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Study of Exclusive $B \to \pi e^+ \nu_e$ Decays with Hadronic Full-event-interpretation Tagging in 189.3 fb$^{-1}$ of Belle II Data

Belle II Collaboration,F. Abudinén,I. Adachi,K. Adamczyk,L. Aggarwal,P. Ahlburg,H. Ahmed,J. K. Ahn,H. Aihara,N. Akopov,A. Aloisio,F. Ameli,L. Andricek,N. Anh Ky,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,V. Aushev,T. Aziz,V. Babu,S. Bacher,H. Bae,S. Baehr,S. Bahinipati,A. M. Bakich,P. Bambade,Sw. Banerjee,S. Bansal,M. Barrett,G. Batignani,J. Baudot,M. Bauer, A. Baur, A. Beaubien, A. Beaulieu,J. Becker,P. K. Behera,J. V. Bennett,E. Bernieri,F. U. Bernlochner,V. Bertacchi,M. Bertemes,E. Bertholet,M. Bessner,S. Bettarini,V. Bhardwaj,B. Bhuyan,F. Bianchi,T. Bilka,S. Bilokin,D. Biswas,A. Bobrov,D. Bodrov,A. Bolz,A. Bondar,G. Bonvicini,A. Bozek,M. Bračko,P. Branchini,N. Braun,R. A. Briere,T. E. Browder,D. N. Brown,A. Budano,L. Burmistrov,S. Bussino,M. Campajola,L. Cao,G. Casarosa,C. Cecchi,D. Červenkov,M. -C. Chang,P. Chang,R. Cheaib,P. Cheema,V. Chekelian,C. Chen, Y. Q. Chen,Y. -T. Chen,B. G. Cheon,K. Chilikin,K. Chirapatpimol, H. -E. Cho, K. Cho,S. -J. Cho,S. -K. Choi,S. Choudhury,D. Cinabro,L. Corona,L. M. Cremaldi,S. Cunliffe,T. Czank,S. Das,N. Dash,F. Dattola,E. De La Cruz-Burelo,S. A. De La Motte,G. de Marino,G. De Nardo,M. De Nuccio,G. De Pietro,R. de Sangro,B. Deschamps, M. Destefanis,S. Dey,A. De Yta-Hernandez,R. Dhamija,A. Di Canto,F. Di Capua,S. Di Carlo,J. Dingfelder,Z. Doležal,I. Domínguez Jiménez,T. V. Dong,M. Dorigo,K. Dort,D. Dossett, S. Dreyer,S. Dubey,S. Duell,G. Dujany,P. Ecker, S. Eidelman,M. Eliachevitch,D. Epifanov,P. Feichtinger,T. Ferber,D. Ferlewicz,T. Fillinger,C. Finck,G. Finocchiaro,P. Fischer,K. Flood,A. Fodor,F. Forti,A. Frey,M. Friedl,B. G. Fulsom,M. Gabriel,A. Gabrielli,N. Gabyshev,E. Ganiev,M. Garcia-Hernandez,R. Garg,A. Garmash,V. Gaur,A. Gaz,U. Gebauer,A. Gellrich,J. Gemmler,T. Geßler,G. Ghevondyan,G. Giakoustidis,R. Giordano,A. Giri,A. Glazov,B. Gobbo,R. Godang,P. Goldenzweig,B. Golob,P. Gomis,G. Gong,P. Grace,W. Gradl,S. Granderath,E. Graziani,D. Greenwald,T. Gu,Y. Guan,K. Gudkova,J. Guilliams,C. Hadjivasiliou,S. Halder, K. Hara,T. Hara,O. Hartbrich, K. Hayasaka,H. Hayashii,S. Hazra,C. Hearty,M. T. Hedges, I. Heredia de la Cruz,M. Hernández Villanueva,A. Hershenhorn,T. Higuchi,E. C. Hill,H. Hirata,M. Hoek,M. Hohmann,S. Hollitt,T. Hotta,C. -L. Hsu,K. Huang,T. Humair,T. Iijima,K. Inami,G. Inguglia,N. Ipsita,J. Irakkathil Jabbar,A. Ishikawa,S. Ito,R. Itoh,M. Iwasaki,Y. Iwasaki,S. Iwata,P. Jackson,W. W. Jacobs,D. E. Jaffe,E. -J. Jang,M. Jeandron,H. B. Jeon,Q. P. Ji,S. Jia,Y. Jin,C. Joo,K. K. Joo,H. Junkerkalefeld,I. Kadenko,J. Kahn,H. Kakuno,M. Kaleta,A. B. Kaliyar,J. Kandra, K. H. Kang,S. Kang,P. Kapusta,R. Karl,G. Karyan,Y. Kato, H. Kawai,T. Kawasaki,C. Ketter,H. Kichimi, C. Kiesling, C. -H. Kim, D. Y. Kim,H. J. Kim,K. -H. Kim,K. Kim, S. -H. Kim,Y. -K. Kim, Y. Kim,T. D. Kimmel,H. Kindo,K. Kinoshita, C. Kleinwort,B. Knysh, P. Kodyš,T. Koga,S. Kohani,K. Kojima,I. Komarov,T. Konno,A. Korobov, S. Korpar,N. Kovalchuk,E. Kovalenko,R. Kowalewski,T. M. G. Kraetzschmar,F. Krinner, P. Križan,R. Kroeger,J. F. 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Muroyama,C. Murphy,R. Mussa,I. Nakamura,K. R. Nakamura,E. Nakano,M. Nakao,H. Nakayama,H. Nakazawa,A. Narimani Charan,M. Naruki,Z. Natkaniec,A. Natochii,L. Nayak,M. Nayak,G. Nazaryan,D. Neverov,C. Niebuhr,M. Niiyama,J. Ninkovic,N. K. Nisar,S. Nishida,K. Nishimura,M. H. A. Nouxman,K. Ogawa,S. Ogawa,S. L. Olsen,Y. Onishchuk,H. Ono,Y. Onuki,P. Oskin,F. Otani,E. R. Oxford,H. Ozaki,P. Pakhlov,G. Pakhlova,A. Paladino,T. Pang,A. Panta,E. Paoloni,S. Pardi,K. Parham,H. Park, S. -H. Park,B. Paschen,A. Passeri,A. Pathak,S. Patra,S. Paul, T. K. Pedlar,I. Peruzzi,R. Peschke, R. Pestotnik,F. Pham,M. Piccolo,L. E. Piilonen, G. Pinna Angioni,P. L. M. Podesta-Lerma,T. Podobnik,S. Pokharel,L. Polat,V. Popov, C. Praz,S. Prell,E. Prencipe,M. T. Prim,M. V. Purohit,H. Purwar,N. Rad,P. Rados,S. Raiz,A. Ramirez Morales,R. Rasheed,N. Rauls,M. Reif,S. Reiter,M. Remnev,I. Ripp-Baudot,M. Ritter,M. Ritzert,G. Rizzo,L. B. Rizzuto,S. H. Robertson,D. Rodríguez Pérez,J. M. Roney,C. Rosenfeld,A. Rostomyan,N. Rout,M. Rozanska,G. Russo,D. Sahoo,Y. Sakai,D. A. Sanders,S. Sandilya,A. Sangal,L. Santelj,P. Sartori,Y. Sato,V. Savinov,B. Scavino,M. Schnepf,M. Schram,H. Schreeck,J. Schueler, C. Schwanda,A. J. Schwartz,B. Schwenker,M. Schwickardi,Y. Seino,A. Selce,K. Senyo,I. S. Seong,J. Serrano,M. E. Sevior,C. Sfienti,V. Shebalin,C. P. Shen,H. Shibuya,T. Shillington,T. Shimasaki,J. -G. Shiu,B. Shwartz, A. Sibidanov,F. Simon,J. B. Singh,S. Skambraks,J. Skorupa,K. Smith,R. J. Sobie,A. Soffer,A. Sokolov,Y. Soloviev, E. Solovieva,S. Spataro,B. Spruck,M. Starič,S. Stefkova,Z. S. Stottler,R. Stroili,J. Strube,J. Stypula,Y. Sue,R. Sugiura,M. Sumihama, K. Sumisawa,T. Sumiyoshi, W. Sutcliffe,S. Y. Suzuki,H. Svidras,M. Tabata,M. Takahashi,M. Takizawa,U. Tamponi,S. Tanaka, K. Tanida,H. Tanigawa,N. Taniguchi,Y. Tao, P. Taras, F. Tenchini,R. Tiwary,D. Tonelli,E. Torassa,N. Toutounji,K. Trabelsi,I. Tsaklidis,T. Tsuboyama,N. Tsuzuki,M. Uchida,I. Ueda,S. Uehara,Y. Uematsu,T. Ueno,T. Uglov,K. Unger,Y. Unno,K. Uno,S. Uno,P. Urquijo,Y. Ushiroda,Y. V. Usov,S. E. Vahsen,R. van Tonder,G. S. Varner,K. E. Varvell,A. Vinokurova,L. Vitale,V. Vobbilisetti,V. Vorobyev,A. Vossen,B. Wach,E. Waheed,H. M. Wakeling,K. Wan,W. Wan Abdullah,B. Wang,C. H. Wang,E. Wang,M. -Z. Wang,X. L. Wang,A. Warburton,M. Watanabe,S. Watanuki,J. Webb,S. Wehle,M. Welsch,C. Wessel,J. Wiechczynski,P. Wieduwilt,H. Windel,E. Won, L. J. Wu,X. P. Xu,B. D. Yabsley,S. Yamada,W. Yan,S. B. Yang,H. Ye,J. Yelton,J. H. Yin,M. Yonenaga,Y. M. Yook,K. Yoshihara,T. Yoshinobu,C. Z. Yuan,Y. Yusa,L. Zani,Y. Zhai,J. Z. Zhang,Y. Zhang,Z. Zhang,V. Zhilich,J. Zhou,Q. D. Zhou,X. Y. Zhou,V. I. Zhukova,V. Zhulanov,R. Žlebčík

arXiv (Cornell University)(2022)

Cited 1|Views175
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Abstract
We present a reconstruction of the semileptonic decays $B^0 \to \pi^- e^+ \nu_e$ and $B^+ \to \pi^0 e^+ \nu_e$ in a sample corresponding to 189.3 fb$^{-1}$ of Belle II data, using events where the partner $B$-meson is reconstructed from a large variety of hadronic channels via a tagging algorithm known as the full-event-interpretation. We determine the partial branching fractions in three bins of the squared momentum transfer to the leptonic system using fits to the distribution of the square of the missing mass. The partial branching fractions are summed to determine $\mathcal{B}(B^0 \to \pi^- e^+ \nu_e)$ = (1.43 $\pm$ 0.27(stat) $\pm$ 0.07(syst)) $\times 10^{-4}$ and $\mathcal{B}(B^+ \to \pi^0 e^+ \nu_e)$ = (8.33 $\pm$ 1.67(stat) $\pm$ 0.55(syst)) $\times 10^{-5}$. We extract a first Belle II measurement of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{\mathrm{ub}}|$, with $|V_{\mathrm{ub}}|$ = (3.88 $\pm$ 0.45) $\times 10^{-3}$.
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Key words
full-event-interpretation
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