Abstract
The cross sections for Bhabha and Møller scattering have been investigated in the energy range 2.1–2.4 MeV using monoenergetic positrons and electrons to search for hypothetical resonances superimposed to the continuum predicted by quantum electro dynamics. Bhabba-to-Mott, Møller-to-Mott and Møller-to-Bhabha cross section ratios were measured. The Bhabha-to-Mott ratios could be determined with statistical errors of typically 1% and remaining systematic errors not exceeding the statistical ones. No resonances in Bhabha scattering were observed. Limits for the intrinsic widths of hypothetical resonances are given. For the first time upper limits are deduced from our data for hypothetical resonances in the Møller scattering cross section in the MeV range. Additionally, Møller-to-Bhabha cross section ratios could be determined with good precision. A good agreement between the experimental and theoretical Møller-to-Bhabha ratios can be stated calling in question the recently predicted existence of series of narrow, unresolvable resonances in the Bhabha scattering cross section.
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Ashkin, A., Page, L.A., Woodward, W.M.: Phys. Rev.94, 357 (1954)
Bokemeyer, H., Koenig, W.: Preprint GSI-91-45; Kienle, P.: IN: [21], p. 63
Schäfer, A.: J. Phys. G15, 373 (1989); Phys. Lett. B175, 364 (1986)
Erb, K.A., Lee, I.Y., Milner, W.T.: Phys. Lett. B181, 52 (1986)
Peckhaus, P., Elze, Th.W., Happ, Th., Dresel, Th.: Phys. Rev. C36, 83 (1987)
Wang, T.F., Ahmad, I., Freedman, S.J., Janssens, R.V.F., Schiffer, J.P.: Phys. Rev. C36, 2136 (1987)
Bargholtz, C., Holmberg, L., Johansson, K.E., Liljequist, D., Tegnér, P.E., Bergström, L., Rubinstein, H.: J. Phys. G13, L265 (1987)
Bargholtz, C., Holmberg, L., Johansson, K.E., Liljequist, D., Tegnér, P.E., Vojdani, D.: Phys. Rev. C40, 1188 (1989)
Sakai, M., Fujita, Y., Imamura, M., Omata, K., Ohya, S., Miura, T.: Phys. Rev. C38, 1971 (1988)
Tsertos, H., Kozhuharov, C., Armbruster, P., Kienle, P., Krusche, B., Schreckenbach, K.: Phys. Lett. B207, 273 (1988)
Tsertos, H., Kozhuharov, C., Armbruster, P., Kienle, P., Krusche, B., Schreckenbach, K.: Z. Phys. A331, 103 (1988)
Tsertos, H., Kozhuharov, C., Armbruster, P., Kienle, P., Krusche, B., Schreckenbach, K.: Phys. Rev. D40, 1397 (1989)
van Klinken, J., Meiring, W.J., de Boer, F.W.N., Schaafsma, S.J., Wichers, V.A., van der Werf, S.J., Wierda, G.C.Th., Wilschut, H.W., Bokemeyer, H.: Phys. Lett. B205, 223 (1988)
Lorenz, E., Mageras, G., Stiegler, U., Huszar, I.: Phys. Lett. B214, 10 (1988)
Maier, K., Bauer, W., Briggmann, J., Carstanjen, H.D., Decker, W., Diehl, J., Heinemann, V., Major, J., Schaefer, H.-E., Seeger, A., Stoll, H., Wesolowski, P., Widmann, E., Bosch, F., Koenig, W.: Z. Phys. A326, 527 (1987)
Maier, K., Widmann, E., Bauer, W., Bosch, F., Briggmann, J., Carstanjen, H.D., Decker, W., Diehl, J., Feldmann, R., Keyerleber, B., Maden, D., Major, J., Schaefer, H.-E., Seeger, A., Stoll, H.: Z. Phys. A330, 173 (1988)
Kozhuharov, C., Tsertos, H., Armbruster, P., Kienle, P., Arnold, W., Bläsing, C., Göbel, R., Heil, R.D., Kneissl, U., Lindenstruth, S., Pecho, W., Schaschek, K., Seemann, U., Steiper, F., Stock, R., Weber, T., Wilke, W., Krusche, B., Schreckenbach, K.: GSI Scientific Report 1987 (GSI Report 88-01), 169 (1987)
Kienle, P.: Nucl. Phys. A478, 297c (1988)
Widmann, E., Bauer, W., Connell, S., Maier, K., Seeger, A., Stoll, H., Bosch, F.: Z. Phys. A340, 209 (1991)
Judge, S.M., Krusche, B., Schreckenbach, K., Tsertos, H., Kienle, P.: Phys. Rev. Lett.65, 972 (1990)
Tsertos, H., Kienle, P., Judge, S.M., Schreckenbach, K.: GSI Preprint 91-21 (1991)
Fackler, O., Trân Thanh Vân, J. (eds.): Tests of fundamental laws in Physics. Proceedings of the XXIVth Rencontre de Moriond, Les Arcs, Savoie 1989. Gif-sur-Yvette: Editions Frontières 1989
van Klinken, J., Bosch, F., Kneissl, U., Lorenz, E., Reinhardt, J., Schreckenbach, K.: In: [22], p. 147
Bokemeyer, H.: Habilitation Thesis, Universität Frankfurt am Main 1990; (GSI-Report-90-11)
Scherdin, A., Reinhardt, J., Greiner, W., Müller, B.: Rep. Prog. Phys.54, 1 (1991)
Geiger, K., Grabiak, M., Graf, O., Graf, S., Greiner, W., Hofmann, C., Ionescu, D.C., Müller, B., Reinhardt, J., de Reus, Th., Rumrich, K., Schäfer, A., Scherdin, A., Schramm, S., Soff, G.: In: [22], p. 107
Meyerhof, W.E., Molitoris, J.D., Danzmann, K., Spooner, D.W., Stephens, F.S., Diamond, R.M., Beck, E.M., Schäfer, A., Müller, B.: Phys. Rev. Lett.57, 2139 (1986)
Danzmann, K., Meyerhof, W.E., Montenegro, E.C., Xiang-Yuan Xu, Dillard, E., Hülskötter, H.P., Stephens, F.S., Diamond, R.M., Deleplanque, M.A., Machivelli, A.O., Schweppe, J., McDonald, R.J., Rude, B.S.: Phys. Rev. Lett.59, 1885 (1987)
Danzmann, K., Meyerhof, W.E., Montenegro, E.G., Dillard, E., Hülskötter, H.P., Guardala, N., Spooner, D.W., Kotlinski, B., Cline, D., Kavka, A., Beausang, C.W., Burde, J., Deleplanque, M.A., Diamond, R.M., McDonald, R.J., Machivelli, A.O., Rude, B.S., Stephens, F.S., Molitoris, J.D.: Phys. Rev. Lett.62, 2353 (1989)
Minowa, M., Orito, S., Tsuchiaki, M., Tsukamoto, T.: Phys. Rev. Lett.62, 1091 (1989)
Fox, J.D., Kemper, K.W., Cottle, P.D., Zingarelli, R.A.: Phys. Rev. C39, 288 (1988)
Connell, S.H., Fearick, R.W., Hoernle, A., Sideras-Haddad, E., Sellschop, J.P.F.: Phys. Rev. Lett.62, 2242 (1988)
Kramp, J., Gerl, J., Habs, D., Schwalm, D., Thirolf, P.: In: [22], p. 171
Kramp, J., Gerl, J., Habs, D., Schwalm, D., Thirolf, P.: Ann. Rep. 1989 Max-Planck-Institut für Kernphysik, Heidelberg, 62 (1990)
Arbuzov, B.A., Boos, E.E., Savrin, V.I., Shichanin, S.A.: JETP Lett.50, 236 (1989)
Arbuzov, B.A., Shichanin, S.A., Boos, E.E., Savrin, V.I.: Mod. Phys. Lett. A18, 1441 (1990)
Arbuzov, B.A., Boos, E.E., Savrin, V.I., Shichanin, S.A.: Phys.Lett. B240, 477 (1990)
Kneissl, U., Koop, E.A., Kuhl, G., Leister, K.H., Weller, A.: Nucl. Instrum. Methods127, 1 (1975)
Kneissl, U., Kuhl, G.: Nucl. Instrum. Methods87, 77 (1970)
Pecho, W.: Diploma Thesis, Universität Giessen (1988) (unpublished)
Arnold, W., Kneissl, U., Pecho, W., Weber, T.: Nucl. Instrum Methods A256, 189 (1987)
Frommhold, Th.: Diploma Thesis, Universität Giessen (1990) (unpublished)
Frommhold, Th., Arnold, W., Friedrichs, H., Göbel, R., Heil, R.D., Kneissl, U., Seemann, U., Steiper, F., Kozhuharov, C.: Nucl. Instrum. Methods A310, 657 (1991)
Göbel, R.: Thesis, Universität Giessen (1991) (unpublished)
Maier, K., Widmann, E., Bauer, W., Bosch, F., Briggmann, J., Carstanjen, H.D., Decker, W., Diehl, J., Fabritius, G., Keyerleber, B., Major, J., Schaefer, H.-E., Seeger, A., Stoll, H.: Proceedings of the VIIth International Conference on Positron Annihilation, Gent, Belgium, 1988, p. 171. Singapore: World Scientific 1989
Walet, N.R., Klein, A., Dreizler, R.M.: Phys. Lett. B273, 1 (1991)
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Supported by the Deutsche Forschungsgemeinschaft under contract Kn 154-19
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The authors are very grateful to M. Richter and H.G. Essel (GSI Darmstadt) for their kind help and advice concerning the GSI data acquisition and analysis system GOOSY. The financial support by the Deutsche Forschungsgemeinschaft under contracts Kn 154-19 is gratefully acknowledged.
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Göbel, R., Arnold, W., Frommhold, T. et al. Bhabha to Møller cross section ratios in the energy range 2.15–2.45 MeV. Z. Physik A - Hadrons and Nuclei 345, 79–88 (1993). https://doi.org/10.1007/BF01290343
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DOI: https://doi.org/10.1007/BF01290343