Weak neutral current axial form factor using $$ \left(\overline{\nu}\right)\nu $$-nucleon scattering and lattice QCD inputs
Weak neutral current axial form factor using $$ \left(\overline{\nu}\right)\nu $$-nucleon scattering and lattice QCD inputs
复制标题
使用 $$ left(overline{ u} ight) u $$-核子散射和晶格 QCD 输入的弱中性电流轴向形状因子
DOI:
10.1007/jhep01(2020)136
复制
发表时间:
2018
影响因子:
5.4
通讯作者:
D. Richards
中科院分区:
文献类型:
--
作者:
R. Sufian;Keh;D. Richards
We present a determination of the neutral current weak axial charge $G^Z_A(0)=-0.654(3)_{\rm stat}(5)_{\rm sys}$ using the strange quark axial charge $G^s_A(0)$ calculated with lattice QCD. We then perform a phenomenological analysis, where we combine the strange quark electromagnetic form factor from lattice QCD with (anti)neutrino-nucleon scattering differential cross section from MiniBooNE experiments in a momentum transfer region $0.24\lesssim Q^2 \lesssim 0.71$ GeV$^2$ to determine the neutral current weak axial form factor $G^Z_A(Q^2)$ in the range of $0\lesssim Q^2\leq 1$ GeV$^2$. This yields a phenomenological value of $G^Z_A(0)=-0.687(89)_{\rm stat}(40)_{\rm sys}$. The value of $G^Z_A(0)$ constrained by the lattice QCD calculation of $G^s_A(0)$, when compared to its phenomenological determination, provides a significant improvement in precision and accuracy and can be used to provide a constraint on the fit to $G^Z_A(Q^2)$ for $Q^2>0$. This constrained fit leads to an unambiguous determination of (anti)neutrino-nucleon neutral current elastic scattering differential cross section near $Q^2=0$ and can play an important role in numerically isolating nuclear effects in this region. We show a consistent description of $G^Z_A(Q^2)$ obtained from the (anti)neutrino-nucleon scattering cross section data requires a nonzero contribution of the strange quark electromagnetic form factor. We demonstrate the robustness of our analysis by providing a post-diction of the BNL E734 experimental data.
影响因子:
8.6
作者:
P. Adamson;C. Andreopoulos;R. Armstrong;D. Auty;D. Ayres;C. Backhouse;G. Barr;M. Bishai;A. B
通讯作者:
P. Adamson;C. Andreopoulos;R. Armstrong;D. Auty;D. Ayres;C. Backhouse;G. Barr;M. Bishai;A. B
影响因子:
5
作者:
Alexandrou, C.;Bacchio, S.;Koutsou, G.
通讯作者:
Koutsou, G.
DOI:
10.1140/epja/i2019-12916-x
发表时间:
2019
期刊:
The European Physical Journal A
影响因子:
--
作者:
Kronfeld, Andreas S.;Richards, David G.;Detmold, William;Gupta, Rajan;Lin, Huey-Wen;Liu, Keh-Fei;Meyer, Aaron S.;Sufian, Raza;Syritsyn, Sergey
通讯作者:
Syritsyn, Sergey