论文标题
纵向Z-Boson极化和Higgs玻色子生产横截面
Longitudinal Z-Boson Polarization and the Higgs Boson Production Cross Section at the Large Hadron Collider
论文作者
论文摘要
带电的Lepton对是通过Electroweak仪表孔交换在高能量强子碰撞中大量生产的，并且是大型强子对撞机（LHC）质子 - 普罗顿碰撞中最精确测量的最终状态之一。我们建议，可以使用Lepton角分布的测量来提高HIGGS玻色子生产横截面的理论预测的准确性。为此，我们利用了与纵向Z-Boson极化相关的Lepton角系数的灵敏度，以从传入的质子分离出的胶子对Parton密度函数（PDF），以限制Higgs玻色子玻色子交叉截面与Gluon融合过程的约束。通过使用开源平台XFitter进行的详细数值分析，我们发现在LHC运行III和高光度HL-LHC上对纵向极化的角系数的高统计确定可以改善Higgs Boson Cross Section的PDF系统不确定性，对Higgs Boson Cross段预测50％的Higgs Bosh fargeanties of Higgs boson jappiations boson jappienties boson jappiativities。
Charged lepton pairs are produced copiously in high-energy hadron collisions via electroweak gauge boson exchange, and are one of the most precisely measured final states in proton-proton collisions at the Large Hadron Collider (LHC). We propose that measurements of lepton angular distributions can be used to improve the accuracy of theoretical predictions for Higgs boson production cross sections at the LHC. To this end, we exploit the sensitivity of the lepton angular coefficient associated with the longitudinal Z-boson polarization to the parton density function (PDF) for gluons resolved from the incoming protons, in order to constrain the Higgs boson cross section from gluon fusion processes. By a detailed numerical analysis using the open-source platform xFitter, we find that high-statistics determinations of the longitudinally polarized angular coefficient at the LHC Run III and high-luminosity HL-LHC improve the PDF systematic uncertainties of the Higgs boson cross section predictions by 50% over a broad range of Higgs boson rapidities.
