ar X iv : h ep - t h / 97 07 03 9 v 1 3 J ul 1 99 7 A Single Classical Quark

ar X iv : h ep - t h / 97 07 03 7 v 2 3 J ul 1 99 7 On quark mass correction to the string potential

Following recent work by Lambiase and Nesterenko we study in detail the interquark potential for a Nambu-Goto string with point masses attached to its ends. We obtain exact solutions to the gap equations for the Lagrange multipliers and metric components and determine the potential without simplifying assumptions. We also discuss Lüscher term and argue that it remains universal. 12.38.Aw,12.39....

ar X iv : h ep - t h / 97 03 01 9 v 1 3 M ar 1 99 7 DAMTP 97 – 12 On the generalizations of Poisson structures

The characterization of the Nambu-Poisson n-tensors as a subfamily of the Generalized-Poisson ones recently introduced is discussed. The homol-ogy and cohomology complexes associated with both higher order Poisson structures are compared, and some physical considerations are made.

ar X iv : h ep - t h / 97 03 05 4 v 1 6 M ar 1 99 7 Symmetries and the Antibracket : The Batalin - Vilkovisky Method

ar X iv : h ep - p h / 99 06 27 3 v 1 7 J un 1 99 9 BUTP

Corrections of O(α 2 s) to the decay of the top quark into a W boson and a bottom quark are calculated. The method is based on an expansion of the top quark propa-gator for small external momentum, q, as compared to the top quark mass, M t. The physical point q 2 = M 2 t is reached through Padé approximations. The described method allows to take effects induced by a finite W boson mass into acc...

ar X iv : h ep - p h / 97 03 35 8 v 1 1 8 M ar 1 99 7 Do the quark masses run ? Extracting m̄ b ( m Z ) from LEP data

The decay width of the Z gauge boson into three jets has already been computed at the leading order (LO) including complete quark mass effects [1–3] where it has been shown that mass effects could be as large as 1% to 6%, depending on the value of the mass and the jet resolution parameter yc. In fact, these effects had already been seen in the experimental tests of the flavor independence of th...