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- Peking UniversityCN860 papers
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22 papers · 2 filters
Statistical effect in the parton distribution functions of the nucleon
Yunhua Zhang, Lijing Shao, Bo-Qiang Ma
A new and simple statistical approach is performed to calculate the parton distribution functions (PDFs) of the nucleon in terms of light-front kinematic variables. We do not put i…
Simple Classification of Light Baryons
Yan Chen, Bo-Qiang Ma
We introduce a classification number which describes the baryon mass information in a fuzzy manner. According to and of baryons, we put all known light baryons in a s…
QCD corrections to at B Factories
Yan-Qing Ma, Yu-Jie Zhang, Kuang-Ta Chao
In heavy quarkonium production, the measured ratio at B factories is much larger than existing theoretical predictions. To clarify this…
PAMELA data and leptonically decaying dark matter
Peng-fei Yin, Qiang Yuan, Jia Liu +4
Recently PAMELA released their first results on the positron and antiproton ratios. Stimulated by the new data, we studied the cosmic ray propagation models and calculated the seco…
Revisiting the Vector and Axial-vector Vacuum Susceptibilities
Lei Chang, Yu-xin Liu, Wei-min Sun +1
We re-investigate the vector and axial-vector vacuum susceptibilities by taking advantage of the vector and axial-vector Ward-Takahashi identities. We show analytically that, in th…
Next-to-leading order QCD corrections to the top quark decay via model-independent FCNC couplings
Jia Jun Zhang, Chong Sheng Li, Jun Gao +4
D0 and CDF collaborations at the Fermilab Tevatron have searched for non-standard-model single top-quark production and set upper limits on the anomalous top quark flavor-changing…