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Hinson JW, Huang GS, Lee J, et al. Improved measurement of the form factors in the decay lambda+c-->lambda + nue. Phys Rev Lett. 2005;94(19):191801doi: 10.1103/PhysRevLett.94.191801.
Hinson, J. W., Huang, G. S., Lee, J., Miller, D. H., Pavlunin, V., Rangarajan, R., Sanghi, B., Shibata, E. I., Shipsey, I. P., Cronin-Hennessy, D., Park, C. S., Park, W., Thayer, J. B., Thorndike, E. H., Coan, T. E., Gao, Y. S., Liu, F., Stroynowski, R., Artuso, M., Boulahouache, C., Blusk, S., Dambasuren, E., Dorjkhaidav, O., Mountain, R., Muramatsu, H., Nandakumar, R., Skwarnicki, T., Stone, S., Wang, J. C., Csorna, S. E., Danko, I., Bonvicini, G., Cinabro, D., Dubrovin, M., McGee, S., Bornheim, A., Lipeles, E., Pappas, S. P., Shapiro, A., Sun, W. M., Weinstein, A. J., Briere, R. A., Chen, G. P., Ferguson, T., Tatishvili, G., Vogel, H., Watkins, M. E., Adam, N. E., Alexander, J. P., Berkelman, K., Boisvert, V., Cassel, D. G., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., Galik, R. S., Gibbons, L., Gittelman, B., Gray, S. W., Hartill, D. L., Heltsley, B. K., Hsu, L., Jones, C. D., Kandaswamy, J., Kreinick, D. L., Magerkurth, A., Mahlke-Krüger, H., Meyer, T. O., Mistry, N. B., Patterson, J. R., Peterson, D., Pivarski, J., Richichi, S. J., Riley, D., Sadoff, A. J., Schwarthoff, H., Shepherd, M. R., Thayer, J. G., Urner, D., Wilksen, T., Warburton, A., Weinberger, M., Athar, S. B., Avery, P., Breva-Newell, L., Potlia, V., Stoeck, H., Yelton, J., Benslama, K., Cawlfield, C., Eisenstein, B. I., Gollin, G. D., Karliner, I., Lowrey, N., Plager, C., Sedlack, C., Selen, M., Thaler, J. J., Williams, J., Edwards, K. W., Besson, D., Anderson, S., Frolov, V. V., Gong, D. T., Kubota, Y., Li, S. Z., Poling, R., Smith, A., Stepaniak, C. J., Urheim, J., Metreveli, Z., Seth, K. K., Tomaradze, A., Zweber, P., Ahmed, S., Alam, M. S., Ernst, J., Jian, L., Saleem, M., Wappler, F., Arms, K., Eckhart, E., Gan, K. K., Gwon, C., Honscheid, K., Kagan, H., Kass, R., Pedlar, T. K., von Toerne, E., Severini, H., Skubic, P., Dytman, S. A., Mueller, J. A., Nam, S., Savinov, V. (2005). Improved measurement of the form factors in the decay lambda+c-->lambda + nue. Physical review letters, 94(19), 191801. https://doi.org/10.1103/PhysRevLett.94.191801
Hinson, J W, et al. "Improved measurement of the form factors in the decay lambda+c-->lambda + nue." Physical review letters vol. 94,19 (2005): 191801. doi: https://doi.org/10.1103/PhysRevLett.94.191801
Hinson JW, Huang GS, Lee J, Miller DH, Pavlunin V, Rangarajan R, Sanghi B, Shibata EI, Shipsey IP, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Dambasuren E, Dorjkhaidav O, Mountain R, Muramatsu H, Nandakumar R, Skwarnicki T, Stone S, Wang JC, Csorna SE, Danko I, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, Duboscq JE, Ecklund KM, Ehrlich R, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Patterson JR, Peterson D, Pivarski J, Richichi SJ, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Wilksen T, Warburton A, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Benslama K, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Lowrey N, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Besson D, Anderson S, Frolov VV, Gong DT, Kubota Y, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ahmed S, Alam MS, Ernst J, Jian L, Saleem M, Wappler F, Arms K, Eckhart E, Gan KK, Gwon C, Honscheid K, Kagan H, Kass R, Pedlar TK, von Toerne E, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V. Improved measurement of the form factors in the decay lambda+c-->lambda + nue. Phys Rev Lett. 2005 May 20;94(19):191801. doi: 10.1103/PhysRevLett.94.191801. Epub 2005 May 17. PMID: 16090160.
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Phys Rev Lett. 2005 May 20;94(19):191801. doi: 10.1103/PhysRevLett.94.191801. Epub 2005 May 17.

Improved measurement of the form factors in the decay lambda+c-->lambda + nue.

Physical review letters

J W Hinson, G S Huang, J Lee, D H Miller, V Pavlunin, R Rangarajan, B Sanghi, E I Shibata, I P J Shipsey, D Cronin-Hennessy, C S Park, W Park, J B Thayer, E H Thorndike, T E Coan, Y S Gao, F Liu, R Stroynowski, M Artuso, C Boulahouache, S Blusk, E Dambasuren, O Dorjkhaidav, R Mountain, H Muramatsu, R Nandakumar, T Skwarnicki, S Stone, J C Wang, S E Csorna, I Danko, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, S P Pappas, A Shapiro, W M Sun, A J Weinstein, R A Briere, G P Chen, T Ferguson, G Tatishvili, H Vogel, M E Watkins, N E Adam, J P Alexander, K Berkelman, V Boisvert, D G Cassel, J E Duboscq, K M Ecklund, R Ehrlich, R S Galik, L Gibbons, B Gittelman, S W Gray, D L Hartill, B K Heltsley, L Hsu, C D Jones, J Kandaswamy, D L Kreinick, A Magerkurth, H Mahlke-Krüger, T O Meyer, N B Mistry, J R Patterson, D Peterson, J Pivarski, S J Richichi, D Riley, A J Sadoff, H Schwarthoff, M R Shepherd, J G Thayer, D Urner, T Wilksen, A Warburton, M Weinberger, S B Athar, P Avery, L Breva-Newell, V Potlia, H Stoeck, J Yelton, K Benslama, C Cawlfield, B I Eisenstein, G D Gollin, I Karliner, N Lowrey, C Plager, C Sedlack, M Selen, J J Thaler, J Williams, K W Edwards, D Besson, S Anderson, V V Frolov, D T Gong, Y Kubota, S Z Li, R Poling, A Smith, C J Stepaniak, J Urheim, Z Metreveli, K K Seth, A Tomaradze, P Zweber, S Ahmed, M S Alam, J Ernst, L Jian, M Saleem, F Wappler, K Arms, E Eckhart, K K Gan, C Gwon, K Honscheid, H Kagan, R Kass, T K Pedlar, E von Toerne, H Severini, P Skubic, S A Dytman, J A Mueller, S Nam, V Savinov,

Affiliations

  1. Purdue University, West Lafayette, Indiana 47907, USA.

PMID: 16090160 DOI: 10.1103/PhysRevLett.94.191801

Abstract

Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay lambda(+)(c)lambda--> e(+)nu(e). By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R= f(2)/f(1) = -0.31 +/- 0.05(stat) +/- 0.04(syst), the pole mass, M(pole) = [2.21 +/- 0.08(stat) +/- 0.14(syst)] GeV/c(2), and the decay asymmetry parameter of the lambda(+)(c), alpha (lambda(c)) = -0.86 +/-0.03(stat) +/- 0.02(syst), for q(2) = 0.67 (GeV/c(2))(2). We compare the angular distributions of the lambda(+)(c) and lambda(-)(c) and find no evidence for CP violation: A(lambda(c)) = (alpha(lambda(c)) + alpha (lambda(c)))/(alpha(lambda(c))-alpha(lambda(c))) = 0.00 +/- 0.03(stat) +/- 0.01(syst) +/- 0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, A(lambda), for ppi(-).

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