Measurement of the D→ππ branching fractions

M. Selen, A. J. Sadoff, R. Ammar, S. Ball, P. Baringer, D. Coppage, N. Copty, R. Davis, N. Hancock, M. Kelly, N. Kwak, H. Lam, Y. Kubota, M. Lattery, J. K. Nelson, S. Patton, D. Perticone, R. Poling, V. Savinov, S. SchrenkR. Wang, M. S. Alam, I. J. Kim, B. Nemati, J. J. O'Neill, H. Severini, C. R. Sun, M. M. Zoeller, G. Crawford, C. M. Daubenmeir, R. Fulton, D. Fujino, K. K. Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, R. Malchow, F. Morrow, Y. Skovpen, M. Sung, C. White, J. Whitmore, P. Wilson, F. Butler, X. Fu, G. Kalbfleisch, M. Lambrecht, W. R. Ross, P. Skubic, J. Snow, P. L. Wang, M. Wood, D. Bortoletto, D. N. Brown, J. Fast, R. L. McIlwain, T. Miao, D. H. Miller, M. Modesitt, S. F. Schaffner, E. I. Shibata, I. P J Shipsey, P. N. Wang, M. Battle, J. Ernst, H. Kroha, S. Roberts, K. Sparks, E. H. Thorndike, C. H. Wang, J. Dominick, S. Sanghera, Tomasz Skwarnicki, R. Stroynowski, Marina Artuso, D. He, M. Goldberg, N. Horwitz, R. Kennett, G. C. Moneti, F. Muheim, Y. Mukhin, S. Playfer, Y. Rozen, Sheldon Stone, M. Thulasidas, G. Vasseur, G. Zhu, J. Bartelt, S. E. Csorna, Z. Egyed, V. Jain, P. Sheldon, D. S. Akerib, B. Barish, M. Chadha, S. Chan, D. F. Cowen, G. Eigen, J. S. Miller, C. O'Grady, J. Urheim, A. J. Weinstein, D. Acosta, M. Athanas, G. Masek, B. Ong, H. Paar, M. Sivertz, A. Bean, J. Gronberg, R. Kutschke, S. Menary, R. J. Morrison, S. Nakanishi, H. N. Nelson, T. K. Nelson, J. D. Richman, A. Ryd, H. Tajima, D. Schmidt, D. Sperka, M. S. Witherell, M. Procario, S. Yang, R. Balest, K. Cho, M. Daoudi, W. T. Ford, D. R. Johnson, K. Lingel, M. Lohner, P. Rankin, J. G. Smith, J. P. Alexander, C. Bebek, K. Berkelman, D. Besson, T. E. Browder, D. G. Cassel, H. A. Cho, D. M. Coffman, P. S. Drell, R. Ehrlich, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, C. D. Jones, S. L. Jones, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, C. R. Ng, E. Nordberg, M. Ogg, J. R. Patterson, D. Peterson, D. Riley, S. Salman, M. Sapper, H. Worden, F. Würthwein, P. Avery, A. Freyberger, J. Rodriguez, R. Stephens, J. Yelton, D. Cinabro, S. Henderson, K. Kinoshita, T. Liu, M. Saulnier, F. Shen, R. Wilson, H. Yamamoto

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for D0→π+π-, and we present the first measurements of D0→π0π0 and of D+→π+π0, which is due to an isospin changing ΔI=3/2 transition. From these data we extract the ratio of isospin amplitudes A2/A0, and the cosine of the relative phase δ=δ2-δ0 between these amplitudes, for D→ππ decays. Unlike the situation in kaon decay where A2 is strongly suppressed, we find A2/A0=0.72±0.13±0.11 and cosδ=0.14±0.13±0.09.

Original languageEnglish (US)
Pages (from-to)1973-1977
Number of pages5
JournalPhysical Review Letters
Volume71
Issue number13
DOIs
StatePublished - 1993

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decay
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Selen, M., Sadoff, A. J., Ammar, R., Ball, S., Baringer, P., Coppage, D., ... Yamamoto, H. (1993). Measurement of the D→ππ branching fractions. Physical Review Letters, 71(13), 1973-1977. https://doi.org/10.1103/PhysRevLett.71.1973

Measurement of the D→ππ branching fractions. / Selen, M.; Sadoff, A. J.; Ammar, R.; Ball, S.; Baringer, P.; Coppage, D.; Copty, N.; Davis, R.; Hancock, N.; Kelly, M.; Kwak, N.; Lam, H.; Kubota, Y.; Lattery, M.; Nelson, J. K.; Patton, S.; Perticone, D.; Poling, R.; Savinov, V.; Schrenk, S.; Wang, R.; Alam, M. S.; Kim, I. J.; Nemati, B.; O'Neill, J. J.; Severini, H.; Sun, C. R.; Zoeller, M. M.; Crawford, G.; Daubenmeir, C. M.; Fulton, R.; Fujino, D.; Gan, K. K.; Honscheid, K.; Kagan, H.; Kass, R.; Lee, J.; Malchow, R.; Morrow, F.; Skovpen, Y.; Sung, M.; White, C.; Whitmore, J.; Wilson, P.; Butler, F.; Fu, X.; Kalbfleisch, G.; Lambrecht, M.; Ross, W. R.; Skubic, P.; Snow, J.; Wang, P. L.; Wood, M.; Bortoletto, D.; Brown, D. N.; Fast, J.; McIlwain, R. L.; Miao, T.; Miller, D. H.; Modesitt, M.; Schaffner, S. F.; Shibata, E. I.; Shipsey, I. P J; Wang, P. N.; Battle, M.; Ernst, J.; Kroha, H.; Roberts, S.; Sparks, K.; Thorndike, E. H.; Wang, C. H.; Dominick, J.; Sanghera, S.; Skwarnicki, Tomasz; Stroynowski, R.; Artuso, Marina; He, D.; Goldberg, M.; Horwitz, N.; Kennett, R.; Moneti, G. C.; Muheim, F.; Mukhin, Y.; Playfer, S.; Rozen, Y.; Stone, Sheldon; Thulasidas, M.; Vasseur, G.; Zhu, G.; Bartelt, J.; Csorna, S. E.; Egyed, Z.; Jain, V.; Sheldon, P.; Akerib, D. S.; Barish, B.; Chadha, M.; Chan, S.; Cowen, D. F.; Eigen, G.; Miller, J. S.; O'Grady, C.; Urheim, J.; Weinstein, A. J.; Acosta, D.; Athanas, M.; Masek, G.; Ong, B.; Paar, H.; Sivertz, M.; Bean, A.; Gronberg, J.; Kutschke, R.; Menary, S.; Morrison, R. J.; Nakanishi, S.; Nelson, H. N.; Nelson, T. K.; Richman, J. D.; Ryd, A.; Tajima, H.; Schmidt, D.; Sperka, D.; Witherell, M. S.; Procario, M.; Yang, S.; Balest, R.; Cho, K.; Daoudi, M.; Ford, W. T.; Johnson, D. R.; Lingel, K.; Lohner, M.; Rankin, P.; Smith, J. G.; Alexander, J. P.; Bebek, C.; Berkelman, K.; Besson, D.; Browder, T. E.; Cassel, D. G.; Cho, H. A.; Coffman, D. M.; Drell, P. S.; Ehrlich, R.; Garcia-Sciveres, M.; Geiser, B.; Gittelman, B.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; 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.; Ogg, M.; Patterson, J. R.; Peterson, D.; Riley, D.; Salman, S.; Sapper, M.; Worden, H.; Würthwein, F.; Avery, P.; Freyberger, A.; Rodriguez, J.; Stephens, R.; Yelton, J.; Cinabro, D.; Henderson, S.; Kinoshita, K.; Liu, T.; Saulnier, M.; Shen, F.; Wilson, R.; Yamamoto, H.

In: Physical Review Letters, Vol. 71, No. 13, 1993, p. 1973-1977.

Research output: Contribution to journalArticle

Selen, M, Sadoff, AJ, Ammar, R, Ball, S, Baringer, P, Coppage, D, Copty, N, Davis, R, Hancock, N, Kelly, M, Kwak, N, Lam, H, Kubota, Y, Lattery, M, Nelson, JK, Patton, S, Perticone, D, Poling, R, Savinov, V, Schrenk, S, Wang, R, Alam, MS, Kim, IJ, Nemati, B, O'Neill, JJ, Severini, H, Sun, CR, Zoeller, MM, Crawford, G, Daubenmeir, CM, Fulton, R, Fujino, D, Gan, KK, Honscheid, K, Kagan, H, Kass, R, Lee, J, Malchow, R, Morrow, F, Skovpen, Y, Sung, M, White, C, Whitmore, J, Wilson, P, Butler, F, Fu, X, Kalbfleisch, G, Lambrecht, M, Ross, WR, Skubic, P, Snow, J, Wang, PL, Wood, M, Bortoletto, D, Brown, DN, Fast, J, McIlwain, RL, Miao, T, Miller, DH, Modesitt, M, Schaffner, SF, Shibata, EI, Shipsey, IPJ, Wang, PN, Battle, M, Ernst, J, Kroha, H, Roberts, S, Sparks, K, Thorndike, EH, Wang, CH, Dominick, J, Sanghera, S, Skwarnicki, T, Stroynowski, R, Artuso, M, He, D, Goldberg, M, Horwitz, N, Kennett, R, Moneti, GC, Muheim, F, Mukhin, Y, Playfer, S, Rozen, Y, Stone, S, Thulasidas, M, Vasseur, G, Zhu, G, Bartelt, J, Csorna, SE, Egyed, Z, Jain, V, Sheldon, P, Akerib, DS, Barish, B, Chadha, M, Chan, S, Cowen, DF, Eigen, G, Miller, JS, O'Grady, C, Urheim, J, Weinstein, AJ, Acosta, D, Athanas, M, Masek, G, Ong, B, Paar, H, Sivertz, M, Bean, A, Gronberg, J, Kutschke, R, Menary, S, Morrison, RJ, Nakanishi, S, Nelson, HN, Nelson, TK, Richman, JD, Ryd, A, Tajima, H, Schmidt, D, Sperka, D, Witherell, MS, Procario, M, Yang, S, Balest, R, Cho, K, Daoudi, M, Ford, WT, Johnson, DR, Lingel, K, Lohner, M, Rankin, P, Smith, JG, Alexander, JP, Bebek, C, Berkelman, K, Besson, D, Browder, TE, Cassel, DG, Cho, HA, Coffman, DM, Drell, PS, Ehrlich, R, Garcia-Sciveres, M, Geiser, B, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Jones, CD, Jones, SL, Kandaswamy, J, Katayama, N, Kim, PC, Kreinick, DL, Ludwig, GS, Masui, J, Mevissen, J, Mistry, NB, Ng, CR, Nordberg, E, Ogg, M, Patterson, JR, Peterson, D, Riley, D, Salman, S, Sapper, M, Worden, H, Würthwein, F, Avery, P, Freyberger, A, Rodriguez, J, Stephens, R, Yelton, J, Cinabro, D, Henderson, S, Kinoshita, K, Liu, T, Saulnier, M, Shen, F, Wilson, R & Yamamoto, H 1993, 'Measurement of the D→ππ branching fractions', Physical Review Letters, vol. 71, no. 13, pp. 1973-1977. https://doi.org/10.1103/PhysRevLett.71.1973
Selen M, Sadoff AJ, Ammar R, Ball S, Baringer P, Coppage D et al. Measurement of the D→ππ branching fractions. Physical Review Letters. 1993;71(13):1973-1977. https://doi.org/10.1103/PhysRevLett.71.1973
Selen, M. ; Sadoff, A. J. ; Ammar, R. ; Ball, S. ; Baringer, P. ; Coppage, D. ; Copty, N. ; Davis, R. ; Hancock, N. ; Kelly, M. ; Kwak, N. ; Lam, H. ; Kubota, Y. ; Lattery, M. ; Nelson, J. K. ; Patton, S. ; Perticone, D. ; Poling, R. ; Savinov, V. ; Schrenk, S. ; Wang, R. ; Alam, M. S. ; Kim, I. J. ; Nemati, B. ; O'Neill, J. J. ; Severini, H. ; Sun, C. R. ; Zoeller, M. M. ; Crawford, G. ; Daubenmeir, C. M. ; Fulton, R. ; Fujino, D. ; Gan, K. K. ; Honscheid, K. ; Kagan, H. ; Kass, R. ; Lee, J. ; Malchow, R. ; Morrow, F. ; Skovpen, Y. ; Sung, M. ; White, C. ; Whitmore, J. ; Wilson, P. ; Butler, F. ; Fu, X. ; Kalbfleisch, G. ; Lambrecht, M. ; Ross, W. R. ; Skubic, P. ; Snow, J. ; Wang, P. L. ; Wood, M. ; Bortoletto, D. ; Brown, D. N. ; Fast, J. ; McIlwain, R. L. ; Miao, T. ; Miller, D. H. ; Modesitt, M. ; Schaffner, S. F. ; Shibata, E. I. ; Shipsey, I. P J ; Wang, P. N. ; Battle, M. ; Ernst, J. ; Kroha, H. ; Roberts, S. ; Sparks, K. ; Thorndike, E. H. ; Wang, C. H. ; Dominick, J. ; Sanghera, S. ; Skwarnicki, Tomasz ; Stroynowski, R. ; Artuso, Marina ; He, D. ; Goldberg, M. ; Horwitz, N. ; Kennett, R. ; Moneti, G. C. ; Muheim, F. ; Mukhin, Y. ; Playfer, S. ; Rozen, Y. ; Stone, Sheldon ; Thulasidas, M. ; Vasseur, G. ; Zhu, G. ; Bartelt, J. ; Csorna, S. E. ; Egyed, Z. ; Jain, V. ; Sheldon, P. ; Akerib, D. S. ; Barish, B. ; Chadha, M. ; Chan, S. ; Cowen, D. F. ; Eigen, G. ; Miller, J. S. ; O'Grady, C. ; Urheim, J. ; Weinstein, A. J. ; Acosta, D. ; Athanas, M. ; Masek, G. ; Ong, B. ; Paar, H. ; Sivertz, M. ; Bean, A. ; Gronberg, J. ; Kutschke, R. ; Menary, S. ; Morrison, R. J. ; Nakanishi, S. ; Nelson, H. N. ; Nelson, T. K. ; Richman, J. D. ; Ryd, A. ; Tajima, H. ; Schmidt, D. ; Sperka, D. ; Witherell, M. S. ; Procario, M. ; Yang, S. ; Balest, R. ; Cho, K. ; Daoudi, M. ; Ford, W. T. ; Johnson, D. R. ; Lingel, K. ; Lohner, M. ; Rankin, P. ; Smith, J. G. ; Alexander, J. P. ; Bebek, C. ; Berkelman, K. ; Besson, D. ; Browder, T. E. ; Cassel, D. G. ; Cho, H. A. ; Coffman, D. M. ; Drell, P. S. ; Ehrlich, R. ; Garcia-Sciveres, M. ; Geiser, B. ; Gittelman, B. ; Gray, S. W. ; Hartill, D. L. ; Heltsley, B. K. ; 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. ; Ogg, M. ; Patterson, J. R. ; Peterson, D. ; Riley, D. ; Salman, S. ; Sapper, M. ; Worden, H. ; Würthwein, F. ; Avery, P. ; Freyberger, A. ; Rodriguez, J. ; Stephens, R. ; Yelton, J. ; Cinabro, D. ; Henderson, S. ; Kinoshita, K. ; Liu, T. ; Saulnier, M. ; Shen, F. ; Wilson, R. ; Yamamoto, H. / Measurement of the D→ππ branching fractions. In: Physical Review Letters. 1993 ; Vol. 71, No. 13. pp. 1973-1977.
@article{e2e54667ca094b61aa511270ac69e32c,
title = "Measurement of the D→ππ branching fractions",
abstract = "Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for D0→π+π-, and we present the first measurements of D0→π0π0 and of D+→π+π0, which is due to an isospin changing ΔI=3/2 transition. From these data we extract the ratio of isospin amplitudes A2/A0, and the cosine of the relative phase δ=δ2-δ0 between these amplitudes, for D→ππ decays. Unlike the situation in kaon decay where A2 is strongly suppressed, we find A2/A0=0.72±0.13±0.11 and cosδ=0.14±0.13±0.09.",
author = "M. Selen and Sadoff, {A. J.} and R. Ammar and S. Ball and P. Baringer and D. Coppage and N. Copty and R. Davis and N. Hancock and M. Kelly and N. Kwak and H. Lam and Y. Kubota and M. Lattery and Nelson, {J. K.} and S. Patton and D. Perticone and R. Poling and V. Savinov and S. Schrenk and R. Wang and Alam, {M. S.} and Kim, {I. J.} and B. Nemati and O'Neill, {J. J.} and H. Severini and Sun, {C. R.} and Zoeller, {M. M.} and G. Crawford and Daubenmeir, {C. M.} and R. Fulton and D. Fujino and Gan, {K. K.} and K. Honscheid and H. Kagan and R. Kass and J. Lee and R. Malchow and F. Morrow and Y. Skovpen and M. Sung and C. White and J. Whitmore and P. Wilson and F. Butler and X. Fu and G. Kalbfleisch and M. Lambrecht and Ross, {W. R.} and P. Skubic and J. Snow and Wang, {P. L.} and M. Wood and D. Bortoletto and Brown, {D. N.} and J. Fast and McIlwain, {R. L.} and T. Miao and Miller, {D. H.} and M. Modesitt and Schaffner, {S. F.} and Shibata, {E. I.} and Shipsey, {I. P J} and Wang, {P. N.} and M. Battle and J. Ernst and H. Kroha and S. Roberts and K. Sparks and Thorndike, {E. H.} and Wang, {C. H.} and J. Dominick and S. Sanghera and Tomasz Skwarnicki and R. Stroynowski and Marina Artuso and D. He and M. Goldberg and N. Horwitz and R. Kennett and Moneti, {G. C.} and F. Muheim and Y. Mukhin and S. Playfer and Y. Rozen and Sheldon Stone and M. Thulasidas and G. Vasseur and G. Zhu and J. Bartelt and Csorna, {S. E.} and Z. Egyed and V. Jain and P. Sheldon and Akerib, {D. S.} and B. Barish and M. Chadha and S. Chan and Cowen, {D. F.} and G. Eigen and Miller, {J. S.} and C. O'Grady and J. Urheim and Weinstein, {A. J.} and D. Acosta and M. Athanas and G. Masek and B. Ong and H. Paar and M. Sivertz and A. Bean and J. Gronberg and R. Kutschke and S. Menary and Morrison, {R. J.} and S. Nakanishi and Nelson, {H. N.} and Nelson, {T. K.} and Richman, {J. D.} and A. Ryd and H. Tajima and D. Schmidt and D. Sperka and Witherell, {M. S.} and M. Procario and S. Yang and R. Balest and K. Cho and M. Daoudi and Ford, {W. T.} and Johnson, {D. R.} and K. Lingel and M. Lohner and P. Rankin and Smith, {J. G.} and Alexander, {J. P.} and C. Bebek and K. Berkelman and D. Besson and Browder, {T. E.} and Cassel, {D. G.} and Cho, {H. A.} and Coffman, {D. M.} and Drell, {P. S.} and R. Ehrlich and M. Garcia-Sciveres and B. Geiser and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Jones, {C. D.} and Jones, {S. L.} and J. Kandaswamy and N. Katayama and Kim, {P. C.} and Kreinick, {D. L.} and Ludwig, {G. S.} and J. Masui and J. Mevissen and Mistry, {N. B.} and Ng, {C. R.} and E. Nordberg and M. Ogg and Patterson, {J. R.} and D. Peterson and D. Riley and S. Salman and M. Sapper and H. Worden and F. W{\"u}rthwein and P. Avery and A. Freyberger and J. Rodriguez and R. Stephens and J. Yelton and D. Cinabro and S. Henderson and K. Kinoshita and T. Liu and M. Saulnier and F. Shen and R. Wilson and H. Yamamoto",
year = "1993",
doi = "10.1103/PhysRevLett.71.1973",
language = "English (US)",
volume = "71",
pages = "1973--1977",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "13",

}

TY - JOUR

T1 - Measurement of the D→ππ branching fractions

AU - Selen, M.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Ball, S.

AU - Baringer, P.

AU - Coppage, D.

AU - Copty, N.

AU - Davis, R.

AU - Hancock, N.

AU - Kelly, M.

AU - Kwak, N.

AU - Lam, H.

AU - Kubota, Y.

AU - Lattery, M.

AU - Nelson, J. K.

AU - Patton, S.

AU - Perticone, D.

AU - Poling, R.

AU - Savinov, V.

AU - Schrenk, S.

AU - Wang, R.

AU - Alam, M. S.

AU - Kim, I. J.

AU - Nemati, B.

AU - O'Neill, J. J.

AU - Severini, H.

AU - Sun, C. R.

AU - Zoeller, M. M.

AU - Crawford, G.

AU - Daubenmeir, C. M.

AU - Fulton, R.

AU - Fujino, D.

AU - Gan, K. K.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Malchow, R.

AU - Morrow, F.

AU - Skovpen, Y.

AU - Sung, M.

AU - White, C.

AU - Whitmore, J.

AU - Wilson, P.

AU - Butler, F.

AU - Fu, X.

AU - Kalbfleisch, G.

AU - Lambrecht, M.

AU - Ross, W. R.

AU - Skubic, P.

AU - Snow, J.

AU - Wang, P. L.

AU - Wood, M.

AU - Bortoletto, D.

AU - Brown, D. N.

AU - Fast, J.

AU - McIlwain, R. L.

AU - Miao, T.

AU - Miller, D. H.

AU - Modesitt, M.

AU - Schaffner, S. F.

AU - Shibata, E. I.

AU - Shipsey, I. P J

AU - Wang, P. N.

AU - Battle, M.

AU - Ernst, J.

AU - Kroha, H.

AU - Roberts, S.

AU - Sparks, K.

AU - Thorndike, E. H.

AU - Wang, C. H.

AU - Dominick, J.

AU - Sanghera, S.

AU - Skwarnicki, Tomasz

AU - Stroynowski, R.

AU - Artuso, Marina

AU - He, D.

AU - Goldberg, M.

AU - Horwitz, N.

AU - Kennett, R.

AU - Moneti, G. C.

AU - Muheim, F.

AU - Mukhin, Y.

AU - Playfer, S.

AU - Rozen, Y.

AU - Stone, Sheldon

AU - Thulasidas, M.

AU - Vasseur, G.

AU - Zhu, G.

AU - Bartelt, J.

AU - Csorna, S. E.

AU - Egyed, Z.

AU - Jain, V.

AU - Sheldon, P.

AU - Akerib, D. S.

AU - Barish, B.

AU - Chadha, M.

AU - Chan, S.

AU - Cowen, D. F.

AU - Eigen, G.

AU - Miller, J. S.

AU - O'Grady, C.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Acosta, D.

AU - Athanas, M.

AU - Masek, G.

AU - Ong, B.

AU - Paar, H.

AU - Sivertz, M.

AU - Bean, A.

AU - Gronberg, J.

AU - Kutschke, R.

AU - Menary, S.

AU - Morrison, R. J.

AU - Nakanishi, S.

AU - Nelson, H. N.

AU - Nelson, T. K.

AU - Richman, J. D.

AU - Ryd, A.

AU - Tajima, H.

AU - Schmidt, D.

AU - Sperka, D.

AU - Witherell, M. S.

AU - Procario, M.

AU - Yang, S.

AU - Balest, R.

AU - Cho, K.

AU - Daoudi, M.

AU - Ford, W. T.

AU - Johnson, D. R.

AU - Lingel, K.

AU - Lohner, M.

AU - Rankin, P.

AU - Smith, J. G.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berkelman, K.

AU - Besson, D.

AU - Browder, T. E.

AU - Cassel, D. G.

AU - Cho, H. A.

AU - Coffman, D. M.

AU - Drell, P. S.

AU - Ehrlich, R.

AU - Garcia-Sciveres, M.

AU - Geiser, B.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Jones, C. D.

AU - Jones, S. L.

AU - Kandaswamy, J.

AU - Katayama, N.

AU - Kim, P. C.

AU - Kreinick, D. L.

AU - Ludwig, G. S.

AU - Masui, J.

AU - Mevissen, J.

AU - Mistry, N. B.

AU - Ng, C. R.

AU - Nordberg, E.

AU - Ogg, M.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Salman, S.

AU - Sapper, M.

AU - Worden, H.

AU - Würthwein, F.

AU - Avery, P.

AU - Freyberger, A.

AU - Rodriguez, J.

AU - Stephens, R.

AU - Yelton, J.

AU - Cinabro, D.

AU - Henderson, S.

AU - Kinoshita, K.

AU - Liu, T.

AU - Saulnier, M.

AU - Shen, F.

AU - Wilson, R.

AU - Yamamoto, H.

PY - 1993

Y1 - 1993

N2 - Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for D0→π+π-, and we present the first measurements of D0→π0π0 and of D+→π+π0, which is due to an isospin changing ΔI=3/2 transition. From these data we extract the ratio of isospin amplitudes A2/A0, and the cosine of the relative phase δ=δ2-δ0 between these amplitudes, for D→ππ decays. Unlike the situation in kaon decay where A2 is strongly suppressed, we find A2/A0=0.72±0.13±0.11 and cosδ=0.14±0.13±0.09.

AB - Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for D0→π+π-, and we present the first measurements of D0→π0π0 and of D+→π+π0, which is due to an isospin changing ΔI=3/2 transition. From these data we extract the ratio of isospin amplitudes A2/A0, and the cosine of the relative phase δ=δ2-δ0 between these amplitudes, for D→ππ decays. Unlike the situation in kaon decay where A2 is strongly suppressed, we find A2/A0=0.72±0.13±0.11 and cosδ=0.14±0.13±0.09.

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U2 - 10.1103/PhysRevLett.71.1973

DO - 10.1103/PhysRevLett.71.1973

M3 - Article

AN - SCOPUS:4243653296

VL - 71

SP - 1973

EP - 1977

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 13

ER -