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| 001 | 642744 | ||
| 005 | 20251216123029.0 | ||
| 037 | _ | _ | |a PUBDB-2025-05593 |
| 041 | _ | _ | |a English |
| 100 | 1 | _ | |a Vashishtha, Soumyaa |b 0 |e Corresponding author |g female |0 P:(DE-H253)PIP1111374 |u desy |
| 245 | _ | _ | |a Search for long-lived supersymmetric decays in CMS using machine learning methods |f 2024-07-15 - 2025-07-07 |
| 260 | _ | _ | |c 2025 |
| 300 | _ | _ | |a 66 |
| 336 | 7 | _ | |a Output Types/Supervised Student Publication |2 DataCite |
| 336 | 7 | _ | |a Thesis |0 2 |2 EndNote |
| 336 | 7 | _ | |a MASTERSTHESIS |2 BibTeX |
| 336 | 7 | _ | |a masterThesis |2 DRIVER |
| 336 | 7 | _ | |a Master Thesis |b master |m master |0 PUB:(DE-HGF)19 |s 1765882259_1485272 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a SUPERVISED_STUDENT_PUBLICATION |2 ORCID |
| 502 | _ | _ | |a Masterarbeit, University of Cologne, 2025 |c University of Cologne |b Masterarbeit |d 2025 |o 2025-07-07 |
| 520 | _ | _ | |a As the search for physics beyond the Standard Model continues, this thesis presentsan analysis in the long-lived particle (LLP) supersymmetry sector. A Boosted DecisionTree (BDT) classifier was developed to enhance the search for long-lived supersymmetricpartner particles of the tau lepton (stau) particles in the muon-hadronic tau channel at theCMS detector in LHC, motivated by Gauge Mediated Supersymmetry Breaking (GMSB)scenarios. The signal region is characterized by the staus decaying to a muon and hadronictau. These displaced topologies were analyzed with the help of machine learning tools. Usingsimulated Run 2 CMS data, a BDT was constructed, including input feature selection, eventweighting, cross-validation, and model optimization. It demonstrates strong performance,achieving up to 90% signal efficiency while maintaining background misidentification ratesbelow 10−4, depending on the chosen working point. These results demonstrate the BDT’spotential for deployment in ongoing and future searches for long-lived particles at the LHC.Future work will address systematic uncertainties and integrate the BDT into the full eventselection workflow to further improve sensitivity to GMSB-inspired new physics. |
| 536 | _ | _ | |a 611 - Fundamental Particles and Forces (POF4-611) |0 G:(DE-HGF)POF4-611 |c POF4-611 |f POF IV |x 0 |
| 693 | _ | _ | |a LHC |e LHC: CMS |1 EXP:(DE-588)4398783-7 |0 EXP:(DE-H253)LHC-Exp-CMS-20150101 |5 EXP:(DE-H253)LHC-Exp-CMS-20150101 |x 0 |
| 700 | 1 | _ | |a Jolie, Jan |0 P:(DE-HGF)0 |b 1 |e Thesis advisor |
| 700 | 1 | _ | |a Melzer-Pellmann, Isabell |0 P:(DE-H253)PIP1001954 |b 2 |e Thesis advisor |u desy |
| 700 | 1 | _ | |a Desch, Klaus |0 P:(DE-H253)PIP1093322 |b 3 |e Thesis advisor |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/642744/files/Soumyaa_Master_Thesis.pdf |y Restricted |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/642744/files/Soumyaa_Master_Thesis.pdf?subformat=pdfa |x pdfa |y Restricted |
| 910 | 1 | _ | |a Deutsches Elektronen-Synchrotron |0 I:(DE-588b)2008985-5 |k DESY |b 0 |6 P:(DE-H253)PIP1111374 |
| 910 | 1 | _ | |a Deutsches Elektronen-Synchrotron |0 I:(DE-588b)2008985-5 |k DESY |b 2 |6 P:(DE-H253)PIP1001954 |
| 910 | 1 | _ | |a External Institute |0 I:(DE-HGF)0 |k Extern |b 3 |6 P:(DE-H253)PIP1093322 |
| 913 | 1 | _ | |a DE-HGF |b Forschungsbereich Materie |l Matter and the Universe |1 G:(DE-HGF)POF4-610 |0 G:(DE-HGF)POF4-611 |3 G:(DE-HGF)POF4 |2 G:(DE-HGF)POF4-600 |4 G:(DE-HGF)POF |v Fundamental Particles and Forces |x 0 |
| 920 | _ | _ | |l yes |
| 920 | 1 | _ | |0 I:(DE-H253)CMS-20120731 |k CMS |l LHC/CMS Experiment |x 0 |
| 980 | _ | _ | |a master |
| 980 | _ | _ | |a EDITORS |
| 980 | _ | _ | |a VDBINPRINT |
| 980 | _ | _ | |a I:(DE-H253)CMS-20120731 |
| 980 | _ | _ | |a UNRESTRICTED |
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