<p>Using <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41605_2025_530_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="133" /> </InlineMediaObject> <EquationSource Format="TEX">$(10087 \pm 44) \times 10^6$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <mo stretchy="false">(</mo> <mn>10087</mn> <mo>±</mo> <mn>44</mn> <mo stretchy="false">)</mo> </mrow> <mo>×</mo> <msup> <mn>10</mn> <mn>6</mn> </msup> </mrow> </math></EquationSource> </InlineEquation> <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41605_2025_530_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="34" /> </InlineMediaObject> <EquationSource Format="TEX">$J/\psi $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>J</mi> <mo stretchy="false">/</mo> <mi>ψ</mi> </mrow> </math></EquationSource> </InlineEquation> events collected with the BESIII detector in 2009, 2012, 2018 and 2019, the tracking efficiency of charged pions is studied using the decay <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41605_2025_530_Article_IEq3.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="114" /> </InlineMediaObject> <EquationSource Format="TEX">$J/\psi \rightarrow \pi ^+ \pi ^- \pi ^0$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>J</mi> <mo stretchy="false">/</mo> <mi>ψ</mi> <mo stretchy="false">→</mo> <msup> <mi>π</mi> <mo>+</mo> </msup> <msup> <mi>π</mi> <mo>-</mo> </msup> <msup> <mi>π</mi> <mn>0</mn> </msup> </mrow> </math></EquationSource> </InlineEquation>. The systematic uncertainty of the tracking efficiency and the corresponding correction factors for charged pions are evaluated, in bins of transverse momentum and polar angle of the charged pions.</p>

Study of the tracking efficiency of charged pions at BESIII

期刊论文
发表日期：

2025年2月5日

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Fang Liu,
Xiao-Bin Ji,
Sheng-Sen Sun,
Huai-Min Liu,
Shuang-Shi Fang,
Xiao-Ling Li,
Tong Chen,
Xin-Nan Wang,
Ming-Run Li,
Liang-Liang Wang,
Ling-Hui Wu,
Ye Yuan,
Yao Zhang,
Wen-Jing Zhu

摘要

Using $(10087 \pm 44) \times 10^6$ $(10087 \pm 44) \times 10^{6}$ $J/\psi $ $J / ψ$ events collected with the BESIII detector in 2009, 2012, 2018 and 2019, the tracking efficiency of charged pions is studied using the decay $J/\psi \rightarrow \pi ^+ \pi ^- \pi ^0$ $J / ψ \to π^{+} π^{-} π^{0}$ . The systematic uncertainty of the tracking efficiency and the corresponding correction factors for charged pions are evaluated, in bins of transverse momentum and polar angle of the charged pions.