Shape, transverse size, and charged-hadron multiplicity of jets in pp collisions at $ \sqrt{s}=7\;TeV $

H F Heath,I V Akin,R Carroll,A Tiko,C Park,J Rander,C Tully,Y Yilmaz,G Nicolas Kaufman,P Bartalini,D Wang,D Ungaro,E Migliore,F Raupach,P Schlein,D H Kim,W T Ford,A Sakharov,M Sani,P Mane,J Martínez-Ortega,S Frosali,S R Wagner,F A Triantis,P Schleper,J Tucker,P Cushman,I Lokhtin,L Sulak,B Mangano,J Thomsen,C Roland,A De Benedetti,M J Bilinskas,V M Ghete,N Darmenov,M Meschini,N Eggert,I Shreyber,Y Gao,Y Pakhotin,M Marone,I Lazzizzera,J R Komaragiri,G Abbiendi,S C Tonwar,P Kyberd,J Goldstein,R Vidal,O Kodolova,A Drozdetskiy,S Costa,A Raspereza,S Chang,D Pagano,V Stolin,Y W Chang,X Wang,B Francis,V Matveev,C Jeong,M Pieri,M Musich,J Y Kim,C Urscheler,S K Park,D Gelé,F Golf,P Robmann,B Wittmer,D Klingebiel,A Petrukhin,F Odorici,R Dell’Orso,H S Chen,T Yetkin,I Osipenkov,W To,E Tuominen,R Gupta,A Zarubin,L Quertenmont,B Lutz,J Ribnik,S Ochesanu,V Kim,G Flügge,U Dosselli,G Cappello,P Janot,J Slaunwhite,B Dahmes,G H Hammad,S Malhotra,A Sznajder,B Gobbo,D Krofcheck,J Butt,P Goldenzweig,M Mooney,J Mnich,S V Rusakov,M M Obertino,A Peterman,S Sanders,P Harris,C Newman-Holmes,I M Anghel,R Musenich,G Karapostoli,P Schieferdecker,B Hooberman,G Anagnostou,L Fanò,A Branca,G Polese,A Kharchilava,B Casal,J.-M Brom,M Schmanau,C Leonidopoulos,P Juillot,H Kalakhety,D Fasanella,T Ma,C Eskew,K Matchev,A Pozdnyakov,L Tourtchanovitch,D Pitzl,T Weiler,S Hagopian,G Lungu,Zero J Kim,N Wickramage,S Shrestha,J Karancsi,E Luiggi Lopez,C Dragoiu,W Erdmann,F.-P Schilling,F Romeo,X Quan,D Piparo,P A Razis,S Choudhury,P R Dudero,O Kaya,R Rusack,K Arisaka,A Van Spilbeeck,L Agostino,M Bachtis,J P Fernández Ramos,M Margoni,I Iashvili,R Yohay,B Marangelli,P Tan,M D’Alfonso,B Clerbaux,O Prokofyev,G Georgiou,M J Ryan,J E Ramirez Vargas,A Poll,K Lannon,V Popov,H Brun,V O’Dell,B Kargoll,A Kropivnitskaya,L Forthomme,H Arfaei,A Martelli,L Basso,R Loveless,J Ziegler,Y Ma,S König,K Gabathuler,J Liao,E De La Cruz-Burelo,A Markina,X T Huang,W Carvalho,B Snook,R Jussen,C Biino,M E Pol,T Peiffer,T Geralis,J Thompson,R T D’Agnolo,S Boutle,L Kreczko,S Liang,J A Coarasa Perez,V Kumar,O Militaru,G M Dallavalle,B Caponeri,A Belyaev,D Trocino,J Gartner,E Longo,Y Sirois,M A Shah,E Petrakou,T Khurshid,J Sturdy,H Snoek,M Cutajar,S Goy Lopez,J G Bian,M Edelhoff,H Kim,L A T Bauerdick,H Nguyen,T Speer,B Cox,M Kirn,S Folgueras,S Belforte,A Montanari,G B Mohanty,H Enderle,C Saout,Y Mao,L Teodorescu,S Panwalkar,K Mishra,G Cirino,S Cihangir,Y Choi,M Pimiä,L K Gibbons,G Bagliesi,D J A Cockerill,G Rolandi,J Haas,C Sander,B Camanzi,I Suarez,M Vergili,S Afanasiev,G Flucke,E Boos,K Doroba,A Yagil,J Hauser,A T Serban,V Murzin,P Baesso,J Efron,A Sobol,N Cartiglia,U Gasparini,G Bauer,I Grigelionis,A Zabi,T Tabarelli De Fatis,U Grundler,U Gebbert,V Gavrilov,S Taroni,S Goadhouse,E Brownson,T Kuhr,B Tali,C Lazaridis,S Wimpenny,R Castaldi,P Fabbricatore,A Panagiotou,S Evstyukhin,V Epshteyn,X Shi,M Vutova,I R Tomalin,P Moisenz,E M Gregores,W Lin,D Sabes,S Arora,G Iles,P Miné,W Reece,T Hebbeker,J Yelton,N Demaria,S 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Nauenberg,R Ryutin,T Libeiro,J P Cumalat,J Nachtman,M Chen,H Park,M Kirsanov,A Snigirev,U Baur,A Thea,W Sun,R Bainbridge,Z Wan,R Arcidiacono,R Lipton,C Jorda,V Pavlunin,C Calabria,A Cabrera,A M Sirunyan,A Mestvirishvili,A Kayis Topaksu,A Solano,M Serin,B Heyburn,M Arneodo,A Rosowsky,Y Weng,C Mesropian,J S Werner,P Faccioli,D Sperka,J Zang,F Würthwein,Y J Lei,B P Padley,T Lindén,M Pierini,M Ata,D H Miller,Y Ban,I Yu,S Shmatov,Y M Tzeng,D Barge,C E Gerber,R Montalvo,N Valls,P Iaydjiev,E Sexton-Kennedy,P R Hobson,K Lassila-Perini,G M Chen,C Brew,C Milstène,P Meridiani,T Miceli,J G Acosta,D Uzun,P Bortignon,A Knutsson,K Sung,K Theofilatos,O Charaf,P Merkel,J Weng,K Hatakeyama,B Roland,I Ross,T Lampén,H Stadie,I Volobouev,L Guiducci,A Barker,O Grachov,F Ferri,A Dominguez,J A Brochero Cifuentes,C Boulahouache,M Cepeda,Y Onel,M Hollingsworth,Y Ivanov,H Kluge,M Barrett,M Dobson,M Rossini,T Maes,P G Verdini,X Wan,M Niegel,A Delgado Peris,S Gowdy,J Keller,D M Morse,W Clarida,C Nägeli,K V Tsang,J Sammet,N Strobbe,C Marchica,D Loukas,N Almeida,V Blobel,N Tambe,L Masetti,S Metson,N Nishu,D C Miner,M Pernicka,A Morelos Pineda,M Dubinin,E M Da Costa,A Benaglia,K Burkett,N Bacchetta,Y Chen,M Simon,F Moortgat,D J Kong,J Zhang,M Ignatenko,R Guida,L Tauscher,S Di Guida,D Denegri,D Dobur,W Lustermann,J Chung,R Khurana,P Papacz,A Fahim,V Sordini,A Khan,M Snowball,F Santanastasio,J F De Trocóniz,V Sharma,M A Reyes-Santos,A Leonidov,J M Vizan Garcia,C Neu,D Eckstein,K S Sim,G P Di Giovanni,J G Branson,J M Kohli,M Valdata,V Bhatnagar,M Weinberg,A Korytov,F Glege,W Zou,I Villella,Y Yang,Z Hu,D M Raymond,M Zakaria,J Santaolalla,J Hammer,H Pieta,J Haupt,D Liko,P Verdier,M Bontenackels,A Léonard,V Smirnov,R Vilar Cortabitarte,S S Yu,A Marinov,M S Soares,M Malberti,C A Carrillo Montoya,R Cavanaugh,A Venturi,A Staiano,T Kypreos,E Ntomari,E Appelt,M Jones,A Scheurer,E Salvati,R Hadjiiska,N De Filippis,V Karjavin,N Mccoll,E Torassa,D Pellett,I Marfin,N Dupont-Sagorin,D Creanza,E Friis,W Gabella,S Erhan,J Hollar,D Petyt,T S Anjos,J N Butler,F R Cavallo,K H Hoffmann,C Barth,G Ball,M I Asghar,S Cittolin,A Romero,J Sibille,I Belotelov,B C Radburn-Smith,G Zito,A Heister,M Wang,L Vanelderen,A Starodumov,V Cherepanov,F Cavallari,R Wallny,A Brinkerhoff,C Plager,R Schmidt,A Beretvas,R Nandi,I C Park,A Ostapchuk,M Searle,E Barberis,C Johnston,S Gninenko,M Konecki,L Barone,V J Smith,C M Kuo,G Schott,J Ellison,H Mermerkaya,L Wehrli,A Flossdorf,G P Van Onsem,E Laird,F Rebassoo,H Breuker,R Sacchi,F Simonetto,L Brigliadori,G Boudoul,S Qazi,N Tyurin,G Mavromanolakis,C Nuttens,Yu Andreev,S Walsh,S Kunori,I Sfiligoi,J Draeger,M Jarvis,S Sengupta,T Sabonis,A Toropin,M Azarkin,A Vilela Pereira,H Y Jo,D Stickland,G Masetti,M Jo,P Van Mechelen,S Buontempo,L Benussi,J R Vlimant,M Kadastik,N K Mondal,Y Tu,D Hidas,D M Newbold,B Gomber,K Romanowska-Rybinska,N Pastrone,M Meneghelli,I Ojalvo,V Zhukova,G Cerminara,B Rahbaran,M Titov,A Nowack,J Leonard,H Silverwood,T Danielson,A Dierlamm,N Rompotis,P Ronchese,W Behrenhoff,J Richman,V Konoplyanikov,J Hrubec,K Smith,D Baumgartel,T R Fernandez Perez Tomei,C Kottachchi Kankanamge Don,J Fay,N Lychkovskaya,B R Drell,S Conetti,R Magaña Villalba,N Ratnikova,B Rutherford,K Rose,P Van Hove,H R Hoorani,L Scodellaro,C Maguire,N Chanon,H C Kaestli,S F Novaes,J Olson,T Kolberg,A Korablev,S Oliveros,C Fabjan,N Redaelli,A Kalogeropoulos,A Linn,D Menasce,S Obraztsov,N V Tran,A Colaleo,D R Claes,S Greder,A Raval,M Squires,N Akchurin,M Maggi,I Manolakos,A Adair,S Braibant-Giacomelli,A Giammanco,M Chadwick,B Curé,D Del Re,F J Munoz Sanchez,P Azzi,A Dimitrov,D Stuart,A Tsirou,R Doesburg,G S F Stephans,A York,J Temple,J Varela,M Grimes,R Kroeger,A Meyer,J H Kim,D H Moon,S Dasu,E Avdeeva,O Hindrichs,Sandra S Padula,N Leonardo,H Nogima,N Pozzobon,P Paolucci,I Vila,M Merola,S Beranek,H Schettler,D Piccolo,L Di Matteo,F M Stober,V Krychkine,M Stoye,L K Saini,S W Lee,Y Zheng,I Vodopiyanov,L Perchalla,A Nayak,D Gigi,H Pi,J Malclès ,W K Sakumoto ,P Milenović ,M Calderón De La Barca Sánchez ,Arun Kumar ,M Rodenburg ,K Buńkowski ,F Nessi‐Tedaldi ,R Démina ,J Y C Tam ,Qiao Xu ,N Godinović ,V Lemaı̂tre ,J Molnár ,J Milošević ,M H Schmitt ,J Andreä ,A Polatöz ,Sh Jain ,A Rácz ,A Özpineci ,C Laganá ,Р Тенчини ,S Argirò ,Humberto Antonio Salazar Ibarguen ,J Salfeld-Nebgen ,L Fofà ,M Schröder ,Sin Kyu Kang ,В Качанов ,Α Μάρκου ,М Фингер ,Biao Zhu ,Edgar Casimiro Linares ,D Mekterović ,D Blöch ,C Rohringer ,O Doğangün ,O Buchmüller ,Hans Hoffmann ,N Béni ,N Beaupère ,R Schöfbeck ,T Y Ling ,Wee Don Teo ,Z Szillási ,W Białas ,J B Singh ,D R Wardrope ,D Horváth ,Ch Thiebaux ,Ž Antunović ,H J Simonis ,J A Gómez ,S Çerçi ,M Aguilar-Benı́tez ,I Hoş ,J R Smith ,Eric Wayne Vaandering ,D J Summers ,I González Caballero ,Н Голубев ,G Kaußen ,S Özkorucuklu ,H Flächer ,S Perriès ,Daniel John Karmgard ,F A Teischinger ,F Pauß ,V Brigljević ,G Mäggi ,A Custódio ,G P Siroli ,L Dobrzyński ,K Höepfner ,J Königsberg ,G Gökbulut ,A F Osório Oliveros ,M Déjardin ,John Michael Marraffino ,E Palencia Cortezón ,A Adıgüzel ,D Kotliński ,M Krämer ,M Besançon ,O González López ,B K Heltsley ,R López-Fernández ,G Martı́nez ,E Pérez ,A Sánchez-Hernández ,V Reković ,M Grünewald ,M H.g Souza ,G Gómez ,B Wysłouch ,В Сулимов ,H Méndez ,I Dumanoğlu ,C Oʼbrien ,F Özok ,M Passaseo ,K Krajczár ,H Castilla‐Valdez ,J Bellinger ,D Jang ,A Kopecký ,B Işıldak ,D Ćutts ,E Aguiló ,J Fernández Menéndez ,J Härkönen ,V Veszprémi ,P Garcı́a-Abia ,B Akgün ,T Schöerner-Sadenius ,A Sanchez ,E Alagöz ,P Marage ,F Siklér ,A Rinkevičius ,C Tuvé ,K Öcalan ,Hervé A Hervé ,C Schäfer ,M Ataç ,S A Tupputi ,N Daci ,C Martínez Rivero ,M Pioppí ,X T Meng ,M S Rudolph ,А В Виноградов ,B Bylsma ,G Vesztergomb ,E Clément ,Y J Lee ,M C Sawley ,P Killewald ,B Millán Mejías ,P Adžić ,Sa Jain ,J Królikowski ,C Hill ,H Białkowska ,Thomas Hermanns ,А Спиридонов ,I P J Shipsey ,A Calderón ,T Maënpaä ,D De Jesus Damião ,E Eşkut ,C Vuosalo ,M Sobron Sañudo ,L S Durkin ,L Boldizsár ,J Pálinkás ,S Wang ,W L Aldá ,M Cuffani ,P Maksimović ,K Kotov ,A Rýd ,N Hörmann ,S Başeğmez ,M Fernández ,W E Cooper ,Pedro Ribeiro ,B Ujvári ,J Sánchez ,Y Chào ,T Kurča ,S Đurić ,J M Hernández ,M Ekmedžić ,Adrian P Hunt ,Andreas Oehler ,R Pleština ,M E Mattson ,S Röcker ,M Ćwiok ,D Ferenček ,A López ,L Felď ,L Muñiz ,Thomas Schwarz ,Alberto Andres Ocampo Rios ,C Hajdú ,S Baffoni ,S Czellár ,A García-Bellido ,G Önengüt ,Raymond Patrick Kenny ,A Çakır ,G Williams ,M Zieliński ,N Sönmez ,A Rossi ,D A Belknap ,L Cremaldi ,В Жуков ,M Dželalija

doi:10.1007/jhep06(2012)160

Abstract

Abstract Measurements of jet characteristics from inclusive jet production in protonproton collisions at a centre-of-mass energy of 7 TeV are presented. The data sample was collected with the CMS detector at the LHC during 2010 and corresponds to an integrated luminosity of 36 pb−1. The mean charged-hadron multiplicity, the differential and integral jet shape distributions, and two independent moments of the shape distributions are measured as functions of the jet transverse momentum for jets reconstructed with the anti-k T algorithm. The measured observables are corrected to the particle level and compared with predictions from various QCD Monte Carlo generators.

Highlights

Measurements of jet characteristics from inclusive jet production in protonproton collisions at a centre-of-mass energy of 7 TeV are presented
We present measurements of the charged-hadron multiplicity, shape, and transverse size for jets with transverse momentum up to 1 TeV and rapidity up to 3 using 36 pb−1 of pp collisions at a centre-of-mass energy of 7 TeV collected by the CMS experiment at the Large Hadron Collider (LHC)
The CTEQ6L1 [34] parton distribution function (PDF) of the proton is used with tunes D6T and Z2, while the CTEQ5L [35] PDF is used with the Perugia2010 tune

Summary

The CMS detector

CMS uses a right-handed coordinate system in which the z axis points in the anticlockwise beam direction, the x axis points towards the centre of the LHC ring, and the y axis points up, perpendicular to the plane of the LHC ring. The inner tracking system is composed of a pixel detector with three barrel layers at radii between 4.4 and 10.2 cm and a silicon strip tracker with 10 barrel detection layers extending outwards to a radius of 1.1 m. This system is complemented by two endcaps, extending the acceptance up to |η| = 2.5. The calorimeters inside the magnet coil consist of a lead tungstate crystal electromagnetic calorimeter (ECAL) and a brass-scintillator hadron calorimeter (HCAL) with coverage up to |η| = 3. The quartz/steel forward hadron calorimeters extend the calorimetry coverage up to |η| = 5. A detailed description of the CMS detector may be found in [21]

Event selection and reconstruction

Jet observables

Jet shapes

The charged-hadron multiplicity and the transverse size of jets

Results

Summary