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Chebyshev and Backus-Gilbert reconstruction for inclusive semileptonic $B_{(s)}$-meson decays from Lattice QCD
/ Barone, Alessandro (U. Mainz, PRISMA ; Southampton U.) ; Hashimoto, Shoji (KEK, Tsukuba ; Sokendai, Tsukuba) ; Jüttner, Andreas (Southampton U. ; CERN) ; Kaneko, Takashi (KEK, Tsukuba ; Sokendai, Tsukuba ; KMI, Nagoya) ; Kellermann, Ryan (KEK, Tsukuba ; Sokendai, Tsukuba)
We present a study on the nonperturbative calculation of observables for inclusive semileptonic decays of $B_{(s)}$ mesons using lattice QCD. We focus on the comparison of two different methods to analyse the lattice data of Euclidean correlation functions, specifically Chebyshev and Backus-Gilbert approaches. [...]
arXiv:2312.17401; KEK-TH-2590.-
2024-05-04 - 10 p.
- Published in : PoS: LATTICE2023 (2024) , pp. 236
Fulltext: document - PDF; 2312.17401 - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.236
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2.
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Updates on inclusive charmed and bottomed meson decays from the lattice
/ Kellermann, Ryan (KEK, Tsukuba) ; Barone, Alessandro (U. Mainz, PRISMA ; U. Southampton (main)) ; Hashimoto, Shoji (KEK, Tsukuba) ; Jüttner, Andreas (U. Southampton (main) ; CERN) ; Kaneko, Takashi (KEK, Tsukuba ; KMI, Nagoya)
With the development of lattice QCD in recent years, a determination of decay rates for inclusive semileptonic decays from lattice correlators now seems viable. [...]
arXiv:2405.06152.
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Fulltext
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Approaches to inclusive semileptonic B$_{(s)}$-meson decays from Lattice QCD
/ Barone, Alessandro (Southampton U. ; KEK, Tsukuba) ; Hashimoto, Shoji (KEK, Tsukuba ; Sokendai, Tsukuba) ; Jüttner, Andreas (Southampton U. ; CERN) ; Kaneko, Takashi (KEK, Tsukuba ; Sokendai, Tsukuba ; KMI, Nagoya) ; Kellermann, Ryan (KEK, Tsukuba ; Sokendai, Tsukuba)
We address the nonperturbative calculation of the inclusive decay rate of semileptonic $B_{(s)}$-meson decays from lattice QCD. Precise Standard-Model predictions are key ingredients in searches for new physics, and this type of computation may eventually provide new insight into the long-standing tension between the inclusive and exclusive determinations of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements $|V_{cb}|$ and $|V_{ub}|$. [...]
arXiv:2305.14092; KEK-CP-0394; CERN-TH-2023-087.-
2023-07-18 - 43 p.
- Published in : JHEP 2307 (2023) 145
Fulltext: 2305.14092 - PDF; Publication - PDF;
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Inclusive semi-leptonic $B_{(s)}$ mesons decay at the physical $b$ quark mass
/ Barone, Alessandro (Southampton U.) ; Jüttner, Andreas (Southampton U. ; CERN) ; Hashimoto, Shoji (KEK, Tsukuba ; Sokendai, Tsukuba) ; Kaneko, Takashi (KEK, Tsukuba ; Sokendai, Tsukuba ; KMI, Nagoya) ; Kellermann, Ryan (KEK, Tsukuba ; Sokendai, Tsukuba)
We address the non-perturbative calculation of the decay rate of inclusive semi-leptonic $B_{(s)}$ mesons decays from lattice QCD. Precise theoretical Standard Model predictions are key ingredients in searches for new physics. [...]
arXiv:2211.15623.-
2022-12-22 - 10 p.
- Published in : PoS: LATTICE2022 (2023) , pp. 403
Fulltext: document - PDF; 2211.15623 - PDF;
In : 39th International Symposium on Lattice Field Theory (Lattice 2022), Bonn, Germany, 8 - 13 Aug 2022, pp.403
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5.
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Inclusive semi-leptonic decays of charmed mesons with Möbius domain wall fermions
/ Kellermann, Ryan (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Barone, Alessandro (Southampton U.) ; Hashimoto, Shoji (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Jüttner, Andreas (Southampton U. ; U. Southampton (main) ; CERN) ; Kaneko, Takashi (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies ; KMI, Nagoya)
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 $|V_{ub}|$ and $|V_{cb}|$ from exclusive and inclusive processes, recently, the use of lattice QCD has been extended towards the description of inclusive decays. [...]
arXiv:2211.16830.-
2023 - 9 p.
- Published in : PoS: LATTICE2022 (2023) , pp. 414
- Published in : PoS
Fulltext: document - PDF; 2211.16830 - PDF;
In : 39th International Symposium on Lattice Field Theory (Lattice 2022), Bonn, Germany, 8 - 13 Aug 2022, pp.414
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6.
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BSM $B - \bar{B}$ mixing on JLQCD and RBC/UKQCD $N_f=2+1$ DWF ensembles
/ Boyle, Peter (U. Edinburgh, Higgs Ctr. Theor. Phys. ; Brookhaven) ; Erben, Felix (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Jüttner, Andreas (Southampton U. ; CERN) ; Kaneko, Takashi (KEK, Tsukuba ; Sokendai, Tsukuba) ; Marshall, Michael (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Portelli, Antonin (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Witzel, Oliver (U. Siegen (main)) ; Del Debbio, Luigi (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Tsang, Justus Tobias (Southern Denmark U., CP3-Origins)
We are presenting our ongoing Lattice QCD study on $B - \bar{B}$ mixing on several RBC/UKQCD and JLQCD ensembles with 2+1 dynamical-flavour domain-wall fermions, including physical-pion-mass ensembles. We are extracting bag parameters $B_{B_d}$ and $B_{B_s}$ using the full 5-mixing-operator basis to study both Standard-Model mixing as well as Beyond the Standard Model mixing, using a fully correlated combined fit to two-point functions and ratios of three-point and two-point functions. [...]
arXiv:2111.11287.-
2022-05-16 - 10 p.
- Published in : PoS: LATTICE2021 (2022) , pp. 224
Fulltext: 2111.11287 - PDF; document - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.224
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7.
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Improved lattice fermion action for heavy quarks
/ Cho, Yong-Gwi (Tsukuba U., GSPAS) ; Hashimoto, Shoji (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Jüttner, Andreas (Southampton U.) ; Kaneko, Takashi (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Marinkovic, Marina (CERN ; Southampton U.) ; Noaki, Jun-Ichi (KEK, Tsukuba) ; Tsang, Justus Tobias (Southampton U.)
We develop an improved lattice action for heavy quarks based on Brillouin-type fermions, that have excellent energy-momentum dispersion relation. The leading discretization errors of $O(a)$ and $O(a^2)$ are eliminated at tree-level. [...]
arXiv:1504.01630; UTHEP-673; KEK-CP-321; CERN-PH-TH-2015-074; CERN-PH-TH-2015-074.-
Geneva : CERN, 2015-05-14 - 33 p.
- Published in : JHEP 05 (2015) 072
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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8.
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Charm physics with Moebius Domain Wall Fermions
/ Tsang, Justus Tobias (Southampton U.) ; Jüttner, Andreas (Southampton U.) ; Sanfilippo, Francesco (Southampton U.) ; Boyle, Peter (Edinburgh U.) ; Marinkovic, Marina (Southampton U. ; CERN) ; Hashimoto, Shoji (KEK, Tsukuba ; Sokendai, Tsukuba) ; Kaneko, Takashi (KEK, Tsukuba ; Sokendai, Tsukuba) ; Cho, Yong-Gwi (Tsukuba U., GSPAS)
We present results showing that Domain Wall fermions are a suitable discretisation for the simulation of heavy quarks. This is done by a continuum scaling study of charm quarks in a M\"obius Domain Wall formalism using a quenched set-up. [...]
arXiv:1501.00660.-
SISSA, 2014-12-18 - 7 p.
- Published in : PoS LATTICE2014 (2014) 379
Fulltext: arXiv:1501.00660 - PDF; LATTICE2014_379 - PDF; External link: Preprint
In : 32nd International Symposium on Lattice Field Theory, Columbia U., New York, NY, USA, 23 - 28 Jun 2014, pp.379
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9.
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Scaling study of an improved fermion action on quenched lattices
/ Cho, Yong-Gwi (Tsukuba U., GSPAS) ; Hashimoto, Shoji (KEK, Tsukuba ; Sokendai, Tsukuba) ; Noaki, Jun-Ichi (KEK, Tsukuba ; Sokendai, Tsukuba) ; Kaneko, Takashi (KEK, Tsukuba ; Sokendai, Tsukuba) ; Jüttner, Andreas (Southampton U.) ; Tsang, Justus (Southampton U.) ; Marinkovic, Marina (Southampton U. ; CERN)
We present scaling studies for heavy-quark observables calculated with an $O(a^2)$-improved fermion action on tree-level Symanzik improved gauge configurations. Lattices of $1/a = $ 2.0-3.8 GeV with an equal physical volume 1.6 fm are used. [...]
arXiv:1412.6206; UTHEP-665; CERN-PH-TH-2014-258; KEK-CP-317; UTHEP-665; CERN-PH-TH-2014-258; KEK-CP-317.-
SISSA, 2014-12-17 - 7 p.
- Published in : PoS LATTICE2014 (2014) 381
Fulltext: PDF; External link: PoS server
In : 32nd International Symposium on Lattice Field Theory, Columbia U., New York, NY, USA, 23 - 28 Jun 2014, pp.381
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