Coupled channel approach to hyperonic interactions from lattice QCD

2013 ◽  
Vol 914 ◽  
pp. 231-237 ◽  
Author(s):  
Kenji Sasaki
Keyword(s):  
Lattice Qcd ◽  
Coupled Channel

scholarly journals Baryon interactions from lattice QCD with physical quark masses – Nuclear forces and ΞΞ forces –

2018 ◽  
Vol 175 ◽  
pp. 05009 ◽  
Author(s):  
Takumi Doi ◽  
Takumi Iritani ◽  
Sinya Aoki ◽  
Shinya Gongyo ◽  
Tetsuo Hatsuda ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Heavy Ion ◽  
Heavy Ion Collision ◽  
Nuclear Forces ◽  
Gauge Action ◽  
Quark Masses ◽  
Momentum Correlation ◽  
Coupled Channel ◽  
Ion Collision

We present the latest lattice QCD results for baryon interactions obtained at nearly physical quark masses. Nf = 2 + 1 nonperturbatively O(a)-improved Wilson quark action with stout smearing and Iwasaki gauge action are employed on the lattice of (96a)4 ≃(8.1fm)4 with a-1 ≃2.3 GeV, where mπ ≃146 MeV and mK ≃525 MeV. In this report, we study the two-nucleon systems and two-Ξ systems in 1S0 channel and 3S1-3D1 coupled channel, and extract central and tensor interactions by the HAL QCD method. We also present the results for the NΩ interaction in 5S2 channel which is relevant to the NΩ pair-momentum correlation in heavy-ion collision experiments.

scholarly journals Nπ scattering in the Roper channel

2018 ◽  
Vol 175 ◽  
pp. 05004
Author(s):  
M. Padmanath ◽  
C. B. Lang ◽  
Luka Leskovec ◽  
Sasa Prelovsek
Keyword(s):  
Lattice Qcd ◽  
Positive Parity ◽  
Roper Resonance ◽  
S Wave ◽  
Lattice Spectrum ◽  
Lattice Calculations ◽  
Channel Effects ◽  
Technical Details ◽  
Elastic Approximation ◽  
Coupled Channel

We present results from our recent lattice QCD study of Nπ scattering in the positive-parity nucleon channel, where the puzzling Roper resonance N*(1440) resides in experiment. Using a variety of hadron operators, that include qqq-like, Nπ in p-wave and Nσ in s-wave, we systematically extract the excited lattice spectrum in the nucleon channel up to 1.65 GeV. Our lattice results indicate that Nπ scattering in the elastic approximation alone does not describe a low-lying Roper. Coupled channel effects between Nπ and Nππ seem to be crucial to render a low-lying Roper in experiment, reinforcing the notion that this state could be a dynamically generated resonance. After giving a brief motivation for studying the Roper channel and the relevant technical details to this study, we will discuss the results and the conclusions based on our lattice investigation and in comparison with other lattice calculations.

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

2018 ◽  
Vol 175 ◽  
pp. 05013 ◽  
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.

scholarly journals Coupled channel analysis of theρmeson decay in lattice QCD

2011 ◽  
Vol 84 (5) ◽  
Author(s):  
C. B. Lang ◽  
Daniel Mohler ◽  
Sasa Prelovsek ◽  
Matija Vidmar
Keyword(s):  
Lattice Qcd ◽  
Channel Analysis ◽  
Coupled Channel

scholarly journals Lattice QCD studies on baryon interactions in the strangeness -2 sector with physical quark masses

2018 ◽  
Vol 175 ◽  
pp. 05010 ◽  
Author(s):  
Kenji Sasaki ◽  
Sinya Aoki ◽  
Takumi Doi ◽  
Shinya Gongyo ◽  
Tetsuo Hatsuda ◽  
...  
Keyword(s):  
Wave Function ◽  
Lattice Qcd ◽  
Lattice Volume ◽  
Quark Masses ◽  
H Dibaryon ◽  
Coupled Channel

We investigate baryon-baryon (BB) interactions in the strangeness S = −2 sector via the coupled-channel HAL QCD method which enables us to extract the scattering observables from Nambu-Bethe-Salpeter (NBS) wave function on the lattice. The simulations are performed with (almost) physical quark masses (mπ = 146MeV) and a huge lattice volume of La = 8.1fm. We discuss the fate of H-dibaryon state through the ΛΛ and NΞ coupled-channel scatterings

scholarly journals Coupled-channel approach to strangeness S = -2 baryon-bayron interactions in lattice QCD

2015 ◽  
Vol 2015 (11) ◽  
pp. 113B01-113B01 ◽  
Author(s):  
K. Sasaki ◽  
S. Aoki ◽  
T. Doi ◽  
T. Hatsuda ◽  
Y. Ikeda ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Coupled Channel

scholarly journals Coupled-channel Dπ, Dη and D s K ¯ $$ {D}_s\overline{K} $$ scattering from lattice QCD

2016 ◽  
Vol 2016 (10) ◽  
Author(s):  
Graham Moir ◽  
◽  
Michael Peardon ◽  
Sinéad M. Ryan ◽  
Christopher E. Thomas ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Coupled Channel
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