Speculations on the W-mass measurement at CDF
文献类型：期刊论文
| 作者 | Gu, Jiayin2; Liu, Zhen3; Ma, Teng4; Shu, Jing1,5,6,7
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| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2022 |
| 卷号 | 46期号:12页码:123107 |
| 关键词 | BREAKING |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/ac8cd5 |
| 英文摘要 | he W mass determination at the Tevatron CDF experiment reported a deviation from the SM expecta-tion at the 7 sigma level. We discuss a few possible interpretations and their collider implications. We perform elec-troweak global fits under various frameworks and assumptions. We consider three types of electroweak global fits inthe effective-field-theory framework: the S-T, S-T-, and eight-parameter flavor-universal one. We discuss theamounts of tensions between different measurements reflected in these fits and the corresponding shifts in cent-ral values of these parameters. With these electroweak fit pictures in hand, we present a few different classes of mod-els and discuss their compatibility with these results. We find that while explaining the discrepancy, the singlegauge boson extensions face strong LHC direct search constraints unless the is fermiophobic (leptophobic),which can be realized if extra vector fermions (leptons) mix with the SM fermions (leptons). Vector-like top part-ners can partially generate the needed shift to the electroweak observables. The compatibility with the top squark isalso studied in detail. We find that the non-degenerate top squark soft masses enhance the needed operator coeffi-cients, enabling an allowed explanation compatible with current LHC measurements. Overall, more theoretical andexperimental developments are highly in demand to reveal the physics behind this discrepancy. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27861]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Technion Israel Inst Technol, Phys Dept, IL-3200003 H_efa, Israel 2.Fudan Univ, Ctr Field Theory & Particle Phys, Dept Phys, Shanghai 200438, Peoples R China 3.Fudan Univ, Key Lab Nucl Phys & Ion beam Applicat MOE, Shanghai 200433, Peoples R China 4.Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA 5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 6.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 7.Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 8.Int Ctr Theoret Phys Asia Pacific, Hangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gu, Jiayin,Liu, Zhen,Ma, Teng,et al. Speculations on the W-mass measurement at CDF[J]. CHINESE PHYSICS C,2022,46(12):123107. |
| APA | Gu, Jiayin,Liu, Zhen,Ma, Teng,&Shu, Jing.(2022).Speculations on the W-mass measurement at CDF.CHINESE PHYSICS C,46(12),123107. |
| MLA | Gu, Jiayin,et al."Speculations on the W-mass measurement at CDF".CHINESE PHYSICS C 46.12(2022):123107. |
入库方式： OAI收割
来源：理论物理研究所
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