Measurement of the Jet Mass Distribution and Top Quark Mass in Hadronic Decays of Boosted Top Quarks in pp Collisions at s=13 TeV
Measurement of the Jet Mass Distribution and Top Quark Mass in Hadronic Decays of Boosted Top Quarks in pp Collisions at s=13 TeV
复制标题
s=13-TeV pp 碰撞中增强顶夸克强子衰变中喷流质量分布和顶夸克质量的测量
DOI：
10.1103/physrevlett.124.202001
复制
发表时间：
2020
影响因子：
8.6
通讯作者：
Flechl, M.
中科院分区：
文献类型：
--
作者：
Sirunyan, A. M.;Tumasyan, A.;Adam, W.;Ambrogi, F.;Bergauer, T.;Brandstetter, J.;Dragicevic, M.;Erö, J.;Escalante Del Valle, A.;Flechl, M.
报道了一种测量方法，测量了在碰撞中产生的助推顶夸克在强子衰变中的喷流质量分布。数据由大型强子对撞机的CMS探测器收集，对应的综合光度为。测量在事件通道中进行，其中轻子是电子或介子。强子顶夸克衰变的产物被重构为横向动量大于400gev的单喷流。横截面作为射流质量的函数在粒子水平展开，并用于提取的顶夸克质量的值。本文首次在大型强子对撞机上应用了一种新的射流重建技术，该技术的测量精度比先前的测量精度提高了3倍。这突出了利用增强顶夸克进行测量的潜力，新技术将使未来的精确测量成为可能。
A measurement is reported of the jet mass distribution in hadronic decays of boosted top quarks produced incollisions at. The data were collected with the CMS detector at the LHC and correspond to an integrated luminosity of. The measurement is performed in thechannel ofevents, where the lepton is an electron or muon. The products of the hadronic top quark decayare reconstructed as a single jet with transverse momentum larger than 400 GeV. Thecross section as a function of the jet mass is unfolded at the particle level and used to extract a value of the top quark mass of. A novel jet reconstruction technique is used for the first time at the LHC, which improves the precision by a factor of 3 relative to an earlier measurement. This highlights the potential of measurements using boosted top quarks, where the new technique will enable future precision measurements.