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A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton–proton collisions at √s=8TeVcollected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5fb−1. The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate ˜
t2decaying to a lighter top-squark mass eigenstate ˜t1via either ˜t2→H˜
t1or ˜t2→Z˜
t1, followed in both cases by ˜t1→t˜
χ01, where ˜
χ01is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between the ˜
t1and ˜
χ01states is approximately equal to the top-quark mass (m˜
t1−m˜
χ01mt), which is not probed by searches for direct ˜
t1squark pair production. The analysis excludes top squarks with masses m˜
t2<575GeVand m˜
t1<400GeVat a 95% confidence level.
S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan,
W Adam, T Bergauer, et al. (2014). Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s=8 TeV. PHYSICS LETTERS. SECTION B, 736, 371-397 [10.1016/j.physletb.2014.07.053].
Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s=8 TeV
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Bianchi;P. Bloch;A. Bocci;A. Bonato;O. Bondu;C. Botta;H. Breuker;T. Camporesi;G. Cerminara;T. Christiansen;J. A. Coarasa Perez;S. Colafranceschi;M. D’Alfonso;D. d’Enterria;A. Dabrowski;A. David;F. De Guio;A. De Roeck;S. De Visscher;M. Dobson;N. Dupont Sagorin;A. Elliott Peisert;J. Eugster;G. Franzoni;W. Funk;M. Giffels;D. Gigi;K. Gill;D. Giordano;M. Girone;M. Giunta;F. Glege;R. Gomez Reino Garrido;S. Gowdy;R. Guida;J. Hammer;M. Hansen;P. Harris;J. Hegeman;V. Innocente;P. Janot;E. Karavakis;K. Kousouris;K. Krajczar;P. Lecoq;C. Lourenço;N. Magini;L. Malgeri;M. Mannelli;L. Masetti;F. Meijers;S. Mersi;E. Meschi;F. Moortgat;M. Mulders;P. Musella;L. Orsini;E. Palencia Cortezon;L. Pape;E. Perez;L. Perrozzi;A. Petrilli;G. Petrucciani;A. Pfeiffer;M. Pierini;M. Pimiä;D. Piparo;M. Plagge;A. Racz;W. Reece;G. Rolandi;M. Rovere;H. Sakulin;F. Santanastasio;C. Schäfer;C. Schwick;S. Sekmen;A. Sharma;P. Siegrist;P. Silva;M. Simon;P. Sphicas;D. Spiga;J. Steggemann;B. Stieger;M. Stoye;D. Treille;A. 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2014
Abstract
A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton–proton collisions at √s=8TeVcollected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5fb−1. The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate ˜
t2decaying to a lighter top-squark mass eigenstate ˜t1via either ˜t2→H˜
t1or ˜t2→Z˜
t1, followed in both cases by ˜t1→t˜
χ01, where ˜
χ01is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between the ˜
t1and ˜
χ01states is approximately equal to the top-quark mass (m˜
t1−m˜
χ01mt), which is not probed by searches for direct ˜
t1squark pair production. The analysis excludes top squarks with masses m˜
t2<575GeVand m˜
t1<400GeVat a 95% confidence level.
S Chatrchyan, V Khachatryan, A M Sirunyan, A Tumasyan,
W Adam, T Bergauer, et al. (2014). Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s=8 TeV. PHYSICS LETTERS. SECTION B, 736, 371-397 [10.1016/j.physletb.2014.07.053].
S Chatrchyan; V Khachatryan; A M Sirunyan; A Tumasyan;
W Adam; T Bergauer; M Dragicevic; J Erö; C Fabjan; M Friedl; R Frühwirth; V M Ghete; C Hartl; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/416968
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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.