Measurement of the sum of WW and WZ production with W+dijet events in pp collisions at [Formula: see text

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Walsh,K S Lee,G Lungu,P Sharp,Z Demiragli,R Y Zhu,S Gollapinni,J Alexander,T Rovelli,T J Mertzimekis,K Sogut,F Fassi,G Breto,A Spiezia,M Dittmar,L Wendland,Th Müller,I Suarez,P Wittich,P Gras,P Lariccia,C Mesropian,P Vanlaer,S Chang,J Pazzini,H Held,S J Qian,L N Vergili,J Hauser,A Singovsky,F Micheli,S Ragazzi,P Tan,T Martins,J Wetzel,M Sasseville,P Juillot,M Kress,B Snook,S R Wagner,J Mnich,J Ellison,K F Johnson,M Takahashi,Y Kubota,I Svintradze,F Yang,S Stoynev,C Hackstein,I Vorobiev,H Sakulin,M Voutilainen,C Asawatangtrakuldee,I N Naranjo,D Gelé,P Katsas,M Ruspa,A Tiko,C Neu,E Di Marco,M Schröder,M Bontenackels,U Joshi,P T Cox,D J Hofman,E Petrakou,D Fehling,H Kirschenmann,A Taurok,A Panagiotou,S Erhan,I M Anghel,P Kreuzer,M Stoye,P Nef,B R Drell,V Azzolini,D Abbaneo,T Bolton,M A Buchmann,P De Barbaro,M Girone,S Xie,V Dero,D Benedetti,F Simonetto,T S Anjos,V Maroussov,M Cardaci,A Whitbeck,M Musich,P E Karchin,P Traczyk,S Sala,D Fasanella,H Schettler,L Bianchini,M Segala,R Kelley,M 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Scodellaro,A Solano,S Somalwar,M Margoni,G Flucke,M Djordjevic,M Finger,M Sharan,K Bloom,M Grothe,M Naimuddin,D Lazic,A K Mohanty,R M Harris,M Kazana,P Kyberd,F Hoehle,C Ferro,H Arfaei,A Hinzmann,L Bäni,M Rodenburg,M Hansen,A Sakharov,J Seixas,F Fabbri,B Mathias,M Deniz,S Belforte,Y Ivanov,T Schum,J Linacre,R Hughes,J Caudron,A Pashenkov,M Goncharov,M Schmitt,Y Maravin,G Organtini,A Zhokin,K Pedro,A Uzunian,F Ptochos,D Green,J G Branson,C Nuttens,J Zhang,J L Faure,A Kropivnitskaya,J Erö,S Tuo,R Schöfbeck,F M Stober,W H Smith,D Martschei,P Chang,M Sigamani,Y Fu,G Cerminara,M Makouski,A Heikkinen,M Rovere,C Biino,A Melo,T Whyntie,A C Mignerey,S Thüer,L Sgandurra,T Karaman,O Novgorodova,C Broutin,M Hashemi,D Montanino,P Bargassa,E Kuznetsova,T Kamon,M Tadel,N Mccoll,J Y Kim,S Song,W T Ford,B L Winer,A H Ball,T Hreus,L Masetti,G Bolla,A Zuranski,A Karjalainen,F Gasparini,M Nguyen,M Niegel,E M Da Costa,E A De Wolf,M Szleper,T Camporesi,D Liang,M Walker,J Sibille,W.-S Hou,X Wan,S Sumowidagdo,L Apanasevich,A Belyaev,E Castro,P Schleper,L M Lebolo,R Frazier,G Zumerle,A Papageorgiou,I Redondo,K Rose,V E Bazterra,P Harris,Y S Chung,M E Dinardo,S C Eno,M Hollingsworth,M A Reyes-Santos,A Descroix,M Sani,J Gronberg,V Gaultney,G Bruno,C R Newsom,S Di Guida,M Fisher,V Mossolov,M Grassi,S Habib,X Janssen,E Brownson,S Marcellini,A T Serban,V Knünz,S Girgis,C Markou,A Rose,M Yang,L Kreczko,L Rebane,M E Pol,S Spanier,C Boulahouache,S Vavilov,R Remington,M Costa,M Gouzevitch,R Travaglini,W Behrenhoff,N Magini,D Dutta,F Palmonari,L Perrozzi,B Frisch,A Vorobyev,P H Butler,T Dorigo,H D Yoo,G Hu,R K Shivpuri,H Rohringer,P Depasse,P Geffert,G Kukartsev,P Bartalini,M Della Negra,W Martin,S Liang,D Winn,J C Yun,D Colling,R Clare,R A Ofierzynski,G Broccolo,M Weber,H Vogel,B W Kennedy,S Qazi,R Wilkinson,J Yelton,W De Boer,D M Morse,J Callner,G Christopher,N Amapane,P Turner,F.-P Schilling,B Hegner,P Sauerland,M Eads,B Calvert,F Palla,K Öcalan ,D Wood,J Hanlon,D Gigi,K Klapoetke,W Haj 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Laganá ,A Morelos Pineda ,W Lohmann,T Hauth,M D’Alfonso,M Chertok,M Giffels,V Konoplyanikov,S Sanders,P Gunnellini,D Cline,A A Ocampo Rios ,G Quast,A Rácz ,A Branca,S Rahatlou,R Gomez-Reino Garrido ,C Bernet,T Bergauer,Y Sirois,M Mannelli,M Diemoz,Jesús Puerta Pelayo ,Y Gershtein,E Migliore,G Zito,P Adžić ,V M Ghete,A Perrotta,C Dragoiu,K Beernaert,S Çerçi ,R López-Fernández ,Andreas Bernhard Meyer ,Ashok Kumar ,C Oʼbrien ,M W Arenton,M Felcini,S Maselli,K Kaadze,C Heidemann,N Valls,A Ledovskoy,C Foudas,S Ochesanu,E Aguiló ,A Castro,A Staiano,L Antonelli,S Paramesvaran,F Primavera,G Hamel De Monchenault ,M Galanti,A Heister,S Carrillo Moreno ,D Renker,V Kumar,R Hadjiiska,G A Pierro,S Đurić ,R Ryutin,J Thom,M Choi,D H Miller,В Качанов ,J Molnár ,T Lampén,D H Kim,F Ferri,R Stone,J Hirschauer,E Kwon,D M Raymond,L Soares Jorge ,U Heintz,M Mohammadi Najafabadi ,F Moortgat,Y W Chang,S Perriès ,C Kottachchi Kankanamge Don ,А Спиридонов ,A Safonov,D Ferenček ,N Eggert,C Justus,K Buńkowski ,R T 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Rodriguez,M Kaur,D Hidas,L Uvarov,H Weber,S Shrestha,P Levchenko,P Vischia,C Ávila ,M Souza ,M Meschini,G Daskalakis,I Papadopoulos,E Boos,J Erfle,M Mulders,X Wang,C Schäfer,M Grünewald ,G Iaselli,D J A Cockerill,S Luyckx,N Lychkovskaya,R Carlin,D Pellett,P M Ribeiro Cipriano ,R Venditti,C E Gerber,C Grandi,A Geiser,A Luthra,P R Hobson,D Carlsmith,M Ćwiok ,B Mangano,K Petridis,P Moisenz,W Erdmann,G Nicolas Kaufman ,N Neumeister,J Merz,M Peruzzi,K Kovitanggoon,F Pauß ,T Boccali,L Barone,A Leonidov,A Schmidt,A Avetisyan,D Lopes Pegna ,S F Novaes,M Maes,J A Coarasa Perez ,J Alcaraz Maestre ,A Sznajder,R Fischer,M Azarkin,A Graziano,P Bortignon,G Vesztergombi,J Lange,J Malclès ,W Johns,T Y Kim,L Vanelderen,D Konstantinov,B Calpas,D Creanza,R Rusack,D Troendle,I Yu,M Kadastik,L Spiegel,I González Caballero ,L Lloret Iglesias ,A Perloff,A Lopez Virto ,E Sexton-Kennedy,M Titov,C Charlot,M Chasco,M Zeinali,T Khurshid,W D Zeuner,F Thyssen,P Milenović ,V Cherepanov,A Rýd ,J Luetic,L Quertenmont,L Gauthier,D Lange,N Skhirtladze,S Folgueras,S Sekmen,A V Gritsan,G I Veres,J P Fernández Ramos ,Eric Wayne Vaandering ,L Lista,M Seidel,J Rohlf,C Fantasia,D Rathjens,W Lin,C Tuvé ,C Contreras-Campana,P Lenzi,F Giordano,E Palencia Cortezon ,V Bhatnagar,E Eşkut ,C Newman-Holmes,Р Тенчини ,A Petrilli,D H Moon,A Barker,B Akgün ,R Granier De Cassagnac ,R Montalvo,C Hill,A Kopecký ,I P J Shipsey ,V Hagopian,A Juodagalvis,C Veelken,J Suarez Gonzalez ,F Ricci-Tam,D Horváth ,T Peiffer,A Ruiz-Jimeno,A Martelli,C Favaro,J Velkovska,N Pozzobon,Eric Christian Chabert ,E Luiggi Lopez ,J Berger,A Cimmino,J Królikowski ,G Cappello,F Meijers,M Tosi,A Kyriakis,C Seitz,K Nawrocki,M Aldaya Martin ,J Flix,D Lincoln,Н Голубев ,J P Gomez,O Bondu,M S Rudolph ,E Longo,O Evdokimov,P Baillon,J Hugon,Kevin Frederick Siehl ,D Petyt,R Ulrich,F Glege,C Henderson,S Dasu,N Odell,L Guiducci,D Duchardt,J R Smith ,J M Marraffino,R Horisberger,I Bayshev,D Krücker,D Wang,P Govoni,H J Simonis,Andreas Oehler ,G Garcı́a ,R Castaldi,S A Koay,T Aliev,A Custódio,D Ryckbosch,Ž Antunović ,J Damgov,F Chlebana,L Cremaldi ,R.-S Lu,W Wu,M Friedl,A Pozdnyakov,F Stöckli,F Blekman,J H Kim,B Dahmes,J Butt,D Kotliński ,L Teodorescu,A Delgado Peris ,J Pálinkás ,D M Newbold,C Y Lin ,D Klingebiel,F Santanastasio,B Ujvári ,M Bachtis,F Özok ,M Dalchenko,E Schlieckau,D Pedrini,K Sung,E Karavakis,N Godinović ,A Volodko,L Moroni,P Rumerio,M Besançon ,A Colaleo,M Gallinaro,J Andreä ,L Martini,S Ganguly,Adrian P Hunt ,M Ekmedžić ,V Golovtsov,D Spiga,D Mason,V Lemaı̂tre ,A Brinkerhoff,A López ,M Herndon,S Schnetzer,S Tosi,Y Ma,S Mrenna,A Çakır ,A Montanari,M Ivova Rikova ,N Wickramage,A Zarubin,M Grimes,S Dutta,В Сулимов ,Y M Tzeng,C Albajar,D Bourilkov,J Duarte,N Colino,I Heredia-De La Cruz ,F Cavallari,A Ghezzi,H W K Cheung,T J Kim,Y Mao,Thomas Hermanns ,P Busson,M Perfilov,C Paus,A Schizzi,L Muñiz ,M Zanetti,V Dutta,J Zabel,A Santocchia,M Chamizo Llatas ,M Hohlmann,T Lindén,F Fiori,M Spiropulu,M Gardner,S Lee,N 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Carvalho,K Maeshima,L Benhabib,M Paganoni,E Vlasov,M Vergili,A Pin,M Kaya,N Cripps,R Chierici,G Mesyats,A G Delannoy,Y Chen,V D Elvira,J Leonard,M J Kortelainen,A Attikis,L Mundim,V J Smith,D Ćutts ,P Maksimović ,S Salur,N Beaupère ,I Shreyber-Tecker ,I Puljak,S Casasso,A García-Bellido ,P Baringer,P Kurt,C Calabria,M Olschewski,Z Szillási ,B Gomez Moreno ,F Vazquez Valencia ,C Autermann,P Merkel,D Trocino,B Blumenfeld,J Fulcher,T R Fernandez Perez Tomei ,T Frueboes,L Felď ,P Paganini,M Snowball,V Candelise,B Bylsma,B K Heltsley ,G Brona,S Morovic,T Sakuma,D Domínguez Vázquez ,K Kanishchev,J.-P Merlo,M Dubinin,D Pagano,K Krajczár ,D Gyun,O Doğangün ,X Shi,A Mussgiller,I Smirnov,E Contreras-Campana,T Ferbel,M Marone,B Francis,J S Wood,B Casal,I Chakaberia,S Malik,L M Villaseñor-Cendejas ,J Salfeld-Nebgen,A Santoro,A Beretvas,D De Jesus Damiao ,M Selvaggi,A Adıgüzel ,M N Bakirci,M Pierini,J Hrubec,G Eckerlin,Α Μάρκου ,Diego Matos Figueiredo ,H A Weber,K Lannon,A Dabrowski,Z L Trócsányi ,K Mishra,A M Sirunyan,V Andreev,S Ganjour,J Fernández Menéndez ,O Mall,I Hoş ,J Goh,N Marinelli,L Borrello,R Redjimi,M Malek,A Gaz,A F Osório Oliveros ,A Tumasyan,J Mccartin,G Auzinger,J A Gómez ,A Polatöz ,V Gavrilov,W To,G Singh,E Focardi,F J Munoz Sanchez ,P Verwilligen,S Greene,M Correa Martins ,S Paktinat Mehdiabadi ,B Millán Mejías ,R Gonzalez Suarez ,L A T Bauerdick,M Vutova,A Kalogeropoulos,A Calderón ,K Cankoçak ,L M Pant,F Beaudette,D Barge,R D’Alessandro,S Colafranceschi,A Gurrola,R Bellan,W Waltenberger,C Vander Velde ,V Stolin,J Freeman,O Hindrichs,C Nicolaou,D Krofcheck,S Troshin,N Redaelli,J Hollar,C Hajdú ,B Dorney,G Wrochna,P Lobelle Pardo ,A Güth,P Checchia,Fırat Duru ,F Ligabue,I Volobouev,J G Bian,J M Hernández ,D Stuart,E Avdeeva,P Avery,P Lecomte,S Nourbakhsh,S Buontempo,J Rander,S Rappoccio,P Sphicas,M S Soares,R Harr,S Khalil,E Halkiadakis,E Laird,S Başeğmez ,M Wayne,T Virdee,E Barberis,J Goldstein,W Busza,P Martínez Ruiz Del Arbol ,M Chen,C De Oliveira Martins 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Albrow,J S Werner,A Nowack

doi:10.1140/epjc/s10052-013-2283-3

Abstract

A measurement of the inclusive WW+WZ diboson production cross section in proton–proton collisions is reported, based on events containing a leptonically decaying W boson and exactly two jets. The data sample, collected at sqrt{s} = 7~mbox{TeV} with the CMS detector at the LHC, corresponds to an integrated luminosity of 5.0 fb−1. The measured value of the sum of the inclusive WW and WZ cross sections is σ(pp→WW+WZ)=68.9±8.7 (stat.)±9.7 (syst.)±1.5 (lum.) pb, consistent with the standard model prediction of 65.6±2.2 pb. This is the first measurement of WW+WZ production in pp collisions using this signature. No evidence for anomalous triple gauge couplings is found and upper limits are set on their magnitudes.

Highlights

The gauge symmetry of the standard model (SM) fixes the triple gauge boson couplings that determine the selfinteractions of W and Z bosons
Observation of anomalous triple gauge boson couplings would be an indication of physics beyond the SM
We report the first measurement of WW+WZ diboson production in pp collisions in the semileptonic final state at the Large Hadron Collider (LHC), where one W boson decays leptonically ( ν, with = e, μ) while the other boson (W or Z) decays hadronically, giving rise to two energetic jets in the final state

Summary

MC tt Single top

Unconstrained 31.3 pb ± 5 % (NLO) [30] 163 pb ± 7 % (NLO) [31] 85 pb ± 5 % (NNLL) [32,33,34] 3.05 pb ± 4.3 % (NNLO) [35] ETmiss fit in data the same distribution after subtracting all SM contributions from data except for WW+WZ events. We generate the mjj pseudo-data for the SM processes, taking into account the correlations between the yields, and perform a fit to each pseudo-data mjj distribution The results for both the muon and electron channels indicate that there is a small bias (−8.6 % and −6.6 %) in the WW+WZ yield, corresponding to less than 0.4 standard deviations, and that the fit slightly overestimates the uncertainty on the yield. We observe 2700 ± 340 (stat.) ± 360 (syst.) WW+WZ events, in agreement with the SM expectation This result corresponds to a significance of 8.8 standard deviations when computed using a simple likelihood ratio [39], where the background yield uncertainties (Table 2) and errors on α, β (Eq (1)) are fixed to their fitted values. Data Fit χ 2/Ndof (probability) Acceptance × efficiency (Aε) Expected WW+WZ yield from simulation

Electron channel

CMS muon identification in Physics Analysis Summary

Findings

The CMS Collaboration