Measurement of the decay asymmetry parameters in Lambda(c)+ ---> Lambda pi+ and Lambda(c)+ ---> Sigma+ pi0
- CLEO Collaboration,
- Bishai, M.
- Fast, J.
- Gerndt, E.
- Hinson, J.W.
- McIlwain, R.L.
- Miao, T.
- Miller, D.H.
- Modesitt, M.
- Payne, D.
- Shibata, E.I.
- Shipsey, I.P.J.
- Wang, P.N.
- Battle, M.
- Ernst, J.
- Gibbons, L.
- Kwon, Y.
- Roberts, S.
- Thorndike, E.H.
- Wang, C.H.
- Dominick, J.
- Lambrecht, M.
- Sanghera, S.
- Shelkov, V.
- Skwarnicki, T.
- Stroynowski, R.
- Volobouev, I.
- Wei, G.
- Artuso, M.
- Gao, M.
- Goldberg, M.
- He, D.
- Horwitz, N.
- Moneti, G.C.
- Mountain, R.
- Muheim, F.
- Mukhin, Y.
- Playfer, S.
- Rozen, Y.
- Stone, D.
- Xing, X.
- Zhu, G.
- Bartelt, J.
- Csorna, S.E.
- Egyed, Z.
- Jain, V.
- Gibaut, D.
- Kinoshita, K.
- Pomianowski, P.
- Barish, B.
- Chadha, M.
- Chan, S.
- Cowen, D.F.
- Eigen, G.
- Miller, J.S.
- O'Grady, C.O.
- Urheim, J.
- Weinstein, A.J.
- Athanas, M.
- Brower, W.
- Masek, G.
- Paar, H.G.
- Gronberg, J.
- Korte, C.M.
- Kutschke, R.
- Menary, S.
- Morrison, R.J.
- Nakanishi, S.
- Nelson, H.N.
- Nelson, T.K.
- Qiao, C.
- Richman, J.D.
- Ryd, A.
- Sperka, D.
- Tajima, H.
- Witherell, M.S.
- Procario, M.
- Balest, R.
- Cho, K.
- Ford, W.T.
- Johnson, D.R.
- Lingel, K.
- Lohner, M.
- Rankin, P.
- Smith, J.G.
- Alexander, J.P.
- Bebek, C.
- Berkelman, K.
- Bloom, K.
- Browder, T.E.
- Cassel, D.G.
- Cho, H.A.
- Coffman, D.M.
- Crowcroft, D.S.
- Drell, P.S.
- Dumas, D.J.
- Ehrlich, R.
- Gaidarev, P.
- Garcia-Sciveres, M.
- Geiser, B.
- Gittleman, B.
- Gray, S.W.
- Hartill, D.L.
- Heltsley, B.K.
- Henderson, S.
- Jones, C.D.
- Jones, S.L.
- Kandaswamy, J.
- Katayama, N.
- Kim, P.C.
- Kreinick, D.L.
- Ludwig, G.S.
- Masui, J.
- Mevissen, J.
- Mistry, N.B.
- Ng, C.R.
- Nordberg, E.
- Patterson, J.R.
- Peterson, D.
- Riley, D.
- Salman, S.
- Sapper, M.
- Wurthwein, F.
- Avery, P.
- Freyberger, A.
- Rodriguez, J.
- Yang, S.
- Yelton, J.
- Cinabro, D.
- Liu, T.
- Saulnier, M.
- Wilson, R.
- Yamamoto, H.
- Bergfeld, T.
- Eisenstein, B.I.
- Gollin, G.
- Ong, B.
- Palmer, M.
- Selen, M.
- Thaler, J.J.
- Edwards, K.W.
- Ogg, M.
- Bellerive, A.
- Britton, D.I.
- Hyatt, E.R.F.
- MacFarlane, D.B.
- Patel, P.M.
- Spaan, B.
- Sadoff, A.J.
- Ammar, R.
- Baringer, P.
- Bean, A.
- Besson, D.
- Coppage, D.
- Copty, N.
- Davis, R.
- Hancock, N.
- Kelly, M.
- Kotov, S.
- Kravchenko, I.
- Kwak, N.
- Lam, H.
- Kubota, Y.
- Lattery, M.
- Momayezi, M.
- Nelson, J.K.
- Patton, S.
- Poling, R.
- Savinov, V.
- Schrenk, S.
- Wang, R.
- Alam, M.S.
- Kim, I.J.
- Ling, Z.
- Mahmood, A.H.
- O'Neill, J.J.
- Severini, H.
- Sun, C.R.
- Wappler, F.
- Crawford, G.
- Daubenmier, C.M.
- Fulton, R.
- Fujino, D.
- Gan, K.K.
- Honscheid, K.
- Kagan, H.
- Kass, R.
- Lee, J.
- Sung, M.
- White, C.
- Wolf, A.
- Zoeller, M.M.
- Butler, F.
- Fu, X.
- Nemati, B.
- Ross, W.R.
- Skubic, P.
- Wood, M.
DOIAbstract
We have measured the weak decay asymmetry parameters (αΛc) for two Λc+ decay modes. Our measurements are αΛc = −0.94−0.06−0.06+0.21+0.12 for the decay mode Λc+ → Λπ+ and αΛc = −0.45 ±0.31 ±0.06 for the decay mode Λc → Σ+ π0. By combining these measurements with the previously measured decay rates, we have extracted the parity-violating and parity-conserving amplitudes. These amplitudes are used to test models of nonleptonic charmed baryon decay
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