单个类矢量B夸克在紧凑型线性对撞机上通过bZ衰变道的产生  

Single production of the vector-like B quark at CLIC via bZ channel

作　　者：崔小敏[1] 李亚桢 王奕戈 刘要北[1] Cui Xiaomin;Li Yazhen;Wang Yige;Liu Yaobei(School of Mechanical and Electrical Engineering,Henan Institute of Science and Technology,Xinxiang 453000,China;School of Mathematics Science,Henan Institute of Science and Technology,Xinxiang 453000,China)

机构地区：[1]河南科技学院机电学院,河南新乡453000 [2]河南科技学院数学科学学院,河南新乡453000

出　　处：《河南师范大学学报（自然科学版）》2023年第3期131-135,共5页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(12275067);河南省自然科学基金(222300420443);河南省高等学校重点科研项目(22A140019).

摘　　要：许多超出标准模型的新物理都预测了新的类矢量夸克.它们会在高能对撞机上产生独特的信号.基于模型无关的框架,研究了单态的类矢量B夸克在质心能量为3 TeV的紧凑型线性对撞机上的单个产生过程.重点研究e^(+)e^(-)→B→Zb过程以及Z玻色子两种衰变道(Z→l^(+)l^(-)和Z→v)的末态信号.通过对信号和标准模型背景的分析,分别给出了在年积分亮度为5 ab^(-1)下对B夸克质量和耦合参数的排除限制和发现范围.数值结果表明,未来的高能量线性对撞机可以作为探测类矢量B夸克的电弱耦合的理想场所.Many new physics scenarios beyond the Standard Model predict new vector-like quarks that could produce unique signals at high-energy colliders.Based on a model-independent framework,we investigate the prospect of discovering the singlet vector-like bottom quark(VLQ-B)in collisions at 3 TeV Compact Linear Collider.We study the single VLQ-B production process e^(+)e^(-)→B→Zb,with two types of decay channels:Z→l^(+)l^(-)and Z→v.By carrying out a full simulation for the signals and the relevant SM backgrounds,the exclusion limit and discovery prospects are,respectively,obtained on the VLQ-B quark mass and the coupling strength with the integrated luminosity of 5 ab^(-1).Our numerical results show that future high-energy linear colliders could serve as ideal sites for probing electroweak coupling of VLQ-B.

关 键 词：类矢量夸克 紧凑型线性对撞机 产生截面 

分 类 号：O572.22[理学—粒子物理与原子核物理]