Measurement of the form factor ratios in the decay [formula omitted]

• Published in: Physics letters. B Vol. 274; no. 2; pp. 246 - 252
• Main Authors: Kodama, K., Ushida, N., Mokhtarani, A., Paolone, V.S., Volk, J.T., Wilcox, J.O., Yager, P.M., Edelstein, R.M., Freyberger, A.P., Gibaut, D.B., Lipton, R.J., Nichols, W.R., Potter, D.M., Russ, J.S., Zhang, C., Zhang, Y., Jang, H.I., Kim, J.Y., Kim, T.I., Lim, I.T., Pac, M.Y., Baller, B.R., Stefanski, R.J., Nakazawa, K., Chung, K.S., Chung, S.H., Kim, D.C., Park, I.G., Park, M.S., Song, J.S., Yoon, C.S., Chikawa, M., Abe, T., Aoki, S., Fujii, T., Fujioka, G., Fujiwara, K., Fukushima, H., Hara, T., Taruma, K., Tsuzuki, Y., Yokoyama, C., Chang, S.D., Cheon, B.G., Cho, J.H., Kang, J.S., Kim, C.O., Kim, K.Y., Kim, T.Y., Lee, J.C., Lee, S.B., Nam, S.W., Shin, T.S., Sim, K.S., Woo, J.K., Isokane, Y., Tsuneoka, Y., Gauthier, A., Hoshino, K., Kitamura, H., Kobayashi, M., Miyanishi, M., Nakanishi, S., Niu, K., Niwa, K., Tajima, H., Dunlea, J.M., Frederiksen, S.G., Kuramata, S., Lundberg, B.G., Oleynik, G.A., Reay, N.W., Reibel, K., Sidwell, R.A., Stanton, N.R., Moriyama, K., Shibata, H., Kalbfleisch, G.R., Skubic, P., Snow, J.M., Willis, S.E., Yuan, W.Y., Kusumoto, O., Nakamura, K., Okusawa, T., Teranaka, M., Tominaga, T., Yoshida, T., Yuuki, J., Okabe, H., Yokota, J., Adachi, M., Kazuno, M., Niu, E., Watanabe, S., Ohtsuka, I., Sato, Y., Tezuka, I., Bahk, S.Y., Kim, S.K.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1992
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(92)90530-H

A measurement of the form factor ratios in the decay D + → K ∗(892) 0μ +ν is obtained by fitting to the decay angles and q 2 of 305 events. The results, evaluated at q 2 = 0, are A 2(0)/ A 1(0) = 0.82 +0.22 −0.23 (stat.)±0.11 (sys.) and V(0)/ A 1(0) = 2.00 +0.34 −0.32±0.16, where A 1 and A 2 are the axial vector form factors and V is the vector form factor. The corresponding ratio of the longitudinal to transverse polarization of the K ∗0 is 1.18±0.18±0.08. These results are compared with other experimental results and with theoretical predictions.