Test of exotic scalar and tensor couplings in K+ → π0e+ν decay

S. Shimizu, K. Horie, M. Abe, M. Aoki, I. Arai, Y. Asano, T. Baker, M. Blecher, M. D. Chapman, P. Depommier, M. P. Grigorjev, M. Hasinoff, H. C. Huang, Y. Igarashi, T. Ikeda, J. Imazato, A. P. Ivashkin, J. H. Kang, M. M. Khabibullin, A. N. KhotjantsevY. G. Kudenko, Y. Kuno, J. M. Lee, K. S. Lee, A. S. Levchenko, G. Y. Lim, J. A. Macdonald, C. R. Mindas, O. V. Mineev, S. Sekikawa, H. M. Shimizu, Y. H. Shin, Y. M. Shin, K. S. Sim, A. Suzuki, T. Tashiro, A. Watanabe, D. H. Wright, T. Yokoi

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Abstract

The form factors of the decay K+ → π0e+ν (K(e3)/+) have been measured with stopped kaons. A Dalitz plot containing 4.1 x 104 events was analyzed. A comparison of the observed Dalitz plot with a Monte Carlo simulation determined the ratio of the strengths of possible scalar and tensor couplings to that of the vector coupling, f(S)/f+(0) = -0.002 ± 0.026(stat) ± 0.014(syst) and f(T)/f+(0) = -0.01 ± 0.14(stat) ± 0.09(syst). These values are consistent with the standard model prediction of zero, and disagree with a previous experiment. The analysis also yielded the coefficient of the q2 term in the vector form factor to be λ+ = 0.0278 ± 0.0026(stat) ± 0.0030(syst). (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)33-41
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume495
Issue number1-2
DOIs
Publication statusPublished - 2000 Dec 7

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Shimizu, S., Horie, K., Abe, M., Aoki, M., Arai, I., Asano, Y., Baker, T., Blecher, M., Chapman, M. D., Depommier, P., Grigorjev, M. P., Hasinoff, M., Huang, H. C., Igarashi, Y., Ikeda, T., Imazato, J., Ivashkin, A. P., Kang, J. H., Khabibullin, M. M., ... Yokoi, T. (2000). Test of exotic scalar and tensor couplings in K+ → π0e+ν decay. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 495(1-2), 33-41. https://doi.org/10.1016/S0370-2693(00)01235-1