Journal Article/Contribution to a conference proceedings/Contribution to a book

PUBDB-2023-07721

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png $m_B$ and $f_{B^{(\star)}}$ in $2+1$ flavour QCD from a combination of continuum limit static and relativistic results

Conigli, A. (Corresponding author)Extern* ; Frison, J. ; Fritzsch, P. ; Gérardin, A. ; Heitger, J. ; Herdoiza, G. ; Kuberski, S. ; Pena, C. ; Simma, H.DESY* ; Sommer, R.DESY*

2023
SISSA Trieste

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Please use a persistent id in citations: doi:10.22323/1.453.0237  doi:10.3204/PUBDB-2023-07721

Report No.: DESY-23-217; HU-EP-23/70; MS-TP-23-54; arXiv:2312.10017

Abstract: We present preliminary results for B-physics from a combination of non-perturbative results in the static limit with relativistic computations satisfying $am_{\mathrm{heavy}}\ll 1$. Relativistic measurements are carried out at the physical b-quark mass using the Schr\"{o}dinger Functional in a $0.5 \ \mathrm{fm}$ box. They are connected to large volume observables through step scaling functions that trace the mass dependence between the physical charm region and the static limit, such that B-physics results can be obtained by interpolation; the procedure is designed to exactly cancel the troublesome $\alpha_s(m_{\mathrm{heavy}})^{n+\gamma}$ corrections to large mass scaling. Large volume computations for both static and relativistic quantities use CLS $N_f=2+1$ ensembles at $m_u=m_d=m_s$, and with five values of the lattice spacing down to $0.039$ fm.Our preliminary results for the b-quark mass and leptonic decay constants have competitive uncertainties, which are furthermore dominated by statistics, allowing for substantial future improvement. Here we focus on numerical results, while the underlying strategy is discussed in a companion contribution \cite[1].

Keyword(s): bottom: mass ; scaling ; flavor ; quantum chromodynamics ; lattice ; lattice field theory ; charm ; nonperturbative ; mass dependence ; continuum limit ; numerical calculations ; B: leptonic decay ; B*(5320)

Note: Lattice 2023 talk

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Contributing Institute(s):

1. Zeuthen Particle PhysicsTheory (Z_ZPPT)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. GRK 2149 - GRK 2149: Starke und schwache Wechselwirkung - von Hadronen zu Dunkler Materie (269952272) (269952272)
3. GRK 2575 - GRK 2575: Überdenken der Quantenfeldtheorie (417533893) (417533893)

Experiment(s):

1. No specific instrument

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Database coverage:
; ; ; ; DOAJ Seal ; SCOPUS

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Conigli, A. (Corresponding author)Extern* ; Frison, J.DESY* ; Fritzsch, P. ; Gérardin, A. ; Heitger, J. ; Herdoiza, G. ; Kuberski, S. ; Pena, C. ; Simma, H.DESY* ; Sommer, R.DESY*
$m_B$ and $f_{B^{(\star)}}$ in $2+1$ flavour QCD from a combination of continuum limit static and relativistic results
[10.3204/PUBDB-2024-00394]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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