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Constraints are presented on the total width of the recently discovered Higgs boson, Γ_H, using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The analysis is based on the data collected by the CMS experiment at the LHC in 2011 and 2012, corresponding to integrated luminosities of 5.1 fb^{-1} at a center-of-mass energy sqrt(s) = 7 TeV and 19.7 fb^{-1} at sqrt(s) = 8 TeV. A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Z-boson pair production threshold leads to an upper limit on the Higgs boson width of Γ_H < 22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of m_H = 125.6 GeV.
Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs / V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Ero, C. Fabjan, M. Friedl, R. Fruhwirth, V.M. Ghete, C. Hartl, N. Hormann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knunz, M. Krammer, I. Kratschmer, D. Liko, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 736:(2014), pp. 64-85. [10.1016/j.physletb.2014.06.077]
Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
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Thomas;P. Thomassen;M. Walker;K. Rose;S. Spanier;A. York;O. Bouhali;R. Eusebi;W. Flanagan;J. Gilmore;T. Kamon;V. Khotilovich;V. Krutelyov;R. Montalvo;I. Osipenkov;Y. Pakhotin;A. Perloff;J. Roe;A. Rose;A. Safonov;T. Sakuma;I. Suarez;A. Tatarinov;N. Akchurin;C. Cowden;J. Damgov;C. Dragoiu;P. R. Dudero;J. Faulkner;K. Kovitanggoon;S. Kunori;S. W. Lee;T. Libeiro;I. Volobouev;E. Appelt;A. G. Delannoy;S. Greene;A. Gurrola;W. Johns;C. Maguire;Y. Mao;A. Melo;M. Sharma;P. Sheldon;B. Snook;S. Tuo;J. Velkovska;M. W. Arenton;S. Boutle;B. Cox;B. Francis;J. Goodell;R. Hirosky;A. Ledovskoy;H. Li;C. Lin;C. Neu;J. Wood;R. Harr;P. E. Karchin;C. Kottachchi Kankanamge Don;P. Lamichhane;J. Sturdy;D. A. Belknap;D. Carlsmith;M. Cepeda;S. Dasu;S. Duric;E. Friis;R. Hall Wilton;M. Herndon;A. Herve;P. Klabbers;A. Lanaro;C. Lazaridis;A. Levine;R. Loveless;A. Mohapatra;I. Ojalvo;T. Perry;G. A. Pierro;G. Polese;I. Ross;T. Sarangi;A. Savin;W. H. Smith;C. Vuosalo;N. Woods
2014
Abstract
Constraints are presented on the total width of the recently discovered Higgs boson, Γ_H, using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The analysis is based on the data collected by the CMS experiment at the LHC in 2011 and 2012, corresponding to integrated luminosities of 5.1 fb^{-1} at a center-of-mass energy sqrt(s) = 7 TeV and 19.7 fb^{-1} at sqrt(s) = 8 TeV. A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Z-boson pair production threshold leads to an upper limit on the Higgs boson width of Γ_H < 22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of m_H = 125.6 GeV.
V. Khachatryan; A.M. Sirunyan; A. Tumasyan; W. Adam; T. Bergauer; M. Dragicevic; J. Ero; C. Fabjan; M. Friedl; R. Fruhwirth; V.M. Ghete; C. Hartl; N. ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/888331
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.