Search

Your search keyword '"B. Höistad"' showing total 59 results
Start Over Author "B. Höistad"
59 results on '"B. Höistad"'

52. An overview of experimental trends and systematics in pion production and absorption in nuclei

Author

B. Höistad

Subjects
Nuclear physics, Nuclear reaction, Physics, Particle physics, Pion, Meson, Reaction dynamics, Hadron, Nuclear structure, Elementary particle, Boson
Abstract

An experimental overview of the (p,π) reaction on nuclei is given, emphasizing systematic behaviour in the data in general. Specific features in the data which point to nuclear structure dependence as well as in influence from the reaction dynamics are also discussed.

Published
1982

53. Spectator tagging in quasi-free pn-reactions on deuterium at PROMICE/WASA, CELSIUS

Author

R. Bilger, W. Brodowski, H. Calen, H. Clement, V. Dunin, J. Dyring, C. Ekström, K. Fransson, J. Greiff, L. Gustafsson, S. Häggström, B. Höistad, J. Johanson, A. Johansson, T. Johansson, A. Khoukaz, K. Kilian, I. Koch, S. Kullander, A. Kupsc, P. Marciniewski, B. Morosov, T. Neubauer, W. Oelert, R. Ruber, B. Shwartz, J. Stepaniak, A. Sukhanov, P. Sundberg, A. Turowiecki, G. Wagner, Z. Wilhelmi, C. Wilkin, J. Zabierowski, A. Zernov, and J. Zlomanczuk

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Meson, Proton, Physics::Instrumentation and Detectors, Nuclear Theory, Hadron, Particle detector, Semiconductor detector, Nuclear physics, Deuterium, Neutron detection, Nuclear Experiment
Abstract

A set of silicon detectors has been added to the PROMICE/WASA (P/W) experiment at CELSIUS. These detectors have been used for spectator-proton tagging in proton deuteron collisions to investigate proton-neutron reactions at intermediate energies. The performance of the setup has been tested by measuring the pd --> d pi(o)p(spectator) reaction.

54. Observation of the rare eta-> e+ e- e+ e- decay with the KLOE experiment

Author

Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Balwierz, I., Bencivenni, G., Bini, Cesare, Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Capon, G., Capussela, T., Ceradini, F., Ciambrone, P., Czerwinski, E., Erika De Lucia, DE SANTIS, Antonio, De Simone, P., DE ZORZI, Guido, Denig, A., DI DOMENICO, Antonio, Di Donato, C., Di Micco, B., Dreucci, M., Felici, G., Fiore, Salvatore, Franzini, Paolo, Gatti, C., Gauzzi, Paolo, Giovannella, S., Graziani, E., Jacewicz, M., Lee Franzini, J., Martemianov, M., Martini, M., Massarotti, P., Meola, S., Miscetti, S., Morello, G., Moulson, M., Muller, S., Napolitano, M., Nguyen, F., Palutan, M., Passeri, A., Patera, Vincenzo, Prado Longhi, I., Santangelo, P., Sciascia, B., Silarski, M., Spadaro, T., Taccini, C., Tortora, L., Venanzoni, G., Versaci, R., Xu, G., Zdebik, J., Babusci, D., Badoni, D., Bocci, V., Budano, A., Bulychjev, S. A., Campana, P., Dane, E., De Robertis, G., Domenici, D., Erriquez, O., Fanizzi, G., Gonnella, F., Happacher, F., Hoistad, B., Iarocci, Enzo, Johansson, T., Kulikov, V., Kupsc, A., Loddo, F., Matsyuk, M., Messi, R., Moricciani, D., Moskal, P., Ranieri, A., Sarra, I., Schioppa, M., Sciubba, Adalberto, Wislicki, W., Wolke, M., Ambrosino, Fabio, A., Antonelli, M., Antonelli, F., Archilli, I., Balwierz, G., Bencivenni, C., Bini, C., Bloise, S., Bocchetta, F., Bossi, P., Branchini, G., Capon, Capussela, Tiziana, F., Ceradini, P., Ciambrone, E., Czerwiński, E., De Lucia, A., De Santi, P., De Simone, G., De Zorzi, A., Denig, A., Di Domenico, C., Di Donato, B., Di Micco, M., Dreucci, G., Felici, S., Fiore, P., Franzini, C., Gatti, P., Gauzzi, S., Giovannella, E., Graziani, M., Jacewicz, J., Lee Franzini, M., Martemianov, M., Martini, Massarotti, Paolo, S., Meola, S., Miscetti, G., Morello, M., Moulson, S., Müller, Napolitano, Marco, F., Nguyen, M., Palutan, A., Passeri, V., Patera, I., Prado Longhi, P., Santangelo, B., Sciascia, M., Silarski, T., Spadaro, C., Taccini, L., Tortora, G., Venanzoni, R., Versaci, G., Xu, J., Zdebik, D., Babusci, D., Badoni, V., Bocci, A., Budano, S. A., Bulychjev, P., Campana, E., Dané, G., De Roberti, D., Domenici, O., Erriquez, G., Fanizzi, F., Gonnella, F., Happacher, B., Höistad, E., Iarocci, T., Johansson, V., Kulikov, A., Kupsc, F., Loddo, M., Matsyuk, R., Messi, D., Moricciani, P., Moskal, A., Ranieri, I., Sarra, M., Schioppa, A., Sciubba, W., Wiślicki, and M., Wolke

Subjects
e(+)e(-) collisions, rare eta decays, e+e- collisions, rare η decays
Published
2011

55. Abashian-Booth-Crowe effect in basic double-pionic fusion: a new resonance?

Author

Adlarson P, Adolph C, Augustyniak W, Baru V, Bashkanov M, Bednarski T, Bergmann FS, Berłowski M, Bhatt H, Brinkmann KT, Büscher M, Calén H, Clement H, Coderre D, Czerwiński E, Doroshkevich E, Ekström C, Engels R, Erven W, Eyrich W, Fedorets P, Föhl K, Fransson K, Goldenbaum F, Goslawski P, Grigoryev K, Grishina V, Gullström CO, Hampe J, Hanhart C, Heijkenskjöld L, Hejny V, Hinterberger F, Hodana M, Höistad B, Jacewicz M, Janusz M, Jany A, Jany BR, Jarczyk L, Johansson T, Kamys B, Kemmerling G, Khakimova O, Khoukaz A, Kistryn S, Klaja J, Kleines H, Kłos B, Kren F, Krzemień W, Kulessa P, Kullander S, Kupść A, Lalwani K, Lorentz B, Magiera A, Maier R, Marciniewski P, Mariański B, Mikirtychiants M, Moskal P, Morsch HP, Nandi BK, Niedźwiecki S, Ohm H, Passfeld A, Pauly C, del Rio EP, Petukhov Y, Piskunov N, Pluciński P, Podkopał P, Povtoreyko A, Prasuhn D, Pricking A, Pysz K, Rausmann T, Redmer CF, Ritman J, Roy A, Ruber RJ, Rudy Z, Sawant S, Schadmand S, Schmidt A, Schroeder W, Sefzick T, Serdyuk V, Shah N, Siemaszko M, Siudak R, Skorodko T, Skurzok M, Smyrski J, Sopov V, Stassen R, Stepaniak J, Sterzenbach G, Stockhorst H, Ströher H, Szczurek A, Täschner A, Tolba T, Trzciński A, Varma R, Vlasov P, Wagner GJ, Węglorz W, Winnemöller A, Wirzba A, Wolke M, Wrońska A, Wüstner P, Wurm P, Yuan X, Yurev L, Zabierowski J, Zheng C, Zieliński MJ, Zipper W, Złomańczuk J, and Zuprański P

Abstract

We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn→dπ(0)π(0) over the full energy region of the ABC effect, a pronounced low-mass enhancement in the ππ-invariant mass spectrum. The measurements, which cover also the transition region to the conventional t-channel ΔΔ process, were performed with the upgraded WASA detector setup at COSY. The data reveal the Abashian-Booth-Crowe effect to be uniquely correlated with a Lorentzian energy dependence in the integral cross section. The observables are consistent with a narrow resonance with m=2.37  GeV, Γ≈70  MeV and I(J(P))=0(3(+)) in both pn and ΔΔ systems. Necessary further tests of the resonance interpretation are discussed.

Published
2011
Full Text
View/download PDF

56. Double-pionic fusion of nuclear systems and the "ABC" effect: approaching a puzzle by exclusive and kinematically complete measurements.

Author

Bashkanov M, Bargholtz C, Berłowski M, Bogoslawsky D, Calén H, Clement H, Demiroers L, Doroshkevich E, Duniec D, Ekström C, Fransson K, Geren L, Gustafsson L, Höistad B, Ivanov G, Jacewicz M, Jiganov E, Johansson T, Khakimova O, Keleta S, Koch I, Kren F, Kullander S, Kupść A, Lindberg K, Marciniewski P, Meier R, Morosov B, Pauly C, Pettersson H, Petukhov Y, Povtorejko A, Pricking A, Ruber RJ, Schönning K, Scobel W, Shwartz B, Skorodko T, Sopov V, Stepaniak J, Tegner PE, Thörngren-Engblom P, Tikhomirov V, Turowiecki A, Wagner GJ, Wolke M, Zabierowski J, Zartova I, and Złomanczuk J

Abstract

The ABC effect-a puzzling low-mass enhancement in the pipi invariant mass spectrum, first observed by Abashian, Booth, and Crowe-is well known from inclusive measurements of two-pion production in nuclear fusion reactions. Here we report on the first exclusive and kinematically complete measurements of the most basic double-pionic fusion reaction pn-->dpi;{0}pi;{0} at beam energies of 1.03 and 1.35 GeV. The measurements, which have been carried out at CELSIUS-WASA, reveal the ABC effect to be a (pipi)_{I=L=0} channel phenomenon associated with both a resonancelike energy dependence in the integral cross section and the formation of a DeltaDelta system in the intermediate state. A corresponding simple s-channel resonance ansatz provides a surprisingly good description of the data.

Published
2009
Full Text
View/download PDF

57. Exclusive measurement of the pp --> pppi(+)pi(-) reaction near threshold.

Author

Brodowski W, Bilger R, Calén H, Clement H, Ekström C, Fransson K, Greiff J, Häggström S, Höistad B, Johanson J, Johansson A, Johansson T, Kilian K, Kullander S, Kupść A, Marciniewski P, Morosov B, Oelert W, Pätzold J, Ruber RJ, Schepkin M, Scobel W, Seluzhenkov I, Stepaniak J, Sukhanov A, Turowiecki A, Wagner GJ, Wilhelmi Z, Zabierowski J, and Zlomanczuk J

Abstract

The pp-->pp pi(+) pi(-) reaction has been measured exclusively near threshold at CELSIUS. The total cross sections are nearly an order of magnitude lower than expected from previous inclusive measurements. The differential cross sections reveal pp-->pp(*)(1440)-->pp sigma = pp(pi(+)pi(-))(I = l = 0) as the dominant process as well as significant contributions from p(*)-->Delta(++)pi(-)-->psigma. The observed anisotropy in the proton angular dependence is consistent with heavy-meson exchange. In the invariant mass spectra, no narrow structures of statistical relevance (3sigma) are found.

Published
2002
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results