Lepton asymmetry measurements in B̄→D*l-ν̄l and implications for V-A and the form factors

S. Sanghera, Tomasz Skwarnicki, R. Stroynowski, Marina Artuso, M. Goldberg, N. Horwitz, R. Kennett, G. C. Moneti, F. Muheim, S. Playfer, Y. Rozen, P. Rubin, Sheldon Stone, M. Thulasidas, W. M. Yao, G. Zhu, A. V. Barnes, J. Bartelt, S. E. Csorna, Z. EgyedV. Jain, P. Sheldon, D. S. Akerib, B. Barish, M. Chadha, D. F. Cowen, G. Eigen, J. S. Miller, J. Urheim, A. J. Weinstein, D. Acosta, G. Masek, B. Ong, H. Paar, M. Sivertz, A. Bean, J. Gronberg, R. Kutschke, S. Menary, R. J. Morrison, H. Nelson, J. Richman, H. Tajima, D. Schmidt, D. Sperka, M. Witherell, M. Procario, 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, D. M. Coffman, P. S. Drell, R. Ehrlich, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, K. Honscheid, C. 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, C. O'Grady, J. R. Patterson, D. Peterson, D. Riley, M. Sapper, M. Selen, H. Worden, M. Worris, F. Würthwein, P. Avery, A. Freyberger, J. Rodriguez, R. Stephens, J. Yelton, D. Cinabro, S. Henderson, K. Kinoshita, T. Liu, M. Saulnier, R. Wilson, H. Yamamoto, 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. Schrenk, R. Wang, M. S. Alam, I. J. Kim, B. Nemati, J. J. O'Neill, V. Romero, H. Severini, C. R. Sun, P. N. Wang, M. M. Zoeller, G. Crawford, R. Fulton, K. K. Gan, H. Kagan, R. Kass, J. Lee, R. Malchow, F. Morrow, M. Sung, C. White, J. Whitmore, P. Wilson, F. Butler, X. Fu, G. Kalbfleisch, M. Lambrecht, P. Skubic, J. Snow, P. L. Wang, D. Bortoletto, D. N. Brown, J. Dominick, R. L. McIlwain, T. Miao, D. H. Miller, M. Modesitt, S. F. Schaffner, E. I. Shibata, I. P J Shipsey, M. Battle, J. Ernst, H. Kroha, S. Roberts, K. Sparks, E. H. Thorndike, C. H. Wang

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

We present a measurement of the lepton decay asymmetry Afb in the reaction B̄→D*l-ν̄l using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of Afb confirms that the chirality of the weak interaction is predominantly left-handed in b→c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using Afb and the previously determined branching ratio, q2 distribution, and D* polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.

Original languageEnglish (US)
Pages (from-to)791-798
Number of pages8
JournalPhysical Review D
Volume47
Issue number3
DOIs
StatePublished - 1993

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form factors
leptons
asymmetry
decay
chirality
detectors
polarization
electrons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Lepton asymmetry measurements in B̄→D*l-ν̄l and implications for V-A and the form factors. / Sanghera, S.; Skwarnicki, Tomasz; Stroynowski, R.; Artuso, Marina; Goldberg, M.; Horwitz, N.; Kennett, R.; Moneti, G. C.; Muheim, F.; Playfer, S.; Rozen, Y.; Rubin, P.; Stone, Sheldon; Thulasidas, M.; Yao, W. M.; Zhu, G.; Barnes, A. V.; Bartelt, J.; Csorna, S. E.; Egyed, Z.; Jain, V.; Sheldon, P.; Akerib, D. S.; Barish, B.; Chadha, M.; Cowen, D. F.; Eigen, G.; Miller, J. S.; Urheim, J.; Weinstein, A. J.; Acosta, D.; Masek, G.; Ong, B.; Paar, H.; Sivertz, M.; Bean, A.; Gronberg, J.; Kutschke, R.; Menary, S.; Morrison, R. J.; Nelson, H.; Richman, J.; Tajima, H.; Schmidt, D.; Sperka, D.; Witherell, M.; Procario, M.; 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.; Coffman, D. M.; Drell, P. S.; Ehrlich, R.; Galik, R. S.; Garcia-Sciveres, M.; Geiser, B.; Gittelman, B.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Honscheid, K.; Jones, C.; 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.; O'Grady, C.; Patterson, J. R.; Peterson, D.; Riley, D.; Sapper, M.; Selen, M.; Worden, H.; Worris, M.; Würthwein, F.; Avery, P.; Freyberger, A.; Rodriguez, J.; Stephens, R.; Yelton, J.; Cinabro, D.; Henderson, S.; Kinoshita, K.; Liu, T.; Saulnier, M.; Wilson, R.; Yamamoto, H.; 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.; Romero, V.; Severini, H.; Sun, C. R.; Wang, P. N.; Zoeller, M. M.; Crawford, G.; Fulton, R.; Gan, K. K.; Kagan, H.; Kass, R.; Lee, J.; Malchow, R.; Morrow, F.; Sung, M.; White, C.; Whitmore, J.; Wilson, P.; Butler, F.; Fu, X.; Kalbfleisch, G.; Lambrecht, M.; Skubic, P.; Snow, J.; Wang, P. L.; Bortoletto, D.; Brown, D. N.; Dominick, J.; McIlwain, R. L.; Miao, T.; Miller, D. H.; Modesitt, M.; Schaffner, S. F.; Shibata, E. I.; Shipsey, I. P J; Battle, M.; Ernst, J.; Kroha, H.; Roberts, S.; Sparks, K.; Thorndike, E. H.; Wang, C. H.

In: Physical Review D, Vol. 47, No. 3, 1993, p. 791-798.

Research output: Contribution to journalArticle

Sanghera, S, Skwarnicki, T, Stroynowski, R, Artuso, M, Goldberg, M, Horwitz, N, Kennett, R, Moneti, GC, Muheim, F, Playfer, S, Rozen, Y, Rubin, P, Stone, S, Thulasidas, M, Yao, WM, Zhu, G, Barnes, AV, Bartelt, J, Csorna, SE, Egyed, Z, Jain, V, Sheldon, P, Akerib, DS, Barish, B, Chadha, M, Cowen, DF, Eigen, G, Miller, JS, Urheim, J, Weinstein, AJ, Acosta, D, Masek, G, Ong, B, Paar, H, Sivertz, M, Bean, A, Gronberg, J, Kutschke, R, Menary, S, Morrison, RJ, Nelson, H, Richman, J, Tajima, H, Schmidt, D, Sperka, D, Witherell, M, Procario, M, 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, Coffman, DM, Drell, PS, Ehrlich, R, Galik, RS, Garcia-Sciveres, M, Geiser, B, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Honscheid, K, Jones, C, Kandaswamy, J, Katayama, N, Kim, PC, Kreinick, DL, Ludwig, GS, Masui, J, Mevissen, J, Mistry, NB, Ng, CR, Nordberg, E, O'Grady, C, Patterson, JR, Peterson, D, Riley, D, Sapper, M, Selen, M, Worden, H, Worris, M, Würthwein, F, Avery, P, Freyberger, A, Rodriguez, J, Stephens, R, Yelton, J, Cinabro, D, Henderson, S, Kinoshita, K, Liu, T, Saulnier, M, Wilson, R, Yamamoto, H, 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, Romero, V, Severini, H, Sun, CR, Wang, PN, Zoeller, MM, Crawford, G, Fulton, R, Gan, KK, Kagan, H, Kass, R, Lee, J, Malchow, R, Morrow, F, Sung, M, White, C, Whitmore, J, Wilson, P, Butler, F, Fu, X, Kalbfleisch, G, Lambrecht, M, Skubic, P, Snow, J, Wang, PL, Bortoletto, D, Brown, DN, Dominick, J, McIlwain, RL, Miao, T, Miller, DH, Modesitt, M, Schaffner, SF, Shibata, EI, Shipsey, IPJ, Battle, M, Ernst, J, Kroha, H, Roberts, S, Sparks, K, Thorndike, EH & Wang, CH 1993, 'Lepton asymmetry measurements in B̄→D*l-ν̄l and implications for V-A and the form factors', Physical Review D, vol. 47, no. 3, pp. 791-798. https://doi.org/10.1103/PhysRevD.47.791
Sanghera, S. ; Skwarnicki, Tomasz ; Stroynowski, R. ; Artuso, Marina ; Goldberg, M. ; Horwitz, N. ; Kennett, R. ; Moneti, G. C. ; Muheim, F. ; Playfer, S. ; Rozen, Y. ; Rubin, P. ; Stone, Sheldon ; Thulasidas, M. ; Yao, W. M. ; Zhu, G. ; Barnes, A. V. ; Bartelt, J. ; Csorna, S. E. ; Egyed, Z. ; Jain, V. ; Sheldon, P. ; Akerib, D. S. ; Barish, B. ; Chadha, M. ; Cowen, D. F. ; Eigen, G. ; Miller, J. S. ; Urheim, J. ; Weinstein, A. J. ; Acosta, D. ; Masek, G. ; Ong, B. ; Paar, H. ; Sivertz, M. ; Bean, A. ; Gronberg, J. ; Kutschke, R. ; Menary, S. ; Morrison, R. J. ; Nelson, H. ; Richman, J. ; Tajima, H. ; Schmidt, D. ; Sperka, D. ; Witherell, M. ; Procario, M. ; 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. ; Coffman, D. M. ; Drell, P. S. ; Ehrlich, R. ; Galik, R. S. ; Garcia-Sciveres, M. ; Geiser, B. ; Gittelman, B. ; Gray, S. W. ; Hartill, D. L. ; Heltsley, B. K. ; Honscheid, K. ; Jones, C. ; 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. ; O'Grady, C. ; Patterson, J. R. ; Peterson, D. ; Riley, D. ; Sapper, M. ; Selen, M. ; Worden, H. ; Worris, M. ; Würthwein, F. ; Avery, P. ; Freyberger, A. ; Rodriguez, J. ; Stephens, R. ; Yelton, J. ; Cinabro, D. ; Henderson, S. ; Kinoshita, K. ; Liu, T. ; Saulnier, M. ; Wilson, R. ; Yamamoto, H. ; 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. ; Romero, V. ; Severini, H. ; Sun, C. R. ; Wang, P. N. ; Zoeller, M. M. ; Crawford, G. ; Fulton, R. ; Gan, K. K. ; Kagan, H. ; Kass, R. ; Lee, J. ; Malchow, R. ; Morrow, F. ; Sung, M. ; White, C. ; Whitmore, J. ; Wilson, P. ; Butler, F. ; Fu, X. ; Kalbfleisch, G. ; Lambrecht, M. ; Skubic, P. ; Snow, J. ; Wang, P. L. ; Bortoletto, D. ; Brown, D. N. ; Dominick, J. ; McIlwain, R. L. ; Miao, T. ; Miller, D. H. ; Modesitt, M. ; Schaffner, S. F. ; Shibata, E. I. ; Shipsey, I. P J ; Battle, M. ; Ernst, J. ; Kroha, H. ; Roberts, S. ; Sparks, K. ; Thorndike, E. H. ; Wang, C. H. / Lepton asymmetry measurements in B̄→D*l-ν̄l and implications for V-A and the form factors. In: Physical Review D. 1993 ; Vol. 47, No. 3. pp. 791-798.
@article{d5413dfab70b4d3bbbad339424ef8021,
title = "Lepton asymmetry measurements in B̄→D*l-ν̄l and implications for V-A and the form factors",
abstract = "We present a measurement of the lepton decay asymmetry Afb in the reaction B̄→D*l-ν̄l using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of Afb confirms that the chirality of the weak interaction is predominantly left-handed in b→c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using Afb and the previously determined branching ratio, q2 distribution, and D* polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.",
author = "S. Sanghera and Tomasz Skwarnicki and R. Stroynowski and Marina Artuso and M. Goldberg and N. Horwitz and R. Kennett and Moneti, {G. C.} and F. Muheim and S. Playfer and Y. Rozen and P. Rubin and Sheldon Stone and M. Thulasidas and Yao, {W. M.} and G. Zhu and Barnes, {A. V.} 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 Cowen, {D. F.} and G. Eigen and Miller, {J. S.} and J. Urheim and Weinstein, {A. J.} and D. Acosta 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 H. Nelson and J. Richman and H. Tajima and D. Schmidt and D. Sperka and M. Witherell and M. Procario 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 Coffman, {D. M.} and Drell, {P. S.} and R. Ehrlich and Galik, {R. S.} and M. Garcia-Sciveres and B. Geiser and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and K. Honscheid and C. Jones 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 C. O'Grady and Patterson, {J. R.} and D. Peterson and D. Riley and M. Sapper and M. Selen and H. Worden and M. Worris 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 R. Wilson and H. Yamamoto 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 V. Romero and H. Severini and Sun, {C. R.} and Wang, {P. N.} and Zoeller, {M. M.} and G. Crawford and R. Fulton and Gan, {K. K.} and H. Kagan and R. Kass and J. Lee and R. Malchow and F. Morrow 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 P. Skubic and J. Snow and Wang, {P. L.} and D. Bortoletto and Brown, {D. N.} and J. Dominick 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 M. Battle and J. Ernst and H. Kroha and S. Roberts and K. Sparks and Thorndike, {E. H.} and Wang, {C. H.}",
year = "1993",
doi = "10.1103/PhysRevD.47.791",
language = "English (US)",
volume = "47",
pages = "791--798",
journal = "Physical review D: Particles and fields",
issn = "1550-7998",
publisher = "American Institute of Physics",
number = "3",

}

TY - JOUR

T1 - Lepton asymmetry measurements in B̄→D*l-ν̄l and implications for V-A and the form factors

AU - Sanghera, S.

AU - Skwarnicki, Tomasz

AU - Stroynowski, R.

AU - Artuso, Marina

AU - Goldberg, M.

AU - Horwitz, N.

AU - Kennett, R.

AU - Moneti, G. C.

AU - Muheim, F.

AU - Playfer, S.

AU - Rozen, Y.

AU - Rubin, P.

AU - Stone, Sheldon

AU - Thulasidas, M.

AU - Yao, W. M.

AU - Zhu, G.

AU - Barnes, A. V.

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 - Cowen, D. F.

AU - Eigen, G.

AU - Miller, J. S.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Acosta, D.

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 - Nelson, H.

AU - Richman, J.

AU - Tajima, H.

AU - Schmidt, D.

AU - Sperka, D.

AU - Witherell, M.

AU - Procario, M.

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 - Coffman, D. M.

AU - Drell, P. S.

AU - Ehrlich, R.

AU - Galik, R. S.

AU - Garcia-Sciveres, M.

AU - Geiser, B.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Honscheid, K.

AU - Jones, C.

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 - O'Grady, C.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Sapper, M.

AU - Selen, M.

AU - Worden, H.

AU - Worris, M.

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 - Wilson, R.

AU - Yamamoto, H.

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 - Romero, V.

AU - Severini, H.

AU - Sun, C. R.

AU - Wang, P. N.

AU - Zoeller, M. M.

AU - Crawford, G.

AU - Fulton, R.

AU - Gan, K. K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Malchow, R.

AU - Morrow, F.

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 - Skubic, P.

AU - Snow, J.

AU - Wang, P. L.

AU - Bortoletto, D.

AU - Brown, D. N.

AU - Dominick, 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 - Battle, M.

AU - Ernst, J.

AU - Kroha, H.

AU - Roberts, S.

AU - Sparks, K.

AU - Thorndike, E. H.

AU - Wang, C. H.

PY - 1993

Y1 - 1993

N2 - We present a measurement of the lepton decay asymmetry Afb in the reaction B̄→D*l-ν̄l using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of Afb confirms that the chirality of the weak interaction is predominantly left-handed in b→c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using Afb and the previously determined branching ratio, q2 distribution, and D* polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.

AB - We present a measurement of the lepton decay asymmetry Afb in the reaction B̄→D*l-ν̄l using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of Afb confirms that the chirality of the weak interaction is predominantly left-handed in b→c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using Afb and the previously determined branching ratio, q2 distribution, and D* polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.

UR - http://www.scopus.com/inward/record.url?scp=4243474388&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243474388&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.47.791

DO - 10.1103/PhysRevD.47.791

M3 - Article

AN - SCOPUS:4243474388

VL - 47

SP - 791

EP - 798

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 3

ER -