For simplicity, we follow the rules: x, y are sets, N is an element of N, c, i, j, k, m, n are natural numbers, D is a non empty set, s is an element of 2Set Seg(n + 2), p is an element of the permutations of n-element set, p1, q1 are elements of the permutations of (n+ 1)-element set, p2 is an element of the permutations of (n+ 2)-element set, K is a field, a, b are elements of K, f is a finit...

Using BABAR measurements of the inclusive electron spectrum in B → Xueν decays and the inclusive photon spectrum in B → Xsγ decays, we extract the magnitude of the CKM matrix element Vub. The extraction is based on several theoretical calculations designed to reduce the theoretical uncertainties by exploiting the assumption that the leading shape functions are the same for all b → q transitions...

A new method for the determination of the CKM rnwng matnx element i$b has been proposed It has been shown, that at future colhders one will measure the tb-xmxmg element with an accuracy 12-28 %

The gray filled circle represents the coupling of the virtual photon to the target, taking the target from an initial state X to some final state Y , which we incorporate into a scattering amplitude factor ˆ ν (q), where M q = p − p� = k� − k. The full matrix element for the process is: M = (−ie)ū(p�)γμu(p) −igμν ˆ ν (q) (1) q2 M Parts a) and b) of the problem analyze the structure of the ū(p�)...

The large sample of Z collected by ALEPH during the LEP1 consists of about 4.5 million hadronic decays. Out of them, about 1 million of bb̄ events allow to investigate rare processes which could help constraining the CKM mixing matrix, before the start of the new experiments at the B factories and hadronic colliders. In this report I will present the measurements of the B(b → ulνX) [1] which all...

In this paper, a modification on the fixed grid finite element method is presented and used in the solution of 2D linear elastic problems. This method uses non-boundary-fitted meshes for the numerical solution of partial differential equations. Special techniques are required to apply boundary conditions on the intersection of domain boundaries and non-boundary-fitted elements. Hence, a new met...

In the current paper, finite element method is employed for numerical simulations and the study of influential parameters on elastic modulus of polymer-matrix nano-composites. Effects of different key parameters including particle elastic modulus, interphase elastic modulus, matrix elastic modulus, interphase thickness and particle volume fraction on total elastic modulus of nano-composite mate...

We determine the CKM matrix element |Vcb| using a sample of 3.33 million BB̄ events in the CLEO detector at CESR. We determine the yield of reconstructed B → D∗+lν decays as a function of w = vB · vD∗ , and from this we obtain the differential decay rate dΓ/dw. By extrapolating dΓ/dw to w = 1, the kinematic point at which the D is at rest relative to the B, we extract the product |Vcb|F (1), whe...