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Characteristics of multi-particle production in proton-proton collisions at √s=7 TeV are studied as a function of the charged-particle multiplicity, Nch. The produced particles are separated into two classes: those belonging to jets and those belonging to the underlying event. Charged particles are measured with pseudorapidity |η|<2.4 and transverse momentum pT > 0.25 GeV/c. Jets are reconstructed from charged-particles only and required to have pT > 5 GeV/c. The distributions of jet pT, average pT of charged particles belonging to the underlying event or to jets, jet rates, and jet shapes are presented as functions of Nch and compared to the predictions of the PYTHIA and HERWIG event generators. Predictions without multi-parton interactions fail completely to describe the Nch-dependence observed in the data. For increasing Nch, PYTHIA systematically predicts higher jet rates and harder pT spectra than seen in the data, whereas HERWIG shows the opposite trends. At the highest multiplicity, the data–model agreement is worse for most observables, indicating the need for further tuning and/or new model ingredients.
S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, et al. (2013). Jet and underlying event properties as a function of charged-particle multiplicity in proton–proton collisions at √s = 7 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 73, 1-26 [10.1140/epjc/s10052-013-2674-5].
Jet and underlying event properties as a function of charged-particle multiplicity in proton–proton collisions at √s = 7 TeV
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Kravchenko;J. Lazo Flores;S. Malik;F. Meier;G. R. Snow;J. Dolen;A. Godshalk;I. Iashvili;S. Jain;A. Kharchilava;A. Kumar;S. Rappoccio;Z. Wan;G. Alverson;E. Barberis;D. Baumgartel;M. Chasco;J. Haley;A. Massironi;D. Nash;T. Orimoto;D. Trocino;D. Wood;J. Zhang;A. Anastassov;K. A. Hahn;A. Kubik;L. Lusito;N. Mucia;N. Odell;B. Pollack;A. Pozdnyakov;M. Schmitt;S. Stoynev;K. Sung;M. Velasco;S. Won;D. Berry;A. Brinkerhoff;K. M. Chan;M. Hildreth;C. Jessop;D. J. Karmgard;J. Kolb;K. Lannon;W. Luo;S. Lynch;N. Marinelli;D. M. Morse;T. Pearson;M. Planer;R. Ruchti;J. Slaunwhite;N. Valls;M. Wayne;M. Wolf;L. Antonelli;B. Bylsma;L. S. Durkin;C. Hill;R. Hughes;K. Kotov;T. Y. Ling;D. Puigh;M. Rodenburg;G. Smith;C. Vuosalo;B. L. Winer;H. Wolfe;E. Berry;P. Elmer;V. Halyo;P. Hebda;J. Hegeman;A. Hunt;P. Jindal;S. A. Koay;P. Lujan;D. Marlow;T. Medvedeva;M. Mooney;J. Olsen;P. Piroué;X. Quan;A. Raval;H. Saka;D. Stickland;C. Tully;J. S. Werner;S. C. Zenz;A. Zuranski;E. Brownson;A. Lopez;H. Mendez;J. E. 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Spanier;Z. C. Yang;A. York;O. Bouhali;R. Eusebi;W. Flanagan;J. Gilmore;T. Kamon;V. Khotilovich;R. Montalvo;I. Osipenkov;Y. Pakhotin;A. Perloff;J. Roe;A. Safonov;T. Sakuma;I. Suarez;A. Tatarinov;D. Toback;N. Akchurin;C. Cowden;J. Damgov;C. Dragoiu;P. R. Dudero;K. Kovitanggoon;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;C. Lin;C. Neu;J. Wood;S. Gollapinni;R. Harr;P. E. Karchin;C. Kottachchi Kankanamge Don;P. Lamichhane;A. Sakharov;D. A. Belknap;L. Borrello;D. Carlsmith;M. Cepeda;S. Dasu;S. Duric;E. Friis;M. Grothe;R. Hall Wilton;M. Herndon;A. Hervé;P. Klabbers;J. Klukas;A. Lanaro;R. Loveless;A. Mohapatra;I. Ojalvo;T. Perry;G. A. Pierro;G. Polese;I. Ross;T. Sarangi;A. Savin;W. H. Smith;J. Swanson
2013
Abstract
Characteristics of multi-particle production in proton-proton collisions at √s=7 TeV are studied as a function of the charged-particle multiplicity, Nch. The produced particles are separated into two classes: those belonging to jets and those belonging to the underlying event. Charged particles are measured with pseudorapidity |η|<2.4 and transverse momentum pT > 0.25 GeV/c. Jets are reconstructed from charged-particles only and required to have pT > 5 GeV/c. The distributions of jet pT, average pT of charged particles belonging to the underlying event or to jets, jet rates, and jet shapes are presented as functions of Nch and compared to the predictions of the PYTHIA and HERWIG event generators. Predictions without multi-parton interactions fail completely to describe the Nch-dependence observed in the data. For increasing Nch, PYTHIA systematically predicts higher jet rates and harder pT spectra than seen in the data, whereas HERWIG shows the opposite trends. At the highest multiplicity, the data–model agreement is worse for most observables, indicating the need for further tuning and/or new model ingredients.
S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, et al. (2013). Jet and underlying event properties as a function of charged-particle multiplicity in proton–proton collisions at √s = 7 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 73, 1-26 [10.1140/epjc/s10052-013-2674-5].
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;N. Hörma...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/232472
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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.