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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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Fermilab Library Server - eConf - Fulltext - Fulltext
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Semileptonic $D \rightarrow \pi \ell \nu$, $D \rightarrow K \ell \nu$ and $D_s \rightarrow K \ell \nu$ decays with 2+1f domain wall fermions
/ Marshall, Michael (Edinburgh U.) ; Boyle, Peter (Brookhaven ; Edinburgh U.) ; Del Debbio, Luigi (Edinburgh U.) ; Erben, Felix (Edinburgh U.) ; Flynn, Jonathan (Southampton U.) ; Jüttner, Andreas (Southampton U. ; CERN) ; Portelli, Antonin (Edinburgh U.) ; Tsang, Justus Tobias (Southern Denmark U., CP3-Origins) ; Witzel, Oliver (Siegen U.)
We present the status of our project to calculate $D \to \pi \ell \nu$, $D \to K \ell \nu$ and $D_s \to K \ell \nu$ semileptonic form factors using domain wall fermions for both heavy and light quarks. Our computations are performed using RBC/UKQCD's set of 2+1 flavour domain wall fermion and Iwasaki gauge field ensembles. [...]
arXiv:2201.02680.-
2022-05-16 - 11 p.
- Published in : PoS LATTICE2021 (2022) 416
Fulltext: document - PDF; 2201.02680 - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.416
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Form factors for semileptonic $B\to \pi\ , B_s\to K$ and $B_s\to D_s$ decays
/ Flynn, Jonathan (Southampton U.) ; Hill, Ryan (Southampton U.) ; Juettner, Andreas (CERN ; Southampton U.) ; Soni, Amarjit (Brookhaven) ; Tsang, Justus Tobias (Southern Denmark U., CP3-Origins) ; Witzel, Oliver (Siegen U.)
We report on our determinations of $B\to \pi\ell\nu$, $B_s\to K \ell \nu$ and $B_s\to D_s \ell \nu$ semileptonic form factors. In addition we discuss the determination of $R$-ratios testing lepton-flavor universality and suggest an improved ratio. [...]
arXiv:2112.10580; Siegen SI-HEP-2021-36.-
2022-05-16 - 11 p.
- Published in : PoS LATTICE2021 (2022) 306
Fulltext: 2112.10580 - PDF; document - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.306
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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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Scaling test of two-flavor O(a)-improved lattice QCD
/ Della Morte, Michele (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin) ; Fritzsch, Patrick (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin) ; Meyer, Harvey (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin) ; Simma, Hubert (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin) ; Sommer, Rainer (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin) ; Takeda, Shinji (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin) ; Witzel, Oliver (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin) ; Wolff, Ulli (CERN ; Munster U. ; MIT ; Milan Bicocca U. ; DESY ; Humboldt U., Berlin)
We report on a scaling test of several mesonic observables in the non-perturbatively O(a) improved Wilson theory with two flavors of dynamical quarks. The observables are constructed in a fixed volume of 2.4fm x (1.8fm)^3 with Schroedinger functional boundary conditions. [...]
arXiv:0804.3383; CERN-PH-TH-2008-079; DESY-08-043; HU-EP-08-12; MIT-CTP-3942; MS-TP-08-5; SFB-CPP-08-22; CERN-PH-TH-2008-079; DESY-2008-043; HU-EP-2008-12; MIT-CTP-3942; MS-TP-2008-5; SFB-CPP-2008-22.-
2008 - 12 p.
- Published in : JHEP 07 (2008) 037
Fulltext: arXiv:0804.3383 - PDF; JHEP07(2008)037 - PDF; SISSA/IOP Open Access article: PDF; External link: Fulltext
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Preparing for N(f) = 2 simulations at small lattice spacings
/ Della Morte, M. (CERN) ; Fritzsch, P. (Munster U.) ; Leder, B. (Humboldt U., Berlin) ; Takeda, S. (Humboldt U., Berlin) ; Witzel, O. (Humboldt U., Berlin) ; Wolff, U. (Humboldt U., Berlin) ; Meyer, H. (MIT) ; Simma, H. (DESY, Zeuthen) ; Sommer, R. (DESY, Zeuthen)
We discuss some large effects of dynamical fermions. One is a cutoff effect, others concern the contribution of multi-pion states to correlation functions and are expected to survive the continuum limit. [...]
arXiv:0710.1263; DESY-07-159; SFB-CPP-07-55; MS-TP-07-35; CERN-PH-TH-2007-170; HU-EP-07-46; MIT-CTP-3873; DESY 07-159; SFB-CPP-07-55; MS-TP-07-35; CERN-PH-TH-2007-170; HU-EP-07-46; MIT-CTP 3873.-
2007 - 7 p.
- Published in : PoS: LATTICE 2007 (2007) , pp. 255
Fulltext: PDF; Published version from PoS: PDF; External link: Proceedings of Science Server
In : 25th International Symposium on Lattice Field Theory, Regensburg, Germany, 30 Jul - 4 Aug 2007, pp.255
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