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Test of exotic scalar and tensor interactions in K e3 decay using stopped positive kaons |
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| Authors: | A. S. Levchenko A. N. Khotjantsev A. P. Ivashkin M. Abe M. A. Aliev V. V. Anisimovsky M. Aoki I. Arai Y. Asano T. Baker M. Blecher P. Depommier M. Hasinoff K. Horie H. C. Huang Y. Igarashi T. Ikeda J. Imazato M. M. Khabibullin Yu. G. Kudenko Y. Kuno L. S. Lee G. Y. Lim J. A. Macdonald D. R. Marlow C. R. Mindas O. V. Mineev C. Rangacharyulu S. Shimizu Y. -M. Shin A. Suzuki A. Watanabe N. V. Yershov T. Yokoi |
| Affiliation: | (1) University of Tsukuba, Japan;(2) KEK, Japan;(3) University of Saskatchewan, Canada;(4) Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA;(5) University of Montreal, Canada;(6) University of British Columbia, Vancouver, Canada;(7) Osaka University, Japan;(8) National Taiwan University, Taipei, Taiwan;(9) Institute of Physical and Chemical Research, Hirosawa, Japan;(10) Korea University, Seoul, Korea;(11) TRIUMF, Canada;(12) Princeton University, Princeton, NJ 08540, USA;(13) Institute for Nuclear Research, Russian Academy of Sciences, pr. Shestidesyatiletiya Oktyabrya 7a, Moscow, 117312, Russia |
| Abstract: | The form factors of the decay K + → π 0 e + ν e (K e3) have been determined from the comparison of the experimental and Monte Carlo Dalitz distributions containing about 105 K e3 events. The following values of the parameters were obtained: λ +=0.0278±0.0017 (stat.)±0.0015 (syst.), |f S/f +(0)|=0.0040±0.0160 (stat.)±0.0067 (syst.), and |f T/f +(0)|=0.019±0.080 (stat.)±0.038 (syst.). Both scalar f S and tensor f T form factors are consistent with the Standard Model predictions of zero values. |
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