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FLAG Review 2024
/ Flavour Lattice Averaging Group (FLAG) Collaboration
We review lattice results related to pion, kaon, $D$-meson, $B$-meson, and nucleon physics with the aim of making them easily accessible to the nuclear and particle physics communities. [...]
arXiv:2411.04268 ; CERN-TH-2024-192 ; FERMILAB-PUB-24-0785-T.
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435.
Fermilab Library Server - Fulltext - Fulltext
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2.
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A non-perturbative determination of $b_{\rm g}$
/ Dalla Brida, Mattia (CERN) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Ramos, Alberto (Valencia U., IFIC) ; Sint, Stefan (TCD, Dublin) ; Sommer, Rainer (Julich, NIC ; DESY ; Humboldt U., Berlin) ; Höllwieser, Roman (Wuppertal U.)
Close to the continuum limit, lattice QCD with mass-degenerate Wilson quarks can be described by Symanzik's effective continuum action, which contains the dimension 5 operator, $m\,{\rm tr}(F_{\mu\nu}F_{\mu\nu})$. Its effect can be eliminated by an O($am_{\rm q}$) rescaling of the bare lattice coupling constant. [...]
arXiv:2401.05791.-
2024-05-02 - 8 p.
- Published in : PoS: LATTICE2023 (2024) , pp. 295
Fulltext: document - PDF; 2401.05791 - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.295
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3.
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A strategy for B-physics observables in the continuum limit
/ Sommer, Rainer (DESY, Zeuthen ; Humboldt U., Berlin) ; Conigli, Alessandro (CSIC, Madrid ; Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Frison, Julien (DESY, Zeuthen) ; Fritzsch, Patrick (TCD, Dublin) ; Gérardin, Antoine (Marseille, CPT) ; Heitger, Jochen (U. Munster) ; Herdoiza, Gregorio (CSIC, Madrid) ; Kuberski, Simon (CERN ; Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Pena, Carlos (CSIC, Madrid) ; Simma, Hubert (DESY, Zeuthen)
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 $1/m_h=1/m_{\rm heavy}$. [...]
arXiv:2312.09811; HU-EP-23/71; DESY-23-216; MS-TP-23-53.-
2024-05-07 - 10 p.
- Published in : PoS LATTICE2023 (2024) 268
Fulltext: 2312.09811 - PDF; document - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.268
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4.
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Heavy Wilson Quarks and O($a$) Improvement: Nonperturbative Results for $b_{\rm g}$
/ Dalla Brida, Mattia (CERN) ; Höllwieser, Roman (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Sint, Stefan (Hamilton Math. Inst., Dublin) ; Sommer, Rainer (Humboldt U., Berlin)
/ALPHA Collaboration
With Wilson quarks, on-shell O($a$) improvement of the lattice QCD action is achieved by including the Sheikholeslami-Wohlert term and two further operators of mass dimension 5, which amount to a mass-dependent rescaling of the bare parameters. We here focus on the rescaled bare coupling, $\tilde{g}_0^2 = g_0^2(1 + b_{\rm g} am_{\rm q})$, and the determination of $b_{\rm g}(g_0^2)$, which is currently only known to 1-loop order of perturbation theory. [...]
arXiv:2401.00216.-
2024-01-31 - 26 p.
- Published in : JHEP 2024 (2020) 188
Fulltext: 2401.00216 - PDF; document - PDF;
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5.
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$m_b$ and $f_{B^{(*)}}$ in 2 + 1 flavour QCD from a combination of continuum limit static and relativistic results
/ Conigli, Alessandro (CSIC, Madrid ; Helmholtz-Zentrum, Berlin ; Darmstadt, GSI) ; Frison, Julien (DESY, Zeuthen) ; Fritzsch, Patrick (TCD, Dublin) ; Gérardin, Antoine (Marseille, CPT) ; Heitger, Jochen (U. Munster) ; Herdoiza, Gregorio (CSIC, Madrid) ; Kuberski, Simon (CERN ; Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Pena, Carlos (CSIC, Madrid) ; Simma, Hubert (Humboldt U., Berlin) ; Sommer, Rainer (DESY, Zeuthen ; Humboldt U., Berlin)
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 Schrödinger Functional in a $0.5 \ \mathrm{fm}$ box. [...]
arXiv:2312.10017; HU-EP-23/70; DESY-23-217; MS-TP-23-54.-
2023-12-27 - 11 p.
- Published in : PoS: LATTICE2023 (2024) , pp. 237
Fulltext: document - PDF; 2312.10017 - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.237
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6.
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Determination of $\alpha _s(m_Z)$ by the non-perturbative decoupling method
/ Dalla Brida, Mattia (CERN) ; Höllwieser, Roman (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Nada, Alessandro (Turin U.) ; Ramos, Alberto (Valencia U., IFIC) ; Sint, Stefan (Hamilton Math. Inst., Dublin) ; Sommer, Rainer (Humboldt U., Berlin ; DESY)
/ALPHA Collaboration
We present the details and first results of a new strategy for the determination of $\alpha_s(m_Z)$. By simultaneously decoupling 3 fictitious heavy quarks we establish a relation between the $\Lambda$-parameters of three-flavor QCD and pure gauge theory. [...]
arXiv:2209.14204; IFIC/22-25; WUB/22-00; DESY-22-051; CERN-TH-2022-015; HU-EP-22/04.-
2022-12-03 - 62 p.
- Published in : Eur. Phys. J. C 82 (2022) 1092
Fulltext: 2209.14204 - PDF; Publication - PDF;
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7.
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A lattice QCD perspective on weak decays of b and c quarks Snowmass 2022 White Paper
/ Boyle, Peter A. (Brookhaven ; U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Chakraborty, Bipasha (Cambridge U., DAMTP) ; Davies, Christine T.H. (Glasgow U.) ; DeGrand, Thomas (Colorado U.) ; DeTar, Carleton (Utah U.) ; Del Debbio, Luigi (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; El-Khadra, Aida X. (Illinois U., Urbana) ; Erben, Felix (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Flynn, Jonathan M. (U. Southampton (main)) ; Gámiz, Elvira (Granada U., Theor. Phys. Astrophys.) et al.
Lattice quantum chromodynamics has proven to be an indispensable method to determine nonperturbative strong contributions to weak decay processes. [...]
arXiv:2205.15373 ; CERN-TH-2022-036 ; FERMILAB-CONF-22-433-SCD-T ; JLAB-THY-22-3582,
MITP-22-020 ; MIT-CTP/5413 ; MS-TP-22-07 ; SI-HEP-2022-11.
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19.
Fermilab Library Server - eConf - Fulltext - Fulltext
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8.
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Results for $\alpha_s$ from the decoupling strategy
/ Brida, Mattia Dalla (CERN) ; Höllwieser, Roman (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Nada, Alessandro (NIC, Zeuthen) ; Ramos, Alberto (Valencia U., IFIC) ; Sint, Stefan (Trinity Coll., Dublin) ; Sommer, Rainer (NIC, Zeuthen ; Humboldt U., Berlin)
/ALPHA Collaboration
We present analysis details and new results for the strong coupling $\alpha_s(m_Z)$, determined by the decoupling strategy. We measure a massive gradient flow (GF) coupling defined in finite volume with Schrödinger functional (SF) boundary conditions in a theory with $N_\text{f}=3$ degenerate heavy quarks of mass $M$. [...]
arXiv:2112.09623.-
2022-05-16 - 10 p.
- Published in : PoS: LATTICE2021 (2022) , pp. 492
Fulltext: 2112.09623 - PDF; document - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.492
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9.
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Scale Setting for CLS 2+1 Simulations
/ Strassberger, Ben (NIC, Zeuthen) ; Cè, Marco (CERN) ; Collins, Sara (Regensburg U.) ; Gérardin, Antoine (Marseille, CPT) ; von Hippel, Georg (Mainz U.) ; Korcyl, Piotr (Jagiellonian U.) ; Korzec, Tomasz (Bergische U., Wuppertal (main)) ; Mohler, Daniel (Darmstadt, GSI) ; Risch, Andreas (NIC, Zeuthen) ; Schaefer, Stefan (NIC, Zeuthen) et al.
We present an update of the scale setting for $N_f=2+1$ flavor QCD using gradient flow scales and pseudo-scalar decay constants. We analyze the latest ensembles with $2+1$ flavors of non-perturbatively improved Wilson fermions generated by CLS for improved precision. [...]
arXiv:2112.06696; DESY-21-175; WUB/21-05.-
2022-05-16 - 10 p.
- Published in : PoS: LATTICE2021 (2022) , pp. 135
Fulltext: document - PDF; 2112.06696 - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.135
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10.
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Precision $B^*B\pi$ coupling from three-flavor lattice QCD
/ Gérardin, Antoine (Marseille, CPT) ; Heitger, Jochen (Munster U., ITP) ; Kuberski, Simon (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; Simma, Hubert (NIC, Zeuthen) ; Sommer, Rainer (NIC, Zeuthen ; Humboldt U., Berlin)
/ALPHA Collaboration
We consider three-flavor QCD and perform a determination of the low-energy coupling $\hat{g}_\chi$ of SU(2) Heavy Meson Chiral Perturbation Theory. It is the $B^*B\pi$ coupling in the limit of static heavy and chiral light quarks and has not been determined with precision thus far. [...]
arXiv:2111.04693; MS-TP-21-31; MITP-21-052; DESY-21-176.-
2022-05-16 - 9 p.
- Published in : PoS LATTICE2021 (2022) 540
Fulltext: document - PDF; 2111.04693 - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.540
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