6,239 research outputs found
New Physics Discovery Potential in Future Experiments
We propose a method to estimate the probability of new physics discovery in
future high energy physics experiments. Physics simulation gives both the
average numbers of background and of signal events. We find that the
proper definition of the significance for , >> 1 is S_{12} =
sqrt(+) - sqrt() in comparison with often used significances S_1 =
/sqrt() and S_2 = /sqrt( + ). We propose a method for
taking into account the systematical errors related to nonexact knowledge of
background and signal cross sections. An account of such systematics is very
essential in the search for supersymmetry at LHC. We also propose a method for
estimation of exclusion limits on new physics in future experiments.Comment: 1 latex files (22 pages), 3 eps files (figures), introduced
normalized kappa, added comments to ref.[9
Geometric phase for neutrino propagation in magnetic field
The geometric phase for neutrinos propagating in an adiabatically varying
magnetic field in matter is calculated. It is shown that for neutrino
propagation in sufficiently large magnetic field the neutrino eigenstates
develop a significant geometric phase. The geometric phase varies from 2
for magnetic fields fraction of a micro gauss to for fields gauss or more. The variation of geometric phase with magnetic field
parameters is shown and its phenomenological implications are discussed
Socioeconophysics: Opinion Dynamics for number of transactions and price, a trader based model
Involving effects of media, opinion leader and other agents on the opinion of
individuals of market society, a trader based model is developed and utilized
to simulate price via supply and demand. Pronounced effects are considered with
several weights and some personal differences between traders are taken into
account. Resulting time series and probabilty distribution function involving a
power law for price come out similar to the real ones.Comment: will be published in IJMPC 17 (2006
The Role of Temporary Help Employment in Low-wage Worker Advancement
We examine the effects of temporary help service employment on later earnings and employment for individuals participating in three federal programs providing supportive services to those facing employment difficulties. The programs include Temporary Assistance for Needy Families, whose participants are seriously disadvantaged; a job training program with a highly heterogeneous population of participants; and employment exchange services, whose participants consist of Unemployment Insurance claimants and individuals seeking assistant in obtaining employment. We undertake our analyses for two periods: the late 1990s, a time of very strong economic growth, and shortly after 2000, a time of relative stagnation. Our results suggest that temporary help service firms may facilitate quicker access to jobs for those seeking employment assistance and impart substantial benefits as transitional employment, especially for individuals whose alternatives are severely limited. Those who do not move out of temporary help jobs, however, face substantially poorer prospects, and we observe that nonwhites are more likely than whites to remain in THS positions in the two years following program participation. Our results are robust to program and time period.temporary help, mediated employment, program evaluation
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