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Inclusive semi-leptonic decays of charmed mesons with Möbius domain wall fermions

Inclusive semi-leptonic decays of charmed mesons with Möbius domain wall fermions
Inclusive semi-leptonic decays of charmed mesons with Möbius domain wall fermions
We perform a non-perturbative lattice calculation of the decay rates for inclusive semi-leptonic decays of charmed mesons. In view of the long-standing tension in the determination of the CKM matrix elements |Vub| and |Vcb| from exclusive and inclusive processes, recently, the use of lattice QCD has been extended towards the description of inclusive decays. Since the determination of hadronic input parameters from QCD based methods require independent tests, we focus on the charm sector, since it not only offers experimental data, but also well determined CKM parameters. We carry out a pilot lattice simulation for the Ds→Xsℓν and explore the improvement of existing techniques. Our simulation employs Möbius domain-wall charm and strange quarks whose masses are tuned to be approximately physical and we cover the whole kinematical region. We report on our progress in analyzing different sources of systematic effects, such as the extrapolation of the kernel function chosen for the Chebsyhev approximation as well as the influence on the analysis in the region close to the kinematical limit.
hep-lat
Kellermann, Ryan
e648d747-545c-4371-b656-7638b10ac138
Barone, Alessandro
6101b472-6a3f-4f75-81c5-1987eeb455db
Hashimoto, Shoji
2b3be047-9e76-42d7-ba7e-50f230e88446
Jüttner, Andreas
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Kaneko, Takashi
c02e60bd-618e-4c8a-b0e1-22a19d877c50
Kellermann, Ryan
e648d747-545c-4371-b656-7638b10ac138
Barone, Alessandro
6101b472-6a3f-4f75-81c5-1987eeb455db
Hashimoto, Shoji
2b3be047-9e76-42d7-ba7e-50f230e88446
Jüttner, Andreas
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Kaneko, Takashi
c02e60bd-618e-4c8a-b0e1-22a19d877c50

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Record type: UNSPECIFIED

Abstract

We perform a non-perturbative lattice calculation of the decay rates for inclusive semi-leptonic decays of charmed mesons. In view of the long-standing tension in the determination of the CKM matrix elements |Vub| and |Vcb| from exclusive and inclusive processes, recently, the use of lattice QCD has been extended towards the description of inclusive decays. Since the determination of hadronic input parameters from QCD based methods require independent tests, we focus on the charm sector, since it not only offers experimental data, but also well determined CKM parameters. We carry out a pilot lattice simulation for the Ds→Xsℓν and explore the improvement of existing techniques. Our simulation employs Möbius domain-wall charm and strange quarks whose masses are tuned to be approximately physical and we cover the whole kinematical region. We report on our progress in analyzing different sources of systematic effects, such as the extrapolation of the kernel function chosen for the Chebsyhev approximation as well as the influence on the analysis in the region close to the kinematical limit.

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2211.16830v1 - Author's Original
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Published date: 30 November 2022
Additional Information: 9 pages, 6 figures, Proceedings of the 39th International Symposium on Lattice Field Theory, 8th-13th August 2022, Bonn, Germany
Keywords: hep-lat

Identifiers

Local EPrints ID: 473775
URI: http://eprints.soton.ac.uk/id/eprint/473775
PURE UUID: e4a87ad3-7646-416a-9db5-f67c6cb400df
ORCID for Alessandro Barone: ORCID iD orcid.org/0000-0002-0036-2517
ORCID for Andreas Jüttner: ORCID iD orcid.org/0000-0002-3978-0927

Catalogue record

Date deposited: 31 Jan 2023 17:44
Last modified: 17 Mar 2024 03:57

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Contributors

Author: Ryan Kellermann
Author: Shoji Hashimoto
Author: Takashi Kaneko

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