On the Top Mass Reconstruction Using Leptons

I discuss the feasibility of measuring the top quark mass by the using of final states with leptons and J/\psi at hadron colliders. I also investigate the impact of matrix-element corrections to the HERWIG simulation of top decays.Comment: 4 pages, 3 figures. Talk given at the UK Phenomenology Workshop on Collider Physics, Durham, U. K., 19-24 September 1999. Revised version with updated result

Heavy flavours: theory summary

I summarize the theory talks given in the Heavy Flavours Working Group. In particular, I discuss heavy-flavour parton distribution functions, threshold resummation for heavy-quark production, progress in fragmentation functions, quarkonium production, heavy-meson hadroproduction.Comment: 6 pages. Talk given at DIS 2005, XIII Workshop on Deep Inelastic Scattering, April 27-May 1, 2005, Madison, WI, U.S.

Top Mass Measurement and Bottom Fragmentation at the LHC

We show some recent HERWIG results related to the top quark mass measurement at the LHC and discuss possible improvements for studies of the bottom quark fragmentation function in the top decay.Comment: 4 pages, 1 figure. Talk given at DPF 2000, Meeting of the Division of Particle and Fields of the American Physical Society, Columbus, Ohio, U.S.A., 9-12 August 200

Interpretation of the top-quark mass results

I discuss recent work aimed at interpreting the top-quark mass measurements at the LHC and determining the theoretical uncertainty.Comment: 5 pages. Talk given at DIS 2017, April 3-7 2017, Birmingham, UK. References fixe

Parton showers with medium-modified splitting functions

I discuss the recent implementation of medium-modified splitting functions within the HERWIG angular-ordered parton shower algorithm and present a few results on transverse momentum, energy and angular distributions.Comment: 5 pages, 4 figures, 1 table. Talk given at XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2010, April 19-23, 2010, Firenze, Ital

Fragmentation of bottom quarks in top quark decay

We review the main aspects of the fragmentation of bottom quarks in top quark decay. The NLO b-quark energy spectrum presents large mass logarithms ln(m_t^2/m_b^2), which can be resummed by the use of the approach of perturbative fragmentation functions. Large soft contributions in both coefficient function and initial condition of the perturbative fragmentation function have been resummed as well. Results on the energy distribution of b quarks and b-flavoured hadrons are finally presented in both x and moment spaces.Comment: 6 pages, 5 figures. Talk given at Incontri sulla Fisica delle Alte Energie, Torino, Italy, 14-16 April 200