Measurement of the integrated and differentialtt¯production cross sections for high-pTtop quarks inppcollisions ats=8  TeV

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Sander,A Bocci,Q Xu,T Sarkar,S Song,B Dahmes,J Nash,A Godshalk,R Chudasama,A Skuja,L Levchuk,N Rupprecht,Z Demiragli,A Starodumov,G Flügge,S Shulha,V Sharma,A Bhardwaj,K Ranjan,J Wang,H Mildner,K Mondal,M Takahashi,M Klute,Z Wang,B Bilki,L Brianza,N Mirman,Y Roh,S Maruyama,V O’Dell,N Kellams,H Nogima,T Lindén,D Liko,S Linn,A Soha,Y Yang,A Zarubin,A Khan,I Azhgirey,F Rebassoo,A Descroix,V Daponte,K Sung,E Monteil,R Guida,P Merkel,A Hart,E Gottschalk,S Das,C Mclean,D Kovalskyi,J Pekkanen,B Kilminster,T Aziz,S Mersi,A Beretvas,A Knutsson,D Stickland,L Barone,J Poehlsen,A Santoro,W Erdmann,A Borzou,J Hegeman,N Cartiglia,U Sarica,B Francis,H Behnamian,A Tapper,C Baus,N Marinelli,P Millet,M Margoni,S Regnard,R Bainbridge,N Dev,M Murray,D Leggat,C Newman-Holmes,A Rosowsky,M Hildreth,M Schröder,T Esch,M Cuffiani,L Skinnari,S Grünendahl,M Malek,M Selvaggi,E Vlasov,M Paulini,N Stefaniuk,F Thyssen,M Bachtis,A Parker,M Bellato,L Bäni,M Simon,I Dremin,K Long,A Agapitos,N Hörmann,T Perry,K Deiters,M 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Borras,D Gastler,R Lucas,A Bundock,T Chwalek,S Rahatlou,R Gerosa,T Rovelli,A Kalinowski,D Loukas,J Chinellato,S Nuzzo,P Hebda,M Dalchenko,R Syarif,E Bouvier,J Steggemann,M Olschewski,D Anderson,I Bucinskaite,B Calvert,X Coubez,A Gilbert,Q Hassan,A Juodagalvis,A Ghezzi,I Vila,J Yelton,S Jabeen,P Kokkas,J Goh,C Dragoiu,L Pacher,H Li,R Breedon,V Korenkov,A Tiko,T Mulholland,A Abdulsalam,K Ozdemir,E Gülmez,G Rolandi,Y Kubota,S Paoletti,B Boimska,F Frensch,F Ptochos,R Arcidiacono,J Leonard,S Ganjour,K Maeshima,A Savin,T Maerschalk,B Marzocchi,K Rabbertz,Y Onel,B Mahakud,S Obraztsov,W Busza,D Krofcheck,J Hrubec,K Nawrocki,D Stuart,F Xia,N Amapane,A Olbrechts,T Liu,L Spiegel,A Poll,J Strologas,G Safronov,A Nowack,M Chiorboli,C Henderson,M D’Alfonso,V Kim,D Piparo,C Sciacca,W Lange,R Hirosky,D Olivito,R Dell’Orso,D Dutta,S Tosi,F Zenoni,I Papadopoulos,E Yazgan,M Chasco,M Radziej,L Teodorescu,M Hoffmann,K Goebel,R Yonamine,P Schleper,R Lander,A Santocchia,L Corpe,C Asawatangtrakuldee,P Capiluppi,V Palichik,W Luo,N Kovalchuk,L Moreels,L Malgeri,C Ferraioli,D Fasanella,D Menasce,F Würthwein,D Trocino,K Mazumdar,D Cussans,T Libeiro,F Fabbri,M Mulders,R Mankel,J Mans,B Kreis,A Schizzi,Y Go,K Gill,C Schwick,M Danilov,A Moeller,K Chatterjee,A Carnes,E Wolfe,C Seez,K Beernaert,B Asavapibhop,S Belforte,T Ferbel,T Matsushita,M Verzocchi,J Brinson,N Shumeiko,A Fahim,A Zghiche,R Walsh,J Schieck,N Bartosik,N Skatchkov,L Brito,S Durgut,M Foerster,M Dordevic,S Pigazzini,A Sobol,M Kaur,M Chadeeva,R Wolf,P Moisenz,R Lane,W Lohmann,C Riccardi,S Chauhan,K Harder,A Kornmayer,F Lacroix,J Nachtman,L Vanelderen,C Pistone,V Chiochia,M Planer,K Bierwagen,S Abdullin,A Apresyan,B Safarzadeh,J Piedra Gomez,R Bi,Y Iiyama,M Yalvac,U Behrens,S Sen,I Vai,T Peltola,A Kubik,N Pastika,I Pozdnyakov,C Paus,P Azzi,L Scodellaro,O Gutsche,S Dildick,P Dauncey,C Nicolaou,S Braibant-Giacomelli,K Deroover,K Skovpen,S Greene,L Gouskos,L Favart,J.-P Merlo,E Conte,T Virdee,J Lauwers,A Dabrowski,D Burton,E 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Blumenfeld,S Wasserbaech,S Choi,M Guchait,N Varelas,C Hartl,F Couderc,F Preiato,J Bunn,A Tsirou,M Weinberg,I Korol,A Schmidt,E Butz,A Chatterjee,Z Chen,K Flowers,A Nehrkorn,D Petyt,M Verzetti,M Komm,K Lassila-Perini,S Marcellini,A Saha,G Franzoni,G Ryu,L Finco,H Bakhshiansohi,R Potenza,U Gasparini,M Gul,B Roozbahani,P Spagnolo,R Sacchi,J Turkewitz,J Rohlf,Y Erdogan,A.-C Le Bihan,K Kovitanggoon,L Uplegger,I Antropov,E Halkiadakis,L Perniè,P Mcbride,S Bose,M Ruspa,G Apollinari,I Mikulec,P Sorokin,S Malhotra,K Burkett,T Cornelis,M Meschini,L Taylor,N Wickramage,J Castle,S Choudhury,L Mundim,Z Tsamalaidze,J Haas,V Dutta,E Calvo,A Kalogeropoulos,V Ciulli,M Naseri,D Treille,I Krätschmer,P Bunin,T Sarangi,Y Eshaq,J Brandstetter,D Fehling,S Morovic,M Mannelli,E Boos,R Chawla,F Ligabue,N Ruckstuhl,A Pashenkov,M Konyushikhin,D Taylor,T Sakuma,S Narayanan,K Uchida,S Gninenko,M Carver,M Trovato,A Kamenev,M Walker,M Haytmyradov,M Kadastik,S Beauceron,P Paganini,J Wetzel,R Castaldi,T Lomtadze,U Goerlach,W Lustermann,S Dooling,Y Sirois,J Tao,J Roskes,G Majumder,D Ryckbosch,G Funk,V Golovtsov,A Kapoor,K Romanowska-Rybinska,G Mitselmakher,C Fangmeier,A Nikitenko,U Heintz,J Alexander,F Fabozzi,V Epshteyn,M Paganoni,M Goncharov,J Goldstein,G Walia,Y Mao,E Berry,L Dodd,G Bencze,G Cerminara,F Chlebana,H Vogel,K Hatakeyama,P Eller,N Manthos,M Baber,M Heindl,A Elwood,A Savoy-Navarro,H Stadie,E Ntomari,F Blekman,N Krasnikov,M Sharan,A Fagot,J Hauk,S Moortgat,N Strobbe,R Hadjiiska,C Schomakers,M Cerrada,C Hill,P Rumerio,O Hindrichs,U Joshi,D Poyraz,G Roland,C Lourenço,A Ferapontov,P Barria,H Ni,V Perelygin,A Garabedian,C Kleinwort,C Vernieri,D Roy,S Brochet,R Goldouzian,P Elmer,U Husemann,C Roland,R Aggleton,M Gouzevitch,S Fiorendi,M Kaya,N Saoulidou,B Hong,S Gascon,L Cristella,S Khalil,S Dutta,D Acosta,D Marconi,G Bruno,T Kolberg,M Galanti,A Junkes,B Kiani,T Verlage,M Zeyrek,J Thom,J Berryhill,B Vormwald,M Ignatenko,J Sturdy,L Fanò,M Preuten,J Heideman,S Piperov,C Battilana,A Dishaw,J Faulkner,M Voutilainen,T Adams,T Frueboes,J Seixas,I Redondo,A Moraes,D Favart,M Erdmann,V Innocente,M Hamer,T Bergauer,G Tonelli,O Davignon,G Smith,V Sola,P Ma,G Codispoti,I Puljak,A Hortiangtham,Z Hu,P Harris,J Erfle,J Erö,S Xie,M Buttignol,W Adam,M Wang,D Rank,A Pompili,G Quast,E Paradas,J Gran,E Laird,M Sun,N Demaria,Y Maravin,G Hall,M Northup,T Camporesi,A Giassi,M Hempel,A Mertens,A Elliott-Peisert,S Hagopian,D Hsu,H Saka,L Soffi,S Lee,V Calvelli,A Boletti,M Dubinin,T Hebbeker,H Kalakhety,V Khristenko,J Berger,I Iashvili,Y Assran,R Campanini,Z Mao,D Kim,A Zhokin,A Magnani,D Vadruccio,T Ruggles,A Staiano,M Azarkin,S Stoykova,S Bansal,S My,S Cittolin,A Khukhunaishvili,M Maity,C Mironov,Y Musienko,C Calabria,E Barberis,S Tavernier,L Uvarov,J Hammer,A Ershov,Y Pakhotin,Z Xu,D Sheffield,F Nguyen,S Troshin,D Hits,C Clarke,R Bartek,S Maselli,N Pozzobon,J Lee,N Trevisani,M Shoaib,T Dorigo,S Knutzen,I Miagkov,B Gomber,P Connor,A Santra,F Margaroli,C Heidegger,V Murzin,T Ferguson,J Bradmiller-Feld,D Abbaneo,E Dietz-Laursonn,G Brona,M Dittmar,R Horisberger,D Duchardt,D Hare,M Tripathi,D D’Enterria,M Guthoff,E Takasugi,A Karneyeu,E Schlieckau,J Lewis,A Triossi,J Hardenbrook,K Doroba,V Cherepanov,P Robmann,C Lange,A Colaleo,M Giffels,X Janssen,A Adair,Y Wang,M Kirakosyan,G Bolla,P Saxena,A Baty,M Rossini,J Talvitie,S Malik,S Dasu,W Sun,M Gardner,A Calamba,F Moortgat,S Fantinel,M Sani,A Safonov,M Tadel,F Glege,O Bondu,S Gennai,D Bisello,P Verwilligen,W Funk,P Papacz

doi:10.1103/physrevd.94.072002

Abstract

The cross section for pair production of top quarks (t-tbar) with high transverse momenta is measured in pp collisions, collected with the CMS detector at the LHC with sqrt(s) = 8 TeV in data corresponding to an integrated luminosity of 19.7 inverse femtobarns. The measurement is performed using lepton+jets events, where one top quark decays semileptonically, while the second top quark decays to a hadronic final state. The hadronic decay is reconstructed as a single, large-radius jet, and identified as a top quark candidate using jet substructure techniques. The integrated cross section and the differential cross sections as a function of top quark pt and rapidity are measured at particle level within a fiducial region related to the detector-level requirements and at parton level. The particle-level integrated cross section is found to be sigma[t-tbar] = 0.499 +/- 0.035 (stat+syst) +/- 0.095 (theory) +/- 0.013 (lumi) pb for top quark pt > 400 GeV. The parton-level measurement is sigma[t-tbar] = 1.44 +/- 0.10 (stat+syst) +/- 0.29 (theory) +/- 0.04 (lumi) pb. The integrated and differential cross section results are compared to predictions from several event generators.

Highlights

Measurements of top quark pair production cross sections provide crucial information for testing the standard model (SM) and the accuracy of predictions fromMonte Carlo (MC) generators
The CMS [1] and ATLAS [2] Collaborations at the CERN LHC have pprffiseffiv1⁄4iou7slayndm8eaTseuVreads the differential tt cross a function of transverse sections at momentum and other kinematic properties of the top quarks and the overall tt events [3,4,5,6,7,8,9]
These measurements use events where each parton from the top quark decay is associated with a distinct jet

Summary

INTRODUCTION

Measurements of top quark pair (tt) production cross sections provide crucial information for testing the standard model (SM) and the accuracy of predictions from. The CMS [1] and ATLAS [2] Collaborations at the CERN LHC have pprffiseffiv1⁄4iou7slayndm8eaTseuVreads the differential tt cross a function of transverse sections at momentum (pT) and other kinematic properties of the top quarks and the overall tt events [3,4,5,6,7,8,9] These measurements use events where each parton from the top quark decay is associated with a distinct jet. Differential tt cross sections are measured at the particle (parton) level as a function of the t-tagged jet (top quark) pT and y after subtracting the background contributions and correcting for inefficiencies and bin migrations. The contribution to the jet energy in data from pileup is removed using the area-based subtraction technique outlined in Ref. [32], augmented by corrections from data as a function of the jet η, as described in Ref. [31]

EVENT SELECTION

BACKGROUND

SYSTEMATIC UNCERTAINTIES

CROSS SECTION MEASUREMENTS

Maximum-likelihood fit

Integrated tt cross section measurement

Differential ttcross section measurements

Background normalization

Findings

SUMMARY

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Journal: Physical Review D	Publication Date: Oct 12, 2016
Citations: 32	License type: CC BY 3.0

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Measurement of the integrated and differentialtt¯production cross sections for high-pTtop quarks inppcollisions ats=8 TeV

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Measurement of the integrated and differentialtt¯production cross sections for high-pTtop quarks inppcollisions ats=8 TeV

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