scholarly journals Cross-channel study of pion scattering from lattice QCD

2019 ◽  
Vol 100 (11) ◽  
Author(s):  
M. Mai ◽  
C. Culver ◽  
A. Alexandru ◽  
M. Döring ◽  
F. X. Lee
Keyword(s):  
Lattice Qcd ◽  
Pion Scattering

scholarly journals Elastic I=3/2 p -wave nucleon-pion scattering amplitude and the Δ(1232) resonance from Nf=2+1 lattice QCD

2018 ◽  
Vol 97 (1) ◽  
Author(s):  
Christian Walther Andersen ◽  
John Bulava ◽  
Ben Hörz ◽  
Colin Morningstar
Keyword(s):  
Lattice Qcd ◽  
Scattering Amplitude ◽  
P Wave ◽  
Pion Scattering

scholarly journals Lattice QCD calculation of full pion scattering lengths

1993 ◽  
Vol 71 (15) ◽  
pp. 2387-2390 ◽  
Author(s):  
Y. Kuramashi ◽  
M. Fukugita ◽  
H. Mino ◽  
M. Okawa ◽  
A. Ukawa
Keyword(s):  
Lattice Qcd ◽  
Pion Scattering ◽  
Scattering Lengths

scholarly journals Light meson form factors at high Q2 from lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 06015 ◽  
Author(s):  
Jonna Koponen ◽  
André Zimermmane-Santos ◽  
Christine Davies ◽  
G. Peter Lepage ◽  
Andrew Lytle
Keyword(s):  
Lattice Qcd ◽  
Theoretical Calculations ◽  
Light Quark ◽  
Form Factors ◽  
Hadron Structure ◽  
Strange Quarks ◽  
Pion Scattering ◽  
Quark Masses ◽  
Systematic Uncertainties ◽  
Atomic Electrons

Measurements and theoretical calculations of meson form factors are essential for our understanding of internal hadron structure and QCD, the dynamics that bind the quarks in hadrons. The pion electromagnetic form factor has been measured at small space-like momentum transfer |q2| < 0.3 GeV2 by pion scattering from atomic electrons and at values up to 2.5 GeV2 by scattering electrons from the pion cloud around a proton. On the other hand, in the limit of very large (or infinite) Q2 = −q2, perturbation theory is applicable. This leaves a gap in the intermediate Q2 where the form factors are not known. As a part of their 12 GeV upgrade Jefferson Lab will measure pion and kaon form factors in this intermediate region, up to Q2 of 6 GeV2. This is then an ideal opportunity for lattice QCD to make an accurate prediction ahead of the experimental results. Lattice QCD provides a from-first-principles approach to calculate form factors, and the challenge here is to control the statistical and systematic uncertainties as errors grow when going to higher Q2 values. Here we report on a calculation that tests the method using an ηs meson, a ’heavy pion’ made of strange quarks, and also present preliminary results for kaon and pion form factors. We use the nf = 2 + 1 + 1 ensembles made by the MILC collaboration and Highly Improved Staggered Quarks, which allows us to obtain high statistics. The HISQ action is also designed to have small dicretisation errors. Using several light quark masses and lattice spacings allows us to control the chiral and continuum extrapolation and keep systematic errors in check.

scholarly journals The I = 1 pion–pion scattering amplitude and timelike pion form factor from Nf = 2 + 1 lattice QCD

2019 ◽  
Vol 939 ◽  
pp. 145-173 ◽  
Author(s):  
Christian Andersen ◽  
John Bulava ◽  
Ben Hörz ◽  
Colin Morningstar
Keyword(s):  
Form Factor ◽  
Lattice Qcd ◽  
Scattering Amplitude ◽  
Pion Form Factor ◽  
Pion Scattering

scholarly journals Pion-pion scattering and the timelike pion form factor from $N_f=2+1$ lattice QCD simulations using the stochastic LapH method

2016 ◽  
Author(s):  
John Bulava ◽  
Ben Hörz ◽  
Brendan Fahy ◽  
Keisuke Jimmy Juge ◽  
Colin Morningstar ◽  
...  
Keyword(s):  
Form Factor ◽  
Lattice Qcd ◽  
Pion Form Factor ◽  
Pion Scattering ◽  
Stochastic Laph

scholarly journals P -wave nucleon-pion scattering amplitude in the Δ(1232) channel from lattice QCD

2021 ◽  
Vol 103 (9) ◽  
Author(s):  
Giorgio Silvi ◽  
Srijit Paul ◽  
Constantia Alexandrou ◽  
Stefan Krieg ◽  
Luka Leskovec ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Scattering Amplitude ◽  
P Wave ◽  
Pion Scattering

scholarly journals I=3 Three-Pion Scattering Amplitude from Lattice QCD

2020 ◽  
Vol 124 (3) ◽  
Author(s):  
Tyler D. Blanton ◽  
Fernando Romero-López ◽  
Stephen R. Sharpe
Keyword(s):  
Lattice Qcd ◽  
Scattering Amplitude ◽  
Pion Scattering
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