scholarly journals Precise heavy-light meson masses and hyperfine splittings from lattice QCD including charm quarks in the sea

2012 ◽  
Vol 86 (9) ◽  
Author(s):  
R. J. Dowdall ◽  
C. T. H. Davies ◽  
T. C. Hammant ◽  
R. R. Horgan
Keyword(s):  
Lattice Qcd ◽  
Light Meson ◽  
Charm Quarks ◽  
Hyperfine Splittings

scholarly journals Light-meson leptonic decay rates in lattice QCD+QED

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
M. Di Carlo ◽  
G. Martinelli ◽  
D. Giusti ◽  
V. Lubicz ◽  
C. T. Sachrajda ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Leptonic Decay ◽  
Decay Rates ◽  
Light Meson

scholarly journals Heavy light tetraquarks from Lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 05014 ◽  
Author(s):  
Parikshit Junnarkar ◽  
M Padmanath ◽  
Nilmani Mathur
Keyword(s):  
Lattice Qcd ◽  
Lattice Spacing ◽  
Energy Levels ◽  
Clear Indication ◽  
Lattice Calculation ◽  
Charm Quarks ◽  
Preliminary Results ◽  
Scattering State

We present preliminary results from a lattice calculation of tetraquark states in the charm and bottom sector of the type udbb, usbb, udcc and scbb. These calculations are performed on Nf = 2 + 1 + 1 MILC ensembles with lattice spacing of a = 0:12 fm and a = 0:06 fm. A relativistic action with overlap fermions is employed for the light and charm quarks while a non-relativistic action with non-perturbatively improved coefficients is used in the bottom sector. Preliminary results provide a clear indication of presence of energy levels below the relevant thresholds of different tetraquark states in the double bottom sector while a scattering state is observed in the charm sector.

scholarly journals The Upsilon spectrum and the determination of the lattice spacing from lattice QCD including charm quarks in the sea

2012 ◽  
Vol 85 (5) ◽  
Author(s):  
R. J. Dowdall ◽  
B. Colquhoun ◽  
J. O. Daldrop ◽  
C. T. H. Davies ◽  
I. D. Kendall ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Lattice Spacing ◽  
Charm Quarks

scholarly journals The static-light meson spectrum from twisted mass lattice QCD

2008 ◽  
Vol 2008 (12) ◽  
pp. 058-058 ◽  
Author(s):  
Karl Jansen ◽  
Chris Michael ◽  
Andrea Shindler ◽  
Marc Wagner
Keyword(s):  
Lattice Qcd ◽  
Light Meson ◽  
Meson Spectrum ◽  
Twisted Mass

scholarly journals Charm sea effects on charmonium decay constants and heavy meson masses

2021 ◽  
Vol 81 (8) ◽  
Author(s):  
Salvatore Calì ◽  
Kevin Eckert ◽  
Jochen Heitger ◽  
Francesco Knechtli ◽  
Tomasz Korzec
Keyword(s):  
Lattice Qcd ◽  
Continuum Limit ◽  
Charm Quark ◽  
Heavy Meson ◽  
Charm Quarks ◽  
Decay Constants ◽  
Derivatives Of ◽  
Charm Mass ◽  
The Continuum

AbstractWe estimate the effects on the decay constants of charmonium and on heavy meson masses due to the charm quark in the sea. Our goal is to understand whether for these quantities $${N_\mathrm{f}}=2+1$$ N f = 2 + 1 lattice QCD simulations provide results that can be compared with experiments or whether $${N_\mathrm{f}}=2+1+1$$ N f = 2 + 1 + 1 QCD including the charm quark in the sea needs to be simulated. We consider two theories, $${N_\mathrm{f}}=0$$ N f = 0 QCD and QCD with $${N_\mathrm{f}}=2$$ N f = 2 charm quarks in the sea. The charm sea effects (due to two charm quarks) are estimated comparing the results obtained in these two theories, after matching them and taking the continuum limit. The absence of light quarks allows us to simulate the $${N_\mathrm{f}}=2$$ N f = 2 theory at lattice spacings down to 0.023 fm that are crucial for reliable continuum extrapolations. We find that sea charm quark effects are below 1% for the decay constants of charmonium. Our results show that decoupling of charm works well up to energies of about 500 MeV. We also compute the derivatives of the decay constants and meson masses with respect to the charm mass. For these quantities we again do not see a significant dynamical charm quark effect, albeit with a lower precision. For mesons made of a charm quark and a heavy antiquark, whose mass is twice that of the charm quark, sea effects are only about 1‰ in the ratio of vector to pseudoscalar masses.

scholarly journals The B(s) → D(s)lv Decay with Highly Improved Staggered Quarks and NRQCD

2018 ◽  
Vol 175 ◽  
pp. 13001
Author(s):  
Euan McLean ◽  
Christine Davies ◽  
Brian Colquhoun ◽  
Andrew Lytle
Keyword(s):  
Lattice Qcd ◽  
Second Generation ◽  
Form Factors ◽  
Charm Quarks

We report on progress of a lattice QCD calculation of the B → Dlv and Bs → Dslv semileptonic form factors. We use a relativistic staggered action (HISQ) for light and charm quarks, and an improved non-relativistic (NRQCD) action for bottom, on the second generation MILC ensembles.

scholarly journals Light meson physics from maximally twisted mass lattice QCD

2010 ◽  
Vol 2010 (8) ◽  
Author(s):  
Remi Baron ◽  
◽  
Phillip Boucaud ◽  
Petros Dimopoulos ◽  
Roberto Frezzotti ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Light Meson ◽  
Twisted Mass

scholarly journals Heavy-light meson in anisotropic lattice QCD

2003 ◽  
Vol 119 ◽  
pp. 601-603 ◽  
Author(s):  
H. Matsufuru ◽  
J. Harada ◽  
T. Onogia ◽  
A. Sugita
Keyword(s):  
Lattice Qcd ◽  
Light Meson ◽  
Anisotropic Lattice

scholarly journals D meson semileptonic form factors in Nf = 3 QCD with Möbius domain-wall quarks

2018 ◽  
Vol 175 ◽  
pp. 13007 ◽  
Author(s):  
Takashi Kaneko ◽  
Brian Colquhoun ◽  
Hidenori Fukaya ◽  
Shoji Hashimoto
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Momentum Transfer ◽  
Lattice Spacing ◽  
Light Quark ◽  
D Meson ◽  
Form Factors ◽  
Scalar Form ◽  
Charm Quarks ◽  
Quark Masses

e present our calculation of D → π and D → K semileptonic form factors in Nf = 2 + 1 lattice QCD. We simulate three lattice cutoffs a-1 ≃ 2.5, 3.6 and 4.5 GeV with pion masses as low as 230 MeV. The Möbius domain-wall action is employed for both light and charm quarks. We present our results for the vector and scalar form factors and discuss their dependence on the lattice spacing, light quark masses and momentum transfer.

scholarly journals Excited light meson spectroscopy from lattice QCD

2012 ◽  
Author(s):  
Christopher E. Thomas ◽  
Hadron Spectrum Collaboration
Keyword(s):  
Lattice Qcd ◽  
Light Meson ◽  
Meson Spectroscopy
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