Lattice QCD calculation of the pion charge radius using a model-independent method
| العنوان: | Lattice QCD calculation of the pion charge radius using a model-independent method |
|---|---|
| المؤلفون: | Luchang Jin, Yang Fu, Xu Feng |
| المصدر: | Physical Review |
| بيانات النشر: | APS, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Quark, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Lattice, Hadron, High Energy Physics - Lattice (hep-lat), High Energy Physics::Phenomenology, Propagator, FOS: Physical sciences, Lattice QCD, Gauge (firearms), 01 natural sciences, Computer Science::Digital Libraries, High Energy Physics - Experiment, Momentum, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, Pion, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Lattice, Charge radius, 0103 physical sciences, 010306 general physics |
| الوصف: | We use a method to calculate the hadron's charge radius without model-dependent momentum extrapolations. The method does not require the additional quark propagator inversions on the twisted boundary conditions or the computation of the momentum derivatives of quark propagators and thus is easy to implement. We apply this method to the calculation of pion charge radius $\langle r_\pi^2\rangle$. For comparison, we also determine $\langle r_\pi^2\rangle$ with the traditional approach of computing the slope of the form factors. The new method produces results consistent with those from the traditional method and with statistical errors 1.5-1.9 times smaller. For the four gauge ensembles at the physical pion masses, the statistical errors of $\langle r_\pi^2\rangle$ range from 2.1% to 4.6% by using $\lesssim50$ configurations. For the ensemble at $m_\pi\approx 340$ MeV, the statistical uncertainty is even reduced to a sub-percent level. Comment: 5 pages, 2 figures; v2, reference updated, we thank C. C. Chang for the useful information; v3, accepted for publication as PRD Rapid Communication |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95c85b53d22ef65110a90ca781a79567 http://repo.scoap3.org/api |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....95c85b53d22ef65110a90ca781a79567 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |