Charm quark system on the physical point in 2+1 flavor lattice QCD

In this study, the bound state energy of a four-quark system was analytically calculated as a two heavy–heavy anti-quarks [Formula: see text] and two light–light quarks [Formula: see text]. Tetraquark was assumed to be a bound state of two-body system consisting of two mesons, each containing a light quark and a heavy antiquark. Due to the presence of heavy mesons in the tetraquark, Born–Oppenheimer approximation was used to study its bound states. To assess the bounding energy, Schrödinger equation was solved using lattice QCD [Formula: see text] potential, having expanded the tetraquark potential [Formula: see text] up to 11th term. Binding energy state and wave function, however, were obtained in the scalar [Formula: see text] channel. Graphical results for wave functions obtained versus antiquark–antiquark distance [Formula: see text] confirmed the existence of the tetraquark [Formula: see text]. Analytical bound state energy obtained here was in good agreement with several numerical ones published in the literature, confirming the accuracy of the approach taken here.

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Neutral B -meson mixing from full lattice QCD at the physical point

Physical Review D ◽

10.1103/physrevd.100.094508 ◽

2019 ◽

Vol 100 (9) ◽

Cited By ~ 15

Author(s):

R. J. Dowdall ◽

C. T. H. Davies ◽

R. R. Horgan ◽

G. P. Lepage ◽

C. J. Monahan ◽

...

Keyword(s):

Lattice Qcd ◽

B Meson ◽

Physical Point ◽

Neutral B Meson ◽

Meson Mixing ◽

B Meson Mixing

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Charmed baryon spectrum from lattice QCD near the physical point

Physical Review D ◽

10.1103/physrevd.102.054513 ◽

2020 ◽

Vol 102 (5) ◽

Cited By ~ 2

Author(s):

H. Bahtiyar ◽

K. U. Can ◽

G. Erkol ◽

P. Gubler ◽

M. Oka ◽

...

Keyword(s):

Lattice Qcd ◽

Physical Point ◽

Charmed Baryon ◽

Baryon Spectrum

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The strange and charm quark contributions to the anomalous magnetic moment of the muon from lattice QCD

Nuclear and Particle Physics Proceedings ◽

10.1016/j.nuclphysbps.2015.09.266 ◽

2016 ◽

Vol 273-275 ◽

pp. 1645-1649

Author(s):

Jonna Koponen ◽

Bipasha Chakraborty ◽

Christine T.H. Davies ◽

Gordon Donald ◽

Rachel Dowdall ◽

...

Keyword(s):

Lattice Qcd ◽

Magnetic Moment ◽

Anomalous Magnetic Moment ◽

Charm Quark

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Charm sea effects on charmonium decay constants and heavy meson masses

The European Physical Journal C ◽

10.1140/epjc/s10052-021-09520-y ◽

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.

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Baryon interactions from lattice QCD with physical masses —S = −3 sector: Ξ∑ and Ξ∑-Λ∑—

EPJ Web of Conferences ◽

10.1051/epjconf/201817505013 ◽

2018 ◽

Vol 175 ◽

pp. 05013 ◽

Cited By ~ 3

Author(s):

Noriyoshi Ishii ◽

Sinya Aoki ◽

Takumi Doi ◽

Shinya Gongyo ◽

Tetsuo Hatsuda ◽

...

Keyword(s):

Lattice Qcd ◽

Single Channel ◽

Wave Functions ◽

Large Uncertainty ◽

Physical Point ◽

Direct Scattering ◽

Spatial Volume ◽

Hypernuclear Physics ◽

Coupled Channel

Hyperon-nucleon and hyperon-hyperon interactions are important in studying the properties of hypernuclei in hypernuclear physics. However, unlike the nucleons which are quite stable, hyperons are unstable so that the direct scattering experiments are difficult, which leads to the large uncertainty in the phenomenological determination of hyperon potentials. In this talk, we use the gauge configurations generated at the (almost) physical point (mπ = 146 MeV) on a huge spatial volume (8:1fm)4 to present our latest result on the hyperon-hyperon potentials in S = −3 sector (Ξ∑ single channel and Ξ∑- ΞΛ; coupled channel) from the Nambu-Bethe-Salpeter wave functions based on the HAL QCD method with improved statistics.

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