Search for production of four top quarks in final states with same-sign or multiple leptons in proton-proton collisions at [Formula: see text] TeV

在质子-质子碰撞中，寻找在[公式：见正文] TeV 能量下，末态包含同号或多个轻子的四个顶夸克的产生。

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作者：Sirunyan,A M,Tumasyan,A,Adam,W,Ambrogi,F,Bergauer,T,Brandstetter,J,Dragicevic,M,Erö,J,Del Valle,A Escalante,Flechl,M,Frühwirth,R,Jeitler,M,Krammer,N,Krätschmer,I,Liko,D,Madlener,T,Mikulec,I,Rad,N,Schieck,J,Schöfbeck,R,Spanring,M,Spitzbart,D,Waltenberger,W,Wulz,C-E,Zarucki,M,Drugakov,V,Mossolov,V,Suarez Gonzalez,J,Darwish,M R,De Wolf,E A,Di Croce,D,Janssen,X,Lelek,A,Pieters,M,Sfar,H Rejeb,Van Haevermaet,H,Van Mechelen,P,Van Putte,S,Van Remortel,N,Blekman,F,Bols,E S,Chhibra,S S,D'Hondt,J,De Clercq,J,Lontkovskyi,D,Lowette,S,Marchesini,I,Moortgat,S,Python,Q,Skovpen,K,Tavernier,S,Van Doninck,W,Van Mulders,P,Beghin,D,Bilin,B,Brun,H,Clerbaux,B,De Lentdecker,G,Delannoy,H,Dorney,B,Favart,L,Grebenyuk,A,Kalsi,A K,Popov,A,Postiau,N,Starling,E,Thomas,L,Velde,C Vander,Vanlaer,P,Vannerom,D,Cornelis,T,Dobur,D,Khvastunov,I,Niedziela,M,Roskas,C,Trocino,D,Tytgat,M,Verbeke,W,Vermassen,B,Vit,M,Zaganidis,N,Bondu,O,Bruno,G,Caputo,C,David,P,Delaere,C,Delcourt,M,Giammanco,A,Lemaitre,V,Magitteri,A,Prisciandaro,J,Saggio,A,Marono,M Vidal,Vischia,P,Zobec,J,Alves,F L,Alves,G A,Silva,G Correia,Hensel,C,Moraes,A,Teles,P Rebello,Chagas,E Belchior Batista Das,Carvalho,W,Chinellato,J,Coelho,E,Da Costa,E M,Da Silveira,G G,De Jesus Damiao,D,De Oliveira Martins,C,De Souza,S Fonseca,Guativa,L M Huertas,Malbouisson,H,Martins,J,Figueiredo,D Matos,Jaime,M Medina,De Almeida,M Melo,Herrera,C Mora,Mundim,L,Nogima,H,Da Silva,W L Prado,Rosas,L J Sanchez,Santoro,A,Sznajder,A,Thiel,M,Manganote,E J Tonelli,De Araujo,F Torres Da Silva,Pereira,A Vilela,Bernardes,C A,Calligaris,L,Tomei,T R Fernandez Perez,Gregores,E M,Lemos,D S,Mercadante,P G,Novaes,S F,Padula,SandraS,Aleksandrov,A,Antchev,G,Hadjiiska,R,Iaydjiev,P,Misheva,M,Rodozov,M,Shopova,M,Sultanov,G,Bonchev,M,Dimitrov,A,Ivanov,T,Litov,L,Pavlov,B,Petkov,P,Fang,W,Gao,X,Yuan,L,Ahmad,M,Chen,G M,Chen,H S,Chen,M,Jiang,C H,Leggat,D,Liao,H,Liu,Z,Spiezia,A,Tao,J,Yazgan,E,Zhang,H,Zhang,S,Zhao,J,Agapitos,A,Ban,Y,Chen,G,Levin,A,Li,J,Li,L,Li,Q,Mao,Y,Qian,S J,Wang,D,Wang,Q,Hu,Z,Wang,Y,Xiao,M,Avila,C,Cabrera,A,Florez,C,Hernández,C F González,Delgado,M A Segura,Guisao,J Mejia,Alvarez,J D Ruiz,González,C A Salazar,Arbelaez,N Vanegas,Giljanović,D,Godinovic,N,Lelas,D,Puljak,I,Sculac,T,Antunovic,Z,Kovac,M,Brigljevic,V,Ceci,S,Ferencek,D,Kadija,K,Mesic,B,Roguljic,M,Starodumov,A,Susa,T,Ather,M W,Attikis,A,Erodotou,E,Ioannou,A,Kolosova,M,Konstantinou,S,Mavromanolakis,G,Mousa,J,Nicolaou,C,Ptochos,F,Razis,P A,Rykaczewski,H,Tsiakkouri,D,Finger,M,Finger,M Jr,Kveton,A,Tomsa,J,Ayala,E,Jarrin,E Carrera,Elgammal,S,Salama,E,Bhowmik,S,De Oliveira,A Carvalho Antunes,Dewanjee,R K,Ehataht,K,Kadastik,M,Raidal,M,Veelken,C,Eerola,P,Forthomme,L,Kirschenmann,H,Osterberg,K,Voutilainen,M,Garcia,F,Havukainen,J,Heikkilä,J K,Järvinen,T,Karimäki,V,Kim,M S,Kinnunen,R,Lampén,T,Lassila-Perini,K,Laurila,S,Lehti,S,Lindén,T,Luukka,P,Mäenpää,T,Siikonen,H,Tuominen,E,Tuominiemi,J,Tuuva,T,Besancon,M,Couderc,F,Dejardin,M,Denegri,D,Fabbro,B,Faure,J L,Ferri,F,Ganjour,S,Givernaud,A,Gras,P,de Monchenault,G Hamel,Jarry,P,Leloup,C,Locci,E,Malcles,J,Rander,J,Rosowsky,A,Sahin,M Ö,Savoy-Navarro,A,Titov,M,Ahuja,S,Amendola,C,Beaudette,F,Busson,P,Charlot,C,Diab,B,Falmagne,G,de Cassagnac,R Granier,Kucher,I,Lobanov,A,Perez,C Martin,Nguyen,M,Ochando,C,Paganini,P,Rembser,J,Salerno,R,Sauvan,J B,Sirois,Y,Zabi,A,Zghiche,A,Agram,J-L,Andrea,J,Bloch,D,Bourgatte,G,Brom,J-M,Chabert,E C,Collard,C,Conte,E,Fontaine,J-C,Gelé,D,Goerlach,U,Jansová,M,Bihan,A-C Le,Tonon,N,Van Hove,P,Gadrat,S,Beauceron,S,Bernet,C,Boudoul,G,Camen,C,Carle,A,Chanon,N,Chierici,R,Contardo,D,Depasse,P,Mamouni,H El,Fay,J,Gascon,S,Gouzevitch,M,Ille,B,Jain,Sa,Lagarde,F,Laktineh,I B,Lattaud,H,Lesauvage,A,Lethuillier,M,Mirabito,L,Perries,S,Sordini,V,Torterotot,L,Touquet,G,Donckt,M Vander,Viret,S,Khvedelidze,A,Tsamalaidze,Z,Autermann,C,Feld,L,Kiesel,M K,Klein,K,Lipinski,M,Meuser,D,Pauls,A,Preuten,M,Rauch,M P,Schulz,J,Teroerde,M,Wittmer,B,Albert,A,Erdmann,M,Fischer,B,Ghosh,S,Hebbeker,T,Hoepfner,K,Keller,H,Mastrolorenzo,L,Merschmeyer,M,Meyer,A,Millet,P,Mocellin,G,Mondal,S,Mukherjee,S,Noll,D,Novak,A,Pook,T,Pozdnyakov,A,Quast,T,Radziej,M,Rath,Y,Reithler,H,Roemer,J,Schmidt,A,Schuler,S C,Sharma,A,Wiedenbeck,S,Zaleski,S,Flügge,G,Ahmad,W Haj,Hlushchenko,O,Kress,T,Müller,T,Nehrkorn,A,Nowack,A,Pistone,C,Pooth,O,Roy,D,Sert,H,Stahl,A,Martin,M Aldaya,Asmuss,P,Babounikau,I,Bakhshiansohi,H,Beernaert,K,Behnke,O,Martínez,A Bermúdez,Bertsche,D,Anuar,A A Bin,Borras,K,Botta,V,Campbell,A,Cardini,A,Connor,P,Rodríguez,S Consuegra,Contreras-Campana,C,Danilov,V,De Wit,A,Defranchis,M M,Pardos,C Diez,Damiani,D Domínguez,Eckerlin,G,Eckstein,D,Eichhorn,T,Elwood,A,Eren,E,Gallo,E,Geiser,A,Grohsjean,A,Guthoff,M,Haranko,M,Harb,A,Jafari,A,Jomhari,N Z,Jung,H,Kasem,A,Kasemann,M,Kaveh,H,Keaveney,J,Kleinwort,C,Knolle,J,Krücker,D,Lange,W,Lenz,T,Leonard,J,Lidrych,J,Lipka,K,Lohmann,W,Mankel,R,Melzer-Pellmann,I-A,Meyer,A B,Meyer,M,Missiroli,M,Mittag,G,Mnich,J,Mussgiller,A,Myronenko,V,Adán,D Pérez,Pflitsch,S K,Pitzl,D,Raspereza,A,Saibel,A,Savitskyi,M,Scheurer,V,Schütze,P,Schwanenberger,C,Shevchenko,R,Singh,A,Tholen,H,Turkot,O,Vagnerini,A,Van De Klundert,M,Walsh,R,Wen,Y,Wichmann,K,Wissing,C,Zenaiev,O,Zlebcik,R,Aggleton,R,Bein,S,Benato,L,Benecke,A,Blobel,V,Dreyer,T,Ebrahimi,A,Feindt,F,Fröhlich,A,Garbers,C,Garutti,E,Gonzalez,D,Gunnellini,P,Haller,J,Hinzmann,A,Karavdina,A,Kasieczka,G,Klanner,R,Kogler,R,Kovalchuk,N,Kurz,S,Kutzner,V,Lange,J,Lange,T,Malara,A,Multhaup,J,Niemeyer,C E N,Perieanu,A,Reimers,A,Rieger,O,Scharf,C,Schleper,P,Schumann,S,Schwandt,J,Sonneveld,J,Stadie,H,Steinbrück,G,Stober,F M,Vormwald,B,Zoi,I,Akbiyik,M,Barth,C,Baselga,M,Baur,S,Berger,T,Butz,E,Caspart,R,Chwalek,T,De Boer,W,Dierlamm,A,El Morabit,K,Faltermann,N,Giffels,M,Goldenzweig,P,Gottmann,A,Harrendorf,M A,Hartmann,F,Husemann,U,Katkov,I,Kudella,S,Mitra,S,Mozer,M U,Müller,D,Müller,Th,Musich,M,Nürnberg,A,Quast,G,Rabbertz,K,Schröder,M,Shvetsov,I,Simonis,H J,Ulrich,R,Wassmer,M,Weber,M,Wöhrmann,C,Wolf,R,Anagnostou,G,Asenov,P,Daskalakis,G,Geralis,T,Kyriakis,A,Loukas,D,Paspalaki,G,Diamantopoulou,M,Karathanasis,G,Kontaxakis,P,Manousakis-Katsikakis,A,Panagiotou,A,Papavergou,I,Saoulidou,N,Stakia,A,Theofilatos,K,Vellidis,K,Vourliotis,E,Bakas,G,Kousouris,K,Papakrivopoulos,I,Tsipolitis,G,Evangelou,I,Foudas,C,Gianneios,P,Katsoulis,P,Kokkas,P,Mallios,S,Manitara,K,Manthos,N,Papadopoulos,I,Strologas,J,Triantis,F A,Tsitsonis,D,Bartók,M,Chudasama,R,Csanad,M,Major,P,Mandal,K,Mehta,A,Nagy,M I,Pasztor,G,Surányi,O,Veres,G I,Bencze,G,Hajdu,C,Horvath,D,Sikler,F,Vámi,T,Veszpremi,V,Vesztergombi,G,Beni,N,Czellar,S,Karancsi,J,Makovec,A,Molnar,J,Szillasi,Z,Raics,P,Teyssier,D,Trocsanyi,Z L,Ujvari,B,Csorgo,T,Metzger,W J,Nemes,F,Novak,T,Choudhury,S,Komaragiri,J R,Tiwari,P C,Bahinipati,S,Kar,C,Kole,G,Mal,P,Bindhu,V K Muraleedharan Nair,Nayak,A,Sahoo,D K,Swain,S K,Bansal,S,Beri,S B,Bhatnagar,V,Chauhan,S,Chawla,R,Dhingra,N,Gupta,R,Kaur,A,Kaur,M,Kaur,S,Kumari,P,Lohan,M,Meena,M,Sandeep,K,Sharma,S,Singh,J B,Virdi,A K,Walia,G,Bhardwaj,A,Choudhary,B C,Garg,R B,Gola,M,Keshri,S,Kumar,Ashok,Malhotra,S,Naimuddin,M,Priyanka,P,Ranjan,K,Shah,Aashaq,Sharma,R,Bhardwaj,R,Bharti,M,Bhattacharya,R,Bhattacharya,S,Bhawandeep,U,Bhowmik,D,Dutta,S,Ghosh,S,Maity,M,Mondal,K,Nandan,S,Purohit,A,Rout,P K,Saha,G,Sarkar,S,Sarkar,T,Sharan,M,Singh,B,Thakur,S,Behera,P K,Kalbhor,P,Muhammad,A,Pujahari,P R,Sharma,A,Sikdar,A K,Dutta,D,Jha,V,Kumar,V,Mishra,D K,Netrakanti,P K,Pant,L M,Shukla,P,Aziz,T,Bhat,M A,Dugad,S,Mohanty,G B,Sur,N,Verma,RavindraKumar,Banerjee,S,Bhattacharya,S,Chatterjee,S,Das,P,Guchait,M,Karmakar,S,Kumar,S,Majumder,G,Mazumdar,K,Sahoo,N,Sawant,S,Chauhan,S,Dube,S,Hegde,V,Kansal,B,Kapoor,A,Kothekar,K,Pandey,S,Rane,A,Rastogi,A,Sharma,S,Chenarani,S,Tadavani,E Eskandari,Etesami,S M,Khakzad,M,Najafabadi,M Mohammadi,Naseri,M,Hosseinabadi,F Rezaei,Felcini,M,Grunewald,M,Abbrescia,M,Aly,R,Calabria,C,Colaleo,A,Creanza,D,Cristella,L,De Filippis,N,De Palma,M,Di Florio,A,Fiore,L,Gelmi,A,Iaselli,G,Ince,M,Lezki,S,Maggi,G,Maggi,M,Miniello,G,My,S,Nuzzo,S,Pompili,A,Pugliese,G,Radogna,R,Ranieri,A,Selvaggi,G,Silvestris,L,Simone,F M,Venditti,R,Verwilligen,P,Abbiendi,G,Battilana,C,Bonacorsi,D,Borgonovi,L,Braibant-Giacomelli,S,Campanini,R,Capiluppi,P,Castro,A,Cavallo,F R,Ciocca,C,Codispoti,G,Cuffiani,M,Dallavalle,G M,Fabbri,F,Fanfani,A,Fontanesi,E,Giacomelli,P,Grandi,C,Guiducci,L,Iemmi,F,Lo Meo,S,Marcellini,S,Masetti,G,Navarria,F L,Perrotta,A,Primavera,F,Rossi,A M,Rovelli,T,Siroli,G P,Tosi,N,Albergo,S,Costa,S,Di Mattia,A,Potenza,R,Tricomi,A,Tuve,C,Barbagli,G,Cassese,A,Ceccarelli,R,Ciulli,V,Civinini,C,D'Alessandro,R,Focardi,E,Latino,G,Lenzi,P,Meschini,M,Paoletti,S,Sguazzoni,G,Viliani,L,Benussi,L,Bianco,S,Piccolo,D,Bozzo,M,Ferro,F,Mulargia,R,Robutti,E,Tosi,S,Benaglia,A,Beschi,A,Brivio,F,Ciriolo,V,Di Guida,S,Dinardo,M E,Dini,P,Gennai,S,Ghezzi,A,Govoni,P,Guzzi,L,Malberti,M,Malvezzi,S,Menasce,D,Monti,F,Moroni,L,Paganoni,M,Pedrini,D,Ragazzi,S,de Fatis,T Tabarelli,Zuolo,D,Buontempo,S,Cavallo,N,De Iorio,A,Di Crescenzo,A,Fabozzi,F,Fienga,F,Galati,G,Iorio,A O M,Lista,L,Meola,S,Paolucci,P,Rossi,B,Sciacca,C,Voevodina,E,Azzi,P,Bacchetta,N,D Bisello,D,Boletti,A,Bragagnolo,A,Carlin,R,Checchia,P,De Castro Manzano,P,Dorigo,T,Dosselli,U,Gasparini,F,Gasparini,U,Gozzelino,A,Hoh,S Y,Lujan,P,Margoni,M,Meneguzzo,A T,Pazzini,J,Presilla,M,Ronchese,P,Rossin,R,Simonetto,F,Tiko,A,Tosi,M,Zanetti,M,Zotto,P,Zumerle,G,Braghieri,A,Fiorina,D,Montagna,P,Ratti,S P,Re,V,Ressegotti,M,Riccardi,C,Salvini,P,Vai,I,Vitulo,P,Biasini,M,Bilei,G M,Ciangottini,D,Fanò,L,Lariccia,P,Leonardi,R,Mantovani,G,Mariani,V,Menichelli,M,Rossi,A,Santocchia,A,Spiga,D,Androsov,K,Azzurri,P,Bagliesi,G,Bertacchi,V,Bianchini,L,Boccali,T,Castaldi,R,Ciocci,M A,Dell'Orso,R,Fedi,G,Giannini,L,Giassi,A,Grippo,M T,Ligabue,F,Manca,E,Mandorli,G,Messineo,A,Palla,F,Rizzi,A,Rolandi,G,Chowdhury,S Roy,Scribano,A,Spagnolo,P,Tenchini,R,Tonelli,G,Turini,N,Venturi,A,Verdini,P G,Cavallari,F,Cipriani,M,Del Re,D,Di Marco,E,Diemoz,M,Longo,E,Marzocchi,B,Meridiani,P,Organtini,G,Pandolfi,F,Paramatti,R,Quaranta,C,Rahatlou,S,Rovelli,C,Santanastasio,F,Soffi,L,Amapane,N,Arcidiacono,R,Argiro,S,Arneodo,M,Bartosik,N,Bellan,R,Bellora,A,Biino,C,Cappati,A,Cartiglia,N,Cometti,S,Costa,M,Covarelli,R,Demaria,N,Kiani,B,Mariotti,C,Maselli,S,Migliore,E,Monaco,V,Monteil,E,Monteno,M,Obertino,M M,Ortona,G,Pacher,L,Pastrone,N,Pelliccioni,M,Angioni,G L Pinna,Romero,A,Ruspa,M,Salvatico,R,Sola,V,Solano,A,Soldi,D,Staiano,A,Belforte,S,Candelise,V,Casarsa,M,Cossutti,F,Da Rold,A,Della Ricca,G,Vazzoler,F,Zanetti,A,Kim,B,Kim,D H,Kim,G N,Lee,J,Lee,S W,Moon,C S,Oh,Y D,Pak,S I,Sekmen,S,Son,D C,Yang,Y C,Kim,H,Moon,D H,Oh,G,Francois,B,Kim,T J,Park,J,Cho,S,Choi,S,Go,Y,Gyun,D,Ha,S,Hong,B,Lee,K,Lee,K S,Lim,J,Park,J,Park,S K,Roh,Y,Yoo,J,Goh,J,Kim,H S,Almond,J,Bhyun,J H,Choi,J,Jeon,S,Kim,J,Kim,J S,Lee,H,Lee,K,Lee,S,Nam,K,Oh,M,Oh,S B,Radburn-Smith,B C,Yang,U K,Yoo,H D,Yoon,I,Yu,G B,Jeon,D,Kim,H,Kim,J H,Lee,J S H,Park,I C,Watson,I J,Choi,Y,Hwang,C,Jeong,Y,Lee,J,Lee,Y,Yu,I,Veckalns,V,Dudenas,V,Juodagalvis,A,Tamulaitis,G,Vaitkus,J,Ibrahim,Z A,Idris,F Mohamad,Abdullah,W A T Wan,Yusli,M N,Zolkapli,Z,Benitez,J F,Hernandez,A Castaneda,Quijada,J A Murillo,Palomo,L Valencia,Castilla-Valdez,H,De La Cruz-Burelo,E,La Cruz,I Heredia-De,Lopez-Fernandez,R,Sanchez-Hernandez,A,Moreno,S Carrillo,Barrera,C Oropeza,Ramirez-Garcia,M,Valencia,F 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期刊：European Physical Journal C影响因子：4.800
时间：2020起止号：2020;80(2):75
doi：10.1140/epjc/s10052-019-7593-7

Abstract

The standard model (SM) production of four top quarks ( tt¯tt¯ ) in proton-proton collisions is studied by the CMS Collaboration. The data sample, collected during the 2016-2018 data taking of the LHC, corresponds to an integrated luminosity of 137 fb-1 at a center-of-mass energy of 13 TeV . The events are required to contain two same-sign charged leptons (electrons or muons) or at least three leptons, and jets. The observed and expected significances for the tt¯tt¯ signal are respectively 2.6 and 2.7 standard deviations, and the tt¯tt¯ cross section is measured to be 12.6-5.2+5.8 fb . The results are used to constrain the Yukawa coupling of the top quark to the Higgs boson, yt , yielding a limit of |yt/ytSM| < 1.7 at 95% confidence level, where ytSM is the SM value of yt . They are also used to constrain the oblique parameter of the Higgs boson in an effective field theory framework, H^ < 0.12 . Limits are set on the production of a heavy scalar or pseudoscalar boson in Type-II two-Higgs-doublet and simplified dark matter models, with exclusion limits reaching 350-470 GeV and 350-550 GeV for scalar and pseudoscalar bosons, respectively. Upper bounds are also set on couplings of the top quark to new light particles.

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