منابع مشابه
Ĝ Ĝ Λ 11 Λ 12 Λ 21 Λ 21 Λ 22 Λ 22 Λ Λ̃ 0 0 Λ̂
In this paper we present an algorithm for pricing barrier options in one-dimensional Markov models. The approach rests on the construction of an approximating continuous-time Markov chain that closely follows the dynamics of the given Markov model. We illustrate the method by implementing it for a range of models, including a local Lévy process and a local volatility jump-diffusion. We also pro...
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Sokoloski et al (2008) have recently reported evidence that the recurrent nova RS Ophi-uchi produced a pair of highly collimated radio jets within days of its 2006 outburst. This suggests that an accretion disc must be present during the outburst. However in the standard picture of recurrent novae as thermonuclear events, any such disc must be expelled from the white dwarf vicinity, as the nucl...
متن کاملEmission line variability of RS Ophiuchi ⋆
We report that the Hα emission line of RS Oph was strongly variable during our 2004 observations on a time scale of 1 month. The line consisted of both a double peaked central narrow component (FWHM∼220 km s) and a strongly variable broad one (FWHM>2000 km s). The base of the Hα line was very broad with FWZI≈4600 km s on all spectra from 1986 to 2004. The variability of the broad component exte...
متن کاملRare Λ b → Λ l + l − Decays with Polarized Λ
We investigate the rare baryonic exclusive decays of Λb → Λll (l = e, μ, τ) with polarized Λ. Under the approximation of the heavy quark effective theory (HQET), in the standard model we derive the differential decay rates and various polarization asymmetries by including lepton mass effects. We find that with the long-distance effects the decay branching ratios are 5.3× 10 for Λb → Λll (l = e,...
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ژورنال
عنوان ژورنال: Nature
سال: 1876
ISSN: 0028-0836,1476-4687
DOI: 10.1038/014309d0