Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment * * This work was supported by the following funding sources: Science Committee of the Republic of Armenia Grant No. 18T-1C180; Australian Research Council and research grant Nos. DP180102629, DP170102389, DP170102204, DP150103061, FT130100303, and FT130100018; Austrian Federal Ministry of Education, Science and Research, and Austrian

F Abudinén,V Popov,N Taniguchi,M Bračko,S Bahinipati,M.-Z Wang,D Y Kim,M Takizawa,H Tanigawa,I.-S Lee,J Kahn,H.-E Cho,S.-H Park,N Wermes,T Hotta,M Starič,C.-H Kim,F Metzner,A Warburton,Y Q Chen,S Paul,Y Jin,G Russo,Y Unno,Z Doležal,S Bussino,C Joo,S Dey,D Levit,J Strube,K Hara,T Luo,N Kovalchuk,G De Pietro,J Mcneil,P K Behera,P Križan,M Hernández Villanueva,A Sibidanov,S Watanuki,M Tabata,H Ye,Q Y Liu,W Yan,R Peschke,F Ameli,I Domínguez Jiménez,V Zhilich,C.-L Hsu,K R Nakamura,X L Wang,A Aloisio,A Budano,S Maity,A Martini,M Milesi,C Li,K E Varvell,S X Li,C Kleinwort,D Rodríguez Pérez,M Ritter,P Urquijo,D E Jaffe,H Aihara,S C Lee,J Lin,T Konno,S Patra,I Heredia De La Cruz,W Wan Abdullah,T Aziz,Y Kim,S Bansal,P Kodyš,S Choudhury,Y B Li,M Nishimura,Z Liptak,A Fodor,Y Maeda,J Becker,I Ueda,K Cho,A Soffer,A Giri,A Gaz,D Greenwald,S Cho,V Zhulanov,Y.-T Lai,S Longo,T V Dong,B Wang,C Miller,D Červenkov,L K Li,Y K Kim,P Rados,M Bessner,Y.-T Chen,P K Resmi,F U Bernlochner,S Yamada,B Schwenker,M Ritzert,K Unger,C Sfienti,Y M Li,A Sokolov,Z Zhang,J Yelton,J Z Zhang,L B Rizzuto,E Bernieri,S Kurz,B H Kim,F Meier,S.-H Kim,Y Sato,F Simon,J Dingfelder,D Biswas,J Webb,E Manoni,Y.-J Kwon,L Andricek,S Stefkova,C Cecchi,H Hirata,Y Tao,P Grace,A M Bakich,D Kotchetkov,L Cao,S Lacaprara,J.-F Krohn ,Deepak Kumar Sahoo ,P Goldenzweig,J Wiechczynski,V Babu,S Choi ,L Li Gioi,P Taras,S Jia,S Spataro,S Sandilya,N K Nisar,S Duell,I M Peruzzi ,I Ripp-Baudot,A Beaulieu,T Bilka,R Stroili,F Muêller ,A Garmash,Shuichi Iwata ,S Fiore,L E Piilonen,P Sartori,T E Browder,S Eidelman,M Destefanis,L Lanceri,S Uehara,F Di Capua,E.-J Jang,H Kakuno,P Lewis ,V Savinov,B Knysh,R Pestotnik,S Banerjee ,K Matsuoka,S H Robertson,A J Schwartz,S Bilokin,H Ozaki,M Piccolo,J H Yin,V Gaur,S E Hollitt ,Z S Stottler,S Yang ,N Anh Ky,S Tanaka,A Sangal,T M G Kraetzschmar,G Casarosa,M Yonenaga,T Aushev,H B Jeon,A Passeri,M T Hedges,Khairul Azmi ,P Wieduwilt,K Nishimura,P Krokovny,S Skambraks,Y Yook ,J Libby,D J Summers,M De Nuccio,B Gobbo,C Schwanda,A Paladino,M Niiyama,S Bettarini,O Hartbrich,K Hayasaka,D Ferlewicz,M Sumihama,J Schueler,M Nakao,Q Zhou ,Th Müller ,M Eliachevitch,N Tsuzuki,L Šantelj ,E Torassa,N Braun,M T Prim,T Ferber,M Iwasaki,P Oskin,K Kinoshita,L Vitale,C Macqueen,Y Onishchuk,A Vinokurova,F Dattola,K Senyo,T Tsuboyama,T Uglov,S Dubey,J Gemmler,P Branchini,Hiroyuki Nakayama ,C Hadjivasiliou,R Cheaib,G Finocchiaro,P S Jackson ,Kun Wan ,V Aushev,U Gebauer,A Rostomyan,E De La Cruz-Burelo,M Merola,L Zani,M Nayak,C Praz,M Barrett,C Z Yuan,F Forti,T Czank,M Purohit ,H Kichimi,B Paschen,E Ganiev,B G Fulsom,G Varner ,C Mariñas ,S Vahsen ,Thomas Geßler ,A Bożek ,G De Nardo,C La Licata,T Morii,D A Sanders,F Bianchi,S Ogawa,C Kiesling,J S Lange,F Müller ,K Lalwani,T Iijima,H K Moon ,R Mussa,J Irakkathil Jabbar,W Sutcliffe,H Ono,M Watanabe,T Koga,H Park,T D Kimmel,M Gabriel,Xingyu Zhou ,K Inami,Y Hu,T Sumiyoshi,W Gradl,A Kuzmin,H Nakazawa,V Bansal,T Kawasaki,F Luetticke,M Masuda,E Hill ,M Campajola,P Ahlburg,C P Shen,P Leitl,L Corona,E Waheed,K Dort,A Selce,H Windel,P L.m Podesta-Lerma ,K Chilikin,K Tanida,S Di Carlo,Kuan-Hao Huang ,A Vossen,V Bhardwaj,Mahesh Kumar ,D Cinabro,G Pakhlova,J M Roney,I Komarov,Y Sakai,E Paoloni,Y Yusa,Y Onuki,B Golob,T Hara,K Miyabayashi,S Wehle,Rajeev Kumar ,A Loos,W Kuehn,D M Asner,Y Iwasaki,H Hayashii,V Zhukova ,H Miyata,E Graziani,G Karyan,R J Sobie,R Kroeger,J Baudot,E Solovieva,D Liventsev,D Neverov,V Chekelian,A Ishikawa,Raffaele Giordano ,M Schram,S Nishida,S Cunliffe,S Marcello,K Trabelsi,T Pang,R Mizuk,M Maggiora,Y Ushiroda,F Tenchini,M E Sevior,B Spruck,S Baehr,A B Kaliyar,Y Seino,M H A Nouxman,M Bertemes,Jincheng Mei ,G Inguglia,A Frey,R M Seddon,J V Bennett,C Wessel,L Cremaldi ,T Higuchi,S Korpar,G B Mohanty,R Godang,G Nazaryan,Y Kato,A De Yta-Hernandez,P Bambade,B Scavino,J G Shiu ,C Rosenfeld,N Rout,M Remnev,Rocky Bala Garg ,S Halder,D Matvienko,G Bonvicini,M C Chang ,R Van Tonder,H Atmacan,T K Pedlar,W W Jacobs,P Chang,U Tamponi,C Hearty,S Uno,H M Wakeling,R Itoh,K Lautenbach,M Uchida,K Lieret,M Garcia-Hernández ,Н Акопов ,E Nakano,P Pakhlov,H Schreeck,H Shibuya,T Kuhr,R De Sangro,A Gellrich,Pablo Gomis ,M Hoek,B Oberhof,B G Cheon,E Won,G Rizzo,I Adachi,K Kumara,E Prencipe,A D Hershenhorn ,J Guenther ,A Zupanc

doi:10.1088/1674-1137/44/2/021001

Abstract

From April to July 2018, a data sample at the peak energy of the resonance was collected with the Belle II detector at the SuperKEKB electron-positron collider. This is the first data sample of the Belle II experiment. Using Bhabha and digamma events, we measure the integrated luminosity of the data sample to be ( , where the first uncertainty is statistical and the second is systematic. This work provides a basis for future luminosity measurements at Belle II.

Highlights

Integrated luminosity (L) is a basic quantity in high energy physics experiments
This paper presents a measurement of the integrated luminosity of the first e+ e− collision data sample collected with the Belle II detector [1]
To check the impact of different θcm ranges on the measured integrated luminosities, the two measurements are repeated with Bhabha and digamma events generated in the wider θcm range 5◦ –175◦