7,357 research outputs found
Neutrino Oscillations with the MINOS, MINOS+, T2K, and NOvA Experiments
This paper discusses recent results and near-term prospects of the
long-baseline neutrino experiments MINOS, MINOS+, T2K and NOvA. The non-zero
value of the third neutrino mixing angle {\theta}13 allows experimental
analysis in a manner which explicitly exhibits appearance and disappearance
dependencies on additional parameters associated with mass-hierarchy, CP
violation, and any non-maximal {\theta}23. These current and near-future
experiments begin the era of precision accelerator long-baseline measurements
and lay the framework within which future experimental results will be
interpreted.Comment: 41 pages, 36 figures, submitted to New Journal of Physic
Flow-field in a vortex with breakdown above sharp edged delta wings
The behavior of vortex-flow, accompanied with breakdown, formed above sharp-edged delta wings, was studied experimentally as well as theoretically. Emphasis is placed particularly on the criterion for the breakdown at sufficiently large Reynolds number
Measuring the CP-violating phase by a long base-line neutrino experiment with Hyper-Kamiokande
We study the sensitivity of a long-base-line (LBL) experiment with neutrino
beams from the High Intensity Proton Accelerator (HIPA), that delivers 10^{21}
POT per year, and a proposed 1Mt water-Cherenkov detector, Hyper-Kamiokande
(HK) 295km away from the HIPA, to the CP phase (delta_{M N S}) of the
three-flavor lepton mixing matrix. We examine a combination of the nu_mu
narrow-band beam (NBB) at two different energies, vev{p_pi}=2, 3GeV, and the
bar{nu}_mu NBB at vev{p_pi}=2GeV. By allocating one year each for the two nu_mu
beams and four years for the bar{nu}_mu beam, we can efficiently measure the
nu_mu to nu_e and bar{nu}_mu to bar{nu}_e transition probabilities, as well as
the nu_mu and bar{nu}_mu survival probabilities. CP violation in the lepton
sector can be established at 4sigma (3sigma) level if the MSW
large-mixing-angle scenario of the solar-neutrino deficit is realized, |\dmns|
or |delta{M N S}-180^{circ}| > 30^{circ}, and if 4|U_{e3}|^2 (1-|U_{e3}|^2)
equiv sin^2 2 theta_{CHOOZ} > 0.03 (0.01). The phase delta_{M N S} is more
difficult to constrain by this experiment if there is little CP violation,
delta_{M N S} sim 0^{circ} or 180^{circ}, which can be distinguished at 1sigma
level if sin^2 2 theta_{CHOOZ} >~ 0.01.Comment: 16 pages, 4 figures, 2 tables, we add 1 figure, some refrences, and
minor corrections. PLB published versio
Linear viscoelasticity of entangled wormlike micelles bridged by telechelic polymers : an experimental model for a double transient network
We survey the linear viscoelasticity of a new type of transient network:
bridged wormlike micelles, whose structure has been characterized recently
[Ramos and Ligoure, (2007)]. This composite material is obtained by adding
telechelic copolymers (water-soluble chains with hydrophobic stickers at each
extremity) to a solution of entangled wormlike micelles (WM). For comparison,
naked WM and WM decorated by amphiphilic copolymers are also investigated.
While these latter systems exhibit almost a same single ideal Maxwell behavior,
solutions of bridged WM can be described as two Maxwell fluids components
blends, characterized by two markedly different characteristic times, t_fast
and t_slow, and two elastic moduli, G_fast and G_slow, with G_fast >> G_slow.
We show that the slow mode is related to the viscoelasticity of the transient
network of entangled WM, and the fast mode to the network of telechelic active
chains (i.e. chains that do not form loops but bridge two micelles). The
dependence of the viscoelasticity with the surfactant concentration, phi, and
the sticker-to-surfactant molar ratio, beta, is discussed. In particular, we
show that G_fast is proportional to the number of active chains in the
material, phi beta. Simple theoretical expectations allow then to evaluate the
bridges/loops ratio for the telechelic polymers
Search for new physics via photon polarization of
We suggest a discriminant analysis of new physics beyond the standard model
through a detection of photon polarization in a radiative B meson decay. This
analysis is investigated in SUSY SU(5) GUT with right-handed neutrino and
left-right symmetric models. New physics search via CP asymmetry in the same
process are also evaluated in each model for comparison. We show that new
physics can be found via detecting the photon polarization in a parameter space
of TeV energy scale.Comment: 20 pages, 8 figures, v2:references added, v3:published versio
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