Determination of |Vub| from simultaneous measurements of untagged B0→π−ℓ νℓ and B →ρ0ℓ νℓ decays

I Adachi; L Aggarwal; H Aihara; N Akopov; A Aloisio; N Althubiti; N Anh Ky; DM Asner; H Atmacan; T Aushev; V Aushev; M Aversano; R Ayad; V Babu; H Bae; S Bahinipati; P Bambade; Sw Banerjee; S Bansal; M Barrett; J Baudot; M Bauer; A Baur; A Beaubien; F Becherer; J Becker; JV Bennett; FU Bernlochner; V Bertacchi; M Bertemes; E Bertholet; M Bessner; S Bettarini; B Bhuyan; F Bianchi; L Bierwirth; T Bilka; D Biswas; A Bobrov; D Bodrov; A Bolz; J Borah; A Boschetti; A Bozek; M Bračko; P Branchini; RA Briere; TE Browder; A Budano; S Bussino; Q Campagna; M Campajola; L Cao; G Casarosa; C Cecchi; J Cerasoli; M-C Chang; P Chang; R Cheaib; P Cheema; BG Cheon; K Chilikin; K Chirapatpimol; H-E Cho; K Cho; S-J Cho; S-K Choi; S Choudhury; L Corona; JX Cui; F Dattola; E De La Cruz-Burelo; SA De La Motte; G De Nardo; M De Nuccio; G De Pietro; R de Sangro; M Destefanis; S Dey; R Dhamija; A Di Canto; F Di Capua; J Dingfelder; Z Doležal; I Domínguez Jiménez; TV Dong; M Dorigo; D Dorner; K Dort; D Dossett; S Dreyer; S Dubey; K Dugic; G Dujany; P Ecker; M Eliachevitch; P Feichtinger; T Ferber; T Fillinger; C Finck; G Finocchiaro; A Fodor; F Forti; A Frey; BG Fulsom; A Gabrielli; M Garcia-Hernandez; R Garg; G Gaudino; V Gaur; A Gaz; A Gellrich; G Ghevondyan; D Ghosh; H Ghumaryan; G Giakoustidis; R Giordano; A Giri; A Glazov; B Gobbo; R Godang; O Gogota; P Goldenzweig; S Granderath; D Greenwald; Z Gruberová; T Gu; K Gudkova; I Haide; S Halder; Y Han; T Hara; C Harris; K Hayasaka; H Hayashii; S Hazra; C Hearty; MT Hedges; A Heidelbach; I Heredia de la Cruz; M Hernández Villanueva; T Higuchi; M Hoek; M Hohmann; P Horak; C-L Hsu; T Humair; T Iijima; K Inami; N Ipsita; A Ishikawa; R Itoh; M Iwasaki; P Jackson; WW Jacobs; E-J Jang; S Jia; Y Jin; A Johnson; KK Joo; H Junkerkalefeld; D Kalita; AB Kaliyar; J Kandra; KH Kang; S Kang; G Karyan; T Kawasaki; F Keil; C Kiesling; C-H Kim; DY Kim; K-H Kim; Y-K Kim; H Kindo; K Kinoshita; P Kodyš; T Koga; S Kohani; K Kojima; T Konno; A Korobov; S Korpar; E Kovalenko; R Kowalewski; P Križan; P Krokovny; T Kuhr; Y Kulii; J Kumar; M Kumar; R Kumar; K Kumara; T Kunigo; A Kuzmin; Y-J Kwon; S Lacaprara; K Lalwani; T Lam; L Lanceri; JS Lange; M Laurenza; K Lautenbach; R Leboucher; FR Le Diberder; MJ Lee; P Leo; C Lemettais; D Levit; PM Lewis; LK Li; SX Li; Y Li; YB Li; J Libby; Z Liptak; MH Liu; QY Liu; ZQ Liu; D Liventsev; S Longo; T Lueck; C Lyu; Y Ma; M Maggiora; SP Maharana; R Maiti; S Maity; G Mancinelli; R Manfredi; E Manoni; M Mantovano; D Marcantonio; S Marcello; C Marinas; C Martellini; A Martens; A Martini; T Martinov; L Massaccesi; M Masuda; D Matvienko; SK Maurya; JA McKenna; R Mehta; F Meier; M Merola; F Metzner; C Miller; M Mirra; S Mitra; K Miyabayashi; R Mizuk; GB Mohanty; S Mondal; S Moneta; H-G Moser; M Mrvar; R Mussa; I Nakamura; M Nakao; Y Nakazawa; A Narimani Charan; M Naruki; D Narwal; Z Natkaniec; A Natochii; L Nayak; M Nayak; G Nazaryan; M Neu; M Niiyama; S Nishida; S Ogawa; Y Onishchuk; H Ono; G Pakhlova; S Pardi; K Parham; H Park; J Park; S-H Park; B Paschen; A Passeri; S Patra; S Paul; TK Pedlar; R Peschke; R Pestotnik; M Piccolo; LE Piilonen; G Pinna Angioni; PLM Podesta-Lerma; T Podobnik; S Pokharel; C Praz; S Prell; E Prencipe; MT Prim; I Prudiiev; H Purwar; P Rados; G Raeuber; S Raiz; N Rauls; M Reif; S Reiter; M Remnev; L Reuter; I Ripp-Baudot; G Rizzo; SH Robertson; M Roehrken; JM Roney; A Rostomyan; N Rout; DA Sanders; S Sandilya; L Santelj; Y Sato; V Savinov; B Scavino; C Schmitt; S Schneider; M Schnepf; C Schwanda; Y Seino; A Selce; K Senyo; J Serrano; ME Sevior; C Sfienti; W Shan; C Sharma; CP Shen; XD Shi; T Shillington; T Shimasaki; J-G Shiu; D Shtol; A Sibidanov; F Simon; JB Singh; J Skorupa; RJ Sobie; M Sobotzik; A Soffer; A Sokolov; E Solovieva; S Spataro; B Spruck; M Starič; P Stavroulakis; S Stefkova; R Stroili; M Sumihama; K Sumisawa; W Sutcliffe; N Suwonjandee; H Svidras; M Takahashi; M Takizawa; U Tamponi; S Tanaka; K Tanida; F Tenchini; A Thaller; O Tittel; R Tiwary; D Tonelli; E Torassa; K Trabelsi; M Uchida; I Ueda; T Uglov; K Unger; Y Unno; K Uno; S Uno; Y Ushiroda; SE Vahsen; R van Tonder; KE Varvell; M Veronesi; A Vinokurova; VS Vismaya; L Vitale; V Vobbilisetti; R Volpe; A Vossen; B Wach; M Wakai; S Wallner; E Wang; M-Z Wang; Z Wang; A Warburton; M Watanabe; S Watanuki; C Wessel; E Won; XP Xu; BD Yabsley; S Yamada; SB Yang; J Yelton; JH Yin; YM Yook; K Yoshihara; CZ Yuan; L Zani; F Zeng; B Zhang; V Zhilich; JS Zhou; QD Zhou; XY Zhou; VI Zhukova; R Žlebčík

Journal article

Determination of |Vub| from simultaneous measurements of untagged B0→π−ℓ νℓ and B →ρ0ℓ νℓ decays

I Adachi, L Aggarwal, H Aihara, N Akopov, A Aloisio, N Althubiti, N Anh Ky, DM Asner, H Atmacan, T Aushev, V Aushev, M Aversano, R Ayad, V Babu, H Bae, S Bahinipati, P Bambade, Sw Banerjee, S Bansal, M Barrett Show all

Physical Review D | American Physical Society (APS) | Published : 2025

DOI: 10.1103/jnwn-ts6q

Abstract

We present a measurement of |Vub| from a simultaneous study of the charmless semileptonic decays B0→π−ℓ+νℓ and B+→ρ0ℓ+νℓ, where ℓ=e, μ. This measurement uses a data sample of 387 million BB¯ meson pairs recorded by the Belle II detector at the SuperKEKB electron-positron collider between 2019 and 2022. The two decays are reconstructed without identifying the partner B mesons. We simultaneously measure the differential branching fractions of B0→π−ℓ+νℓ and B+→ρ0ℓ+νℓ decays as functions of q2 (momentum transfer squared). From these, we obtain total branching fractions B(B0→π−ℓ+νℓ)=(1.516±0.042(stat)±0.059(syst))×10−4 and B(B+→ρ0ℓ+νℓ)=(1.625±0.079(stat)±0.180(syst))×10−4. By fitting the measured..

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