We calculate distributions for ττγ production at LEP 1 taking into account a potentially existing anomalous magnetic moment aτ of the τ lepton. The existing upper limits for |aτ | are known from the dependence of the decay Z → ττγ on a2τ and are of the order of (1− 5)%. We show that such limits are also sensitive to linear terms in aτ , which are of equal importance at |aτ | ∼ (1− 2)% and domin...

My research on bounded polynomials stems from the original proof of Schmüdgen’s Positivstellensatz [4] which provides algebraic criteria for positivity of a polynomial. This proof follows from a solution of the K-moment problem for compact sets i.e. finding a measure such that consecutive momentum has a prescribed value. One can observe that the key ingredient is boundedness of coordinates on t...

The paper is a continuation of work initiated by the first two authors in [K–M]. Section 1 is introductory. In Section 2 we give new proofs of results of Scheiderer in [S1] [S2] in the compact case; see Corollaries 2.3, 2.4 and 2.5. The main tool in Section 2, Lemma 2.1, is also used in Section 3 where we continue the examination of the case n = 1 initiated in [K–M], concentrating on the compac...

A. T. Tasci, A. Senol, and C. Verep Department of Physics, Kastamonu University, 37100, Kastamonu, Turkey Abstract In this study we examine both anomalous magnetic and dipole moment type couplings of a heavy quark via its single production with subsequent dominant Standard Model decay modes at the Compact Linear Collider (CLIC). The signal and background cross sections are analyzed for heavy qu...

We discuss some of the problems that may occur in the calculation of complicated Feynman diagrams. These include the group independent evaluation of color factors, and the summation techniques that are needed for the expansion of diagrams into their Mellin moments.

When a suspension consisting of dielectric particles having nonlinear characteristics is subjected to a sinusoidal (ac) field, the electrical response will in general consist of ac fields at frequencies of the higher-order harmonics. These ac responses will also be anisotropic. In this work, a self-consistent formalism has been employed to compute the induced dipole moment for suspensions in wh...