3,954 research outputs found
The hadronic vacuum polarization contribution to from full lattice QCD
We determine the contribution to the anomalous magnetic moment of the muon
from the hadronic vacuum polarization diagram using
full lattice QCD and including quarks with physical masses for the first
time. We use gluon field configurations that include , , and
quarks in the sea at multiple values of the lattice spacing, multiple
masses and multiple volumes that allow us to include an analysis of
finite-volume effects. We obtain a result for of
, where the first error is from the lattice calculation and the
second includes systematic errors from missing QED and isospin-breaking effects
and from quark-line disconnected diagrams. Our result implies a discrepancy
between the experimental determination of and the Standard Model of
3.Comment: 14 pages, 10 figures. Discussion of method extended with additional
tests and figures added. Typographical errors correcte
Colorado River Basin Study Comments--Colorado River Water Conservation District
Comments on the Colorado River Basin Study prepared by the the Western Water Policy Review Advisory Commission
Measuring Active-Sterile Neutrino Oscillations with a Stopped Pion Neutrino Source
The question of the existence of light sterile neutrinos is of great interest
in many areas of particle physics, astrophysics, and cosmology. Furthermore,
should the MiniBooNE experiment at Fermilab confirm the LSND oscillation
signal, then new measurements are required to identify the mechanism
responsible for these oscillations. Possibilities include sterile neutrinos, CP
or CPT violation, variable mass neutrinos, Lorentz violation, and extra
dimensions. In this paper, we consider an experiment at a stopped pion neutrino
source to determine if active-sterile neutrino oscillations with delta-m
greater than 0.1 eV2 can account for the signal. By exploiting stopped pi+
decay to produce a monoenergetic nu_mu source, and measuring the rate of the
neutral current reaction nu_x + 12C -> nu_x +12C* as a function of distance
from the source, we show that a convincing test for active-sterile neutrino
oscillations can be performed.Comment: 10 pages, 9 figure
Great Lakes Water Quality Status Report on Organic and Heavy Metal Contaminants in the Lakes Erie, Michigan, Huron and Superior Basins to the Implementation Committee of the Great Lakes Water Quality Board
Opportunities for lattice QCD in quark and lepton flavor physics
This document is one of a series of whitepapers from the USQCD collaboration.
Here, we discuss opportunities for lattice QCD in quark and lepton flavor
physics. New data generated at Belle II, LHCb, BES III, NA62, KOTO, and
Fermilab E989, combined with precise calculations of the relevant hadronic
physics, may reveal what lies beyond the Standard Model. We outline a path
toward improvements of the precision of existing lattice-QCD calculations and
discuss groundbreaking new methods that allow lattice QCD to access new
observables.Comment: USQCD whitepape
PQChPT with Staggered Sea and Valence Ginsparg-Wilson Quarks: Vector Meson Masses
We consider partially quenched, mixed chiral perturbation theory with
staggered sea and Ginsparg-Wilson valence quarks in order to extract a
chiral-continuum extrapolation expression for the vector meson mass up to order
O(a^2), at one-loop level. Based on general principles, we accomplish the task
without explicitly constructing a sophisticated, heavy vector meson chiral
Lagrangian.Comment: 12 pages, 1 figure, REVTe
IMPROVING CYANOBACTERIA AND CYANOTOXIN MONITORING IN SURFACE WATERS FOR DRINKING WATER SUPPLY
Deciding When to Intervene: Data Interpretation Tools for Making Sediment Management Decisions Beyond Source Control. Based on a Workshop Held at the GLIER, University of Windsor, December 1-2, 1998
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