scholarly journals Lattice QCD calculation of theρmeson decay width

2007 ◽  
Vol 76 (9) ◽  
Author(s):  
S. Aoki ◽  
M. Fukugita ◽  
K-I. Ishikawa ◽  
N. Ishizuka ◽  
K. Kanaya ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Decay Width

scholarly journals Kπscattering and theK*decay width from lattice QCD

2013 ◽  
Vol 88 (5) ◽  
Author(s):  
Sasa Prelovsek ◽  
Luka Leskovec ◽  
C. B. Lang ◽  
Daniel Mohler
Keyword(s):  
Lattice Qcd ◽  
Decay Width

scholarly journals Lattice calaulation of χc0→ 2γ decay width

2022 ◽  
Author(s):  
Zuoheng Zou ◽  
Yu Meng ◽  
Chuan 刘川 Liu
Keyword(s):  
Lattice Qcd ◽  
Decay Width ◽  
High Energy Physics ◽  
Form Factors ◽  
Statistical Error ◽  
High Energy ◽  
Creative Commons ◽  
Modern Physics ◽  
Gamma Decay ◽  
Academy Of Sciences

Abstract We perform a lattice QCD calculation of the $\chi_{c0} \rightarrow 2\gamma$ decay width using a model-independent method which does not require a momentum extrapolation of the corresponding off-shell form factors. The simulation is performed on ensembles of $N_f=2$ twisted mass lattice QCD gauge configurations with three different lattice spacings. After a continuum extrapolation, the decay width is obtained to be $\Gamma_{\gamma\gamma}(\chi_{c0})=3.65(83)_{\mathrm{stat}}(21)_{\mathrm{lat.syst}}(66)_{\mathrm{syst}}\, \textrm{keV}$. Albeit this large statistical error, our result is compatible with the experimental results within 1.3$\sigma$. Potential improvements of the lattice calculation in the future are also discussed. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

scholarly journals πγ→ππ transition and the ρ radiative decay width from lattice QCD

2018 ◽  
Vol 98 (7) ◽  
Author(s):  
Constantia Alexandrou ◽  
Luka Leskovec ◽  
Stefan Meinel ◽  
John Negele ◽  
Srijit Paul ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Decay Width ◽  
Radiative Decay

scholarly journals Calculating the $\rho$ radiative decay width with lattice QCD

2019 ◽  
Author(s):  
Luka Leskovec ◽  
Constantia Alexandrou ◽  
John Negele ◽  
Stefan Meinel ◽  
Srijit Paul ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Decay Width ◽  
Radiative Decay

scholarly journals Tetraquark resonances computed with static lattice QCD potentials and scattering theory

2018 ◽  
Vol 175 ◽  
pp. 05017
Author(s):  
Pedro Bicudo ◽  
Marco Cardoso ◽  
Antje Peters ◽  
Martin Pflaumer ◽  
Marc Wagner
Keyword(s):  
Lattice Qcd ◽  
Decay Width ◽  
Scattering Theory ◽  
Wave Method ◽  
Proof Of Concept ◽  
Angular Momenta ◽  
Quantum Numbers ◽  
Oppenheimer Approximation ◽  
T Matrix ◽  
Static Lattice

We study tetraquark resonances with lattice QCD potentials computed for two static quarks and two dynamical quarks, the Born-Oppenheimer approximation and the emergent wave method of scattering theory. As a proof of concept we focus on systems with isospin I = 0, but consider different relative angular momenta l of the heavy b quarks. We compute the phase shifts and search for S and T matrix poles in the second Riemann sheet. We predict a new tetraquark resonance for l = 1, decaying into two B mesons, with quantum numbers I(JP) = 0(1−), mass [see formula in PDF] MeV and decay width [see formula in PDF] MeV.

scholarly journals Erratum: πγ→ππ transition and the ρ radiative decay width from lattice QCD [Phys. Rev. D 98 , 074502 (2018)]

2022 ◽  
Vol 105 (1) ◽  
Author(s):  
Constantia Alexandrou ◽  
Luka Leskovec ◽  
Stefan Meinel ◽  
John Negele ◽  
Srijit Paul ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Decay Width ◽  
Radiative Decay

scholarly journals The rho radiative decay width from lattice QCD

2020 ◽  
Author(s):  
Marcus Petschlies ◽  
Constantia Alexandrou ◽  
Luka Leskovec ◽  
Stefan Meinel ◽  
Gumaro Rendon ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Decay Width ◽  
Radiative Decay

scholarly journals The $$\pi f_0(500)$$ decay of the $$a_1(1260)$$

2021 ◽  
Vol 81 (9) ◽  
Author(s):  
R. Molina ◽  
M. Döring ◽  
W. H. Liang ◽  
E. Oset
Keyword(s):  
Lattice Qcd ◽  
Decay Width ◽  
Scalar Meson ◽  
Axial Vector ◽  
Experimental Results ◽  
Partial Decay Width ◽  
Vector Interaction

AbstractWe evaluate the $$a_1(1260) \rightarrow \pi \sigma (f_0(500))$$ a 1 ( 1260 ) → π σ ( f 0 ( 500 ) ) decay width from the perspective that the $$a_1(1260)$$ a 1 ( 1260 ) resonance is dynamically generated from the pseudoscalar–vector interaction and the $$\sigma $$ σ arises from the pseudoscalar–pseudoscalar interaction. A triangle mechanism with $$a_1(1260) \rightarrow \rho \pi $$ a 1 ( 1260 ) → ρ π followed by $$\rho \rightarrow \pi \pi $$ ρ → π π and a fusion of two pions within the loop to produce the $$\sigma $$ σ provides the mechanism for this decay under these assumptions for the nature of the two resonances. We obtain widths of the order of 13–22 MeV. Present experimental results differ substantially from each other, suggesting that extra efforts should be devoted to the precise extraction of this important partial decay width, which should provide valuable information on the nature of the axial vector and scalar meson resonances and help clarify the role of the $$\pi \sigma $$ π σ channel in recent lattice QCD calculations of the $$a_1$$ a 1 .

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