arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1203.1302hep-ex
收藏

在LHC用ATLAS探测器测量单个强子响应和量热计喷流能量标度的不确定性

Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LHC

ATLAS Collaboration

摘要:

导出了大型强子对撞机(LHC)ATLAS实验中量热计能量对粒子喷流响应的不确定度。首先,量热计响应单个孤立的带电强子的测量和比较的蒙特卡罗模拟使用质子-质子碰撞在质量中心的能量sqrt(s)= 900 GeV和7 TeV在2009年和2010年收集。然后,利用K_s和λ粒子的衰变,测量了量热计对特定类型粒子(带正电荷和负电荷的π介子、质子和反质子)的响应,并与Monte Carlo预测进行了比较。最后,通过传播单个带电粒子和中性粒子对射流的响应不确定性来确定射流能量尺度的不确定性。中心孤立强子的响应不确定度为2-5%,最终量热计喷流能量标度的响应不确定度为1-3%。

英文摘要:

The uncertainty on the calorimeter energy response to jets of particles is derived for the ATLAS experiment at the Large Hadron Collider (LHC). First, the calorimeter response to single isolated charged hadrons is measured and compared to the Monte Carlo simulation using proton-proton collisions at centre-of-mass energies of sqrt(s) = 900 GeV and 7 TeV collected during 2009 and 2010. Then, using the decay of K_s and Lambda particles, the calorimeter response to specific types of particles (positively and negatively charged pions, protons, and anti-protons) is measured and compared to the Monte Carlo predictions. Finally, the jet energy scale uncertainty is determined by propagating the response uncertainty for single charged and neutral particles to jets. The response uncertainty is 2-5% for central isolated hadrons and 1-3% for the final calorimeter jet energy scale.

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。

↑