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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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Systematic effects in the lattice calculation of inclusive semileptonic decays
/ Kellermann, R. (KEK, Tsukuba) ; Barone, A. (U. Mainz, PRISMA) ; Elgaziari, A. (U. Southampton (main)) ; Hashimoto, S. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Hu, Z. (KEK, Tsukuba) ; Jüttnerc, A. (U. Southampton (main) ; CERN) ; Kaneko, T. (KEK, Tsukuba ; KMI, Nagoya)
We report on the calculation of the inclusive semileptonic decay of the $D_s$ meson on the lattice. [...]
arXiv:2411.18058 ; KEK-CP-0405.
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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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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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Studies on finite-volume effects in the inclusive semileptonic decays of charmed mesons
/ Kellermann, Ryan (Sokendai, Tsukuba ; KEK, Tsukuba) ; Barone, Alessandro (U. Mainz, PRISMA ; U. Southampton (main)) ; Hashimoto, Shoji (Sokendai, Tsukuba ; KEK, Tsukuba) ; Jüttner𝑐, Andreas (U. Southampton (main) ; CERN) ; Kaneko𝑎, Takashi (CERN ; KMI, Nagoya ; Sokendai, Tsukuba ; KEK, Tsukuba)
We report on the calculation of the inclusive semileptonic decay of the $D_s$ meson on the lattice. We simulate the $D_s \rightarrow X_s\ell\nu_\ell$ process with Möbius domain-wall charm and strange quarks, whose masses were approximately tuned to the physical values. [...]
arXiv:2312.16442; KEK-TH-2591.-
2024-05-04 - 7 p.
- Published in : PoS LATTICE2023 (2024) 272
Fulltext: document - PDF; 2312.16442 - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.272
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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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FLAG Review 2021
/ 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. More specifically, we report on the determination of the light-quark masses, the form factor $f_+(0)$ arising in the semileptonic $K \to \pi$ transition at zero momentum transfer, as well as the decay constant ratio $f_K/f_\pi$ and its consequences for the CKM matrix elements $V_{us}$ and $V_{ud}$. [...]
arXiv:2111.09849; CERN-TH-2021-191; JLAB-THY-21-3528; FERMILAB-PUB-21-620-SCD-T.-
2022-10-04 - 418 p.
- Published in : Eur. Phys. J. C 82 (2022) 869
Fulltext: fermilab-pub-21-620-scd-t - PDF; 2111.09849 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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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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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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Charge transfer between rotating complex scalar fields
/ Domcke, Valerie (CERN ; EPFL, Lausanne, LPPC) ; Harigaya, Keisuke (CERN ; Tokyo U., IPMU) ; Mukaida, Kyohei (KEK, Tsukuba ; Sokendai, Tsukuba)
We consider the transfer of a $U$(1) charge density between Bose-Einstein condensates of complex scalar fields coupled to a thermal bath, focusing on the case of a homogeneous Affleck-Dine field transmitting the charge stored in its angular motion to an axion field. We demonstrate that in the absence of additional symmetries this charge transfer, aided by cosmic expansion as well as the thermal effective potential of the Affleck-Dine field, can be very efficient. [...]
arXiv:2205.00942; CERN-TH-2022-075; KEK-TH-2422.-
2022-08-23 - 31 p.
- Published in : JHEP 2208 (2022) 234
Fulltext: 2205.00942 - PDF; document - PDF;
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