11,089 research outputs found
Learning about the CP phase in the next 10 years
We assess the sensitivity to the lepton CP phase by accelerator and reactor
experiments in the near future, characterizing it globally by means of the CP
exclusion fraction measure. Such measure quantifies what fraction of the
space can be excluded at given input values of
and . For some region of the parameter space, we find that T2K
and NOA combined can exclude about of the
space at with a 5 years running in each neutrino and antineutrino
modes. A determination of the mass hierarchy would be possible for a modest
portion of the parameter space at .Comment: 3 pages, 1 figure (not present in main paper 1307.3248), to appear in
proceedings of NOW 201
The Sao Mateus - Jabaquara Trolleybusway Concession in Brazil
The authors describe how Sao Paulo State granted a 20-year concession for operating a busway, one requirement for which was that the concessionaire replace the diesel bus operation with electric traction (trolleys). This was not a"greenfield concession"but is probably the only"busway"concession undertaken so far worldwide. With roughly 16,000 buses fighting their way through heavy traffic under traffic policies geared to automobiles, bus services was slow and unreliable. Then Sao Paulo adopted certain practices aimed at improving bus operations. Between 1983 and 1987, it implemented a segregated trolleybus corridor between Sao Mateus and Jabaquara, to be opened as a private concession regulated by the state of Sao Paulo. The concession was to operate for 20 years but the winning consortium had to invest in only part of the equipment, because part of it was in place. This made things less risky for the private consortium and allowed thestate to complete an environmentally friendly project with the help of the private sector. The concession has so far been a success - an example to be followed. After an initial increase, demand for the busway began to fall in 1998 and 1999. This was part of a general decline in demand for the bus system because of: a) A drop in jobs resulting from the economic slowdown. b) A growth in the use of automobiles. c) Competition from illegal buses (vans), which offer door-to-door service. The state was late in completing the aerial network for the trolleyway and rehabilitating sections of the roadway. This delayed replacement of diesel buses by trolleybuses. State representatives indicated it might be better in future to find a mechanism through which the concessionaire instead of the state would undertake infrastructure works and would also handle administration of integration terminals.Roads&Highways,Public Sector Economics&Finance,Banks&Banking Reform,Urban Transport,Decentralization,Roads&Highways,Airports and Air Services,Inter-Urban Roads and Passenger Transport,Transport and Environment,Urban Transport
Di-Photon excess in the 2HDM: hasting towards the instability and the non-perturbative regime
We challenge the interpretation of the di-photon excess recently observed by
both ATLAS and CMS in a two Higgs doublet framework. Due to the large
enhancement necessary to obtain the observed di-photon signal, a large number
of colored and charged vector-like fermions are called for. We find that even
before the hypercharge gauge coupling becomes non perturbative, the one loop
effects of these fermions abruptly drive the scalar potential to instability.Comment: 11 pages, 2 figure
The Reservation Wage Unemployment Duration Nexus
A thorny problem in identifying the determinants of reservation wages and particularly the role of continued joblessness in their evolution is the simultaneity issue. We deploy a natural control function approach to the problem that involves conditioning elapsed duration on completed unemployment duration in the reservation wage equation. Our analysis confirms that the use of elapsed duration alone compounds two separate and opposing influences. Only with the inclusion of completed duration is the negative effect of continued joblessness on reservation wages apparent. For its part, the completed duration coefficient suggests that higher reservation wages negatively influence the probability of exiting unemployment.reservation wages, unemployment duration, control function
Distorted Neutrino Oscillations From Ultralight Scalar Dark Matter
Cold, ultralight ( eV) bosonic dark matter with a misalignment abundance
can induce temporal variation in the masses and couplings of Standard Model
particles. We find that fast variations in neutrino oscillation parameters can
lead to significantly distorted neutrino oscillations (DiNOs) and yield
striking signatures at long baseline experiments. We study several
representative observables to demonstrate this effect and find that current and
future experiments including DUNE and JUNO are sensitive to a wide range of
viable scalar parameters over many decades in mass reach.Comment: 5+2 pages, 4 figures , 2 appendice
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