Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
文献类型：期刊论文
| ; | |
| 作者 | CMS Collaboration |
| 刊名 | NATURE PHYSICS
 ; NATURE PHYSICS
|
| 出版日期 | 2022 ; 2022 |
| 卷号 | 18页码:1329-1334 |
| ISSN号 | 1745-2473 ; 1745-2473 |
| DOI | 10.1038/s41567-022-01682-0 ; 10.1038/s41567-022-01682-0 |
| 文献子类 | Article ; Article |
| 英文摘要 | Since the discovery of the Higgs boson in 2012, detailed studies of its properties have been ongoing. Besides its mass, its width-related to its lifetime-is an important parameter. One way to determine this quantity is to measure its off-shell production, where the Higgs boson mass is far away from its nominal value, and relating it to its on-shell production, where the mass is close to the nominal value. Here we report evidence for such off-shell contributions to the production cross-section of two Z bosons with data from the CMS experiment at the CERN Large Hadron Collider. We constrain the total rate of the off-shell Higgs boson contribution beyond the Z boson pair production threshold, relative to its standard model expectation, to the interval [0.0061, 2.0] at the 95% confidence level. The scenario with no off-shell contribution is excluded at a p-value of 0.0003 (3.6 standard deviations). We measure the width of the Higgs boson as Gamma(H) = 3.2(-1.7)(+2.4) MeV, in agreement with the standard model expectation of 4.1 MeV. In addition, we set constraints on anomalous Higgs boson couplings to W and Z boson pairs.; Since the discovery of the Higgs boson in 2012, detailed studies of its properties have been ongoing. Besides its mass, its width-related to its lifetime-is an important parameter. One way to determine this quantity is to measure its off-shell production, where the Higgs boson mass is far away from its nominal value, and relating it to its on-shell production, where the mass is close to the nominal value. Here we report evidence for such off-shell contributions to the production cross-section of two Z bosons with data from the CMS experiment at the CERN Large Hadron Collider. We constrain the total rate of the off-shell Higgs boson contribution beyond the Z boson pair production threshold, relative to its standard model expectation, to the interval [0.0061, 2.0] at the 95% confidence level. The scenario with no off-shell contribution is excluded at a p-value of 0.0003 (3.6 standard deviations). We measure the width of the Higgs boson as Gamma(H) = 3.2(-1.7)(+2.4) MeV, in agreement with the standard model expectation of 4.1 MeV. In addition, we set constraints on anomalous Higgs boson couplings to W and Z boson pairs. |
| 电子版国际标准刊号 | 1745-2481 ; 1745-2481 |
| 语种 | 英语 ; 英语 |
| WOS记录号 | WOS:000870649900005 ; WOS:000870649900005 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/298923]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | CMS Collaboration. Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production, Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production[J]. NATURE PHYSICS, NATURE PHYSICS,2022, 2022,18, 18:1329-1334, 1329-1334. |
| APA | CMS Collaboration.(2022).Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production.NATURE PHYSICS,18,1329-1334. |
| MLA | CMS Collaboration."Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production".NATURE PHYSICS 18(2022):1329-1334. |
入库方式： OAI收割
来源：高能物理研究所
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