Radius of theρmeson determined from its decay constant

The nuclear radius from alpha decay

2014 Nuclear radii for mass numbers between A = 140 and 252 have been computed from 121 alpha decays between ground states of even-even nuclei. We use for that the two-body solution for the square well potential that we gave recently. The computed radii obey the A 1/3 law and they are consistent with the precise radii obtained from electron scattering. These two sets of radii show structures wh...

Leptonic constant from B meson radiative decay

We propose a method to determine the leptonic decay constant fB∗ in the infinite heavy quark mass limit from the analysis of the radiative decay mode B− → lν̄lγ. The method relies on HQET symmetries and on experimental data from D∗0 → Dγ. E-mail address: [email protected] The measurement of fB and fB∗ , the leptonic decay constants of the B and B ∗ mesons, defined by the matrix elements: < ...

extraction and acetylation of purified trypsin from bovin pancreas and study of some its physico-chemical properties

آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...

Fission decay rates determined from a quantal transport equation

The decay of a metastable system is described by extending Kramers' method to the quantal regime. For temperatures above twice the crossover value we recover the result known from applying Euclidean path integrals to solvable models. Our derivation is not restricted to a linearly coupled heat bath of oscillators, and thus applicable to nuclear systems.

s ( M 2 Z ) determined from hadronic tau decay measurements