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201. Cross Sections of the Deuteron-Proton Breakup as a Probe of Three-Nucleon System Dynamics

Author

Kistryn, St., primary, Stephan, E., additional, Kalantar-Nayestanaki, N., additional, Biegun, A., additional, Kłos, B., additional, Sworst, R., additional, Bodek, K., additional, Ciepał, I., additional, Deltuva, A., additional, Epelbaum, E., additional, Fonseca, A. C., additional, Glöckle, W., additional, Golak, J., additional, Kamada, H., additional, Kiš, M., additional, Kozela, A., additional, Mahjour-Shafiei, M., additional, Micherdzińska, A., additional, Nogga, A., additional, Sauer, P. U., additional, Skibiński, R., additional, Witała, H., additional, Zejma, J., additional, Zipper, W., additional, Sakai, Hideyuki, additional, Sekiguchi, Kimiko, additional, and Gibson, Benjamin F., additional

Published
2008
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202. Direct Experimental Limit on Neutron–Mirror-Neutron Oscillations

Author

Ban, G., primary, Bodek, K., additional, Daum, M., additional, Henneck, R., additional, Heule, S., additional, Kasprzak, M., additional, Khomutov, N., additional, Kirch, K., additional, Kistryn, S., additional, Knecht, A., additional, Knowles, P., additional, Kuźniak, M., additional, Lefort, T., additional, Mtchedlishvili, A., additional, Naviliat-Cuncic, O., additional, Plonka, C., additional, Quéméner, G., additional, Rebetez, M., additional, Rebreyend, D., additional, Roccia, S., additional, Rogel, G., additional, Tur, M., additional, Weis, A., additional, Zejma, J., additional, and Zsigmond, G., additional

Published
2007
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203. Three-Nucleon Force Effects in Observables for $\overrightarrow d p$ Breakup at 130 MeV

Author

Biegun, A., primary, KŁos, B., additional, Micherdzińska, A., additional, Stephan, E., additional, Zipper, W., additional, Bodek, K., additional, Golak, J., additional, Kistryn, St., additional, Kuroś-ŻoŁnierczuk, J., additional, Skibiński, R., additional, Sworst, R., additional, WitaŁa, H., additional, Zejma, J., additional, Kozela, A., additional, Ermisch, K., additional, Kalantar-Nayestanaki, N., additional, Kiš, M., additional, Mahjour-Shafiei, M., additional, Glöckle, W., additional, Kamada, H., additional, Epelbaum, E., additional, Nogga, A., additional, Sauer, P., additional, and Deltuva, A., additional

Published
2007
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204. Muon decay: Measurement of the transverse e+ polarization and its implications on GF and time reversal invariance

Author

Fetscher, W., primary, Bodek, K., additional, Danneberg, N., additional, Jarczyk, L., additional, Kirch, K., additional, Kistryn, S., additional, Köhler, K., additional, Lang, J., additional, Kozela, A., additional, Schweizer, T., additional, Smyrski, J., additional, Stephan, E., additional, Strzałkowski, A., additional, von Allmen, A., additional, and Zejma, J., additional

Published
2007
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205. Evidence of the Coulomb-force effects in the cross-sections of the deuteron–proton breakup at 130 MeV

Author

Kistryn, St., primary, Stephan, E., additional, Kłos, B., additional, Biegun, A., additional, Bodek, K., additional, Ciepał, I., additional, Deltuva, A., additional, Fonseca, A.C., additional, Kalantar-Nayestanaki, N., additional, Kiš, M., additional, Kozela, A., additional, Mahjour-Shafiei, M., additional, Micherdzińska, A., additional, Sauer, P.U., additional, Sworst, R., additional, Zejma, J., additional, and Zipper, W., additional

Published
2006
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206. Measurement of the transverse e+ polarization from the decay of polarized and its implications on GF and time reversal invariance

Author

Fetscher, W., primary, Bodek, K., additional, Danneberg, N., additional, Jarczyk, L., additional, Kistryn, S., additional, Köhler, K., additional, Kirch, K., additional, Kozela, A., additional, Lang, J., additional, Smyrski, J., additional, Schweizer, T., additional, Stephan, E., additional, Strzałkowski, A., additional, Zejma, J., additional, and von Allmen, A., additional

Published
2005
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207. Systematic study of three-nucleon force effects in the cross section of the deuteron-proton breakup at 130 MeV

Author

Kistryn, St., primary, Stephan, E., additional, Biegun, A., additional, Bodek, K., additional, Deltuva, A., additional, Epelbaum, E., additional, Ermisch, K., additional, Glöckle, W., additional, Golak, J., additional, Kalantar-Nayestanaki, N., additional, Kamada, H., additional, Kiš, M., additional, Kłos, B., additional, Kozela, A., additional, Kuroś-Żołnierczuk, J., additional, Mahjour-Shafiei, M., additional, Meißner, U.-G., additional, Micherdzińska, A., additional, Nogga, A., additional, Sauer, P. U., additional, Skibiński, R., additional, Sworst, R., additional, Witała, H., additional, Zejma, J., additional, and Zipper, W., additional

Published
2005
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208. Muon Decay: Measurement of the Transverse Polarization of the Decay Positrons and its Implications for the Fermi Coupling Constant and Time Reversal Invariance

Author

Danneberg, N., primary, Fetscher, W., additional, Köhler, K.-U., additional, Lang, J., additional, Schweizer, T., additional, von Allmen, A., additional, Bodek, K., additional, Jarczyk, L., additional, Kistryn, S., additional, Smyrski, J., additional, Strzałkowski, A., additional, Zejma, J., additional, Kirch, K., additional, Kozela, A., additional, and Stephan, E., additional

Published
2005
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209. Evidence of three-nucleon force effects from130MeVdeuteron-proton breakup cross section measurement

Author

Kistryn, St., primary, Micherdzińska, A., additional, Bieber, R., additional, Biegun, A., additional, Bodek, K., additional, Ermisch, K., additional, Glöckle, W., additional, Golak, J., additional, Kalantar-Nayestanaki, N., additional, Kamada, H., additional, Kiš, M., additional, Kozela, A., additional, Kuroś-Żołnierczuk, J., additional, Nogga, A., additional, Mahjour-Shafiei, M., additional, Skibiński, R., additional, Stephan, E., additional, Witała, H., additional, Zejma, J., additional, and Zipper, W., additional

Published
2003
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210. Measurement of the polarization vector of thee from the decay of polarized as a test of time reversal invariance

Author

Fetscher, W, primary, Bodek, K, additional, Budzanowski, A, additional, Danneberg, N, additional, Hilbes, C, additional, Jarczyk, L, additional, Kirch, K, additional, Kistryn, S, additional, Klement, J, additional, K hler, K, additional, Kozela, A, additional, Lang, J, additional, Ll cer, G Llos, additional, Schweizer, T, additional, Smyrski, J, additional, Sromicki, J, additional, Stephan, E, additional, Strza kowski, A, additional, and Zejma, J, additional

Published
2003
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211. Polarized muon decay: Measurement of the polarization vector of the decay positrons as a test of time reversal invariance

Author

Fetscher, W., primary, Bodek, K., additional, Budzanowski, A., additional, Danneberg, N., additional, Hilbes, C., additional, Jarczyk, L., additional, Kirch, K., additional, Kistryn, S., additional, Klement, J., additional, Köhler, K., additional, Kozela, A., additional, Lang, J., additional, Morelle, X., additional, Schweizer, T., additional, Smyrski, J., additional, Sromicki, J., additional, Stephan, E., additional, Strzak̵owski, A., additional, and Zejma, J., additional

Published
2003
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213. Polarimetry of N-16(gs) produced in mu(-)-capture on O-16 nuclei

Author

UCL, Bee, CP, Conti, D, Hadri, M., Kistryn, S., Lang, J., Naviliatcuncic, O., Sromicki, J., Stephan, E., Bodek, K., Smyrski, J., Strzalkowski, A., Zejma, J., Grenacs, Laszlo, Abela, R., Boni, P., Foroughi, F., Zipper, W., Proykova, A., UCL, Bee, CP, Conti, D, Hadri, M., Kistryn, S., Lang, J., Naviliatcuncic, O., Sromicki, J., Stephan, E., Bodek, K., Smyrski, J., Strzalkowski, A., Zejma, J., Grenacs, Laszlo, Abela, R., Boni, P., Foroughi, F., Zipper, W., and Proykova, A.

Abstract

A polarimetry technique based on stack targets and beta-gamma-coincidences has been applied to the N-16 nuclei produced in the ground state capture of negative muons on O-16 nuclei. The performance of the polarimeter and the first measurements of beta-asymmetry due to the longitudinal nuclear polarization are discussed.

Published
1997

214. Contribution of three nucleon force investigated in deuteronproton breakup reaction.

Author

Kozela, A., Ciepał, I., Parol, W., Bodek, K., Khatri, G., Kistryn, St., Magiera, A., Rozpędzik, D., Wrońska, A., Zejma, J., Jamroz, B., Kłos, B., Rusnok, A., Stephan, E., Wilczek, A., Kalantar-Nayestanaki, N., Kuboś, J., Kulessa, P., Włoch, B., and Mazumdar, I.

Subjects
NUCLEON-nucleon interactions, DEUTERON scattering, ELASTIC scattering, LIQUID hydrogen, LUMINOSITY
Abstract

The elastic scattering and deuteron breakup data were collected in the experiment performed at KVI (Groningen) with use of unpolarized deuteron beam with energy of 80 MeV per nucleon, impinging on hydrogen target. The procedure applied to determine total integrated luminosity is presented. The result will be used for normalization of the differential cross section for the deuteron-proton breakup reaction. [ABSTRACT FROM AUTHOR]

Published
2016
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215. Three-Nucleon Force Effects in Observables for→dp Breakup at 130 MeV.

Author

Biegun, A., KŁos, B., Micherdzińska, A., Stephan, E., Zipper, W., Bodek, K., Golak, J., Kistryn, St., Kuroś-ŻoŁnierczuk, J., R. Skibiński, R., Sworst, R., WitaŁa, H., Zejma, J., Kozela, A., Ermisch, K., Kalantar-Nayestanaki, N., Kiš, M., Mahjour-Shafiei, M., Glöckle, W., and Kamada, H.

Subjects
PARTICLES (Nuclear physics), KINEMATICS, NUCLEON-nucleon scattering, PROTON-deuteron interactions, BEAMED-energy propulsion, CHIRAL perturbation theory
Published
2007

216. Measurement of the transverse polarization of the e+ from the decay of polarized μ+.

Author

Fetscher, W., Bodek, K., Budzanowski, A., Danneberg, N., Hilbes, C., Jarczyk, L., Kirch, K., Kistryn, S., Köhler, K., Lang, J., Kozela, A., Smyrski, J., Stephan, E., Strzalkowski, A., von Allmen, A., and Zejma, J.

Subjects
POLARIZATION (Nuclear physics), RADIATION, PARTICLES (Nuclear physics), POSITRONS, HOLES (Electron deficiencies), LEPTONS (Nuclear physics)
Abstract

The transverse polarization components of the positrons from the decay of polarized muons have been measured at the Paul Scherrer Institute by annihilating in flight the decay positrons with polarized electrons. The use of a stroboscopic method greatly reduces systematic errors. The energy dependence of the transverse polarization component PT1, which lies in the plane spanned by muon spin and positron momentum, yields the low energy parameter η and thus an improved model-independent value of the Fermi coupling constant. A non-zero value of the transverse component PT2, which is perpendicular to the plane mentioned above, would be the first observation of time reversal violation in a purely leptonic decay. Part of the data (40 × 108 annihilation events) have been evaluated. Both PT1 and PT2, averaged over the positrons’ energy, are consistent with zero with a precision improved by a factor of three as compared with the previous measurement. The preliminary results are = (7 ± 8) × 10-3, = (-1 ± 8) × 10-3 in full agreement with the standard model. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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217. Determination of the Polarization of the Decay Positrons in Polarized Muon Decay.

Author

Köhler, K.-U., Bodek, K., Budzanowski, A., Danneberg, N., Fetscher, W., Hilbes, C., Jarczyk, L., Kirch, K., Kistryn, S., Klement, J., Kozela, A., Lang, J., Llácer, G. Llosá, Schweizer, T., Smyrski, J., Stromicki, J., Stephan, E., Strzalkowski, A., and Zejma, J.

Subjects
POLARIZATION (Nuclear physics), POSITRONS, MUONS
Abstract

The standard model of electroweak interactions predicts that the positrons from the decay of polarized positive muons are mainly longitudinally polarized. The measurement of the two transverse polarization components of the positron PT1 and PT2 is a sensitive tool to look for contributions from additional, exotic interactions and for the violation of time reversal invariance in this purely leptonic decay. The μPT - experiment at the Paul Scherrer Institute determines the three positron polarization components simultaneously with the same apparatus by making use of three different effects. By examining the temporal dependence of annihilation-in-flight of the decay positrons with polarized electrons a possible non-zero value of the transverse polarization is determined. The phase of this transverse polarization can be measured by making use of the decay asymmetry. Using the dependence of annihilation-in-flight on the angle between electron polarization and positron momentum leads to the determination of the longitudinal polarization which not only completes the measurement of the entire polarization vector but also serves as a sensitivity check. In order to deduce the polarization at the time and location of the muon decay a method based on Monte-Carlo simulations with full spin-dependence implemented is being developed. © 2003 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2003
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218. Three-nucleon force effects in the dp-breakup at 130 MeV

Author

Kistryn, St., primary, Bieber, R., additional, Bodek, K., additional, Ermisch, K., additional, Glöckle, W., additional, Golak, J., additional, Harakeh, M.N., additional, Kalantar-Nayestanaki, N., additional, Kuroś-Zołnierczuk, J., additional, Kamada, H., additional, Micherdzińska, A., additional, Nogga, A., additional, Skibiński, R., additional, Sokołowski, M., additional, Stephan, E., additional, Strzałkowski, A., additional, Witała, H., additional, Zejma, J., additional, and Zipper, W., additional

Published
2001
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219. Search for three-nucleon force effects in dp-breakup reaction

Author

Bieber, R., primary, Bodek, K., additional, Ermisch, K., additional, Glöckle, W., additional, Golak, J., additional, Harakeh, M.N., additional, Kalantar-Nayestanaki, N., additional, Kistryn, St., additional, Kuroś-Żołnierczuk, J., additional, Lang, J., additional, Micherdzińska, A., additional, Skibiński, R., additional, Sokołowski, M., additional, Sromicki, J., additional, Stephan, E., additional, Strzałkowski, A., additional, Volkerts, M., additional, Witała, H., additional, Zejma, J., additional, and Zipper, W., additional

Published
2001
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220. Optimization Study for a Measurement of Polarization Observables in Mu(-)-capture On Nuclei

Author

UCL - Autre, Abela, R., Bodek, K., Boni, P., Foroughi, F., Grenacs, Laszlo, Jarczyk, L., Kistryn, S., Lang, J., Muller, R., Navert, S., Navillatcuncic, O., Proykova, A., Smyrski, J., Sromicki, J., Stephan, E., Strzalkowski, A., Zejma, J., Zipper, W., UCL - Autre, Abela, R., Bodek, K., Boni, P., Foroughi, F., Grenacs, Laszlo, Jarczyk, L., Kistryn, S., Lang, J., Muller, R., Navert, S., Navillatcuncic, O., Proykova, A., Smyrski, J., Sromicki, J., Stephan, E., Strzalkowski, A., Zejma, J., and Zipper, W.

Abstract

The experiment is aimed at a precise determination of the induced pseudoscalar form factor F-P in mu(-)-capture on O-16 nuclei via a measurement of the polarization observables P-av, P-L and T-2(0) The method uses the beta-decay asymmetry as an analyzer of the spin orientation of the produced N-16 nuclei. Several tests were performed in order to find optimal conditions for measurement with stack targets, sensitive to the recoil direction of the N-16 nuclei. In addition the possibility of measuring P-av using of a water-based target has been investigated.

Published
1995

221. Measurement of the transverse polarization of positrons from the decay of polarized muons: A status report

Author

Bodek, K., primary, Budzanowski, A., additional, Danneberg, N., additional, Fetscher, W., additional, Hilbes, C., additional, Janousch, M., additional, Jarczyk, L., additional, Kirch, K., additional, Kistryn, S., additional, Klement, J., additional, Köhler, K., additional, Kozela, A., additional, Lang, J., additional, Llosá Llácer, G., additional, Markiewicz, M., additional, Morelle, X., additional, Schweizer, T., additional, Smyrski, J., additional, Sromicki, J., additional, Stephan, E., additional, Strzałkowski, A., additional, and Zejma, J., additional

Published
2000
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222. Polarization in Mott Scattering of Multi-MeV Electrons from Heavy Nuclei

Author

Sromicki, J., primary, Bodek, K., additional, Conti, D., additional, Kistryn, St., additional, Lang, J., additional, Navert, S., additional, Naviliat-Cuncic, O., additional, Stephan, E., additional, Sys, C., additional, Zejma, J., additional, Haeberli, W., additional, Reichert, E., additional, and Steigerwald, M., additional

Published
1999
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223. Proton induced deuteron breakup reaction at 65 MeV: Unspecific configurations

Author

Bodek, K., primary, Glöckle, W., additional, Golak, J., additional, Jarczyk, L., additional, Kistryn, St., additional, Kozzłowska, B., additional, Lang, J., additional, Micherdzińska, A., additional, Naviliat-Cuncic, O., additional, Smyrski, J., additional, Sokołowski, M., additional, Sromicki, J., additional, Strzałkowski, A., additional, Witała, H., additional, Zejma, J., additional, and Zipper, W., additional

Published
1998
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224. Helicity structure in low- and intermediate-energy weak interaction

Author

Severijns, N., primary, Allet, M., additional, Bodek, K., additional, Brown, B.A., additional, Camps, J., additional, De Moor, P., additional, Deutsch, J., additional, Ferro-Luzzi, M., additional, Gimeno-Nogues, F., additional, Govaerts, J., additional, Holstein, B.R., additional, Kirchner, R., additional, Lang, J., additional, Müller, R., additional, Navert, S., additional, Naviliat-Cuncic, O., additional, Otto, T., additional, Pepe, I., additional, Prieels, R., additional, Quin, P.A., additional, Schuurmans, P., additional, Sromicki, J., additional, Stephan, E., additional, Thomas, E., additional, Van Geert, A., additional, Vanneste, L., additional, Vereecke, B., additional, and Zejma, J., additional

Published
1998
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225. Mott scattering of multi-MeV electrons from heavy nuclei

Author

Conti, D., primary, Navert, S., additional, Bodek, K., additional, Haeberli, W., additional, Kistryn, S., additional, Lang, J., additional, Naviliat, O., additional, Reichert, E., additional, Sromicki, J., additional, Steigerwald, M., additional, Stephan, E., additional, and Zejma, J., additional

Published
1998
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226. Cross sections and analyzing powersAyin the breakup reaction2H(p→,pp)nat 65 MeV: Star configurations

Author

Zejma, J., primary, Allet, M., additional, Bodek, K., additional, Lang, J., additional, Müller, R., additional, Navert, S., additional, Naviliat-Cuncic, O., additional, Sromicki, J., additional, Stephan, E., additional, Jarczyk, L., additional, Kistryn, St., additional, Smyrski, J., additional, Strzałkowski, A., additional, Glöckle, W., additional, Golak, J., additional, Hüber, D., additional, Witała, H., additional, and Schmelzbach, P. A., additional

Published
1997
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227. Search for right-handed weak currents in the β-asymmetry-polarization correlation from 12N decay

Author

Allet, M., primary, Bodek, K., additional, Camps, J., additional, Deutsch, J., additional, Ferro-Luzzi, M., additional, Gimeno-Nogues, F., additional, Govaerts, J., additional, Lang, J., additional, Müller, R., additional, Navert, S., additional, Naviliat-Cuncic, O., additional, Pepe, I., additional, Prieels, R., additional, Quin, P., additional, Severijns, N., additional, Sromicki, J., additional, Stephan, E., additional, Thomas, E., additional, and Zejma, J., additional

Published
1996
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228. Proton-Induced Deuteron Breakup at E lab P = 65 MeV in Quasi-Free Scattering Configurations

Author

Allet, M., primary, Bodek, K., additional, Hajdas, W., additional, Lang, J., additional, Müller, R., additional, Navert, S., additional, Naviliat-Cuncic, O., additional, Sromicki, J., additional, Zejma, J., additional, Jarczyk, L., additional, Kistryn, St., additional, Smyrski, J., additional, Strzalkowski, A., additional, Witala, H., additional, Glöckle, W., additional, Golak, J., additional, Hüber, D., additional, and Kamada, H., additional

Published
1996
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229. Effects of the Tucson-Melbourne three-nucleon force in the proton-deuteron breakup process at Ep = 65 MeV

Author

Allet, M., primary, Bodek, K., additional, Golak, J., additional, Glöckle, W., additional, Hajdas, W., additional, Hüber, D., additional, Jarczyk, L., additional, Kamada, H., additional, Kistryn, St., additional, Lang, J., additional, Müller, R., additional, Naviliat-Cuncic, O., additional, Smyrski, J., additional, Sromicki, J., additional, Strzałkowski, A., additional, Witała, H., additional, and Zejma, J., additional

Published
1996
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231. Cross section and analyzing power Ay in the 2H(p[downward right arrow],pp)n breakup reaction at 65 MeV; three-body force effects

Author

Allet, M., primary, Bodek, K., additional, Lang, J., additional, Müller, R., additional, Navert, S., additional, Naviliat-Cuncic, O., additional, Sromicki, J., additional, Stephan, E., additional, Zejma, J., additional, Golak, J., additional, Jarczyk, L., additional, Kistryn, St., additional, Smyrski, J., additional, Strzal̸kowski, A., additional, Wital̸a, H., additional, Glöckle, W., additional, and Hüber, D., additional

Published
1995
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232. Cross section and analyzing powerAyin the breakup reactionH2(p→,pp)nat 65 MeV: Collinearity configurations

Author

Allet, M., primary, Bodek, K., additional, Hajdas, W., additional, Lang, J., additional, Müller, R., additional, Naviliat-Cuncic, O., additional, Sromicki, J., additional, Zejma, J., additional, Jarczyk, L., additional, Kistryn, St., additional, Smyrski, J., additional, Strzałkowski, A., additional, Glöckle, W., additional, Golak, J., additional, Witała, H., additional, Dechant, B., additional, Krug, J., additional, and Schmelzbach, P. A., additional

Published
1994
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234. A New Positron Polarimeter

Author

Allet, M., primary, Bodek, K., additional, Deutsch, J., additional, Gimeno-Nogues, F., additional, Hajdas, W., additional, Lang, J., additional, Müller, Ralf, additional, Naviliat-Cuncic, O., additional, Pepe, I., additional, Prieels, R., additional, Quin, P.A., additional, Severijns, N., additional, Spiekerman, G., additional, Sromicki, J., additional, Thomas, E., additional, and Zejma, J., additional

Published
1992
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235. R- and N-correlation coefficients in neutron decay: Search for scalar and tensor couplings in weak interactions.

Author

Bodek, K., Ban, G., Białek, A., Gorel, P., Kirch, K., Kistryn, St., Kozela, A., Kúzniak, M., Naviliat-Cuncic, O., Severijns, N., Stephan, E., and Zejma, J.

Subjects
COLD neutrons, STANDARD model (Nuclear physics), NEUTRONS, POLARIZATION (Nuclear physics), POLARIZED electrons, SCATTERING (Physics), ACQUISITION of data, STATISTICAL correlation, PHYSICS experiments
Abstract

The decay correlation coefficients R and N have been measured with the aim to search for scalar and tensor admixtures to the V-A interaction dominating in the neutron decay. Both R and N are accessible in the two transverse components of the electron polarization which was analyzed with Mott scattering from lead nuclei. The analysis of data collected in four runs is in its final stage giving the preliminary results consistent with the Standard Model: R=0:005 _ 0:013(stat.) _ 0:005(syst.) and N=0:064 _ 0:012(stat.) _ 0:004(syst.), respectively. A possible future experiment leading to an accuracy improved by at least an order of magnitude and more systematic investigation of the electron spin related correlation coefficients is discussed as well. [ABSTRACT FROM AUTHOR]

Published
2011
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236. Cross Sections of the Deuteron-Proton Breakup at 130 MeV: A Probe of Three-Nucleon System Dynamics.

Author

Kistryn, St., Stephan, E., Kalantar-Nayestanaki, N., Biegun, A., Bodek, K., Ciepał, I., Deltuva, A., Eslami-Kalantari, M., Fonseca, A., Kiš, M., Kłos, B., Kozela, A., Mahjour-Shafiei, M., Messchendorp, J., Micherdzińska, A., Parol, W., Ramazani-Moghaddam-Arani, A., Sworst, R., and Zejma, J.

Subjects
NUCLEAR cross sections, DEUTERONS, PROTONS, PARTICLES (Nuclear physics), PARTICLE dynamics, PHYSICAL measurements, PHYSICS experiments
Abstract

Three-nucleon system dynamics can be investigated quantitatively by comparing observables calculated with the use of Faddeev equations with results of precise measurements. Proper description of the experimental data can be achieved only if the dynamical models include, in addition to the nucleon-nucleon interaction, subtle effects of suppressed degrees of freedom, effectively introduced by means of genuine three-nucleon forces. A large set of high precision, exclusive cross-section data for the H(d,pp)n breakup reaction at 130 MeV contributes significantly to constrain the physical assumptions underlying the theoretical interaction models. Comparison of nearly 1,800 cross section data points with the predictions using nuclear interactions generated in various ways, allowed to establish importance of including both, the three-nucleon and the Coulomb forces to significantly improve the description of the whole data set. [ABSTRACT FROM AUTHOR]

Published
2011
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237. FREE NEUTRON DECAY AND TIME REVERSAL VIOLATION.

Author

Kozela, A., Ban, G., Białek, A., Bodek, K., Gorel, P., Kirch, K., Kistryn, St., Kuźniak, M., Naviliat-Cuncic, O., Severijns, N., Stephan, E., and Zejma, J.

Subjects
RADIOACTIVE decay, NEUTRONS, POLARIZATION (Nuclear physics), NUCLEAR moments, WEAK interactions (Nuclear physics), STANDARD model (Nuclear physics)
Abstract

Both components of the transverse electron polarization have been measured in free neutron decay. The T-odd, P-odd correlation coefficient associated with polarization component perpendicular to the neutron polarization and electron momentum, was found to be R = 0:006 ± 0:012 ± 0:005. This value is consistent with time reversal invariance, and significantly improves limits on the relative strength of imaginary scalar couplings in the weak interaction. The value obtained for the T-even, P-even correlation coefficient connected with the second transversal polarization component, N = 0:065 ± 0:012 ± 0:004, agrees with the Standard Model expectation providing an important sensitivity test of the experimental setup. [ABSTRACT FROM AUTHOR]

Published
2011
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241. INFLUENCE OF THREE-NUCLEON FORCE EFFECTS ON POLARIZATION OBSERVABLES OF THE ¹H(d⃗, pp)n BREAKUP REACTION AT 130 MEV.

Author

Sworst, R., Kistryn, St., Stephan, E., Biegun, A., Bodek, K., Ciepał, I., Epelbaum, E., Gloeckle, W., Golak, J., Kalantar-Nayastenaki, N., Kamada, H., Kłos, B., Kozela, C., Nogga, A., Skibiński, R., Witała, H., Zejma, J., and Zipper, W.

Subjects
CALCULUS of tensors, NUCLEAR reactions, NUCLEON-nucleon interactions, CHIRALITY of nuclear particles, PHASE space
Abstract

High-precision vector and tensor breakup analyzing powers for the reaction ¹H(dd⃗, pp)n at 130 MeV were evaluated for a large phase space region. Results are compared with rigorous theoretical calculations based on realtic nucleon--nucleon potentials as well as on chiral perturbation theory approach. Theoretical predictions generally describe data quite well, only in a few cases influence of three-nucleon forces is significant. [ABSTRACT FROM AUTHOR]

Published
2008

242. Search for Time Reversal Violating Effects: R-Correlation Measurement in Neutron Decay.

Author

Bodek, K., Ban, G., Beck, M., Bialek, A., Bryś, T., Czarnecki, A., Fetscher, W., Gorel, P., Kirch, K., Kistryn, S. T., Kozela, A., Kuźniak, M., Lindroth, A., Naviliat-Cuncic, O., Pulut, J., Serebrov, A., Severijns, N., Stephan, E., and Zejma, J.

Subjects
POLARIZATION (Nuclear physics), ELECTRONS, NEUTRONS, PARTICLES (Nuclear physics), RADIATION
Abstract

An experiment aiming at the simultaneous determination of both transversal polarization components of electrons emitted in the decay of free neutrons begins data taking using the polarized cold neutron beam FUNSPIN) from the Swiss Neutron Spallation Source (SINQ) at the Paul- Scherrer Institute, Villigen. A non-zero value of R due to the e- polarization component, which is perpendicular to the plane spanned by the spin of the decaying neutron and the electron momentum, would signal a violation of time reversal symmetry and thus physics beyond the Standard Model. Present status of the project and the results from analysis of the first data sample will be discussed. [ABSTRACT FROM AUTHOR]

Published
2005
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243. FUNSPIN polarized cold-neutron beam at PSI

Author

Zejma, J., Ban, G., Beck, M., Białek, A., Bodek, K., Frei, G., Hilbes, Ch., Kühne, G., Gorel, P., Kirch, K., Kistryn, St., Kozela, A., Kuźniak, M., Lindroth, A., Naviliat-Cuncic, O., Pulut, J., Severijns, N., and Stephan, E.

Subjects
*PARTICLES (Nuclear physics), *POLARIZATION (Nuclear physics), *OPTICAL polarization, *SCIENTIFIC photography
Abstract

Abstract: Properties of the cold-neutron beam at the FUNSPIN facility of the SINQ neutron source of the Paul Scherrer Institute, Villigen, Switzerland were investigated. The measured flux density , the wavelength averaged mean polarization around the beam axis and the mean polarization over the full beam cross-section are the main attributes of this powerful facility for fundamental particle physics experiments with slow neutrons. [Copyright &y& Elsevier]

Published
2005
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244. Experimental Investigation of the Few-Nucleon Dynamics in Deuteron-Deuteron Collision at 160 MeV.

Author

Khatri, G., Bodek, K., Ciepał, I., Kalantar-Nayestanaki, N., Kistryn, St., Kłos, B., Kozela, A., Magiera, A., Mazumdar, I., Messchendorp, J., Parol, W., Rozpędzik, D., Skwira-Chalot, I., Stephan, E., Wrońska, A., and Zejma, J.

Subjects
DEUTERONS, DEUTERON scattering, ELASTIC scattering, PARTICLES (Nuclear physics), NUCLEAR cross sections, DIFFERENTIAL cross sections
Abstract

An experiment, with unpolarized deuteron beam of 160 MeV impinging on liquid deuterium target, was carried out using BINA detector at KVI, in Groningen, the Netherlands. Data were collected for the purpose of obtaining high precision differential cross-section for the deuteron break-up reaction. The elastic scattering data were also collected alongside for the purpose of cross-section normalization. We present here a sample of the un-normalised cross-section for the three-body final state (dd→dpn) reaction. [ABSTRACT FROM AUTHOR]

Published
2014
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245. Proton-Induced Deuteron Breakup Reaction at 65 MeV: Unspecific Configurations.

Author

Bodek, K., Golak, J., Jarczyk, L., Kistryn, St., Kuroś-Żołnierczuk, J., Lang, J., Micherdzińska, A., Skibiński, R., Smyrski, J., Sokołowski, M., Sromicki, J., Strzałkowski, A., Witała, H., Zejma, J., and Zipper, W.

Abstract

Cross sections and vector-analyzing powers for four unspecific configurations of the 2H( p, pp) n breakup reaction at E lab p = 65MeV were measured in a kinematically complete experiment. Measured observables are compared with rigorous Faddeev calculations using four realistic charge-dependent interaction models, the CD Bonn, Argonne v18, Nijmegen I, and Nijmegen II potentials with or without inclusion of the Tucson-Melbourne three-nucleon force. Coulomb effects are completely omitted. A satisfactory agreement between theory and experiment has been found. There exist, however, some discrepancies between measured and calculated analyzing-power distributions in certain kinematical regions. The effects of the Tucson-Melbourne three-body force are either negligible or slightly increasing the disagreement. [ABSTRACT FROM AUTHOR]

Published
2001
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247. Muon decay: Measurement of the transverse e+ polarization and its implications on GF and time reversal invariance.

Author

Fetscher, W., Bodek, K., Danneberg, N., Jarczyk, L., Kirch, K., Kistryn, S., Köhler, K., Lang, J., Kozela, A., Schweizer, T., Smyrski, J., Stephan, E., Strzałkowski, A., von Allmen, A., and Zejma, J.

Subjects
MUONS, POLARIZATION (Nuclear physics), POSITRONS, ELECTRONS, PARTICLES (Nuclear physics)
Abstract

The transverse polarization components of the positrons from the decay of polarized muons have been measured at the Paul Scherrer Institute by annihilating in flight the decay positrons with polarized electrons. The use of a stroboscopic method greatly reduces systematic errors. The energy dependence of the transverse polarization component PT1, which lies in the plane defined by muon spin and positron momentum, yields the low energy parameter η = (-2 ± 8) × 10 -3 and thus an improved model-independent value of the Fermi coupling constant. For the transverse polarization PT2, averaged over the positron energy, we obtain = (-4 ± 8) × 10-3. This improves the previous limit on the violation of time invariance in muon decay by a factor of three. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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248. Search for Time Reversal Violation in Neutron Decay: A Measurement of the Transverse Polarization of Electrons.

Author

Bodek, K., Kaczmarek, A., Kistryn, St., Kuźniak, M., Pulut, J., Zejma, J., Kirch, K., Białek, A., Kozela, A., Ban, G., Gorel, P., Naviliat-Cuncic, O., Beck, M., Lindroth, A., Severijns, N., Stephan, E., and Czarnecki, A.

Subjects
NEUTRONS, POLARIZED electrons, NUCLEAR reactions, PARTICLES (Nuclear physics), POLARIZATION (Nuclear physics)
Abstract

A non-zero value of the R-correlation coefficient due to the e - polarization component, perpendicular to the plane spanned by the spin of the decaying neutron and the electron momentum, would signal a violation of time reversal symmetry and thus physics beyond the Standard Model. The value of the N-correlation coefficient, given by the transverse e - polarization component within that plane, is expected to be finite. The measurement of N serves as an important systematic check of the apparatus for the R-measurement. The first phase of data taking has been completed. Preliminary results from a limited data sample show no deviations from the Standard Model predictions. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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249. Cross sections of the deuteron-proton breakup at 130 MeV.

Author

Kistryn, St., Biegun, A., Stephan, E., Kłos, B., Bodek, K., Ermisch, K., Glöckle, W., Golak, J., Kalantar-Nayestanaki, N., Kamada, H., Kis, M., Kozela, A., Kuroś-Żołnierczuk, J., Micherdzińska, A., Mahjour-Shafiei, M., Nogga, A., Skibiński, R., Sworst, R., Witała, H., and Zejma, J.

Subjects
NUCLEAR cross sections, COLLISIONS (Nuclear physics), DEUTERONS, PROTONS, ATOMS, NUCLEAR physics
Abstract

Comparison of the cross sections measured over a large part of the phase space of the deuteron-proton breakup at 130 MeV with the results of rigorous, Faddeev-like calculations is presented. Global analysis, including nearly 1200 data points, reveals a better agreement for theoretical predictions which include three-nucleon force (3NF) model over the results obtained with only nucleon-nucleon realistic potentials. A possible way to probe details of the 3NF models via studying “non-standard” projections of the multi-dimensional phase space is envisaged. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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250. Proton-Induced Deuteron Breakup at E = 65 MeV in Quasi-Free Scattering Configurations.

Author

Allet, M., Bodek, K., Hajdas, W., Lang, J., Müller, R., Navert, S., Naviliat-Cuncic, O., Sromicki, J., Zejma, J., Jarczyk, L., Kistryn, St., Smyrski, J., Strzalkowski, A., Witala, H., Glöckle, W., Golak, J., Hüber, D., and Kamada, H.

Abstract

The proton-deuteron breakup cross sections and analyzing powers A for three kinematically complete configurations in a quasi-free-scattering geometry have been measured at E = 65 MeV. The data are compared with predictions of rigorous Faddeev calculations using the Argonne AV14, Bonn-B, Nijmegen-78, and Paris potentials. A satisfactory agreement between theory and experimental data, both for cross sections and analyzing powers, has been found. [ABSTRACT FROM AUTHOR]

Published
1996
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