ITA
ENG

Test of exotic scalar and tensor couplings in K+ -> pi(0)e(+)nu decay

Authors

Shimizu, S Horie, K Abe, M Aoki, M Arai, I Asano, Y Baker, T Blecher, M Chapman, MD Depommier, P Grigorjev, MP Hasinoff, M Huang, HC Igarashi, Y Ikeda, T Imazato, J Ivashkin, AP Kang, JH Khabibullin, MM Khotjantsev, AN Kudenko, YG Kuno, Y Lee, JM Lee, KS Levchenko, AS Lim, GY Macdonald, JA Mindas, CR Mineev, OV Sekikawa, S Shimizu, HM Shin, YH Shin, YM Sim, KS Suzuki, A Tashiro, T Watanabe, A Wright, DH Yokoi, T

Citation

S. Shimizu et al., Test of exotic scalar and tensor couplings in K+ -> pi(0)e(+)nu decay, PHYS LETT B, 495(1-2), 2000, pp. 33-41

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICS LETTERS B

ISSN journal

03702693 → ACNP

Volume

495

Issue

1-2

Year of publication

2000

Pages

33 - 41

Database

ISI

SICI code

0370-2693(200012)495:1-2<33:TOESAT>2.0.ZU;2-C

Abstract

The form factors of the decay K+ --> pi (0)(e)+nu (K-e3(+)) have been measu red with stopped kaons. A Dalitz plot containing 4.1 x 10(4) events was ana lyzed. A comparison of the observed Dalitz plot with a Monte Carlo simulati on determined the ratio of the strengths of possible scalar and tensor coup lings 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). The se values are consistent with the standard model prediction of zero, and di sagree with a previous experiment. The analysis also yielded the coefficien t of the q(2) term in the vector form factor to be lambda (+) = 0.0278 +/- 0.0026(stat) +/- 0.0030(syst). (C) 2000 Elsevier Science B.V. All rights re served.