372 research outputs found
A Small Target Neutrino Deep-Inelastic Scattering Experiment at the First Muon Collider
Several different scenarios for neutrino scattering experiments using a
neutrino beam from the muon collider complex are discussed. The physics reach
of a neutrino experiment at the front end of a muon collider is shown to extend
far beyond that of current neutrino experiments, since the high intensity
neutrino beams one would see at the muon collider allow for a large flexibility
in choosing neutrino targets. Measurements of quark spin, A-dependence of the
structure function and neutral current chiral couplings to quarks are
outlined.Comment: 7 pages, 2 figures, to appear in the proceedings of the Workshop on
Physics at the First Muon Collider and at the Front End of a Muon Collider,
November 1997, Fermila
Quasi-Elastic Scattering in MINERvA
Determination of the quasi-elastic scattering cross-section over a broad
range of neutrino energies, nuclear targets and Q^2 is a primary goal of the
MINERvA experiment. We present preliminary comparisons of data and simulation
in a sample rich in anti-{\nu}_{\mu}+p\rightarrow{\mu}+n events from
approximately one eighth of the total anti-{\nu} events collected by MINERvA to
date. We discuss future plans for quasi-elastic analyses in MINERvA.Comment: submitted to the proceedings of NuInt11, The Seventh International
Workshop on Neutrino-Nucleus Interactions in the Few GeV Region, Dehradun,
India, March 201
Neutrino-electron elastic scattering for flux determination at the DUNE oscillation experiment
We study the feasibility of using neutrino-electron elastic scattering to
measure the neutrino flux in the DUNE neutrino oscillation experiment. The
neutrino-electron scattering cross section is precisely known, and the
kinematics of the reaction allow determination of the incoming neutrino energy
by precise measurement of the energy and angle of the recoiling electron. For
several possible near detectors, we perform an analysis of their ability to
measure neutrino flux in the presence of backgrounds and uncertainties. With
realistic assumptions about detector masses, we find that a liquid argon
detector, even with limitations due to angular resolution, is able to perform
better than less dense detectors with more precise event-by-event neutrino
energy measurements. We find that the absolute flux normalization uncertainty
can be reduced from ~8% to ~2%, and the uncertainty on the flux shape can be
reduced by ~20-30%
Radiative corrections to inverse muon decay for accelerator neutrinos
Inverse muon decay () is a promising tool to
constrain neutrino fluxes with energies .
Radiative corrections introduce percent-level distortions to energy spectra of
outgoing muons and depend on experimental details. In this paper, we generalize
the calculation of radiative corrections in muon decay to the scattering
processes and . We evaluate virtual and real
contributions and present the muon energy spectrum for both channels,
double-differential distributions in muon energy and muon scattering angle, in
photon energy and photon scattering angle, and photon energy spectrum for the
dominant process. We discuss how radiative
corrections modify experimentally interesting distributions.Comment: 21 pages, 8 figures, v2, structure changed, new cross sections adde
Neutrino Mass and Oscillation
The question of neutrino mass is one of the major riddles in particle
physics. Recently, strong evidence that neutrinos have nonzero masses has been
found. While tiny, these masses could be large enough to contribute
significantly to the mass density of the universe. The evidence for
nonvanishing neutrino masses is based on the apparent observation of neutrino
oscillation -- the transformation of a neutrino of one type or "flavor" into
one of another. We explain the physics of neutrino oscillation, and review and
weigh the evidence that it actually occurs in nature. We also discuss the
constraints on neutrino mass from cosmology and from experiments with negative
results. After presenting illustrative neutrino mass spectra suggested by the
present data, we consider how near- and far-future experiments can further
illuminate the nature of neutrinos and their masses.Comment: 43 pages, 8 figures, to appear in the Annual Review of Nuclear and
Particle Science, Vol. 49 (1999
A Review of Target Mass Corrections
With recent advances in the precision of inclusive lepton--nuclear scattering
experiments, it has become apparent that comparable improvements are needed in
the accuracy of the theoretical analysis tools. In particular, when extracting
parton distribution functions in the large-x region, it is crucial to correct
the data for effects associated with the nonzero mass of the target. We present
here a comprehensive review of these target mass corrections (TMC) to structure
functions data, summarizing the relevant formulas for TMCs in electromagnetic
and weak processes. We include a full analysis of both hadronic and partonic
masses, and trace how these effects appear in the operator product expansion
and the factorized parton model formalism, as well as their limitations when
applied to data in the x->1 limit. We evaluate the numerical effects of TMCs on
various structure functions, and compare fits to data with and without these
corrections.Comment: 41 pages, 13 figures; minor updates to match published versio
- …