XIIIth Quark Confinement and the Hadron Spectrum

31 July 2018 to 6 August 2018
Maynooth University
Europe/Dublin timezone

First determination of $D^{*}$-meson fragmentation functions and their uncertainties at next-to-next-to-leading order

1 Aug 2018, 16:40
20m
Hall H (Arts Bldg.)

Hall H

Arts Bldg.

Talk C: Heavy quarks

Speaker

Dr Hamzeh Khanpour (University of Science and Technology of Mazandaran & Institute for Research in Fundamental Sciences (IPM), IRAN)

Description

In this talk, I will present the first set of next-to-next-to-leading order (NNLO) fragmentation functions (FFs) describing the production of charmed-meson $D^{*}$ from partons [Phys.Rev. D97 (2018) no.7, 074014]. Exploiting the universality and scaling violations of FFs, we extract the NLO and NNLO FFs through a global fit to all relevant data sets from single-inclusive $e^+e^-$ annihilation. The uncertainties for the resulting FFs as well as the corresponding observables are estimated using the Hessian approach.
We evaluate the quality of the {\tt SKM18} FFs determined in this analysis by comparing with the recent results in literature and show how they describe the available data for single-inclusive $D^{*\pm}$-meson production in electron-positron annihilation.
As a practical application, we apply the extracted FFs to make our theoretical predictions for the scaled-energy distributions of $D^{*\pm}$-mesons
inclusively produced in top quark decays. We explore the implications of {\tt SKM18} for LHC phenomenology and show that our findings of this study can be introduced as a channel to indirect search for top-quark properties.

Primary authors

Dr Hamzeh Khanpour (University of Science and Technology of Mazandaran & Institute for Research in Fundamental Sciences (IPM), IRAN) Dr Maryam Soleymaninia (School of Particles and Accelerators, Institute for Research in) Dr Seyed Mohammad Moosavi Nejad (Yazd univ. IRAN)

Presentation Materials

 Hamzeh Khanpour Quark Confinement-2018.pdf Hamzeh Khanpour Quark Confinement-2018.pptx