Time Evolution of Decay Spectrum in K^0, K^0 bar -> pi^+ pi^- e^+ e^-
Abstract
We consider the decay K^0 (K^0 bar) -> pi^+ pi^- e^+ e^- of a neutral K meson prepared in a state of strangeness +1 (-1). The time evolution of the state produces remarkable time-dependent effects in the angular distribution of the pi^+ pi^- e^+ e^- system. These effects are correlated with the time-dependence of the photon polarization in the radiative decay K^0 (K^0 bar) -> pi^+ pi^- gamma. We study, in particular, the CP-odd, T-odd term in the distribution d Gamma / d phi of the angle between the pi^+ pi^- and the e^+ e^- planes. We also give the spectrum in the case that the decaying meson is an incoherent mixture of K^0 and K^0 bar, and discuss the case of K_S regeneration in a K_L beam.
Keywords
Cite
@article{arxiv.hep-ph/0006336,
title = {Time Evolution of Decay Spectrum in K^0, K^0 bar -> pi^+ pi^- e^+ e^-},
author = {L. M. Sehgal and J. van Leusen},
journal= {arXiv preprint arXiv:hep-ph/0006336},
year = {2016}
}
Comments
16 pages, 8 figures, minor typos corrected, to appear in Phys. Lett. B