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

Christian Walther Andersen; John Bulava; Ben H?rz; Colin Morningstar

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

机译：弹性I = 3/2 p波核聚振子散射幅度和δ（1232）来自N_F = 2 + 1格QCD的Δ（1232）

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摘要

We present the first direct determination of meson-baryon resonance parameters from a scattering amplitude calculated using lattice QCD. In particular, we calculate the elastic I = 3/2, p-wave nucleonpion amplitude on a single ensemble of N_f = 2 + 1 Wilson-clover fermions with m_π = 280 MeV and m_K = 460 MeV. At these quark masses, the Δ(1232) resonance pole is found close to the N ? π threshold and a Breit-Wigner fit to the amplitude gives g_(ΔNπ)~(BW) = 19.0(4.7) in agreement with phenomenological determinations.

机译：我们介绍了使用格子QCD计算的散射幅度的Meson-Baryon共振参数的第一次直接确定。特别地，我们计算N_F = 2 + 1 Wilson-Clovers的单个集合上的弹性I = 3/2，P波核电幅度，使用M_π= 280meV和M_K = 460MeV。在这些夸克质量肿块中，δ（1232）谐振杆被发现靠近n？ π阈值和拟合幅度的Breit-Wigner在与现象学决定一致中给出G_（Δnπ）〜（bw）= 19.0（4.7）。

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《Physical review, D》 |2018年第1期|共7页
作者
Christian Walther Andersen; John Bulava; Ben H?rz; Colin Morningstar;
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作者单位

Department of Mathematics and Computer Science and CP3-Origins University of Southern Denmark Campusvej 55 5230 Odense M Denmark;

Department of Mathematics and Computer Science and CP3-Origins University of Southern Denmark Campusvej 55 5230 Odense M Denmark;

PRISMA Cluster of Excellence and Institut für Kernphysik University of Mainz Johann-Joachim-Becher-Weg 45 55099 Mainz Germany;

Department of Physics Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA;

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正文语种 eng
中图分类粒子物理学;场论;
关键词
nucleon-pion; scattering; amplitude;

机译：核心π;散射;幅度;

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1. Elastic I =3/2 p-wave nucleon-pion scattering amplitude and the Δ(1232) resonance from N_f = 2 + 1 lattice QCD [J] . Christian Walther Andersen, John Bulava, Ben H?rz, Physical review, D . 2018,第1期

机译：弹性I = 3/2 p波核聚振子散射幅度和δ（1232）来自N_F = 2 + 1格QCD的Δ（1232）
2. P-wave nucleon-pion scattering amplitude in the Δ(1232) channel from lattice QCD [J] . Giorgio Silvi, Srijit Paul, Constantia Alexandrou, Physical review, D . 2021,第9期

机译：δ（1232）频道中的p波核孔散射幅度从格子qcd
3. Determination of s- and p-wave I=1/2 K pi scattering amplitudes in N-f=2+1 lattice QCD [J] . Brett Ruairi, Bulava John, Fallica Jacob, Nuclear physics, B . 2018,第期

机译：在N-F = 2 + 1格QCD中测定S-和P波I = 1/2K PI散射幅度
4. Phases of QCD from Small to Large N_f:(Some) Lattice Results [C] . A. Deuzeman, E. Pallante, M. P. Lombardo International Workshop on Perspectives of Strong Coupling Gauge Theories . 2011

机译：QCD的阶段从小到大n_f :(有些）格子结果
5. Elastic scattering of pions from tritium and helium-3 in the backward hemisphere, in the region of the Delta(33)(1232) resonance. [D] . Matthews, Scott K. 1993

机译：在Delta（33）（1232）共振区域中后向半球中p和氦3中的离子的弹性散射。
6. Multiple scattering dynamics of fermions at an isolated p-wave resonance [O] . R. Thomas, K. O. Roberts, E. Tiesinga, -1

机译：费米子在孤立p波共振下的多重散射动力学
7. The elastic $I=3/2$ $p$-wave nucleon-pion scattering amplitude and the $\Delta(1232)$ resonance from $N_{\mathrm{f}}=2+1$ lattice QCD [O] . Andersen, Christian Walther, Bulava, John, Hörz, Ben, 2017

机译：弹性的$ I = 3/2 $ $ p $ -wave核子 - 离子散射振幅和 $ \ Delta（1232）$ $ $ _ {\ mathrm {f}} = 2 + 1 $格子QCD

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

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