Charming Decays of the Higgs, Z, and W Bosons : Development and Deployment of a New Calibration Method for Charm Jet Identification / / by Spandan Mondal
(Visualizza in formato marc)
(Visualizza in BIBFRAME)
| Autore: |
Mondal Spandan
|
| Titolo: |
Charming Decays of the Higgs, Z, and W Bosons : Development and Deployment of a New Calibration Method for Charm Jet Identification / / by Spandan Mondal
|
| Pubblicazione: | Cham : , : Springer Nature Switzerland : , : Imprint : Springer, , 2025 |
| Edizione: | 1st ed. 2025. |
| Descrizione fisica: | 1 online resource (XVI, 160 p. 50 illus., 44 illus. in color.) |
| Disciplina: | 539.72 |
| Soggetto topico: | Particles (Nuclear physics) |
| Quantum field theory | |
| Particle accelerators | |
| Particle Physics | |
| Elementary Particles, Quantum Field Theory | |
| Accelerator Physics | |
| Nota di contenuto: | Introduction -- The Standard Model -- Experimental setup -- Data analysis technologies -- Physics object definitions -- Flavour tagging -- Charm tagger calibration -- Analysis strategy -- The VHcc, VZcc, and VWcq analyses -- Signal extraction -- Conclusion. |
| Sommario/riassunto: | This book presents searches for the Higgs boson, Z boson, and W boson decaying into charm quark(s) performed with proton-proton collision data at √s = 13TeV collected by the CMS experiment at the LHC, CERN, corresponding to an integrated luminosity of 138 fb−1 and recorded between 2016 and 2018. The searches are carried out using events in which the Higgs/Z/W boson is produced in association with a leptonically-decaying Z or W boson. This thesis also discusses a novel calibration algorithm for charm jet identification that enables maximal use of the available information related to charm jets. The new method is used to correct the entire distribution expected as output when jet flavour identification algorithms are applied to jets of different flavours. The calibrated results improve over traditional efficiency measurements and help enhance the sensitivities of the Higgs, Z, and W searches. This book primarily reports on the so-called resolved-jet topology of the Higgs/Z/W boson searches, where the boson candidates are reconstructed using two separate small-radius (AK4) jets. Upon statistically combining the results of the resolved-jet search with a complementary merged-jet approach, the observed (expected) upper limit on the Higgs decay to charm quarks corresponds to 14 (7.6) times the Standard Model expectation at the 95% CL which is the most stringent direct limit to date. A significance of 5.7σ (5.9σ) over the background-only prediction is observed (expected) in case of the search for charmed Z boson decays. Only the resolved-jet topology is used in the search for charmed W decays and the observed (expected) significance is 5.6σ (5.7σ) over the background-only prediction. These mark the first observations of charmed decays of the Z and W bosons at a hadron collider experiment. |
| Titolo autorizzato: | Charming Decays of the Higgs, Z, and W Bosons |
| ISBN: | 9783031846779 |
| Formato: | Materiale a stampa  |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione: | Inglese |
| Record Nr.: | 9911002552203321 |
| Lo trovi qui: | Univ. Federico II |
| Opac: | Controlla la disponibilità qui |
Serie:
Springer Theses, Recognizing Outstanding Ph.D. Research, . 2190-5061