arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节（Veterans Day），12 日无更新
arXiv 2604.00367hep-ph
收藏

重味衰变产生的重子对相关性

Dilepton Correlations from Heavy Flavor Decays

DXC Technology（DXC科技）；Technical University Munich（慕尼黑工业大学）；Lawrence Livermore National Laboratory（劳伦斯利弗莫尔国家实验室）；University of California, Davis（加州大学戴维斯分校）

T. Dahms, R. Vogt

备注：
12 pages, 6 figures
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

AI总结：

研究重味衰变产生的低质量轻子对的相关性，利用HVQMNR代码计算，发现信号随电子对横向动量变化而变化，底子衰变贡献主导，且信号对k_T广度敏感性较低。

摘要：

研究重味衰变产生的轻子对相关性，利用HVQMNR代码计算，发现信号随电子对横向动量变化而变化，底子衰变贡献主导，且信号对k_T广度敏感性较低。

英文摘要：

Background: Azimuthal correlations between heavy flavor hadrons have been previously studied in $p+p$ collisions (Phys. Rev. C {\bf 98}, 034907 (2018), {\bf 101}, 034910 (2020)). These studies found good agreement with the data and provide a baseline for further studies in $p+A$ and $A+A$ collisions. Purpose: This work extends those studies to heavy flavor hadron decays to low mass lepton pairs. The low mass dilepton region is important for heavy ion collisions because of the interest in thermal dilepton production as a signature of the early time dynamics of the medium. Methods: Building on previous work, azimuthal correlations between leptons from semileptonic decays of heavy flavor hadrons are examined. The exclusive \textsc{HVQMNR} code is used in the calculations, made in the PHENIX acceptance at $\sqrt{s} = 200$~GeV and for dielectrons in ALICE at $\sqrt{s} = 13$~TeV. The $b \overline b$ decay contributions subtract like-sign lepton pairs from the opposite-sign signal. Results: The next-to-leading order calculations reproduce the trends of the PHENIX data. The calculations at 13~TeV show a change in signal as electron pair $p_T$ is increased, with the peak of the $Δϕ$ distribution moving from $Δϕ\sim π$ to $\sim 0$ and the contribution from bottom decays becoming dominant. The sensitivity of the signal to $k_T$ broadening is also studied and found to be small. Conclusions: It is found that the dependence on $k_T$ broadening previously observed is significantly reduced by the decay process. Despite this, the correlations between decay leptons retains some memory of the correlations between the parent hadrons in $p+p$ collisions. However, to study these correlations in heavy-ion collisions, it is necessary to separate them from thermal dilepton production in the same mass region.

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。

↑