MeasurementsofdecaybranchingfractionsofH→b■/c■/gginassociated（e+e-/μ+μ-）HproductionattheCEPC

被引：0

作者：

白羽 ^{[1
]}

陈春晖 ^{[2
]}

方亚泉 ^{[3
]}

李刚 ^{[3
]}

阮曼奇 ^{[3
]}

史静远 ^{[1
,4
]}

王博 ^{[1
,5
]}

孔攀宇 ^{[1
,6
]}

兰博扬 ^{[1
]}

刘站峰 ^{[1
]}

机构：

[1] School of Physics, Southeast University

[2] Department of Physics and Astronomy, Iowa State University

[3] Institute of High Energy Physics, Chinese Academy of Sciences

[4] School of physics and astronomy, the University of Manchester

[5] Department of Physics, College of Sciences, Northeastern University

[6] School of Cyber Science and Engineering, Southeast University

来源：

Chinese Physics C | 2020年 / 01期

关键词：

the Higgs boson; CEPC; branching fraction; flavor tagging;

D O I：

暂无

中图分类号：

O572.2 [粒子物理学];

学科分类号：

070202 ;

摘要：

The high-precision measurement of Higgs boson properties is one of the primary goals of the Circular Electron Positron Collider（CEPC）.The measurements ofH→b■/c■/gg decay branching fraction in the CEPC experiment is presented,considering a scenario of analysing 5000 fb-1 e+e-collision data with the center-of-mass energy of 250 Ge V.In this study the Higgs bosons are produced in association with a pair of leptons,dominantly mediated by the ZH production process.The statistical uncertainty of the signal cross section is estimated to be about 1%in theH→b■ final state,and approximately 5%-10%in theH→c■/gg final states.In addition,the main sources of the systematic uncertainties and their impacts to the measurements of branching fractions are discussed.This study demonstrates the potential of precise measurement of the hadronic final states of the Higgs boson decay at the CEPC,and will provide key information to understand the Yukawa couplings between the Higgs boson and quarks,which are predicted to be the origin of quarks’masses in the standard model.

引用

页码：4 / 13

页数：10

共 4 条

[1]

Updated baseline for a staged Compact Linear Collider .2 The CLIC,CLICdp Collaborations. .

[2]

M.Greco,G.Montagna,O.Nicrosini et al. Phys.Lett.B . 2018

[3]

D.Bardin,B.Vilensky,P.Khristova. Sov.J.Nucl.Phys . 1991

[4]

ATLAS Collaboration. Phys. Lett. B . 2012

← 1 →