在质心能量4.13至4.70 GeV之间寻找e^+e^-湮灭中的氘核和反氘核产生
Search for the production of deuterons and antideuterons in e^+e^- annihilation at center-of-mass energies between 4.13 and 4.70 GeV
AI总结:
基于BESIII探测器19 fb$^{-1}$的$e^+e^-$碰撞数据,首次在4.13至4.70 GeV质心能量下寻找氘核与反氘核产生,未观察到显著信号,测得截面上限为9.0至145 fb。
摘要:
使用在BEPCII对撞机上的BESIII探测器收集的对应19 fb$^{-1}$积分亮度的$e^+e^-$碰撞数据样本,我们首次在4.13至4.70 GeV的质心能量下,通过$e^+e^-\ o ppπ^-\ar{d}+c.c.$过程寻找氘核和反氘核的产生。未观察到显著信号,在$90\%$置信水平下,$e^+e^-\ o ppπ^-\ar{d}+c.c.$的截面上限根据质心能量确定为9.0至145 fb。
英文摘要:
Using a data sample of $e^+e^-$ collision data corresponding to an integrated luminosity of 19 fb$^{-1}$ collected with the BESIII detector at the BEPCII collider, we search for the production of deuterons and antideuterons via $e^+e^-\to ppπ^-\bar{d}+c.c.$ for the first time at center-of-mass energies between 4.13 and 4.70 GeV. No significant signal is observed and the upper limit of the $e^+e^-\to ppπ^-\bar{d}+c.c.$ cross section is determined to be from 9.0 to 145 fb depending on the center-of-mass energy at the $90\%$ confidence level.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。