dorsal/arxiv
View SchemaExtract Signals by Fitting $\chi^2$ Distribution of the Kinematic Fit
| Authors | Ping Rong-Gang, Mo Xiao-Hu, Du Shu-Xian, Liu Jing, Ma Lian-Liang, Shen Cheng-Ping, Wang Zhi-Yong, Yuan Chang-Zheng |
|---|---|
| Categories | |
| ArXiv ID | physics/0608213 |
| URL | https://arxiv.org/abs/physics/0608213 |
Abstract
In measuring the $\psip$ radiative decays at BESII, contribution of the background is serious in most of the final states. To extract the number of signal events, a fit to the $\chi^2$ distribution of kinematic fit using signal and background components is proposed. Extensive Monte-Carlo simulations (MCS) are performed, and the results show that the shape of $\chi^2$ distribution of the signal channel looks different from those of the background channels, thus it provides us by fitting the $\chi^2$ distribution of the data to extract the number of signal events. An input-output test is performed using MCS, and the uncertainty of the fit method is found to be less than 2%.
{
"annotation_id": "71e5b49b-c938-46a1-973f-3afcf8afd42d",
"date_created": "2026-03-02T18:01:10.800000Z",
"date_modified": "2026-03-02T18:01:10.800000Z",
"file_hash": "c8f56223d76ffe5c663f3571bab4868a62d43966cf96cf16031d889a1e0bb682",
"private": false,
"record": {
"abstract": "In measuring the $\\psip$ radiative decays at BESII, contribution of the\nbackground is serious in most of the final states. To extract the number of\nsignal events, a fit to the $\\chi^2$ distribution of kinematic fit using signal\nand background components is proposed. Extensive Monte-Carlo simulations (MCS)\nare performed, and the results show that the shape of $\\chi^2$ distribution of\nthe signal channel looks different from those of the background channels, thus\nit provides us by fitting the $\\chi^2$ distribution of the data to extract the\nnumber of signal events. An input-output test is performed using MCS, and the\nuncertainty of the fit method is found to be less than 2%.",
"arxiv_id": "physics/0608213",
"authors": [
"Ping Rong-Gang",
"Mo Xiao-Hu",
"Du Shu-Xian",
"Liu Jing",
"Ma Lian-Liang",
"Shen Cheng-Ping",
"Wang Zhi-Yong",
"Yuan Chang-Zheng"
],
"categories": [
"physics.data-an"
],
"title": "Extract Signals by Fitting $\\chi^2$ Distribution of the Kinematic Fit",
"url": "https://arxiv.org/abs/physics/0608213"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "8138b8e5-4371-4258-893f-04c449586b48",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}