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T: Fachverband Teilchenphysik
T 52: Flavour Physics III
T 52.4: Vortrag
Mittwoch, 2. April 2025, 17:00–17:15, VG 1.104
Charm-Quark Mass in the Heavy Quark Expansion — •Anastasia Boushmelev1, Thomas Mannel1, and K. Keri Vos2 — 1Theoretische Physik 1, Center for Particle Physics Siegen Universität Siegen, D-57068 Siegen, Germany — 2Gravitational Waves and Fundamental Physics (GWFP), Maastricht University, Duboisdomein 30, NL-6229 GT Maastricht, the Netherlands and Nikhef, Science Park 105, NL-1098 XG Amsterdam, the Netherlands
The Heavy Quark Expansion is a powerful framework for making predictions for inclusive heavy hadron decays. It provides a method to calculate decay rates and spectra as a double expansion in powers of ΛQCD/mQ and αs(mQ) and is well established for b-decays enabling precise predictions for various observables. In this context, the quark mass in an appropriate scheme is determined with sub-percent precision, and αs(mQ) is as low as 0.1.
Though, considering the charm sector, the treatment of the quark mass has to be further investigated as these mass schemes are not suitable in this case. Here we suggest to replace the charm mass, as well as further non-perturbative quantities, directly by q2 moments based on a similar strategy applied on b-decays using e+e− inverse moments studied in [1]. Following this strategy we study the impact on the perturbative series of q2 moments, as well as the total rate.
[1] A. Boushmelev, T. Mannel and K. K. Vos, JHEP 07 (2023), 175 doi:10.1007/JHEP07(2023)175 [arXiv:2301.05607 [hep-ph]].
Keywords: Heavy Quark Expansion; Effective Theories; Charm Physics; Mass Schemes; HQET