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A measurement of asymmetry in the decay {Lambda}{sub c}{sup +} {yields} {Lambda}{pi}{sup +}

Technical Report:

Abstract

Using the ARGUS detector at the e{sup +}e{sup -} storage ring DORIS II at DESY, we have observed parity violation in the decay {Lambda}{sup {+-}}{sub c} {yields} {Lambda}{pi}{sup -}{+-}. We measure the coefficient of parity violation, {alpha}{sub {Lambda}c}, to be -0.96 {+-} 0.42. In addition, we measure {sigma}xBR({Lambda}{sup +}{sub c} {yields} {Lambda}{pi}{sup +}) and {sigma}xBR({Lambda}{sup +}{sub c} {yields} {Sigma}{sup o}{pi}{sup +}) to be, respectively, (2.2 {+-} 0.3 {+-} 0.4) pb and (1.8 {+-} 0.5 {+-} 0.3) pb. (orig.).
Authors:
Albrecht, H; Ehrlichmann, H; Hamacher, T; Krueger, A; Nau, A; Nippe, A; Reidenbach, M; Schaefer, M; Schroeder, H; Schulz, H D; Sefkow, F; Wurth, R; [1]  Appuhn, R D; Hast, C; Herrera, G; Kolanoski, H; Lange, A; Lindner, A; Mankel, R; Schieber, M; Siegmund, T; Spaan, B; Thurn, H; Toepfer, D; Walther, A; Wegener, D; [2]  Paulini, M; Reim, K; Volland, U; Wegener, H; [3]  Mundt, R; Oest, T; Schmidt-Parzefall, W; [4]  Funk, W; Stiewe, J; Werner, S; [5]  Ball, S; Gabriel, J C; Geyer, C; Hoelscher, A; Hofmann, W; Holzer, B; Khan, S; Knoepfle, K T; Spengler, J; [6]  Britton, D I; Charlesworth, C E.K.; Edwards, K W; Kapitza, H; Krieger, P; Kutschke, R; MacFarlane, D B; Orr, R S; Patel, P M; Prentice, J D; Seidel, S C; Tsipolitis, G; Tzamariudaki, K; Van de Water, R G; Yoon, T S; [7]  Ressing, D; Schael, S; Schubert, K R; Strahl, K; Waldi, R; Weseler, S; [8]  Bostjancic, B; Kernel, G; Krizan, P; Kriznic, E; Podobnik, T; Zivko, T; [9]  Cronstroem, H I; Joensson, L; [10]  Balagura, V; Danilov, M; Droutskoy, A; Fominykh, B; Golutvin, A; Gorelov, I; Ratnikov, F; Lubimov, V; Pakhlov, P; Rostovtsev, A; Semenov, A; Semenov, S; Shevchenko, V; Soloshenko, V; Tichomirov, I; Zaitsev, Yu; [11]  Childers, R; Darden, C W; [12]  ARGUS Collaboration
  1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  2. Dortmund Univ. (Germany). Inst. fuer Physik
  3. Erlangen-Nuernberg Univ., Erlangen (Germany). Physikalisches Inst.
  4. Hamburg Univ. (Germany). 2. Inst. fuer Experimentalphysik
  5. Heidelberg Univ. (Germany). Inst. fuer Hochenergiephysik
  6. Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany)
  7. Institute of Particle Physics (Canada)
  8. Karlsruhe Univ. (T.H.) (Germany). Inst. fuer Experimentelle Kernphysik
  9. Inst. J. Stefan, Ljubljana (Yugoslavia)
  10. Lund Univ. (Sweden). Inst. of Physics
  11. Institute for Theoretical and Experimental Physics, Moscow (USSR)
  12. South Carolina Univ., Columbia, SC (United States)
Publication Date:
Aug 01, 1991
Product Type:
Technical Report
Report Number:
DESY-91-091
Reference Number:
SCA: 662360; 662120; 662310; PA: DEN-92:000569; SN: 92000645448
Resource Relation:
Other Information: PBD: Aug 1991
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; P INVARIANCE; WEAK HADRONIC DECAY; LAMBDA C PLUS BARYONS; ELECTRON-POSITRON INTERACTIONS; ANNIHILATION; SYMMETRY BREAKING; INTEGRAL CROSS SECTIONS; GEV RANGE 10-100; LAMBDA PARTICLES; POLARIZATION-ASYMMETRY RATIO; POLARIZED PRODUCTS; INCLUSIVE INTERACTIONS; PARTICLE PRODUCTION; PIONS PLUS; BRANCHING RATIO; ANGULAR DISTRIBUTION; EXPERIMENTAL DATA; EFFECTIVE MASS; MASS SPECTRA; SIGMA NEUTRAL PARTICLES; 662360; 662120; 662310; DECAYS OF BARYONS; SYMMETRY, CONSERVATION LAWS, CURRENTS AND THEIR PROPERTIES; WEAK AND ELECTROMAGNETIC INTERACTIONS OF LEPTONS
OSTI ID:
10114413
Research Organizations:
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE92759150; CNN: Contract BMFT 054DO51P; BMFT 054ER12P; BMFT 055HD21P; BMFT 054KA17P; DE-AS09-80ER10690; TRN: DE9200569
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
12 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Albrecht, H, Ehrlichmann, H, Hamacher, T, Krueger, A, Nau, A, Nippe, A, Reidenbach, M, Schaefer, M, Schroeder, H, Schulz, H D, Sefkow, F, Wurth, R, Appuhn, R D, Hast, C, Herrera, G, Kolanoski, H, Lange, A, Lindner, A, Mankel, R, Schieber, M, Siegmund, T, Spaan, B, Thurn, H, Toepfer, D, Walther, A, Wegener, D, Paulini, M, Reim, K, Volland, U, Wegener, H, Mundt, R, Oest, T, Schmidt-Parzefall, W, Funk, W, Stiewe, J, Werner, S, Ball, S, Gabriel, J C, Geyer, C, Hoelscher, A, Hofmann, W, Holzer, B, Khan, S, Knoepfle, K T, Spengler, J, Britton, D I, Charlesworth, C E.K., Edwards, K W, Kapitza, H, Krieger, P, Kutschke, R, MacFarlane, D B, Orr, R S, Patel, P M, Prentice, J D, Seidel, S C, Tsipolitis, G, Tzamariudaki, K, Van de Water, R G, Yoon, T S, Ressing, D, Schael, S, Schubert, K R, Strahl, K, Waldi, R, Weseler, S, Bostjancic, B, Kernel, G, Krizan, P, Kriznic, E, Podobnik, T, Zivko, T, Cronstroem, H I, Joensson, L, Balagura, V, Danilov, M, Droutskoy, A, Fominykh, B, Golutvin, A, Gorelov, I, Ratnikov, F, Lubimov, V, Pakhlov, P, Rostovtsev, A, Semenov, A, Semenov, S, Shevchenko, V, Soloshenko, V, Tichomirov, I, Zaitsev, Yu, Childers, R, Darden, C W, and ARGUS Collaboration. A measurement of asymmetry in the decay {Lambda}{sub c}{sup +} {yields} {Lambda}{pi}{sup +}. Germany: N. p., 1991. Web.
Albrecht, H, Ehrlichmann, H, Hamacher, T, Krueger, A, Nau, A, Nippe, A, Reidenbach, M, Schaefer, M, Schroeder, H, Schulz, H D, Sefkow, F, Wurth, R, Appuhn, R D, Hast, C, Herrera, G, Kolanoski, H, Lange, A, Lindner, A, Mankel, R, Schieber, M, Siegmund, T, Spaan, B, Thurn, H, Toepfer, D, Walther, A, Wegener, D, Paulini, M, Reim, K, Volland, U, Wegener, H, Mundt, R, Oest, T, Schmidt-Parzefall, W, Funk, W, Stiewe, J, Werner, S, Ball, S, Gabriel, J C, Geyer, C, Hoelscher, A, Hofmann, W, Holzer, B, Khan, S, Knoepfle, K T, Spengler, J, Britton, D I, Charlesworth, C E.K., Edwards, K W, Kapitza, H, Krieger, P, Kutschke, R, MacFarlane, D B, Orr, R S, Patel, P M, Prentice, J D, Seidel, S C, Tsipolitis, G, Tzamariudaki, K, Van de Water, R G, Yoon, T S, Ressing, D, Schael, S, Schubert, K R, Strahl, K, Waldi, R, Weseler, S, Bostjancic, B, Kernel, G, Krizan, P, Kriznic, E, Podobnik, T, Zivko, T, Cronstroem, H I, Joensson, L, Balagura, V, Danilov, M, Droutskoy, A, Fominykh, B, Golutvin, A, Gorelov, I, Ratnikov, F, Lubimov, V, Pakhlov, P, Rostovtsev, A, Semenov, A, Semenov, S, Shevchenko, V, Soloshenko, V, Tichomirov, I, Zaitsev, Yu, Childers, R, Darden, C W, & ARGUS Collaboration. A measurement of asymmetry in the decay {Lambda}{sub c}{sup +} {yields} {Lambda}{pi}{sup +}. Germany.
Albrecht, H, Ehrlichmann, H, Hamacher, T, Krueger, A, Nau, A, Nippe, A, Reidenbach, M, Schaefer, M, Schroeder, H, Schulz, H D, Sefkow, F, Wurth, R, Appuhn, R D, Hast, C, Herrera, G, Kolanoski, H, Lange, A, Lindner, A, Mankel, R, Schieber, M, Siegmund, T, Spaan, B, Thurn, H, Toepfer, D, Walther, A, Wegener, D, Paulini, M, Reim, K, Volland, U, Wegener, H, Mundt, R, Oest, T, Schmidt-Parzefall, W, Funk, W, Stiewe, J, Werner, S, Ball, S, Gabriel, J C, Geyer, C, Hoelscher, A, Hofmann, W, Holzer, B, Khan, S, Knoepfle, K T, Spengler, J, Britton, D I, Charlesworth, C E.K., Edwards, K W, Kapitza, H, Krieger, P, Kutschke, R, MacFarlane, D B, Orr, R S, Patel, P M, Prentice, J D, Seidel, S C, Tsipolitis, G, Tzamariudaki, K, Van de Water, R G, Yoon, T S, Ressing, D, Schael, S, Schubert, K R, Strahl, K, Waldi, R, Weseler, S, Bostjancic, B, Kernel, G, Krizan, P, Kriznic, E, Podobnik, T, Zivko, T, Cronstroem, H I, Joensson, L, Balagura, V, Danilov, M, Droutskoy, A, Fominykh, B, Golutvin, A, Gorelov, I, Ratnikov, F, Lubimov, V, Pakhlov, P, Rostovtsev, A, Semenov, A, Semenov, S, Shevchenko, V, Soloshenko, V, Tichomirov, I, Zaitsev, Yu, Childers, R, Darden, C W, and ARGUS Collaboration. 1991. "A measurement of asymmetry in the decay {Lambda}{sub c}{sup +} {yields} {Lambda}{pi}{sup +}." Germany.
@misc{etde_10114413,
title = {A measurement of asymmetry in the decay {Lambda}{sub c}{sup +} {yields} {Lambda}{pi}{sup +}}
author = {Albrecht, H, Ehrlichmann, H, Hamacher, T, Krueger, A, Nau, A, Nippe, A, Reidenbach, M, Schaefer, M, Schroeder, H, Schulz, H D, Sefkow, F, Wurth, R, Appuhn, R D, Hast, C, Herrera, G, Kolanoski, H, Lange, A, Lindner, A, Mankel, R, Schieber, M, Siegmund, T, Spaan, B, Thurn, H, Toepfer, D, Walther, A, Wegener, D, Paulini, M, Reim, K, Volland, U, Wegener, H, Mundt, R, Oest, T, Schmidt-Parzefall, W, Funk, W, Stiewe, J, Werner, S, Ball, S, Gabriel, J C, Geyer, C, Hoelscher, A, Hofmann, W, Holzer, B, Khan, S, Knoepfle, K T, Spengler, J, Britton, D I, Charlesworth, C E.K., Edwards, K W, Kapitza, H, Krieger, P, Kutschke, R, MacFarlane, D B, Orr, R S, Patel, P M, Prentice, J D, Seidel, S C, Tsipolitis, G, Tzamariudaki, K, Van de Water, R G, Yoon, T S, Ressing, D, Schael, S, Schubert, K R, Strahl, K, Waldi, R, Weseler, S, Bostjancic, B, Kernel, G, Krizan, P, Kriznic, E, Podobnik, T, Zivko, T, Cronstroem, H I, Joensson, L, Balagura, V, Danilov, M, Droutskoy, A, Fominykh, B, Golutvin, A, Gorelov, I, Ratnikov, F, Lubimov, V, Pakhlov, P, Rostovtsev, A, Semenov, A, Semenov, S, Shevchenko, V, Soloshenko, V, Tichomirov, I, Zaitsev, Yu, Childers, R, Darden, C W, and ARGUS Collaboration}
abstractNote = {Using the ARGUS detector at the e{sup +}e{sup -} storage ring DORIS II at DESY, we have observed parity violation in the decay {Lambda}{sup {+-}}{sub c} {yields} {Lambda}{pi}{sup -}{+-}. We measure the coefficient of parity violation, {alpha}{sub {Lambda}c}, to be -0.96 {+-} 0.42. In addition, we measure {sigma}xBR({Lambda}{sup +}{sub c} {yields} {Lambda}{pi}{sup +}) and {sigma}xBR({Lambda}{sup +}{sub c} {yields} {Sigma}{sup o}{pi}{sup +}) to be, respectively, (2.2 {+-} 0.3 {+-} 0.4) pb and (1.8 {+-} 0.5 {+-} 0.3) pb. (orig.).}
place = {Germany}
year = {1991}
month = {Aug}
}