arXiv 1802.018402018-02hep-ex

用ATLAS实验寻找$B^0_s π^\pm$不变质谱中的结构

Search for a Structure in the $B^0_s π^\pm$ Invariant Mass Spectrum with the ATLAS Experiment

ATLAS Collaboration

备注：: 26 pages in total, author list starting page 10, 3 figures, 1 table, published in Phys. Rev. Lett. 120 (2018) 202007. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2017-02/
发表信息：: Phys. Rev. Lett. 120 (2018) 202007
DOI：: 10.1103/PhysRevLett.120.202007

摘要：

搜索的窄结构，$X(5568)$，由D 0合作报告的衰变序列$X \to B^0_s π^\pm$，$B^0_s \to J/ψϕ$，提出。分析是基于在LHC与ATLAS探测器记录的数据样本对应于4.9 FB $^{-1}$的$pp$碰撞在7 TeV和19.5 FB $^{-1}$在8 TeV。在95%的置信水平下，确定了信号事件数量的上限，这些信号事件的属性与D 0报告的属性相对应，以及$X$相对于$B^0_s$介子$ρ_X$的生产率。对于横动量大于10 GeV的$B^0_s$介子，结果为$N(X) < 382$和$ρ_X < 0.015$;对于横动量大于15 GeV的$N(X) < 356$和$ρ_X < 0.016$.还为质量范围为5550 MeV至5700 MeV的潜在$B^0_s π^\pm$共振设定了限值。

英文摘要：

A search for the narrow structure, $X(5568)$, reported by the D0 Collaboration in the decay sequence $X \to B^0_s π^\pm$, $B^0_s \to J/ψϕ$, is presented. The analysis is based on a data sample recorded with the ATLAS detector at the LHC corresponding to 4.9 fb$^{-1}$ of $pp$ collisions at 7 TeV and 19.5 fb$^{-1}$ at 8 TeV. No significant signal was found. Upper limits on the number of signal events, with properties corresponding to those reported by D0, and on the $X$ production rate relative to $B^0_s$ mesons, $ρ_X$, were determined at 95% confidence level. The results are $N(X) < 382$ and $ρ_X < 0.015$ for $B^0_s$ mesons with transverse momenta above 10 GeV, and $N(X) < 356$ and $ρ_X < 0.016$ for transverse momenta above 15 GeV. Limits are also set for potential $B^0_s π^\pm$ resonances in the mass range 5550 MeV to 5700 MeV.

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。

摘要：

英文摘要：

相关论文