Systematic study of the experimental measurements on ratios of different Υ states
Systematic study of the experimental measurements on ratios of different Υ states
复制标题
DOI：
10.1103/physrevc.88.067901
复制
发表时间：
2013-08
影响因子：
3.1
通讯作者：
W. Zha;Chi Yang;Bingchu Huang;L. Ruan;Shuai Yang;Zebo Tang;Zhangbu Xu
中科院分区：
文献类型：
--
作者：
W. Zha;Chi Yang;Bingchu Huang;L. Ruan;Shuai Yang;Zebo Tang;Zhangbu Xu
The world data on yields and ratios of different $\ensuremath{\Upsilon}$ states created in hadron collisions at $\sqrt{s}=19\text{--}8000$ GeV are examined in a systematic way. We derive that the ratios of $\ensuremath{\Upsilon}(2S)/\ensuremath{\Upsilon}(1S)$ and $\ensuremath{\Upsilon}(3S)/\ensuremath{\Upsilon}(1S)$ are $0.290\ifmmode\pm\else\textpm\fi{}0.007(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}0.014(\mathrm{syst}.)$ and $0.131\ifmmode\pm\else\textpm\fi{}0.005(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}0.003(\mathrm{syst}.)$, respectively, for $p+p$ collisions at $\sqrt{s}=200$ GeV. A small energy dependence of these ratios is observed within the broad collision energies. In addition, the rapidity, transverse momentum, and transverse mass dependence of these ratios are also reported.
The world data on yields and ratios of different $\ensuremath{\Upsilon}$ states created in hadron collisions at $\sqrt{s}=19\text{--}8000$ GeV are examined in a systematic way. We derive that the ratios of $\ensuremath{\Upsilon}(2S)/\ensuremath{\Upsilon}(1S)$ and $\ensuremath{\Upsilon}(3S)/\ensuremath{\Upsilon}(1S)$ are $0.290\ifmmode\pm\else\textpm\fi{}0.007(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}0.014(\mathrm{syst}.)$ and $0.131\ifmmode\pm\else\textpm\fi{}0.005(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}0.003(\mathrm{syst}.)$, respectively, for $p+p$ collisions at $\sqrt{s}=200$ GeV. A small energy dependence of these ratios is observed within the broad collision energies. In addition, the rapidity, transverse momentum, and transverse mass dependence of these ratios are also reported.