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

PUBDB-2025-01983

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A strategy for B-physics observables in the continuum limit

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

2023
SISSA Trieste

This record in other databases:    

Please use a persistent id in citations: doi:10.22323/1.453.0268  doi:10.3204/PUBDB-2025-01983

Report No.: DESY-23-216; HU-EP-23/71; MS-TP-23-53; arXiv:2312.09811

Abstract: In a somewhat forgotten paper [1] it was shown how to perform interpolations between relativistic and static computations in order to obtain results for heavy-light observables for masses from, say, $m_{\rm charm}$ to $m_{\rm bottom}$. All quantities are first continuum extrapolated and then interpolated in $1/m_h=1/m_{\rm heavy}$. Large volume computations are combined with finite volume ones where a relativistic bottom quark is accessible with small $am_{\rm bottom}$. We discuss how this strategy is extended to semi-leptonic form factors and other quantities of phenomenological interest. The essential point is to form quantities where the limit $m_h\to\infty$ is approached with power corrections O$(1/m_h)$ only. Perturbative corrections $\sim\alpha_s(m_h)^{\gamma+n}$ are cancelled in the construction of the observables. We also point out how such an approach can help to control systematics in semi-leptonic decays with just large volume data. First numerical results with $N_f = 2 + 1$ and lattice spacings down to 0.039 fm are presented in [2].

Keyword(s): perturbation theory: correction ; lattice ; charm ; quark: mass ; continuum limit ; form factor ; numerical calculations ; finite size

Note: cc-by-nc-ndLattice 2023 talk

---

Contributing Institute(s):

1. Zeuthen Particle PhysicsTheory (Z_ZPPT)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. EuroPLEx - European network for Particle physics, Lattice field theory and Extreme computing (813942) (813942)
3. STRONG-2020 - The strong interaction at the frontier of knowledge: fundamental research and applications (824093) (824093)
4. GRK 2149 - GRK 2149: Starke und schwache Wechselwirkung - von Hadronen zu Dunkler Materie (269952272) (269952272)
5. GRK 2575 - GRK 2575: Überdenken der Quantenfeldtheorie (417533893) (417533893)

Experiment(s):

1. No specific instrument

---

Database coverage:
; ; ; ; DOAJ Seal ; SCOPUS

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Conigli, A. ; Frison, J.DESY* ; Fritzsch, P. ; Gérardin, A. ; Heitger, J. ; Herdoiza, G. ; Kuberski, S. ; Pena, C. ; Simma, H.DESY* ; Sommer, R. (Corresponding author)DESY*
A strategy for B-physics observables in the continuum limit
[10.3204/PUBDB-2023-07493]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---