirschfink, F. J., Mertens, V., Wedemeyer, R., Wollstadt, M., Eisenberg, Y., Gather, K., Hultschig, H., Joos, P., Kötz, U., Kowalski, H., Ladage, A., Lübelsmeyer, K., Löhr, B., Lüke, D., Mättig, P., Notz, D., Nowak, R. J., Pyrlik, J., Rushton, M., Schütte, W., Trines, D., Wolf, G., Martyn, H.-U., Xiao, Ch., Fohrmann, R., Hilger, E., Kracht, T., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Pösnecker, K. U., Peise, G., Wiik, B. H., Beuselinck, R., Binnie, D. M., Campbell, A. J., Dornan, P. J., Foster, B., Garbutt, D. A., Jenkins, C., Jones, T. D., Jones, W. G., Rimkus, J., McCardle, J., Sedgbeer, J. K., Thomas, J., Wan Abdullah, W. A. T., Bell, K. W., Bowler, M. G., Bull, P., Cashmore, R. J., Clarke, P. E. L., Devenish, R., Rosskamp, P., Grossmann, P., Hawkes, C. M., Lloyd, S. L., Salmon, G. L., Wyatt, T. R., Youngman, C., Forden, G. E., Hart, J. C., Harvey, J., Hasell, D. K., Sander, H. G., Proudfoot, J., Saxon, D. H., Barreiro, F., Dittmar, M., Holder, M., Kreutz, G., Neumann, B., Duchovni, E., Karshon, U., Mikenberg, G., Schmitz, D., Mir, R., Revel, D., Ronat, E., Shapira, A., Yekutieli, G., Baranko, G., Barklow, T., Caldwell, A., Cherney, M., and Izen, J. M.

Subjects
Quantum chromodynamics, Quark, Physics, Nuclear and High Energy Physics, Top quark, Particle physics, Annihilation, High Energy Physics::Lattice, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Electroweak interaction, Elementary particle, Nuclear physics, ddc:530, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Physics letters / B 138(5-6), 441 - 448 (1984). doi:10.1016/0370-2693(84)91936-1, Published by North-Holland Publ., Amsterdam

Published
1984

170. Investigations into the origin of the spurious 17 keV neutrino signal observed in35S beta decay

Author

Bowler, M. G. and Jelley, N. A.

Abstract

An exhaustive study has been made of the ß spectrum of35S, recorded with a Si(Li) detector. The object was to identify the origin of a distortion in the35S ß spectrum some 17 keV below the end point, reported over three years ago and interpreted then as evidence for a 17 keV neutrino. Measurements with different source-detector spacings and with varied collimation have shown that there is a long range curvature in the Kurie plot which is a sensitive function of configuration, but the principal origin of the distortion is energy loss in the35S sources. The35S sources, prepared by chemical adsorption of Ba35SO4 on a gold substrate, are clumped and locally thick. Electrons near the end point lose ~0.3 keV in the source material and if this is taken into account the spectra are well fitted without any admixture of 17 keV neutrino. The source thickness has been investigated with a proton microprobe and determined from both source tilting and the yield of bariumK X-rays; these studies are discussed in detail. The uncertainties in and justification for the form of the electron response function employed are also thoroughly discussed. If there is no systematic error common to the majority of 14 independent sets of35S data, the admixture of 17 keV neutrino is <10-3 (95% CL). A simple search for a kink at 150 keV in the combined data from all 14 runs yielded a limit of 1.8×10-3 (95% CL). The end point of the35S ß spectrum is found to be 167.60±0.05 keV.

Published
1995
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171. Strange meson production ine+e− annihilation

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Hassard, J., Shulman, J., Su, D., Tomalin, I., Watson, A., Cases, G., Hervas, L., Leites, A., del Peso, J., de Trocóniz, J. Fdez, Bowler, M. G., Burrows, P. N., Cashmore, R., Veitch, M. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Caldwell, A., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

The full TASSO data have been used to study the inclusive production of strange mesons ine+e- annihilations. Differential and total cross sections have been measured in the centre of mass energy range 14 to 44 GeV forK0, " and 34.5 to 44 GeV forK*± (892). We have investigated the strange meson production properties in jets by studying the rapidity andpt2 distributions as well as the evolution of the multiplicities as a function of the event sphericity. We find no evidence that the strange meson yields increase with increasing sphericity faster than the total charged multiplicity.

Published
1990
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172. Experimental study of the orientation of three-jet events ine+e− annihilation at PETRA

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Körner, J., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Hassard, J., Shulman, J., Su, D., Tomalin, I., Watson, A., Cases, G., Hervas, L., Leites, A., del Peso, J., Bowler, M. G., Burrows, P. N., Cashmore, R., Veitch, M. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Caldwell, A., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

The full TASSO data have been used to study the orientation of three-jet events ine+e- annihilation. The polar angle distributions of the normal to the three-jet plane as well as the polar angle distribution of the most energetic jet have been measured as a function of the thrust cut-off used to select the three-jet sample. The data corrected for radiation and detector effects are compared to QCD predictions and fair agreement is found. As a consistency check we also present measurements of the azimuthal correlations between the lepton and hadron planes. A significant azimuthal dependence is found, consistent again with the QCD predictions.

Published
1990
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173. Production and decay of charmed mesions ine+e− annihilation at <img src="/fulltext-image.asp?format=htmlnonpaginated&src=U564651613106L43_html\10052_2005_Article_BF01415550_TeX2GIFIE1.gif" border="0" alt=" $$\sqrt s > 28$$ " />

Author

Braunschweig, W., Gerhards, R., Kirschfink, F., Martyn, H., Fischer, H., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J., Pösnecker, K., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Galik, R., Hassard, J., Shulman, J., Su, D., Tomalin, I., Watson, A., Barreiro, F., Leites, A., Peso, J., Bowler, M., Burrows, P., Veitch, M., Forden, G., Hart, J., Saxon, D., Brandt, S., Holder, M., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Caldwell, A., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau, and Zobernig, G.

Abstract

We report on a study of inclusive production ofD*± mesons ine+e− annihilation at c.m. energies between 28 and 46.8 GeV using the TASSO detector at the PETRA storage ring. A hardD*± energy spectrum is measured with a maximum nearED*±≃0.6Ebeam. The measured cross section ratio " indicates thatD* production accounts for a large fraction of the observed charm production. Two complementary methods have been used to determine the forward-backward asymmetry of charm pair production due to electroweak interference. Combining both measurements the product of the axial vector couplings of the electron and the charm quark to the weak neutral current was determined to begAegAc=−(0.276±0.073), in agreement with the standard model prediction of −0.25. Using a sample of reconstructedD*± mesons, the relative strength of the strong interaction coupling of thec quark compared to that of an average of all flavours is measured as αs(c)/αs(all)=0.91±0.38±0.15, consistent with the coupling constant being flavour independent. An update of ourD0 lifetime measurement is presented, based on a considerable increase in statistics, the final result being ".

Published
1989
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174. A measurement of electroweak effects in the reactione+e− → τ+τ− at 35.0 and 42.4 GeV

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Fischer, H. M., Partmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Bernardi, E., Chwastowski, J., Gather, K., Genser, K., Kowalski, H., Löhr, B., Lüke, D., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Walczak, R., Wolf, G., Kolanoski, H., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Hassard, J., Shulman, J., Su, D., Tomalin, I. R., Barreiro, F., Leites, A., del Peso, J., Traseira, M., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Heath, G. P., Ratoff, P. N., Silvester, I. M., Veitch, M. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Wainer, A. N., Yekutieli, G., Muller, D., Ritz, S., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

We report on total cross section and forward backward charge asymmetry measurements of the reactione+e- ? t+t- at centre of mass energies of 35.0 GeV and 42.4 GeV using the TASSO detector. Including previous data an analysis in terms of electroweak parameters of the standard model is presented, and lower limits on mass scale parameters of residual contact interactions are given. A combined analysis of electroweak couplings using all our results on leptonic reactionse+e-?l+l- has been performed.

Published
1989
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175. Pion, kaon and proton cross sections ine+e− annihilation at 34 GeV and 44 GeV c.m. energy

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Lohr, B., Lüke, D., Mattig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Gerhardt, W., Kracht, T., Krasemann, H. L., Krüger, J., Lohrmann, E., Poelz, G., Rehders, P., Tysarczyk, G., Winand, C., Zeuner, W., Binnie, D. M., Hassard, J., Shulman, J., Su, D., Leites, A., del Peso, J., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R., Heath, G. P., Ratoff, P. N., Silvester, I. M., Tomalin, I. R., Veitch, M. E., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Caldwell, A., Muller, D., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Lan Wu, Sau, and Zobernig, G.

Abstract

The inclusive production of p± andK± mesons and of protons and antiprotons ine+e- annihilations has been measured at 34 GeV and 44 GeV center of mass energy; in addition p± mesons have been measured at 44 GeV c.m. energy. Differential cross sections and particle yields are given. At 34 GeV average multiplicities are: $$\begin{gathered} \left\langle {n\left( {\pi ^ \pm } \right)} \right\rangle = 10.9 \pm 0.5,\left\langle {n\left( {K^ \pm } \right)} \right\rangle = 1.76 \pm 0.20, \hfill \\ \left\langle {n\left( {p + \bar p} \right)} \right\rangle = 0.67 \pm 0.06 \hfill \\ \end{gathered} $$ and at 44 GeV: $$\left\langle {n\left( {\pi ^ \pm } \right)} \right\rangle = 11.1 \pm 0.5,\left\langle {n\left( {\pi ^0 } \right)} \right\rangle = 5.4 \pm 1.0.$$

Published
1989
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176. Bose-Einstein correlations observed ine+e− annihilation at a centre of mass energy of 34 GeV

Author

Althoff, M., Braunschweig, W., Kirschfink, F. J., Martyn, H. -U., Rosskamp, P., Wallraff, W., Eisenmann, J., Fischer, H. M., Hartmann, H., Jocksch, A., Knop, G., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Foster, B., Wood, A., Bernardi, E., Eskreys, A., Fohrmann, R., Gather, K., Hultschig, H., Joos, P., Karshon, U., Klima, B., Kötz, U., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Revel, D., Shapira, A., Trines, D., Tymieniecka, T., Wolf, G., Zeuner, W., Hilger, E., Kracht, T., Krasemann, H. L., Lohrmann, E., Poelz, G., Pösnecker, K. -U., Binnie, D. M., Dornan, P. J., Garbutt, D. A., Jenkins, C., Jones, W. G., Sedgbeer, J. K., Su, D., Thomas, J., Wan Abdullah, W. A. T., Barreiro, F., Labarga, L., Ros, E., Bowler, M. G., Bull, P., Cashmore, R. J., Dauncey, P., Devenish, R., Hawkes, C. M., Heath, G., Mellor, D. J., Ratoff, P., Lloyd, S. L., Forden, G. E., Hart, J. C., Hasell, D. K., Saxon, D. H., Brandt, S., Dittmar, M., Holder, M., Kreutz, G., Neumann, B., Eisenberg, Y., Montag, A., Mikenberg, G., Mir, R., Ronat, E., Yekutieli, G., Baranko, G., Caldwell, A., Cherney, M., Hildebrandt, M., Izen, J. M., Mermikides, M., Ritz, S., Strom, D., Takashima, M., Venkataramania, H., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

Bose-Einstein correlations between pairs of charged particles produced ine+e- annihilation into hadronic final states have been studied as a function ofQ2, the relative momentum squared of the two particles in their centre of mass, and as functions of various pairs of kinematic variables. The observed Bose-Einstein enhancement reveals correlation between the position and time of particle emission, and the space-time structure of the source is shown to differ from that of a pion fireball. While most features of the data are well accounted for in terms of the space-time structure of a simple string model, the correlations are better described by the simple function 1+ae-ßQ2. The implications of this result are discussed. The principal features of three particle correlations are explained in terms of the structure of the source inferred from the observed two particle correlations.

Published
1986
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177. Bose Einstein symmetrisation, coherence and chaos; with particular application toe+e− annihilation

Author

Bowler, M. G.

Abstract

The phenomenon of Bose-Einstein correlation within the debris of hadronic final states is discussed in simple terms, with particular attention to the nature of coherent and chaotic sources. The Artru-Mennessier string is taken as a model for the pion source ine+e- annihilation and the predicted Bose-Einstein correlations between like pion pairs evaluated. The results are in good accord with such data as exist.

Published
1985
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178. Particle correlation observed ine+e− annihilations into hadrons at c.m. Energies between 29 and 37 GeV

Author

Althoff, M., Braunschweig, W., Kirschfink, F. J., Martyn, H. U., Rosskamp, R., Siebke, H., Wallraff, W., Eisenmann, J., Fischer, H. M., Hartmann, H., Jocksch, A., Knop, G., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Foster, B., Wood, A., Bernardi, E., Eisenberg, Y., Eskreys, A., Fohrmann, R., Gather, K., Hultschig, H., Joos, P., Klima, B., Kötz, U., Kowalski, H., Lagage, A., Löhr, B., Lüke, D., Mättig, P., Mikenberg, G., Notz, D., Revel, D., Trines, D., Tymieniecka, T., Wolf, G., Zeuner, W., Hilger, E., Kracht, T., Krasemann, H. L., Lohrmann, E., Poelz, G., Pösnecker, K. U., Binnie, D. M., Dornan, P. J., Garbutt, D. A., Jenkins, C., Jones, W. G., Sedgbeer, J. K., Su, D., Thomas, J., Wan Abdullah, W. A. T., Barreiro, F., Labarga, L., Ros, E., Bowler, M. G., Bull, P., Cashmore, R. J., Dauncey, P., Devenish, R., Hawkes, C. M., Heath, G., Mellor, D. J., Ratoff, P., Lloyd, S. L., Bell, K. W., Forden, G. E., Hart, J. C., Hasell, D. K., Saxon, D. H., Brandt, S., Dittmar, M., Holder, M., Kreutz, G., Neumann, B., Duchovni, E., Karshon, U., Montag, A., Mir, R., Ronat, E., Yekutieli, G., Shapira, A., Baranka, G., Caldwell, A., Cherney, M., Hildebrandt, M., Izen, J. M., Mermikides, M., Ritz, S., Strom, D., Takashima, M., Venkataramania, H., Wicklund, E., Wu, S. L., and Zobernig, G.

Abstract

We have studied the correlations between charged particles produced ine+e- annihilations into hadrons at c.m. energies between 29 and 37 GeV. We have analysed the correlations between the charged multiplicities of the jets and the two particle rapidity and charge correlations. No evidence for correlations between the multiplicities of the two jets is found. Two particle short range rapidity and charge correlations are observed, indicating that particles cluster in rapidity and that their charges compensate locally. An extensive study of these correlation effects by QCD Monte Carlo calculations was performed. Evidence for charge correlations due to Bose-Einstein statistics is also observed.

Published
1985
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179. A detailed study of strange particle production ine+e− annihilation at high energy

Author

Althoff, M., Braunschweig, W., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. -U., Rosskamp, P., Schmitz, D., Siebke, H., Wallraff, W., Eisenmann, J., Fischer, H. M., Hartmann, H., Joksch, A., Knop, G., Kolanoski, H., Kuck, H., Mertens, V., Wedemeyer, R., Foster, B., Eskreys, A., Gather, K., Hildebrandt, M., Hultschig, H., Joos, P., Kötz, U., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Nowak, R. J., Pyrlik, J., Ronat, E., Rushton, M., Schütte, W., Trines, D., Tymieniecka, T., Wolf, G., Yekutieli, G., Xiao, Ch., Fohrmann, R., Hilger, E., Kracht, T., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Pösnecker, K. U., Wiik, B. H., Beuselinck, R., Binnie, D. M., Campbell, A. J., Dornan, P. J., Garbutt, D. A., Jenkins, C., Jones, T. D., Jones, W. G., McCardle, J., Sedgbeer, J. K., Thomas, J., Abdullah, W. A. T. Wan, Bell, K. W., Bowler, M. G., Bull, P., Cashmore, R. J., Clarke, P. E. L., Dauncey, P., Devenish, R., Grossmann, P., Hawkes, C. M., Lloyd, S. L., Mellor, D., Youngman, C., Forden, G. E., Hart, J. C., Harvey, J., Hasell, D. K., Saxon, D. H., Woodworth, P. L., Barreiro, F., Brandt, S., Dittmar, M., Holder, M., Kreutz, G., Neumann, B., Duchovni, E., Eisenberg, Y., Karshon, U., Mikenberg, G., Mir, R., Revel, D., Shapira, A., Baranko, G., Caldwell, A., Cherney, M., Izen, J. M., Mermikides, M., Ritz, S., Rudolph, G., Strom, D., Takashima, M., Venkataramania, H., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

Results onK0 and ? production ine+e- annihilation at c.m. energies of 14, 22 and 34 GeV are presented. The shape of theK0 and ? differential cross sections are very similar to each other and to those of p±,K± and ". Scaling violations are observed forK0 production. We obtain a value for the probability to produce strange quark-antiquark pairs relative to that to produce up or down quark-antiquark pairs of 0.35±0.02±0.05. The value ofRh=s(e+e-?hX)/sµµ is shown to rise steadily with c.m. energy for all particle species. At 34 GeV we find 1.48±0.05K0 and 0.31±0.03 ? per event. We have searched for possible ? polarization. The production ofK0's and ?'s in jets is examined as a function ofpT2 and rapidity and compared to that of all charged particles; the yields in two and three jets are also investigated. Results are presented from events with two baryons " observed.

Published
1985
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180. Evidence for a non- <img src="/fulltext-image.asp?format=htmlnonpaginated&src=N713758555J20072_html\10052_2005_Article_BF01572657_TeX2GIFIE1.gif" border="0" alt=" $$q\bar q$$ " /> tensor meson at 1,410 MeV produced in the reaction π−p</

Author

Daum, C., Hertzberger, L., Hoogland, W., Peters, S., Van Deurzen, P., Berglund, A., Chabaud, V., Gonzalez-Arroyo, A., Hyams, B., Tiecke, H., Weilhammer, P., Dwurazny, A., Palka, H., Polok, G., Rybicki, K., Turala, M., Turnau, J., Zalewska, A., Becker, H., Blanar, G., Cerrada, M., Dietl, H., Gallivan, J., Glaubman, M., Klanner, R., Lorenz, E., Lütjens, G., Lutz, G., Männer, W., Pugl, A., Stierlin, U., Blakey, J., Bowler, M., Cashmore, R., Loken, J., Spalding, J., Thompson, G., Alper, B., Damerell, C., Gillman, A., Hardwick, J., and Wickens, F.

Abstract

We present an analysis of theKs0Ks0 system produced in the reaction π−p→Ks0Ks0n at 63 GeV based on ∼700 events in the kinematical region of |t|<0.5 GeV2. We concentrate on masses between 1,200 and 1,600 MeV where a double maximum structure is observed. Performing an amplitude analysis in this mass interval we find thatS,D0 andD+ waves contribute to the mass spectrum at approximately equal strength. The peaks are attributed to spin 2 waves. However, we failed to explained them by interferingf(1270),A2(1310) andf′(1520) resonances alone. While the first peak can be associated withf(1270)−A2(1310) production, an additional tensor meson is needed with mass of ∼1410 MeV and a narrow width for a description of the second one. The analysis as well as the energy dependence deduced from some publishedKs0Ks0 mass spectra suggests this object to be dominantly produced by a natural parity exchange. Because the 2++ " nonet is already complete the nature of the new tensor meson is an open question.

Published
1984
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181. Jet production and fragmentation ine+e− annihilation at 12–43 GeV

Author

Althoff, M., Braunschweig, W., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. -U., Peise, G., Rimkus, J., Rosskamp, P., Sander, H. G., Schmitz, D., Siebke, H., Wallraff, W., Fischer, H. M., Hartmann, H., Hillen, W., Joksch, A., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Wermes, N., Wollstadt, M., Eisenberg, Y., Gather, K., Hultschig, H., Joos, P., Koch, W., Kötz, U., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mattig, P., Notz, D., Nowak, R. J., Pyrlik, J., Quarrie, D. R., Rushton, M., Schütte, W., Trines, D., Wolf, G., Xiao, Ch., Fohrmann, R., Hilger, E., Kracht, T., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Pösnecker, K. U., Wiik, B. H., Beuselinck, R., Binnie, D. M., Campbell, A. J., Dornan, P. J., Foster, B., Garbutt, D. A., Jenkins, C., Jones, T. D., Jones, W. G., McCardle, J., Sedgbeer, J. K., Thomas, J., Abdullah, W. A. T. Wan, Bell, K. W., Bowler, M. G., Bull, P., Cashmore, R. J., Clarke, P. E. L., Devenish, R., Grossmann, P., Hawkes, C. M., Lloyd, S. L., Salmon, G. L., Wyatt, T. R., Youngman, C., Forden, G. E., Hart, J. C., Harvey, J., Hasell, D. K., Proudfoot, J., Saxon, D. H., Woodworth, P. L., Barreiro, F., Dittmar, M., Holder, M., Neumann, B., Duchovni, E., Karshon, U., Mikenberg, G., Mir, R., Revel, D., Ronat, E., Shapira, A., Yekutieli, G., Baranko, G., Barklow, T., Caldwell, A., Cherney, M., Izen, J. M., Mermikides, M., Rudolph, G., Strom, D., Venkataramania, H., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

We present the general properties of jets produced bye+e- annihilation. Their production and fragmentation characteristics have been studied with charged particles for c.m. energies between 12 and 43 GeV. In this energy rangee+e- annihilation into hadrons is dominated by pair production of the five quarksu, d, s, c andb. In addition, hard gluon bremsstrahlung effects which are invisible at low energies become prominent at the high energies. The observed multiplicity distributions deviate from a Poisson distribution. The multiplicity distributions for the overall event as well as for each event hemisphere satisfy KNO scaling to within ~20%. The distributions ofxp=2p/W are presented; scale breaking is observed at the level of 25%. The quantityxpdd/dxp is compared with multigluon emission calculations which predict a Gaussian distribution in terms of ln(1/x). The observed energy dependence of the maximum of the distributions is in qualitative agreement with the calculations. Particle production is analysed with respect to the jet axis and longitudinal and transverse momentum spectra are presented. The angular distribution of the jet axis strongly supports the idea of predominant spin 1/2 quark pair production. The particle distributions with respect to the event plane show clearly the growing importance of planar events with increasing c.m. energies. They also exclude the presence of heavy quark production,e+e-?Q " for quark masses up to 5Q<20.3 GeV (|eQ|=2/3) and 7Q<19 GeV (|eQ|=1/3). The comparison of 1/stotdd/dpT measured at 14, 22 and 34 GeV suggests that hard gluon bremsstrahlung contributes mainly to transverse momenta larger than 0.5 GeV/c. The rapidity distribution forW?22 GeV shows an enhancement away fromy=0 which corresponds to an increase in yield of 10–15% compared to the centre region (y=0). The enhancement probably results from heavy quark production and gluon bremsstrahlung. The particle flux around the jet axis shows with increasing c.m. energy a rapidly growing number of particles collimated around the jet axis, while at large angles to the jet axis almost noW dependence is observed. For fixed longitudinal momentump? approximate “fan invariance” is seen: The shape of the angular distribution around the jet axis is almost independent ofW. The collimation depends strongly onp?. For smallp?,p?<0.2 GeV/c, isotropy is observed. With increasingp? the particles tend to be emitted closer and closer to the jet axis.

Published
1984
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182. Production and muonic decay of heavy quarks ine+e− annihilation at 34.5 GeV

Author

Althoff, M., Braunschweig, W., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. -U., Peise, G., Rimkus, J., Rosskamp, P., Sander, H. G., Schmitz, D., Siebke, H., Wallraff, W., Fischer, H. M., Hartmann, H., Hillen, W., Jocksch, W., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Wedemeyer, R., Wermes, N., Wollstadt, M., Eisenberg, Y., Gather, K., Hultschig, H., Joos, P., Koch, W., Kötz, U., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Nowak, R. J., Pyrlik, J., Quarrie, D. R., Rushton, M., Schütte, W., Trines, D., Wolf, G., Xiao, Ch., Fohrmann, R., Hilger, E., Kracht, T., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Wiik, B. H., Beuselinck, R., Binnie, D. M., Campbell, A. L., Dornan, P. J., Foster, B., Garbutt, D. A., Jenkins, C., Jones, T. D., Jones, W. G., McCardle, J., Sedgbeer, J. K., Abdullah, W. A. T. Wan, Bell, K. W., Bowler, M. G., Bull, P., Cashmore, R. J., Clarke, P. E. L., Devenish, R., Grossmann, P., Hawkes, C. M., Lloyd, S. L., Salmon, G. L., Thomas, J., Wyatt, T. R., Youngman, C., Forden, G. E., Hart, J. C., Harvey, J., Hasell, D. K., Proudfoot, J., Saxon, D. H., Woodworth, P. L., Barreiro, F., Dittmar, M., Holder, M., Neumann, B., Duchovni, E., Karshon, U., Mikenberg, G., Mir, R., Revel, D., Ronat, D., Shapira, A., Yekutieli, G., Barklow, T., Caldwell, A., Cherney, M., Izen, J. M., Mermikides, M., Rudolph, G., Strom, D., Venkataramania, H., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

The production of prompt muons ine+e- annihilation has been studied at centre of mass energies near 34.5 GeV. The measured semi-muonic branching ratios ofb andc quarks areB(b»Xµv) =0.117±0.028±0.01 andB(c?Xµv)=0.082 ±0.012a-0.01+0.02. The fragmentation functions of heavy quarks are hard, b>=0.85a-0.12–0.07+0.10+0.02 and c> =0.77a-0.07–0.11+0.05+0.03. Limits have been set on flavour changing neutral current decays:B(b?Xµ+µ-) <0.02 andB(b?Xµ+µ- (95% confidence level).

Published
1984
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183. An improved measurement of electroweak couplings frome+e−→e+e− ande+e−→μ+μ−

Author

Althoff, M., Braunschweig, W., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. -U., Peise, G., Rimkus, J., Rosskamp, P., Sander, H. G., Schmitz, D., Siebke, H., Wallraff, W., Fischer, H. M., Hartmann, H., Hillen, W., Jocksch, A., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Wedemeyer, R., Wermes, N., Wollstadt, M., Burkhardt, H., Eisenberg, Y., Gather, K., Hultschig, H., Joos, P., Koch, W., Kötz, U., Kowalski, H., Ladage, A., Lohr, B., Lüke, D., Mättig, P., Notz, D., Pyrlik, J., Quarrie, D. R., Rushton, M., Schütte, W., Trines, D., Wolf, G., Xiao, Ch., Fohrmann, R., Hilger, E., Kracht, T., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Wiik, B. H., Beuselinck, R., Binnie, D. M., Campbell, A. J., Dornan, P. J., Foster, B., Garbutt, D. A., Jenkins, C., Jones, T. D., Jones, W. G., McCardle, J., Sedgbeer, J. K., Wan Abdullah, W. A. T., Bell, K. W., Bowler, M. G., Brock, I. C., Cashmore, R. J., Clarke, P. E. L., Devenish, R., Grossmann, P., Llyod, S. L., Salmon, G. L., Thomas, J., Wyatt, T. R., Youngman, C., Hart, J. C., Harvey, J., Hasell, D. K., Proudfoot, J., Saxon, D. H., Woodworth, P. L., Barreiro, F., Dittmar, M., Holder, M., Neumann, B., Duchovni, E., Karshon, U., Mikenberg, G., Mir, R., Revel, D., Ronat, E., Shapira, A., Yekutieli, G., Barklow, T., Caldwell, A., Cherney, M., Izen, J. M., Mermikides, M., Rudolph, G., Strom, D., Venkataramania, H., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

We present an analysis of electroweak leptonic couplings from high statistics experiments on Bhabha scattering and μ pair production at an energy of 34.5 GeV. The forward-backward charge asymmetry of the μ pairs was measured to be −0.098±0.023±0.005. The data were found to agree well with the standard theory of electroweak interaction giving sin2θW=0.27±0.07. The leptonic weak couplings were determined to begv=0.000±0.170 andgA=−0.481±0.055. The data were also used to investigate a class of composite models for leptons.

Published
1984
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184. A search for particles with magnetic charge produced ine+e− annihilations at 543-1543-1543-1GeV

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. U., Rosskamp, P., Bock, B., Eisenmann, J., Fischer, H. M., Hartmann, H., Hilger, E., Jocksch, A., Mertens, V., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Bernardi, E., Chwastowski, J., Eisenberg, Y., Eskreys, A., Gather, K., Hultschig, H., Genser, K., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Montag, A., Notz, D., Pawlak, J. M., Ronat, E., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Zeuner, W., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Pösnecker, K. U., Binnie, D. M., Hassard, J., Sedgbeer, J. K., Shulman, J., Su, D., Watson, A. T., Barreiro, F., Leites, A., del Peso, J., Ros, E., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Dauncey, P., Heath, G. P., Mellor, D. J., Ratoff, P., Tomalin, I., Yelton, J. M., Lloyd, S. L., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Karshon, U., Mikenberg, G., Revel, D., Shapira, A., Wainer, N., Yekutieli, G., Baranko, G., Caldwell, A., Cherney, M., Izen, J. M., Muller, D., Ritz, S., Strom, S., Takashima, M., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

By seeking to identify magnetically charged particles by their trajectories in a magnetic field, we set limits on the production of monopoles and dyons, via the processe+e-??*?M ", of masses up to 17 GeV and of magnetic charges between 10 e and 70 e

Published
1988
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185. Inclusiveπ0 production bye+e− annihilation at 34.6 GeV center of mass energy

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Rosskamp, P., Vogel, E., Wallraff, W., Bock, B., Eisenmann, J., Fischer, H. M., Hartmann, H., Hilger, E., Jocksch, A., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Foster, B., Martin, A. J., Bernardi, E., Eisenberg, Y., Eskreys, A., Gather, K., Hultschig, H., Joos, P., Klima, B., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Montag, A., Notz, D., Shapira, A., Trines, D., Tymieniecka, T., Tysarczyk, G., Walczak, R., Wolf, G., Yekutieli, G., Zeuner, W., Kracht, T., Krasemann, H. L., Krueger, J., Lohrmann, E., Poelz, G., Poesnecker, K. -U., Binnie, D. M., Dornan, P. J., Garbutt, D. A., Jenkins, C., Jones, W. G., Sedgbeer, J. K., Shulman, J., Su, D., Watson, A. P., Barreiro, F., Ros, E., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Dauncey, P., Devenish, R., Heath, G., Mellor, D. J., Ratoff, P., Tomalin, I., Yelton, J. M., Lloyd, S. L., Forden, G. E., Hart, J. C., Hasell, D. K., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Neumann, B., Karshon, U., Mikenberg, G., Mir, R., Revel, D., Ronat, E., Wainer, N., Baranko, G., Caldwell, A., Cherney, M., Izen, J. M., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

The cross section for the processe+e-?p0+ anything has been measured at an average center of mass energy of 34.6 GeV for p0 energies between 0.7 and 17 GeV. The angular distribution for p0 energies larger than 2 GeV is of the formds/dO~1+Acos2?, withA=1.2±0.5. The ratio of p0 to p± production in the measured energy range is 2s(p0)/(s(p+)+s(p-))=1.13±0.18

Published
1986
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186. A measurement of theD0 lifetime

Author

Althoff, M., Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Rosskamp, P., Wallraff, W., Bock, B., Eisenmann, J., Fischer, H. M., Hartmann, H., Jocksch, A., Kolanoski, H., Mertens, V., Wedemeyer, R., Foster, B., Bernardi, E., Eisenberg, Y., Eskreys, A., Gather, K., Hultschig, H., Joos, P., Klima, B., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Revel, D., Ronat, E., Schütte, W., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Zeuner, W., Hilger, E., Kracht, T., Krasemann, H. L., Krüger, J., Lohrmann, E., Poelz, G., Pösnecker, K. -U., Binnie, D. M., Dornan, P. J., Garbutt, D. A., Jenkins, C., Jones, W. G., Sedgbeer, J. K., Su, D., Thomas, J., Wan Abdullah, W. A. T., Barreiro, F., Ros, E., Bowler, M. G., Bull, P., Cashmore, R. J., Dauncey, P., Devenish, R., Heath, G., Mellor, D. J., Ratoff, P., Yelton, J. M., Lloyd, S. L., Forden, G. E., Hart, J. C., Hasell, D. K., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Neumann, B., Karshon, U., Mikenberg, G., Mir, R., Montag, A., Yekutieli, G., Shapira, A., Baranko, G., Caldwell, A., Cherney, M., DeMille, D., Izen, J. M., Messersmith, J., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

We have determined theD0 lifetime from reconstructed vertices ofD0 mesons produced ine+e- annihilations at an average center of mass energy of 42.2 GeV. From fifteen events theD0 lifetime was determined to be (4.3-1.4+2.0±0.8)×10-13s.

Published
1986
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187. Vector meson production in the final stateK+K−π+π− of photon-photon collisions

Author

Althoff, M., Braunschweig, W., Gerhards, R., Kirschfink, J.F., Martyn, H. -U., Rosskamp, P., Wallraff, W., Bock, B., Eisenmann, J., Fischer, H.M., Hartmann, H., Jocksch, A., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Foster, B., Bernardi, E., Eisenberg, Y., Eskreys, A., Gather, K., Hultschig, H., Joos, P., Klima, B., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Revel, D., Ronat, E., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Zeuner, W., Hilger, E., Kracht, T., Krasemann, H. L., Krüger, J., Lohrmann, E., Poelz, G., Pösnecker, K. -U., Binnie, D. M., Dornan, P., Garbutt, D. A., Jenkins, C., Jones, W. G., Sedgbeer, J. K., Su, D., Thomas, J., Wan Abdullah, W. A. T., Barreiro, F., Ros, E., Bowler, M. G., Bull, P., Cashmore, R. J., Dauncey, P., Devenish, R., Heath, G., Mellor, D. J., Ratoff, P., Lloyd, S. L., Bell, K., Forden, G. E., Hart, J. C., Hasell, D. K., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Neumann, B., Karshon, U., Mikenberg, G., Montag, A., Mir, R., Duchovni, E., Shapira, A., Yekutieli, G., Baranko, G., Caldwell, A., Cherney, M., Izen, J. M., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Lan Wu, Sau, and Zobernig, G.

Abstract

Vector meson production is studied in the reaction ???K+K-p+p-. A clear F(1020) signal is seen in theK+K- mass distribution and aK*0 (890) signal is visible in theK±p± one. Both do not seem to be strongly correlated with quasi two body final states. Cross sections for the processes ???K+K-p+p-, ???Fp+p-, ???K+0K±p± and upper limits for the production of Fp, FF andK*0 " are given as function of the invariant ?? mass.

Published
1986
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188. Measurement of the radiative width of theA2(1320) in two-photon interactions

Author

Althoff, M., Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Rosskamp, P., Wallraff, W., Bock, B., Eisenmann, J., Fischer, H. M., Hartmann, H., Jocksch, A., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Foster, B., Bernardi, E., Eisenberg, Y., Eskreys, A., Gather, K., Hultschig, H., Joos, P., Klima, B., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Revel, D., Ronat, E., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Zeuner, W., Hilger, E., Kracht, T., Krasemann, H. L., Krüger, J., Lohrmann, E., Poelz, G., Pösnecker, K. U., Binnie, D. M., Dornan, P. J., Garbutt, D. A., Jenkins, C., Jones, W. G., Sedgbeer, J. K., Su, D., Thomas, J., Wan Abdullah, W. A. T., Barreiro, F., Ros, E., Bowler, M. G., Bull, P., Cashmore, R. J., Dauncey, P., Devenish, R., Heath, G., Mellor, D., Ratoff, P., Lloyd, S. L., Forden, G. E., Hart, J. C., Hasell, D. K., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Neumann, B., Karshon, U., Mikenberg, G., Mir, R., Montag, A., Shapira, A., Yekutieli, G., Baranko, G., Caldwell, A., Cherney, M., Izen, J. M., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Wu, Sau Lan, and Zonering, G.

Abstract

The reactione+e-?e+e- A2 (1320) has been observed by detecting the decayA2?p+,p-p0. The two-photon width of theA2 has been measured to be ?(A2???)=(0.09±0.27 (stat)±0.16 (syst)) keV. The cross section s(???p+,p-p0 has been determined outside theA2 resonance region.

Published
1986
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189. Measurement of the photon structure functionF2ψ atQ2 from 7 to 70 (GeV/c)2

Author

Althoff, M., Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. U., Rosskamp, P., Wallraff, W., Bock, B., Eisenmann, J., Fischer, H. M., Hartmann, H., Hillen, W., Jocksch, A., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Foster, B., Bernardi, E., Eisenberg, Y., Eskreys, A., Gather, K., Hultschig, H., Joos, P., Klima, B., Kowalski, H., Ladage, A., Löhr, B., Lueke, D., Mättig, P., Notz, D., Revel, D., Ronat, E., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Zeuner, W., Hilger, E., Kracht, T., Krasemann, H. L., Krüger, J., Lohrmann, E., Poelz, G., Pösnecker, K. U., Binnie, D. M., Dornan, P. J., Garbutt, D. A., Jenkins, C., Jones, W. G., Sedgbeer, J. K., Su, D., Thomas, J., Abdullah, W. A. T. Wan, Barreiro, F., Ros, E., Bowler, M. G., Bull, P., Cashmore, R. J., Dauncey, P., Devenish, R., Heath, G., Mellor, D. J., Lloyd, S. L., Forden, G. E., Hart, J. C., Hasell, D. K., Saxon, D. H., Brandt, S., Dittmar, M., Holder, M., Labarga, L., Neumann, B., Karshon, U., Mikenberg, G., Montag, A., Mir, R., Shapira, A., Yekutieli, G., Baranko, G., Caldwell, A., Cherney, M., Izen, J. M., Ritz, S., Strom, D., Takashima, M., Venkataramania, H., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

We have measured the processe+e−→e+e−+hadrons, where one of the scattered electrons was detected at large angles, withQ2 ranging from 7 to 70 (VeV/c)2. The photon structure functionF2γ(x, Q2) was determined at an averageQ2 of 23 (GeV/c)2. The measurements were compared to theoretical predictions of the Quark Parton Model and Quantum Chromodynamics. In both models a hadronic part was added. Within the errors the data are in agreement with the QPM using quark masses of 300 MeV/c2 for the light quarks. The data also agree with a QCD calculation including higher order corrections. A fit yielded a " value of 140−65+190 MeV, where the errors include statistical and systematic uncertainties.

Published
1986
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190. Angular correlations inγγ→ρ0ρ0 near threshold

Author

Althoff, M., Braunschweig, W., Gather, K., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. -U., Peise, G., Rimkus, J., Sander, H. G., Schmitz, D., Siebke, H., Trines, D., Wallraff, W., Boerner, H., Fischer, H. M., Hartmann, H., Hilger, E., Hillen, W., Knop, G., Köpke, L., Kolanoski, H., Wedemeyer, R., Wermes, N., Wollstadt, M., Burkhardt, H., Cooper, S., Franzke, J., Hultschig, H., Joos, P., Koch, W., Kötz, U., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Mess, K. H., Notz, D., Pyrlik, J., Quarrie, D. R., Riethmüller, R., Schütte, W., Söding, P., Wolf, G., Yekutieli, G., Dittmar, M., Fohrmann, R., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Römer, O., Schmüser, P., Wiik, B. H., Al-Agil, I., Beuselinck, R., Binnie, D. M., Campbell, A. J., Dornan, P. J., Garbutt, D. A., Jones, T. D., Jones, W. G., Lloyd, S. L., McCardle, J., Sedgebeer, J. K., Bell, K. W., Bowler, M. G., Brock, I. C., Cashmore, R. J., Carnegie, R., Clarke, P. E. L., Devenish, R., Grossmann, P., Illingworth, J., Salmon, G. L., Thomas, J., Wyatt, T. R., Youngman, C., Foster, B., Hart, J. C., Harvey, J., Proudfoot, J., Saxon, D. H., Woodworth, P. L., Heyland, D., Holder, M., Duchovni, E., Eisenberg, Y., Karshon, U., Mikenberg, G., Revel, D., Ronat, E., Shapira, A., Barklow, T., Meyer, T., Rudolph, G., Venkataramania, H., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

We present an analysis ofρ0ρ0 production by two photons in theρ0ρ0 invariant mass range from 1.2 to 2.0 GeV. From a study of the angular correlations in the process γγ→ρ0ρ0→π−π+π− we exclude a dominant contribution fromJP=0− or 2− states. The data indicate sizeable contributions fromJP=0+ for four pion massesM4π<1.7 GeV and fromJP=2+ forM4π>1.7 GeV. The data are also well described by a model with isotropic production and uncorrelated isotropic decay of theρ0,s. The cross section stays high below the nominalρ0ρ0 threshold, i.e.M4π<1.5 GeV. The matrix element forρ0ρ0 production is found to decrease steeply with increasingM4π. Upper limits for the couplings of the ι(1440) and Θ(1640) to γγ andρ0ρ0 are given:Γ(ι→γγ)·B(ι→ρ0ρ0)<1.0 keV andΓ(Θ→γγ)

Published
1982
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191. A measurement of muon pair production ine+e− annihilation at centre of mass energies 35.0≤ <img src="/fulltext-image.asp?format=htmlnonpaginated&src=M4221N1LN3801R3W_html\10052_2005_Article_BF01555879_TeX2GIFIE1.gi

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Hassard, J., Shulman, J., Su, D., Barreiro, F., Hervas, L., Leites, A., del Peso, J., Traseira, M., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Hawkes, C. M., Heath, G. P., Ratoff, P. N., Silvester, I. M., Tomalin, I. R., Veitch, M. E., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Duchovni, E., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Wainer, A. N., Yekutieli, G., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

The reactione+e−→µ+µ− has been studied at centre of mass energies between 35.0 and 46.8 GeV using the TASSO detector at PETRA. We present measurements of the forward-backward charge asymmetry (Aμμ) and cross section σμμ for this reaction at three energies. At 35.0 GeV we obtain a cross section relative to the QED prediction ofRμμ=σμμ/σo=0.932±0.018±0.044 andAμμ=(−10.6−2.3+2.2±0.5)%. At 38.3 GeV we findRμμ=0.951±0.072−0.057+0.063 andAμμ=(+1.7−8.6+8.5±0.5)%. At 43.6 GeV we measureRμμ=0.921±0.037±0.055 andAμμ=(−17.6−4.3+4.4±0.5)%. Our results are in good agreement with the predictions of the standard model. Including previous TASSO data we present improved determinations of muonic electroweak parameters. We also report on lower limits of possible contributions from contact interactions.

Published
1988
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192. Quantisation of the string fragmentation model

Author

Artru, X. and Bowler, M. G.

Abstract

We quantise the classical Artru-Mennessier string model with a Feynman sum over histories method. This procedure yields both propagation amplitudes and a Veneziano mass spectrum for mesons, with resonance poles for unstable states. Applied to the processe+e-?hadrons our amplitudes justify previous applications of string models and in particular the relative amplitudes for different string configurations are in agreement with a recent conjecture of Andersson and Hofmann which can account for the observed Bose-Einstein correlations ine+e- annihilation.

Published
1988
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193. A study of Bhabha scattering at PETRA energies

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Rosskamp, P., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Mertens, V., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eisenberg, Y., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Montag, A., Notz, D., Pawlak, J., Ronat, E., Ros, E., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Zeuner, W., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Pösnecker, K. -U., Binnie, D. M., Sedgbeer, J. K., Shulman, J., Su, D., Watson, A. T., Cerezo, J. P., Garcia, M. A., Leites, A., del Peso, J., de Troconiz, J. F., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Dauncey, P., Heath, G. P., Mellor, D. J., Ratoff, P., Tomalin, I., Yelton, J. M., Lloyd, S. L., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Karshon, U., Mikenberg, G., Revel, D., Shapira, A., Wainer, N., Yekutieli, G., Baranko, G., Caldwell, A., Izen, J. M., Muller, D., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

We report on high statistics Bhabha scattering data taken with the TASSO experiment at PETRA at center of mass energies from 12 GeV to 46.8 GeV. We present an analysis in terms of electroweak parameters of the standard model, give limits on QED cut-off parameters and look for possible signs of compositeness.

Published
1988
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194. Measurement of the average lifetime ofB hadrons

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Belk, A., Binnie, D. M., Hassard, J., Shulman, J., Su, D., Leites, A., del Peso, J., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Heath, G. P., Ratoff, P. N., Silvester, I. M., Tomalin, I. R., Veitch, M. E., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Caldwell, A., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

The average lifetime ofB hadrons has been measured by the TASSO collaboration using 110 pb-1 of data collected in 1986 at a center of mass energy of 35 GeV. Measurements by three different methods are presented and a method ofB-enrichment is discussed. The result of the impact parameter method is tB=1.36±0.13±0.28 ps, that of the vertex method is tB=1.30±0.10±0.28 ps and that of the dipole method is tB=1.47±0.14±0.30 ps. These are combined to give the result tB=1.35±0.10±0.24 ps.

Published
1989
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195. Effects of anions on cellular volume and transepithelial Na+ transport across toad urinary bladder

Author

Lewis, Simon A., Butt, A. Grant, Bowler, M. Joanne, Leader, John P., and Macknight, Anthony D. C.

Abstract

Summary The effects of complete substitution of gluconate for mucosal and/or serosal medium Cl− on transepithelial Na+ transport have been studied using toad urinary bladder. With mucosal gluconate, transepithelial potential difference (VT) decreased rapidly, transepithelial resistance (RT) increased, and calculated short-circuit current (Isc) decreased. CalculatedENa was unaffected, indicating that the inhibition of Na+ transport was a consequence of a decreased apical membrane Na+ conductance. This conclusion was supported by the finding that a higher amiloride concentration was required to inhibit the residual transport. With serosal gluconateVT decreased,RT increased andIsc fell to a new steady-state value following an initial and variable transient increase in transport. Epithelial cells were shrunken markedly as judged histologically. CalculatedENa fell substantially (from 130 to 68 mV on average). Ba2+ (3mm) reduced calculatedENa in Cl− Ringer's but not in gluconate Ringer's. With replacement of serosal Cl− by acetate, transepithelial transport was stimulated, the decrease in cellular volume was prevented andENa did not fall. Replacement of serosal isosmotic Cl− medium by a hypo-osmotic gluconate medium (one-half normal) also prevented cell shrinkage and did not result in inhibition of Na+ transport. Thus the inhibition of Na+ transport can be correlated with changes in cell volume rather than with the change in Cl− per se. Nystatin virtually abolished the resistance of the apical plasma membrane as judged by measurement of tissue capacitance. With K+ gluconate mucosa, Na+ gluconate serosa, calculated basolateral membrane resistance was much greater, estimated basolateral emf was much lower, and the Na+/K+ basolateral permeability ratio was much higher than with acetate media. It is concluded the decrease in cellular volume associated with substitution of serosal gluconate for Cl− results in a loss of highly specific Ba2+-sensitive K+ conductance channels from the basolateral plasma membrane. It is possible that the number of Na+ pump sites in this membrane is also decreased.

Published
1985
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196. Measurement of the asymmetry ofb quark production ine+e− annihilation at <img src="/fulltext-image.asp?format=htmlnonpaginated&src=J3312M2803551688_html\10052_2005_Article_BF01572023_TeX2GIFIE1.gif" border="

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Bernardi, E., Chwastowski, J., Eskreys, A., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Binnie, D., Hassard, J., Shulman, J., Su, D., Tomalin, I., Watson, A., Barreiro, F., Cases, G., Hervas, L., del Peso, J., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Veitch, M. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Eisenberg, Y., Karshon, U., Montag, A., Revel, D., Ronat, E., Wainer, N., Caldwell, A., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

The forward-backward asymmetry in the reaction e+e-→bb has been determined at centre of mass energies near 35 GeV using the TASSO detector. We report results from three different methods. The combined result of the measurements is " ignoring " mixing. Taking mixing into account leads to a corrected asymmetry of ". The axial vector coupling constant of theb quark as calculated from the corrected asymmetry isab=−1.2±0.5 to be compared with the valueabSM=−1 from the standard model.

Published
1990
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197. A study of energy-energy correlations between 12 and 46.8 GeV c.m. energies

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Rosskamp, P., Bock, B., Eisenmann, J., Fischer, H. M., Hartmann, H., Hilger, E., Jocksch, A., Mertens, V., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eisenberg, Y., Eskreys, A., Gather, K., Hultschig, H., Genser, K., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Montag, A., Notz, D., Pawlak, J., Ronat, E., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Zeuner, W., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Pösnecker, K. -U., Binnie, D. M., Sedgbeer, J. K., Shulman, J., Su, D., Watson, A. T., Leites, A., del Peso, J., Ros, E., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Dauncey, P., Heath, G. P., Mellor, D. J., Ratoff, P., Tomalin, I., Yelton, J. M., Lloyd, S. L., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Karshon, U., Mikenberg, G., Revel, D., Shapira, A., Wainer, N., Yekutieli, G., Baranko, G., Caldwell, A., Cherney, M., Izen, J. M., Muller, D., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

We present data on energy-energy correlations (EEC) and their related asymmetry (AEEC) ine+e- annihilation in the centre of mass energy range 12s2 QCD plus a fragmentation term proportional to ". BareO(a)s2 QCD reproduces our data for the large angle region of the AEEC. Nonperturbative effects for the latter are estimated with the help of fragmentation models. From various analyses using different approximations, we find that values for " in the range 0.1–0.3 GeV give a good description of the data. We also compare analytical calculations in QCD for the EEC in the back-to-back region to our data. The theoretical predictions describe well both the angular and energy dependence of the data in the back-to-back region.

Published
1987
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198. Measurement of the two-photon reactionγγ →π+π−π+π− at large values ofQ2

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Binnie, D. M., Hassard, J., Shulman, J., Su, D., Leites, A., del Peso, J., Balkwill, C., Bowler, M. G., Burrows, P. N., Heath, G. P., Ratoff, P. N., Silvester, I. M., Tomalin, I. R., Veitch, M. E., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Caldwell, A., Muller, D., Ritz, S., Strom, D., Takashima, M., Wicklund, E., Wu, Sau Lan, and Zobernig, G.

Abstract

The process γγ→π+π−π+π− has been investigated in reactions of the typee+e−→e+e−π+π−π+π− in the single tag mode. The range of the four momentum squared of one of the virtual photons was 0.28 GeV2/c2≦Q2≦3.6 GeV2/c2, the average being 〈Q2〉=0.92 GeV2/c2; the other photon was quasi real. The reaction is mainly described by the channels γγ→ρ0ρ0 and γγ→4π (phase space), occuring with about equal probability. TheQ2-dependence of the cross section is in agreement with the ρ form factor.

Published
1988
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199. Jet fragmentation and QCD models ine+e− annihilation at c.m. energies between 12.0 and 41.5 GeV

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Walczak, R., Wolf, G., Kolanoski, H., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Zeuner, W., Hassard, J., Shulman, J., Su, D., Barreiro, F., Leites, A., del Peso, J., Balkwill, C., Bowler, M. G., Burrows, P. N., Cashmore, R. J., Heath, G. P., Ratoff, P. N., Silvester, I. M., Tomalin, I. R., Veitch, M. E., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

The large amount of data accumulated by the TASSO detector at 35 GeV c.m. energy has been compared with the predictions of the latest generation of perturbative QCD+fragmentation models. By adjustment of the arbitrary parameters of these models, a very good description of the global properties of hadronic events was obtained. No one model gave the best description of all features of the data, each model being better than the others for some observables and worse in other quantities. We interpret these results in terms of the underlying QCD and hadronisation schemes. The trends of the data across the energy range 12.0?W?41.5 GeV are generally well reproduced by the models with the parameters optimised at 35 GeV.

Published
1988
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200. Evidence for direct photons from quarks in electron-positron annihilation

Author

Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. -U., Bock, B., Fischer, H. M., Hartmann, H., Hartmann, J., Hilger, E., Jocksch, A., Wedemeyer, R., Foster, B., Martin, A. J., Sephton, A. J., Barreiro, F., Bernardi, E., Chwastowski, J., Eskreys, A., Gather, K., Genser, K., Hultschig, H., Joos, P., Kowalski, H., Ladage, A., Löhr, B., Lüke, D., Mättig, P., Notz, D., Pawlak, J. M., Pösnecker, K. -U., Ros, E., Trines, D., Tymieniecka, T., Walczak, R., Wolf, G., Kolanoski, H., Gerhardt, W., Kracht, T., Krüger, J., Lohrmann, E., Poelz, G., Rehders, P., Tysarczyk, G., Zeuner, W., Hassard, J., Shulman, J., Su, D., Leites, A., del Peso, J., Balkwill, C., Bowler, M. G., Burrows, P. N., Heath, G. P., Ratoff, P., Silvester, I., Tomalin, I. R., Veitch, M. E., Forden, G. E., Hart, J. C., Saxon, D. H., Brandt, S., Holder, M., Labarga, L., Eisenberg, Y., Karshon, U., Mikenberg, G., Montag, A., Revel, D., Ronat, E., Shapira, A., Wainer, N., Yekutieli, G., Muller, D., Ritz, S., Strom, D., Takashima, M., Wu, Sau Lan, and Zobernig, G.

Abstract

Hadronic events frome+e--annihilations with a high energy isolated photon have been investigated at C.M. energies between 14 GeV and 44 GeV. A forward-backward asymmetryA? of the positively charged jet with respect to the incident positron direction has been found:A??=-0.32±0.07, providing evidence for photon bremsstrahlung from quarks. The forward-backward asymmetry of all hadronic events at C.M. energies between 30 GeV and 36 GeV has been measured. The value, corrected for the limited polar angle acceptance of the detector, is:A=+0.021±0.005.

Published
1988
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