分类: 物理学 >> 基本粒子与场物理学 提交时间: 2016-05-15
摘要: We propose to measure the CP phase delta(CP), the magnitude of the neutrino mixing matrix element \U-e3\ and the sign of the atmospheric scale mass-squared difference Deltam(31)(2) with a superbeam by the joint analysis of two different long baseline neutrino oscillation experiments. One is a long baseline experiment (LBL) at 300 km and the other is a very long baseline (VLBL) experiment at 2100 km. We take the neutrino source to be the approved high intensity proton synchrotron, HIPA. The neutrino beam for the LBL is the 2-degree off-axis superbeam, and for the VLBL a narrowband superbeam. Taking into account all possible errors, we evaluate the event rates required and the sensitivities that can be attained for the determination of delta(CP) and the sign of Deltam(31)(2). We arrive at a representative scenario for a reasonably precise probe of this part of neutrino physics.
分类: 物理学 >> 基本粒子与场物理学 提交时间: 2016-05-15
摘要: We examine the possibility of observing exotic top quark decays via R-parity violating SUSY interactions in e(+)e(-) collisions at roots = 500 GeV. We present cross-sections for tt production followed by the subsequent decay of either the t or (t) over bar via the R-parity violating interaction while the other undergoes the SM decay. We discuss kinematic cuts that allow the exotic SUSY decays to be detected over standard model backgrounds. Discovery limits for R-parity violating couplings in the top sector are presented assuming an integrated luminosity of 100 fb(-1). (C) 2001 Published by Elsevier Science B.V.