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Form factors for semileptonic B-decays with HISQ light quarks and clover b-quarks in Fermilab interpretation / Jeong, Hwancheol (Indiana U.) ; DeTar, Carleton (Utah U.) ; El-Khadra, Aida X. (Tata Inst. ; Bielefeld U. ; CERN ; Kaiserslautern U. ; Illinois U., Urbana) ; Gámiz, Elvira (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys.) ; Gelzer, Zechariah (Tata Inst. ; Bielefeld U. ; CERN ; Kaiserslautern U. ; Illinois U., Urbana) ; Gottlieb, Steven (Indiana U.) ; Jay, William (MIT, Cambridge, CTP) ; Kronfeld, Andreas (Fermilab) ; Lytle, Andrew (Tata Inst. ; Bielefeld U. ; CERN ; Kaiserslautern U. ; Illinois U., Urbana) ; Vaquero, Alejandro (Zaragoza U.)
We compute the vector, scalar, and tensor form factors for the $B\to \pi$, $B\to K$, and $B_s\to K$ amplitudes, which are needed to describe semileptonic $B$-meson decay rates for both the charged and neutral current cases. We use the highly improved staggered quark (HISQ) action for the sea and light valence quarks. [...]
arXiv:2402.14924; FERMILAB-CONF-24-0077-T.- 2024-05-04 - 9 p.
- Published in : PoS: LATTICE2023 (2024) , pp. 253 Fulltext: document - PDF; 2402.14924 - PDF; 477e115143aafe3f8c7fb18cda1d585b - PDF; External link: Fermilab Library Server
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.253

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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. - 19.
Fermilab Library Server - eConf - Fulltext - Fulltext

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Theoretical progress on the V_us determination from tau decays / Gamiz, Elvira (Illinois U., Urbana) ; Jamin, Matthias (ICREA, Barcelona ; Barcelona, IFAE) ; Pich, Antonio (Valencia U., IFIC) ; Prades, Joaquim (CERN ; CAFPE, Granada ; Granada U., Theor. Phys. Astrophys.) ; Schwab, Felix (Barcelona, IFAE)
A very precise determination of V_us can be obtained from the semi-inclusive hadronic decay width of the tau lepton into final states with strangeness. The ratio of the Cabibbo-suppressed and Cabibbo-allowed tau decay widths directly measures (V_us/V_ud)^2, up to very small SU(3)-breaking corrections which can be theoretically estimated with the needed accuracy. [...]
arXiv:0709.0282; CERN-PH-TH-2007-147; IFIC-07-52; FTUV-07-0903; CERN-PH-TH-2007-147; IFIC-07-52; FTUV-07-0903.- 2007 - 9 p. - Published in : PoS: KAON (2008) , pp. 008
Fulltext: KAON_008 - PDF; arXiv:0709.0282 - PDF; Published version from PoS: PDF; External link: Proceedings of Science Server
In : KAON International Conference, Frascati, Italy, 21 - 25 May 2007, pp.e-page 008

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$|V_us|$ and $m_s$ from hadronic tau decays / Gamiz, Elvira (Illinois U., Urbana) ; Jamin, Matthias (ICREA, Barcelona ; Barcelona, IFAE) ; Pich, Antonio (Valencia U., IFIC) ; Prades, Joaquim (CERN) ; Schwab, Felix (Barcelona, IFAE)
Recent progress in the determination of |V_us| employing strange hadronic tau-decay data are reported. This includes using the recent OPAL update of the strange spectral function, as well as augmenting the dimension-two perturbative contribution with the recently calculated order alpha_s^3 term on the theory side. [...]
hep-ph/0612154; CERN-PH-TH-2006-254; UAB-FT-620; CERN-PH-TH-2006-254; UAB-FT-620.- Geneva : CERN, 2007 - 5 p. - Published in : Nucl. Phys. B, Proc. Suppl. 169 (2007) 85-89 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
In : 9th International Workshop on Tau Lepton Physics, Pisa, Italy, 19 - 22 Sep 2006, pp.85-89

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Measuring the a0-a2 pion scattering lengths through $K \to 3 \pi$ decays / Scimemi, Ignazio (Valencia U., IFIC) ; Gamiz, Elvira (Illinois U., Urbana) ; Prades, Joaquim (CERN)
We discuss the recent Cabibbo's proposal to measure the pion-pion scattering lengths combination a0-a2 from the cusp effect in the pi0-pi0 energy spectrum at threshold for K+ to (pi0 pi0 pi+) and KL to (pi0 pi0 pi0). We estimate the theoretical uncertainty of the a0-a2 determination at NLO in our approach and obtain that it is not smaller than 5% for K+ to (pi0 pi0 pi+). [...]
hep-ph/0610364; CERN-PH-TH-2006-219; IFIC-06-37; CERN-PH-TH-2006-219; IFIC-2006-37.- Geneva : CERN, 2007 - 4 p. - Published in : Nucl. Phys. B, Proc. Suppl. 174 (2007) 105-108 Fulltext: 0610364 - PDF; arXiv:hep-ph_0610364 - PDF; External link: Preprint
In : 13th International Conference on Quantum Chromodynamics, Montpellier, France, 3 - 7 Jul 2006, pp.105-108

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|V(us)| from strange hadronic tau data / Gamiz, Elvira (Illinois U., Urbana) ; Jamin, Matthias (ICREA, Barcelona ; Barcelona, IFAE) ; Pich, Antonio (Valencia U. ; Valencia U., IFIC) ; Prades, Joaquim (CERN) ; Schwab, Felix (Munich, Tech. U. ; Munich, Max Planck Inst.)
We report on recent work to determine the CKM matrix element |V_{us}| using strange hadronic \tau decay data. We use the recent OPAL update of the strange spectral function, while on the theory side we update the dimension-two perturbative contribution including the recently calculated \alpha_s^3 terms. [...]
hep-ph/0610246; CERN-PH-TH-2006-204; UAB-FT-614; CERN-PH-TH-2006-204; UAB-FT-614.- Geneva : CERN, 2007 - 7 p. - Published in : AIP Conf. Proc. C: 060726 (2006) , pp. 786-789
- Published in : , pp. 786-789 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
In : 33rd International Conference on High-Energy Physics, Moscow, Russian Federation, 26 Jul - 2 Aug 2006, pp.786-789

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