Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.15048 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912788837826560 |
|---|---|
| author | Yang, Tianyi Li, Congqiao |
| author_facet | Yang, Tianyi Li, Congqiao |
| contents | We present a calibratable, jet-free framework that enhances the search significance of the flagship LHC channel $HH \to 4b$ by more than a factor of five compared to existing approaches. The method employs a mass-decorrelated discriminant to identify $h_1 h_2 \to 4b$ with variable $h_{1,2}$ masses and a simultaneous estimator of $(m_{h_1}, m_{h_2})$, both derived from multiclass classification on all-particle inputs. The $HH$ signal response can be calibrated using $ZZ \to 4b$. Using a highly realistic simulation framework validated through multiple tests, we demonstrate the method's robustness and identify two prerequisites essential for achieving this level of sensitivity. Results indicate that with LHC Run 2 and 3 data, observation-level sensitivity to $HH$ appears within reach, enabling constraints on $κ_λ$ comparable to HL-LHC projections and offering an accelerated path to precision measurements of the Higgs trilinear coupling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_15048 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Potential of di-Higgs observation via a calibratable jet-free $HH\to 4b$ framework Yang, Tianyi Li, Congqiao High Energy Physics - Phenomenology High Energy Physics - Experiment We present a calibratable, jet-free framework that enhances the search significance of the flagship LHC channel $HH \to 4b$ by more than a factor of five compared to existing approaches. The method employs a mass-decorrelated discriminant to identify $h_1 h_2 \to 4b$ with variable $h_{1,2}$ masses and a simultaneous estimator of $(m_{h_1}, m_{h_2})$, both derived from multiclass classification on all-particle inputs. The $HH$ signal response can be calibrated using $ZZ \to 4b$. Using a highly realistic simulation framework validated through multiple tests, we demonstrate the method's robustness and identify two prerequisites essential for achieving this level of sensitivity. Results indicate that with LHC Run 2 and 3 data, observation-level sensitivity to $HH$ appears within reach, enabling constraints on $κ_λ$ comparable to HL-LHC projections and offering an accelerated path to precision measurements of the Higgs trilinear coupling. |
| title | Potential of di-Higgs observation via a calibratable jet-free $HH\to 4b$ framework |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2508.15048 |