An Asymmetric B Factory at 10^(36) Luminosity

The physics opportunities at an asymmetric B Factory operating at the unprecedented luminosity of 10^(36) cm^(–2) s^(–1) are unique and attractive. The accelerator appears to be practical and the challenges of performing a sensitive experiment in this environment can be met

First CP Violation Results from BABAR

We present a preliminary measurement of time-dependent CP-violating asymmetries in B^0-->J/psi K_S and B^0-->psi(2S) K_S decays recorded by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The data sample consists of 9.0 fb-1 collected at the Upsilon(4S) resonance and 0.8 fb-1 off-resonance. One of the neutral B mesons, produced in pairs at the Upsilon(4S), is fully reconstructed. The flavor of the other neutral B meson is tagged at the time of its decay, mainly with the charge of identified leptons and kaons. The time difference between the decays is determined by measuring the distance between the decay vertices. Wrong-tag probabilities and the time resolution function are measured with samples of fully-reconstructed semileptonic and hadronic neutral B final states. The value of the asymmetry amplitude, sin(2*beta), is determined from a maximum likelihood fit to the time distribution of 120 tagged B^0-->J/psi K_S and B^0-->psi(2S) K_S candidates: sin(2*beta) = 0.12+/-0.37(stat)+/-0.09(syst).Comment: 19 pages, 10 postscript figures, contributed to the Proceedings of ICHEP200

The tracker and calorimeter systems of the Mu2e experiment

The Mu2e experiment at Fermilab is a sensitive search for lepton flavor violation via muon-to-electron conversion in the field of an aluminum nucleus. The requirements for the tracking and calorimeter systems of the experiment, as well as the design of systems that fulfill these requirements, are briefly described

The Very Big ILC

In the spirit of Leon Lederman's 1977 proposal for the siting of the VBA, we propose a version of the International Linear Collider along the US-Mexico border

The Very Big ILC

In the spirit of Leon Lederman's 1977 proposal for the siting of the VBA, we propose a version of the International Linear Collider along the US-Mexico border

US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report

This white paper summarizes the workshop "U.S. Cosmic Visions: New Ideas in Dark Matter" held at University of Maryland on March 23-25, 2017

A New Determination of the (Z,A) Dependence of Coherent Muon-to-Electron Conversion

Should muon-to-electron conversion in the field of a nucleus be found in the current generation of experiments, the measurement of the atomic number dependence of the process will become an important experimental goal. We present a new treatment of the (Z,A) dependence of coherent muon-to-electron conversion in 236 isotopes. Our approach differs from previous treatments in several ways. Firstly, we include the effect of permanent quadrupole deformation on the charged lepton flavor violating matrix elements, using the method of Barrett moments. This method also enables the addition of muonic X-ray nuclear size and shape determinations of the charge distribution to the electron scattering results used previously. Secondly, we employ a Hartree-Bogoliubov model to calculate neutron-related matrix elements for even-even nuclei. This takes into account the quadrupole deformation of the neutron distributions and the fact that neutrons are, in general, in different shell model orbits than protons. The calculated conversion rates differ from previous calculations, particularly in the region of large permanent quadrupole deformation. Finally, we propose an alternative normalization of the muon-to-electron conversion rated, which related more closely to what a given experiment acturally measures, and better separate lepton physics from nuclear physics effects.Comment: 19 pages, 9 figure