arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1803.07902nucl-th
收藏

具有玻色-爱因斯坦凝聚的π介子发射源的多π Hanbury-Brown-Twiss关联分析

Analyses of multi-pion Hanbury-Brown-Twiss correlations for the pion-emitting sources with Bose-Einstein condensation

Ghulam Bary, Peng Ru, Wei-Ning Zhang

摘要:

在演化的玻色-爱因斯坦凝聚π介子气体(EPG)模型中计算了全同π介子的三粒子和四粒子关联。分析了EPG模型中不同动量间隔下的多π关联函数,并与$\sqrt{s_{NN}}=2.76$ TeV的Pb-Pb碰撞实验数据进行了比较.发现在三π和四π的低平均横动量区间内,多π关联函数和累积关联函数对EPG源的凝聚分数敏感。多π关联的模型计算结果与实验数据有很好的一致性,得到的源凝结分数在16~--~ 47%之间。

英文摘要:

We calculate the three- and four-particle correlations of identical pions in an evolving pion gas (EPG) model with Bose-Einstein condensation. The multi-pion correlation functions in the EPG model are analyzed in different momentum intervals and compared with the experimental data for Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV. It is found that the multi-pion correlation functions and cumulant correlation functions are sensitive to the condensation fraction of the EPG sources in the low average transverse-momentum intervals of the three and four pions. The model results of the multi-pion correlations are consistent with the experimental data in a considerable degree, which gives a source condensation fraction between 16~--~47\%.

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。

↑