Study of quark and gluon jet substructure in Z+jet and dijet events from pp collisions

A A Bin Anuar,A Abreu,A Bodek,A Bornheim,A Bragagnolo,A Calderón ,A Da Rold,A Delgado Peris,A Di Mattia,A Escalante Del Valle,A García-Bellido ,A Gurtu,A Manousakis-Katsikakis,A N Yushkov ,A Novák ,A Polatöz ,A Rinkevičius ,A Rácz ,A Rýd ,A Samalan,A Scribano,A Sánchez ,A Vagnerini,A Vilela Pereira,A Çakır ,Aashaq Shah ,Abanti Ranadhir Sahasransu ,Abbas Hassani ,Abhirami Harilal ,Abhishek Das ,Alberto Orso Maria Iorio ,Alberto Sánchez Hernández ,Alessandro Tarabini ,Alfredo Castaneda Hernandez ,Allison Reinsvold Hall ,Alpana Alpana ,Amandeep Singh Bakshi ,Andres Mateus Vargas Hernandez ,Andrey Popov ,Ang Li ,Anna Henckel Merritt ,Anna Tsatsos ,Anne-Catherine Le Bihan ,Antonello Pellecchia ,Antonio Cassese ,Antonio María Pérez-Calero Yzquierdo ,Arnab Laha ,Arun Kumar ,Arun Muthirakalayil Madhu ,Ashish Sehrawat ,Ashok Kumar ,Ashraf Mohamed ,Attila József Rádl ,Austin Townsend ,B Akgün ,B B Tannenwald ,B Işıldak ,B Mcmaster,B Ristić ,B Tali,B Ujvári ,B Wysłouch ,B Álvarez González ,Balaji Venkat Sathia Narayanan ,Beatriz Ribeiro Lopes ,Benjamin Charles Radburn-Smith ,Bingran Wang ,Bobae Kim ,Byung Hun Oh ,C Fernandez Bedoya ,C Hajdú ,C Işik ,C Martin Perez,C Martínez Rivero ,C Mora Herrera,C Peña ,C Schwanenberger,C Tuvé ,C Vander Velde,C Ávila ,Camilo Andrés Carrillo Montoya ,Carlos Pérez Dengra ,Charlotte Cooke ,Chiara Aimè ,Chia‐Ming Kuo ,Christina Wang ,Christopher Mcgrady ,Christopher T Hill ,Chuyuan Liu ,Cilicia Uzziel Perez ,Claire Savard ,Claudia-Elisabeth Wulz ,D Blöch ,D De Jesus Damiao,D Di Croce,D Ferenček ,D Giljanović ,D Horváth ,D Kotliński ,D Soldi,D Ćutts ,Dan Green ,Daniel Diaz ,Daniel Tapia Takaki ,David Gabriel Monk ,Dayong Wang ,Deshitha Chamikara Wickramarathna Dhammage ,Diego Matos Figueiredo ,Diwakar Vats ,Dmitrii Kirpichnikov ,Dominic Stafford ,Dong Hee Kim ,Doyeong Kim ,Drew Baden ,Dylan Lutton ,E Carrera Jarrin,E Clément ,E De La Cruz-Burelo,E Di Marco,E Eşkut ,E Palencia Cortezón ,E Pérez ,Emine Gurpinar Guler ,Eric Christian Chabert ,Eric Wayne Vaandering ,Evan Koenig ,F Canelli ,F Colombina ,F Dölek ,F Nessi‐Tedaldi ,F Pauß ,F Ramírez ,F Siklér ,F Simonetto,F Vazzoler,Federica Maria Simone ,Fengwangdong Zhang ,Florian Eble ,Francesca Maria Addesa ,Francesco Carnevali ,Francisco Ignacio Garcia Fuentes ,Franz Glessgen ,Fuqiang Wang ,G Bauer,G De Lentdecker,G Della Ricca,G G Da Silveira,G Gómez ,G Köpp ,G Martı́nez ,G Mäggi ,G P Siroli,G P Van Onsem,G Paspalaki,G Pásżtor ,G W Wilson ,G Önengüt ,Gavin Davies ,Geetanjali Chaudhary ,George Stephans ,George Wei-Shu Hou ,Gian Luca Pinna Angioni ,Gilson Correia Silva ,Grace Haza ,Gui Nyun Kim ,Guillelmo Gomez Ceballos ,Guillermo Reales Gutiérrez ,Guo-Ming Chen ,Gurpreet Singh Chahal ,H Aarup Petersen ,H Białkowska ,H Castilla‐Valdez ,H El Mamouni,H Flächer ,H J Simonis ,H Malbouisson ,H Oğul ,H Sert,Haneol Lee ,Hannsjoerg Artur Weber ,Hans-Christian Kaestli ,Hanwen Wang ,Harry Cheung ,He He ,He-Sheng Chen ,Heewon Lee ,Hesham El Faham ,Hevjin Yarar ,Hsin-Yeh Wu ,Huaqiao Zhang ,Hui Wang ,Humberto Antonio Salazar Ibarguen ,Hyunchul Kim ,Hyunsoo Kim ,Hyunyong Kim ,I Babounikau,I De Bruyn,I Dumanoğlu ,I González Caballero ,I Hoş ,Ian Reed ,Ilia Zhizhin ,Imad Baptiste Laktineh ,Inkyu Park ,J A Wilson ,J Alcaraz Maestre,J Andreä ,J Fernández Menéndez ,J Kašpar ,J Królikowski ,J Königsberg ,J L Dulemba,J M Hernández ,J Malclès ,J Milošević ,J Molnár ,J Piedra Gomez,J Puerta Pelayo,J R Gonźalez Ferńandez ,J S Bonilla ,J Thieman,J W Gary,J Wanćzyk ,Jaebeom Park ,Jaehoon Lim ,James Sheplock ,Jan Van Der Linden ,Jan-Ole Gosewisch ,Janik Walter Andrejkovic ,Jason Sang Hun Lee ,Jeongeun Lee ,Jeremie Alexandre Merlin ,Ji Won Park ,Jian Wang ,Jim Freeman ,Jingyan Li ,Jingyu Zhang ,Jiwoong Kim ,Joaquin Emilo Siado ,John D Lawrence ,Jona Motta ,Jonas Rübenach ,Jonathan Guiang ,José David Ruiz Álvarez ,Junho Kim ,Jun‐Ho Choi ,Justin Anguiano ,K Buńkowski ,K Cankoçak ,K De Leo,K Ehataht,K Ellis ,K F Di Petrillo,K Hurtado Anampa,K Höepfner ,K M Black ,K Vellidis,K Wichmann,K Öcalan ,K Österberg ,K Özdemir ,Kai-Feng Chen ,Kathryn Coldham ,Katie Walkingshaw Pass ,Khawla Jaffel ,Kin Ho Lo ,Kisoo Lee ,Kithsiri Malagalage ,Konstantin Shchablo ,Kristan Allan Hahn ,Krisztián Farkas ,Krunal Gedia ,Kyeongpil Lee ,Kyle Cormier ,Kyong Sei Lee ,L Brigliadori,L Felď ,Laurits Tani ,Leonardo Lunerti ,Lloyd Stanley Durkin ,Long Wang ,Lorenzo Vigilante ,Lucas Wiens ,Luka Lambrecht ,M Aguilar-Benı́tez ,M Besançon ,M Calderón De La Barca Sánchez ,M Choi,M Csanád ,M Della Negra,M Déjardin ,M Fernández ,M Grünewald ,M Kröhn ,M Lazarovits,M Lipiński ,M M Defranchis,M Magherini,M Mohammadi Najafabadi,M Naimuddin,M Roguljić ,M Scham,M Teklishyn,M Van De Klundert,M Vander Donckt,M Waßmer ,Maciej Malawski ,Manuel Olmedo Negrete ,Margaret Eminizer ,Maria Agnese Ciocci ,Maria Capeans Garrido ,Maria Margherita Obertino ,Martha Nunez Ornelas ,Matteo Pisano ,Matthew Nickel ,Mauro Emanuele Dinardo ,Meena Meena ,Mehmet Özgür Sahin ,Mei-Li Holmberg ,Miaoyuan Liu ,Michael Benjamin Andrews ,Michael Henry Schmitt ,Michael Lukasik ,Michael Oshiro ,Michal Bluj ,Miguel Alves Gallo Pereira ,Mikael Myllymäki ,Mikel Mendizabal Morentin ,Mikko Lotti ,Milos Vojinovic ,Mingshui Chen ,Minseok Oh ,Mohammad Hassan Hassanshahi ,Moisés León Coello ,Mugeon Kim ,N De Filippis,N Godinović ,N Norjoharuddeen ,N Raičević ,N Van Remortel,Neha Rawal ,Nicolaus Kratochwil ,O Buchmüller ,O González López ,O Hlushchenko,O Kukral,O Rieger,Oleg Filatov ,Oleg Teryaev ,P Adžić ,P Chang,P Das,P H Hansen ,P Kontaxakis,P Maksimović ,P Martinez Ruiz Del Arbol,P Milenović ,P Priyanka,P Rebello Teles,P Van Hove,P Van Mechelen,P Van Mulders,P De Barbaro,Pablo Matorras Cuevas ,Parker Gardner ,Pedro Silva ,Piero Giorgio Verdini ,Po-Hsun Chen ,Q Ingram,Qiang Li ,Quan Wang ,Qun Wang ,R Del Burgo,R Démina ,R E Sosa Ricardo,R Granier De Cassagnac,R López-Fernández ,R Taus,Raghav Kansal ,Rajdeep Mohan Chatterjee ,Ralf Florian Von Cube ,Ravindra Kumar Verma ,Riccardo Andrea Manzoni ,Robert Lee ,Rudolf Fruehwirth ,Ryan Mueller ,S Abu Zeid,S Afanasiev,S Argirò ,S Consuegra Rodŕıguez ,S Czellár ,S Dubé ,S Gianì ,S Lökòs ,S Perriès ,S Rudrabhatla,S Scarfì ,S Slabospitskii,S Sánchez Cruz ,S Tkaczyk,S Van Putte,S Webb ,S Çerçi ,S Özkorucuklu ,S Đurić ,Samuel Bright-Thonney ,Sandhya Jain ,Sandra S Padula,Sangeun Lee ,Sanjeev Kumar ,Saptaparna Bhattacharya ,Sarah Seif El Nasr-Storey ,Saranya Ghosh ,Sascha Pascal Liechti ,Seh Wook Lee ,Seulgi Kim ,Sh Jain,Shamik Ghosh ,Shaun Hogan ,Sihyun Jeon ,Sijing Zhang ,Silvia Goy López ,Simranjit Singh Chhibra ,Siqi Yuan ,Sitong An ,Stefan Wünsch ,Steffie Ann Thayil ,Stephen Trembath-Reichert ,Subash Chandra Behera ,Sung Keun Park ,Sung Won Lee ,Sungwoong Cho ,Sushrut Karmarkar ,Suzanne Rosenzweig ,T Csörgõ ,T Geralis,T Krämer ,T Novák ,T Tabarelli De Fatis,T Šuša ,Tae Jeong Kim ,Taha Beyrouthy ,Tamer Elkafrawy ,Tao Huang ,Thea Klaeboe Aarrestad ,Theodor Christian Herwig ,Thiago Tomei ,Thomas Müller ,Tiehui Liu ,Toms Torims ,Tu Thong Tran ,U K Yang,V Brigljević ,V Kutzner,V Lemaı̂tre ,V Milošević ,V Rodŕıguez Bouza ,V Veszprémi ,Valeria D'amante ,Victor Kim ,Vladimir Ivantchenko ,Vladislav Borshch ,W Haj Ahmad,W Jang,W Snoeys,W Van Doninck,Wan Ahmad Tajuddin Wan Abdullah ,Wei Li ,Weijie Jin ,Wenyu Zhang ,Wesley Terrill ,Wing Yan Wong ,Wolfram Dietrich Zeuner ,X Janssen ,Xiao Wang ,Xuan Chen ,Y Chào ,Y Güler ,Yang Yu ,Yechan Kang ,Yen-Jie Lee ,Yi Chen ,Yi Wang ,Yi Zhang ,Yihan Liu ,Yonghoon Lee ,Yongsun Kim ,You-Ying Li ,Yousen Zhang ,Yuan Chen ,Yuan Li ,Yunjae Lee ,Yuri Andreev ,Z Flowers,Z Szillási ,Z Y You ,Zachary Warner ,Zhangqier Wang ,Zhenyu Ye ,Zhi Liu ,Zhicai Zhang ,Zhixing Wang ,Ziheng Chen ,A Agapitos,A Ahmad,A Ahmed,A Akpinar,A Albert,A Apresyan,A Apyan,A Askew,A Attikis,A Awais,A Babaev,A Baty,A Bean,A Belloni,A Bellora,A Belyaev,A Benaglia,A Benecke,A Bermúdez Martínez,A Bethani,A Bhardwaj,A Bocci,A Boletti,A Braghieri,A Brinkerhoff,A Buccilli,A Buchot Perraguin,A Bundock,A Bylinkin,A C Marini,A C Mignerey,A Cabrera,A Calandri,A 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Kim ,Jaebak Kim ,Jin Wang ,Jing Wang ,K A Ulmer,K A Wozniak,K Androsov,K Bloom,K Borras,K Burkett,K Burt,K Christoforou,K Dilsiz,K Doroba,K El Morabit,K F Johnson,K Gill,K H M Kwok,K Harder,K Hatakeyama,K J Pena Rodriguez,K Kaadze,K Klein,K Kousouris,K Lamichhane,K Lannon,K Lassila-Perini,K Lipka,K Liyanage,K Long,K M Ecklund,K Maeshima,K Mandal,K Manolopoulos,K Matchev,K Mazumdar,K Mei,K Mohrman,K Mondal,K Mota Amarilo,K Nam,K Nash,K Naskar,K Padeken,K Pedro,K Rabbertz,K Ranjan,K Salyer,K Sandeep,K Schweiger,K Shchelina,K Shi,K Skovpen,K Stenson,K T Lau,K Tatar,K Theofilatos,K Uchida,K W Bell,K Wei,K Wong,K Yi,L A T Bauerdick,L Benato,L Benussi,L Bianchini,L Borgonovi,L Cadamuro,L Calligaris,L Caminada,L Ceard,L Corcodilos,L Cristella,L Didukh,L Dudko,L Fanò,L Favart,L Finco,L Fiore,L Forthomme,L Giannini,L Giommi,L Gouskos,L Gray,L Grzanka,L Guiducci,L Gutay,L Guzzi,L Hay,L I Estevez Banos,L Kardapoltsev,L Kreczko,L Layer,L Lechner,L Levchuk,L Lista,L Litov,L Lyons,L M Pant,L 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Guchait,M Gul,M Guthoff,M Górski,M Hadley,M Haranko,M Heindl,M Herndon,M Hildreth,M Hohlmann,M Hu,M Huwiler,M I Asghar,M I Josa,M I M Awan,M Ignatenko,M Ince,M Jeitler,M Johnson,M Jones,M Joyce,M Kadastik,M Kasemann,M Kaur,M Kaya,M Kazana,M Khakzad,M Kilpatrick,M Kirakosyan,M Kirsanov,M Klute,M Kolosova,M Komm,M Konecki,M Kovac,M Kumar,M Lethuillier,M Lizzo,M Lu,M M A Gadallah,M M Baarmand,M Maggi,M Mahdavikhorrami,M Maity,M Malberti,M Mannelli,M Margoni,M Masciovecchio,M Menichelli,M Merschmeyer,M Meschini,M Metzler,M Meyer,M Misheva,M Missiroli,M Mittal,M Monteno,M Mulders,M Mulhearn,M Murray,M Musich,M N Yusli,M Narain,M Neukum,M Nguyen,M Niedziela,M Osherson,M P Rauch,M Paganoni,M Paulini,M Pelliccioni,M Peruzzi,M Pesaresi,M Pieri,M Pierini,M Pitt,M Presilla,M Quinnan,M R Adams,M R Darwish,M R Di Domenico,M Rahmani,M Raidal,M Reichmann,M Reid,M Revering,M Rieger,M Rodozov,M Rovere,M Ruspa,M S Ryu,M Saunders,M Savina,M Savitskyi,M Schnepf,M Schröder,M Schönenberger,M Seidel,M Selvaggi,M Sharan,M Shoaib,M Shopova,M Spanring,M Spiropulu,M Stojanovic,M Swartz,M Szleper,M T Lucchini,M T Meinhard,M Tadel,M Teroerde,M Thiel,M Titov,M Toms,M Tornago,M Tosi,M Tytgat,M Vanden Bemden,M Velasco,M Vit,M Voutilainen,M W Arenton,M Walczak,M Waqas,M Wayne,M Weber,M Wolf,M Xiao,M Yalvac,M Zanetti,M Zarucki,M Zeinali,Min Suk Kim ,N Akchurin,N Amapane,N Amin,N Bacchetta,N Bartosik,N Cartiglia,N Cavallo,N Chanon,N Chernyavskaya,N Colino,N Deelen,N Demaria,N Dev,N Dhingra,N Dupont,N Emriskova,N Faltermann,N Haubrich,N J Hadley,N Krammer,N Krasnikov,N Leonardo,N Loukas,N Lu,N Lychkovskaya,N Manganelli,N Manthos,N Marinelli,N Menendez,N Minafra,N Neumeister,N Odell,N Parashar,N Pastika,N Pastrone,N Perera,N Postiau,N Poudyal,N Redaelli,N Röwert,N Saoulidou,N Schroeder,N Shafiei,N Smith,N Srimanobhas,N Strobbe,N Stylianou,N Sur,N Tonon,N Trevisani,N Turini,N Tyurin,N V Tran,N Varelas,N Voytishin,N Wardle,N Wickramage,N Z Jomhari,O Amram,O Baron,O Behnke,O Bouhali,O Bychkova,O 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Quast,T Reis,T Reitenspiess,T Rodrigo,T Rohe,T Rovelli,T Roy,T Sarkar,T Schuh,T Sculac,T Tedeschi,T Toriashvili,T Tuuva,T Virdee,T Wamorkar,T Williams,T Ziemons,T Á Vámi,U Dosselli,U G Tok,U Gasparini,U Goerlach,U Heintz,U Husemann,U Hussain,U Joshi,U Kiminsu,U Langenegger,U Molinatti,U Sarica,U Sarkar,V Andreev,V Avati,V Bertacchi,V Bhatnagar,V Blinov,V Botta,V Candelise,V Cepaitis,V Chekhovsky,V Cherepanov,V Ciriolo,V Ciulli,V D Elvira,V Danilov,V Dutta,V E Barnes,V Epshteyn,V Gavrilov,V Golovtcov,V Hagopian,V Hegde,V Innocente,V J Smith,V Jha,V K Muraleedharan Nair Bindhu,V Karjavine,V Klyukhin,V Korenkov,V Krutelyov,V Kumar,V M Mikuni,V Mariani,V Mastrapasqua,V Matveev,V Murzin,V Nguyen,V Okhotnikov,V Oreshkin,V O’Dell,V Palichik,V Papadimitriou,V Perelygin,V Perovic,V Petrov,V Popov,V R Tavolaro,V Re,V Rusinov,V Savrin,V Scheurer,V Shalaev,V Shang,V Sharma,V Smirnov,V Sola,V Sordini,V Stampf,V Valuev,V Veckalns,W A Khan,W A Nash,W Adam,W Busza,W Carvalho,W De Boer,W Elmetenawee,W Erdmann,W Funk,W G D Dharmaratna,W H Smith,W J Spalding,W Johns,W L Aldá Júnior,W Lange,W Lin,W Lohmann,W Lustermann,W Shi,W Si,W Sun,W T Ford,W Tabb,W Verbeke,W Vetens,W Waltenberger,W Xie,X Coubez,X Gao,X Lyu,X Yan,X Zuo,Y Ban,Y Cheng,Y D Oh,Y Feng,Y Gershtein,Y Go,Y Haddad,Y Iiyama,Y Ivanov,Y Jeong,Y Komurcu,Y Kubota,Y Maghrbi,Y Mao,Y Maravin,Y Mohammed,Y Musienko,Y Onel,Y Otarid,Y Rath,Y Roh,Y Sirois,Y Skovpen,Y Takahashi,Y Wen,Y Xiang,Yao Yao ,Z Demiragli,Z Gecse,Z Hu,Z L Trocsanyi,Z Lin,Z S Demiroglu,Z Shi,Z Tsamalaidze,Z Wu,Z Zolkapli,Álvaro Navarro Tobar ,É Chapon ,Ö Özçelik,Ž Antunović ,А Александров ,А Спиридонов ,В Качанов ,В Макаренко ,В Сулимов ,Г Тамулайтис ,Д Педрини ,Д Сеитова ,М Фингер ,Н Голубев ,Р Тенчини

doi:10.1007/jhep01(2022)188

Abstract

Measurements of jet substructure describing the composition of quark- and gluon-initiated jets are presented. Proton-proton (pp) collision data at sqrt{s} = 13 TeV collected with the CMS detector are used, corresponding to an integrated luminosity of 35.9 fb−1. Generalized angularities are measured that characterize the jet substructure and distinguish quark- and gluon-initiated jets. These observables are sensitive to the distributions of transverse momenta and angular distances within a jet. The analysis is performed using a data sample of dijet events enriched in gluon-initiated jets, and, for the first time, a Z+jet event sample enriched in quark-initiated jets. The observables are measured in bins of jet transverse momentum, and as a function of the jet radius parameter. Each measurement is repeated applying a “soft drop” grooming procedure that removes soft and large angle radiation from the jet. Using these measurements, the ability of various models to describe jet substructure is assessed, showing a clear need for improvements in Monte Carlo generators.

Highlights

(CF = 4/3) and gluons (CA = 3) leads to a higher probability for gluons to radiate a soft gluon by a factor of CA/CF = 9/4 [6]
Where zi is the fractional transverse momentum carried by the ith jet constituent, R is the jet radius parameter, and ∆Ri is the displacement of the constituent from the jet axis, defined as ∆Ri = (∆yi)2 + (∆φi)2 where ∆yi and ∆φi are the separations in rapidity and azimuthal angle, respectively, between the jet axis and the ith constituent
Each quantity is measured as a function of jet transverse momentum pT, with different jet radius parameters, including all particles and only charged particles, and with and without applying a soft drop grooming procedure [56] that removes soft and wide angle radiation from the jet, thereby making the jet substructure observables more resilient to effects from pileup, underlying event, and initial state radiation

Summary

The CMS detector and event reconstruction

The central feature of the CMS apparatus is a superconducting solenoid of 6 m internal diameter, providing a magnetic field of 3.8 T. Matching muons to tracks measured in the silicon tracker results in a relative transverse momentum resolution, for muons with pT up to 100 GeV, of 1% in the barrel and 3% in the endcaps. The energy of electrons is determined from a combination of the electron momentum at the primary interaction vertex as determined by the tracker, the energy of the corresponding ECAL cluster, and the energy sum of all bremsstrahlung photons spatially compatible with originating from the electron track. The energy of charged hadrons is determined from a combination of their momentum measured in the tracker and the matching ECAL and HCAL energy deposits, corrected for the response function of the calorimeters to hadronic showers. The probability to originate from the primary interaction vertex is deduced by comparing the momentum distribution variable to its event median characterizing the expected value for particles from pileup vertices. The second level, known as the high-level trigger, consists of a farm of processors running a version of the full event reconstruction software optimized for fast processing, and reduces the event rate to around 1 kHz before data storage

Data and simulated samples

Event selection

Jet substructure observables

Unfolding and systematic uncertainties

Results and discussion

Summary