# Annual Meeting of the SFB TRR 257

6-8 October 2020
Europe/Berlin timezone

## On the status of the heavy quark expansion for charmed hadrons

7 Oct 2020, 12:04
18m

### Speaker

Daniel Moreno (University of Siegen)

### Description

The heavy quark expansion (HQE), which provides a perturbative expansion in the inverse heavy quark mass, has proven to be very successful for describing bottomed hadrons. However, its applicability has often been questioned for charmed hadrons due to the charm quark is actually not so heavy. In this talk we revisit the status of the HQE for charm. In particular, we study pseudoscalar $D$-meson semileptonic and nonleptonic decay widths including available NLO QCD and subleading $1/m_c$ corrections. We find good agreement with experimental data up to large uncertainties due to hadronic matrix elements and the charm quark mass definition. We also study the behavior of the HQE for observables specially designed for charm, where the free quark decay contribution cancels to a large extent.

### Presentation Materials

###### Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×