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We compute the leptonic decay constants $f_{D^+}$, $f_{D_s}$, and $f_{K^+}$, and the quark-mass ratios $m_c/m_s$ and $m_s/m_l$ in unquenched lattice QCD using the experimentally determined value of $f_{\pi^+}$ for normalization. We use the…

We present a computation of the charm quark's mass and the leptonic D-meson decay constants f_D and f_{D_s} in two-flavour lattice QCD with non-perturbatively O(a) improved Wilson quarks. Our analysis is based on the CLS configurations at…

High Energy Physics - Lattice · Physics 2013-12-31 Jochen Heitger , Georg M. von Hippel , Stefan Schaefer , Francesco Virotta

We report a study describing the charm quark by a domain-wall fermion (DWF) in lattice quantum chromodynamics (QCD). Our study uses a quenched gauge ensemble with the DBW2 rectangle-improved gauge action at a lattice cutoff of $a^{-1} \sim…

High Energy Physics - Lattice · Physics 2009-09-29 Huey-Wen Lin , Shigemi Ohta , Amarjit Soni , Norikazu Yamada

We study heavy-heavy and heavy-light quark systems for charm with a relativistic heavy quark action in 2+1 flavor lattice QCD. Configurations are generated by the PACS-CS Collaboration at the lattice spacing is $a=0.09$ fm with the lattice…

Decay constants of pseudoscalar mesons $D$, $D_s$, $\eta_c$ and vector mesons $D^*$, $D_s^*$, $J/\psi$ are determined from $N_f=2+1$ lattice QCD at a lattice spacing $a\sim0.08$ fm. For vector mesons, the decay constants defined by tensor…

High Energy Physics - Lattice · Physics 2024-11-05 Donghao Li , Ying Chen , Ming Gong , Keh-Fei Liu , Zhaofeng Liu , Tingxiao Wang

We present the first lattice QCD calculation with realistic sea quark content of the D^+ meson decay constant f_{D^+}. We use the MILC Collaboration's publicly available ensembles of lattice gauge fields, which have a quark sea with two…

We investigate the charm quark system using the relativistic heavy quark action on 2+1 flavor PACS-CS configurations previously generated on $32^3 \times 64$ lattice. The dynamical up-down and strange quark masses are set to the physical…

High Energy Physics - Lattice · Physics 2013-05-29 Y. Namekawa , S. Aoki , K. -I. Ishikawa , N. Ishizuka , T. Izubuchi , K. Kanaya , Y. Kuramashi , M. Okawa , Y. Taniguchi , A. Ukawa , N. Ukita , T. Yoshié

We present the first systematic study of the radiative decays of charmed mesons using $2+1$-flavor clover fermion gauge ensembles generated by the CLQCD collaboration. One of the ensembles is at the physical pion mass, and one has a fine…

High Energy Physics - Lattice · Physics 2026-05-18 Wen-Zheng Hou , Nan Wang , Long-Cheng Gui , Jun Hua , Jian Liang , Jun Shi , Yu Meng

We present RBC/UKQCD's charm project using $N_f=2+1$ flavour ensembles with inverse lattice spacings in the range $1.73-2.77\,\mathrm{GeV}$ and two physical pion mass ensembles. Domain wall fermions are used for the light as well as the…

High Energy Physics - Lattice · Physics 2016-11-22 Peter Boyle , Luigi Del Debbio , Andreas Jüttner , Ava Khamseh , Francesco Sanfilippo , Justus Tobias Tsang , Oliver Witzel

We present the first study of the masses and decay constants of the pseudoscalar $ D $ mesons in two flavors lattice QCD with domain-wall fermion. The gauge ensembles are generated on the $24^3 \times 48 $ lattice with the extent $ N_s = 16…

High Energy Physics - Lattice · Physics 2014-07-31 Wen-Ping Chen , Yu-Chih Chen , Ting-Wai Chiu , Han-Yi Chou , Tian-Shin Guu , Tung-Han Hsieh

We determine the masses and pseudoscalar decay constants of D and D_s mesons employing lattice QCD with non-perturbatively O(a) improved Wilson quarks and a tree-level Symanzik-improved gauge action. Our analysis is based on the…

High Energy Physics - Lattice · Physics 2017-01-20 Sara Collins , Kevin Eckert , Jochen Heitger , Stefan Hofmann , Wolfgang Soeldner

We determine the ground state and first excited state masses of singly and doubly charmed spin 1/2 and 3/2 baryons with positive and negative parity. Configurations with $N_f=2+1$ non-perturbatively improved Wilson-clover fermions were…

High Energy Physics - Lattice · Physics 2015-08-14 Gunnar Bali , Sara Collins , Paula Pérez-Rubio

We compute decay constants of heavy-light mesons in quenched lattice QCD with a lattice spacing of a ~ 0.04 fm using non-perturbatively O(a) improved Wilson fermions and O(a) improved currents. We obtain f_{D_s} = 220(6)(5)(11) MeV, f_D =…

High Energy Physics - Lattice · Physics 2008-11-26 A. Ali Khan , V. Braun , T. Burch , M Göckeler , G. Lacagnina , A. Schäfer , G. Schierholz

We present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (N_f = 2+1+1) dynamical quarks using Wilson twisted mass fermions at maximal twist. The tuning of the strange and charm quark…

We present a determination of the decay constants of the $D$ and $D_s$ mesons from lattice QCD, each with a total error of about 2%, approximately a factor of three better than previous calculations. We have been able to achieve this…

High Energy Physics - Lattice · Physics 2011-06-15 Eduardo Follana

We present results for the leptonic decay constants of the D and D$_{\rm s}$ mesons from $N_{\rm f}=2+1$ lattice QCD. We employ a set of 49 high statistics gauge ensembles generated by the Coordinated Lattice Simulations (CLS) effort…

High Energy Physics - Lattice · Physics 2024-05-08 Simon Kuberski , Fabian Joswig , Sara Collins , Jochen Heitger , Wolfgang Söldner

We investigate the charm quark system on 2+1 flavor PACS-CS configurations. Calculations are performed at the lattice spacing $a^{-1}=2.194(10)$ GeV and the spatial extent $L=2.9$ fm with O(a)-improved Wilson fermions for the light quarks…

High Energy Physics - Lattice · Physics 2019-08-14 Y. Namekawa

We perform a high statistics study of the $J^{P}=0^{+}$ and $1^{+}$ charmed-strange mesons, $D_{s0}^*(2317)$ and $D_{s1}(2460)$, respectively. The effects of the nearby $DK$ and $D^{*}K$ thresholds are taken into account by employing the…

High Energy Physics - Lattice · Physics 2017-10-11 Gunnar S. Bali , Sara Collins , Antonio Cox , Andreas Schäfer

We present results for light meson masses and pseudoscalar decay constants from the first of a series of lattice calculations with 2+1 dynamical flavors of domain wall fermions and the Iwasaki gauge action. The work reported here was done…

We determine the leptonic decay constants in three flavor unquenched lattice QCD. We use O(a^2)-improved staggered light quarks and O(a)-improved charm quarks in the Fermilab heavy quark formalism. Our preliminary results, based upon an…

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