نتایج جستجو برای: dkp

تعداد نتایج: 183  

Journal: :International Journal of Modern Physics 2023

In this article, we solve the Duffin--Kemmer--Petiau (DKP) equation in presence of hyperbolic tangent potential for spin-one particles. By partitioning spinor, show that DKP is equivalent to Klein--Gordon formalism. The scattering solutions are derived terms hypergeometric functions. reflection $R$ and transmission $T$ coefficients calculated Gamma results superradiance phenomenon when a specif...

2008
P. M. Santini

We have recently solved the inverse spectral problem for oneparameter families of vector fields, and used this result to construct the formal solution of the Cauchy problem for a class of integrable nonlinear partial differential equations in multidimensions, including the second heavenly equation of Plebanski and the dispersionless Kadomtsev Petviashvili (dKP) equation, arising as commutation ...

2009
T. R. Cardoso

Vector couplings in the Duffin-Kemmer-Petiau theory are revised. It is shown that minimal and nonminimal vector potentials behave differently under charge-conjugation and time-reversal transformations. In particular, it is shown that nonminimal vector potentials have been erroneously applied to the description of elastic meson-nucleus scatterings and that the space component of the nonminimal v...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده علوم پایه 1391

معادله ی dkp (duffin-kemmer-petiau)، یک معادله ی نسبیتی مرتبه ی اول برای بوزون های اسپین صفر و یک می باشد و دردهه ی 1930توسط duffin ,kemmer ,petiau ارائه شد و این نظریه در سال های 1939 تا 1970 در زمینه های مختلف توسعه یافت. این معادله در بسیاری از شاخه های فیزیک از جمله کیهان شناسی ، برهم کنش های هادرون- هسته و طیف سنجی مزون ها کاربرد دارد از این رو می توان ذراتی مانند فوتون ها، گلوئون ها، مزون...

Journal: :Angewandte Chemie 2021

The presence of amino acids on the prebiotic Earth, either stemming from endogenous chemical routes or delivered by meteorites, is consensually accepted. Prebiotically plausible pathways to peptides inactivated are still unclear as most oligomerization approaches rely thermodynamically disfavored reactions in solution. Now, a combination prebiotically minerals and mechanochemical activation ena...

2008
P. M. Santini

We have recently solved the inverse spectral problem for oneparameter families of vector fields, and used this result to construct the formal solution of the Cauchy problem for a class of integrable nonlinear partial differential equations in multidimensions, including the second heavenly equation of Plebanski and the dispersionless Kadomtsev Petviashvili (dKP) equation, arising as commutation ...

Journal: :Chemical communications 2012
Miriam Góngora-Benítez Michèle Cristau Matthieu Giraud Judit Tulla-Puche Fernando Albericio

A new universal strategy exploits DKP formation in a dipeptide moiety whose C-terminal residue is blocked by a leaving group. It enables both synthesis of C-terminal protected peptides that are useful for convergent synthesis of large peptides and use of a C-terminal permanent protecting group that can be cleaved by catalytic hydrogenation to release the peptide.

2013
Francisco Guil Manuel Mañas Luis Mart́ınez Alonso

The factorization problem for the group of canonical transformations close to the identity and the corresponding twistor equations for an ample family of canonical variables are considered. A method to deal with these reductions is developed for the construction classes of nontrivial solutions of the dKP equation.

2007
Kanehisa Takasaki

We review the notion of differential Fay identities and demonstrate, through case studies, its new role in integrable hierarchies of the KP type. These identities are known to be a convenient tool for deriving dispersionless Hirota equations. We show that differential (or, in the case of the Toda hierarchy, difference) Fay identities play a more fundamental role. Namely, they are nothing but a ...

Journal: :Advances in High Energy Physics 2018

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