A new mechanism for the pp → ppπ reaction close to threshold is suggested coming from the isoscalar excitation of the Roper and its decay into N(ππ)s−wave, with one of the π 0 emitted and the other one reabsorbed on the second nucleon. The mechanism can lead to important interference with other mechanisms and, together with experiment, serves to exclude large ranges of the 2π N decay parameters...

This paper reconsiders the uniform sublevel set estimates of Carbery, Christ, and Wright [5] and Phong, Stein, and Sturm [17] from a geometric perspective. This perspective leads one to consider a natural collection of homogeneous, nonlinear differential operators which generalize mixed derivatives in R. As a consequence, it is shown that, in the case of both of these previous works, improved u...

Supersymmetric models are typically taken to have p parameter and all soft supersymmetry breaking parameters at or near the weak scale. We point out that a small window of allowed values exists in which ~1 and the electroweak gaugino masses are in the few GeV range. Such models naturally solve the supersymmetry CP problem, can reduce the discrepancy in &,, and suppress proton decay. In this win...

We study the asymptotic behaviour of solutions to the porous media equation in an exterior domain, Ω, which excludes one or several holes, with zero Dirichlet data on ∂Ω. We prove that, when the space dimension is three or more, this behaviour is given by a Barenblatt function away from the fixed boundary ∂Ω and near the free-boundary. On the other hand, if we scale the solution according to it...

background: prevalence of fall-related mortality is rising in the elderly population. falling is one of the causes of the murderous and non-murderous injuries in the elderly population which can lead to disability, dependence and decline of quality of life. fractures constitute a major part of the fall-related injuries. the present study is designed to investigate the prevalence of fall-related...

objectives: this study aimed to identify elderly fallers and non-fallers by balance test under dual tasks conditions. methods & materials: this study was an analyze-comparative study. subjects were from three park of tehran. subjects were 20 older adults with outhistory of falls (aged 75.95±6.28 years) and 21 older adults with a history of 2 or more falls in the previous one year (aged 72.50±7....

Head injury is one of the most important types of injury and is responsible for most of the deaths due to trauma. Low-income and middle-income countries face with more risk factors, but they still lack adequate health-care capacity to deal with complications. Trauma literally means the damage and injury, and head injury was defined as physical damage to the brain or skull caused by external for...

The neutral B mesons, B and B s , can oscillate between their particle and antiparticle states owing to flavor-changing weak interactions. In recent years, techniques to detect these oscillations as a function of the meson’s decay time have been developed. In this article the physics of flavor oscillations is reviewed and theoretical predictions are summarized. The many observations that demons...

Stock prices are observed to be random walks in time despite a strong, long term memory in the signs of trades (buys or sells). Lillo and Farmer have recently suggested that these correlations are compensated by opposite long ranged fluctuations in liquidity, with an otherwise permanent market impact, challenging the scenario proposed in Quantitative Finance 4, 176 (2004), where the impact is t...

This paper provides a complete physical picture of optical response time as a function of cell gap (d) in a wide voltage regime. Normally both rise and decay times are known to be proportional to d in the small angle approximation (Vth < V < ffiffiffi 2 p Vth), and in the high voltage regime where Vp < V < Vi the optical decay time is independent of d. In this paper, we found that between these...