PEN实验：π⁺→e⁺ν衰变分支比的精确测量
高能物理 - 实验
2010-01-15 v1
摘要
一项新的（即衰变分支比）测量正在保罗·谢勒研究所进行。当前的实验结果是可用的最精确的轻子普适性检验。然而，其精度仍落后于理论精度一个数量级以上。由于衰变受到强烈的螺旋度压制，其分支比容易受到来自新物理的显著贡献，这使得该衰变成为一个特别适合的研究对象。
引用
@article{arxiv.0909.4358,
title = {PEN experiment: a precise measurement of the pi+ -> e+ nu decay branching fraction},
author = {PEN Collaboration and D. Pocanic and L. P. Alonzi and V. A. Baranov and W. Bertl and M. Bychkov and Yu. M. Bystritsky and E. Frlez and V. A. Kalinnikov and N. V. Khomutov and A. S. Korenchenko and S. M. Korenchenko and M. Korolija and T. Kozlowski and N. P. Kravchuk and N. A. Kuchinsky and D. Mekterovic and D. Mzhavia and A. Palladino and P. Robmann and A. M. Rozhdestvensky and S. N. Shkarovskiy and U. Straumann and I. Supek and P. Truoel and Z. Tsamalaidze and A. van der Schaaf and E. P. Velicheva and V. P. Volnykh},
journal= {arXiv preprint arXiv:0909.4358},
year = {2010}
}
备注
4 pages, 3 figures, talk given at the Tenth Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2009), La Jolla/San Diego, CA, 26-31 May 2009; to appear in Proceedings to be published by the American Institute of Physics