part of the mass difference between proton and neutron yields mQED=0.58卤0.16MeV. The result indicates that the inelastic contributions are small compared to the elastic ones.doi:10.1016/j.physletb.2021.136087J. GasserH. LeutwylerA. Rusetsky...
proton n. 1.质子 difference n. 1.[C,U]不同,差别,区别 2.[U]差额,差 3.[C]意见分歧,不和 neutron n.【物】 中子 MASS =Manual Analysis Scan System 人工分析扫描系统 Mass n. 1.【宗】弥撒[U][C] 2.(小写)弥撒曲[U][C] mass n. 1.[C][~ (of sth)]团,块,堆;大量,大批,...
The neutron-proton mass difference is re-evaluated on the basis of new experimental data and knowledge from high-energy electron scattering that the electromagnetic form factors of the proton can no longer be considered as identical. Calculations are performed using second order perturbation in e. ...
We discuss the Cottingham formula and evaluate the proton–neutron electromagnetic mass difference exploiting the state-of-the-art phenomenological input. We decompose individual contributions to the mass splitting into Born, inelastic and subtraction terms. We evaluate the subtraction-function contribution ...
doi:10.1016/0029-5582(60)90134-6A.R. BodmerElsevier B.V.Nuclear PhysicsBodmer, A R (1960), "Neutron and proton densities in nuclei and the semi-empirical mass formula," Nucl. Phys. 17 (0), 388-420.Bodmer, A. R. : Nucl. Phys. 17 (1960) 388....
The meaning of NEUTRON is an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus.
Moreover, with the mass difference between the proton and neutron approximated to zero, we note that the proton fraction x ≡ np/n can be solved from the equation $$\frac{\partial \epsilon (\bar{n},x)}{\partial x}+{\mu }_{e}(\bar{n},x)=0,$$ (8) where \({\mu }_...
(Extended Data Fig.5). Specifically, we assume independent EFT and many-body method errors and construct a normally distributed data likelihood encompassing the ground-state energy per nucleonE/Aand the point-proton radiusRpfor48Ca, and the energy\({E}_{{2}^{+}}\)of its first excited 2...
The Cottingham formula expresses the leading contribution of the electromagnetic interaction to the proton-neutron mass difference as an integral over the
nuclei with mass number 1 to 5proton-proton interactions/ proton+deuteron interactionsfew-nucleon systemsproton-proton correlationsneutron-neutron correlations/ A2140 Few-nucleon systems A1375C Nucleon-nucleon interactions, including antinucleon, deuteron, etc. (energy les 10 GeV) A1385 Hadron-induced...