• Corpus ID: 240353749

Exclusive $B \to X_u \ell \nu_\ell$ Decays with Hadronic Full-event-interpretation Tagging in 62.8 fb$^{-1}$ of Belle II Data

  title={Exclusive \$B \to X\_u \ell \nu\_\ell\$ Decays with Hadronic Full-event-interpretation Tagging in 62.8 fb\$^\{-1\}\$ of Belle II Data},
  author={Belle II collaboration F. Abudin'en and Iki Adachi and Rama Prasad Adak and Karol Adamczyk and L. Aggarwal and Patrick Ahlburg and H. Ahmed and Jung Keun Ahn and Hiroaki Aihara and N. Z. Akopov and Alberto Aloisio and Fabrizio Ameli and Laci Andricek and Nguyễn Anh Kỳ and David Asner and H. Atmacan and Vladimir M. Aulchenko and T. A Kh Aushev and Vassiliy Aushev and Tariq Aziz and V. Babu and S. Bacher and H. W. Bae and Steffen Baehr and Seema Bahinipati and A. M. Bakich and Ph. Bambade and Sw. Banerjee and Sunil Bansal and Matthew Barrett and Giovanni Batignani and Jerome Baudot and Manfred Bauer and Alexander Baur and Alexandre Beaulieu and Juergen Becker and P. K. Behera and J. V. Bennett and Enrico Bernieri and F. U. Bernlochner and Michel Bertemes and Emilie Bertholet and Martin Florian Bessner and Stefano Bettarini and V. Bhardwaj and Bipul Bhuyan and Federico Bianchi and Tadeas Bilka and Sviatoslav Bilokin and Debabrata Biswas and A. Bobrov and Dmitry Bobrov and A. E. Bolz and Alexander Bondar and G. Bonvicini and Andrz{\'e}j Bozek and M. Bravcko and Paolo Branchini and Nils Braun and Roy Anthony Briere and T. E. Browder and D. N. Brown and Antonio Budano and Leonid A. Burmistrov and S. Bussino and Marcello Campajola and L. Cao and Giacomo Caria and Giulia Casarosa and Claudia Cecchi and D. vCervenkov and M. C. Chang and P Chang and Racha Cheaib and Vladimir Chekelian and C. H. Chen and Y. Chen and Y.-T. Chen and Byung Gu Cheon and Kirill Chilikin and Khem Chirapatpimol and H.-E. Cho and K. Cho and S.-J. Cho and S-K. Choi and Somnath Choudhury and David Anthony Cinabro and Luigi Corona and L. Cremaldi and D. Cuesta and Samuel Cunliffe and Thomas Czank and N. Dash and Filippo Dattola and Eduard De la Cruz-Burelo and Gaetano De Marino and G. De Nardo and Marcello Nuccio and Giacomo De Pietro and Riccardo de Sangro and Bruno Deschamps and Marco Destefanis and Sourav Dey and A. De Yta-Hern{\'a}ndez and A. Di Canto and Francesco Di Capua and Salvatore Di Carlo and J. Dingfelder and Z. Dolevzal and I. Dom'inguez Jim'enez and Thanh Van Dong and M. Dorigo and Katharina Dort and David Dossett and S. Dubey and Stephan Duell and Giulio Dujany and Semen Eidelman and Michael Eliachevitch and Denis Epifanov and James E. Fast and Torben Ferber and Daniel Ferlewicz and Tristan Fillinger and Gaetano Finocchiaro and S. Fiore and P. A. Fischer and Andrea Fodor and Francesco Forti and A. Frey and Markus Friedl and B. G. Fulsom and Miroslav Gabriel and Alessandro Gabrielli and N. I. Gabyshev and Eldar Ganiev and Mar Garc{\'i}a-Hern{\'a}ndez and Rocky Bala Garg and Alexey Garmash and Vinod K. Gaur and Alessandro Gaz and U. Gebauer and Andreas Gellrich and Jochen Gemmler and Thomas Gessler and D. Getzkow and Raffaele Giordano and Anjan Kumar Giri and A. Glazov and Benigno Gobbo and R. Godang and Pablo D. Goldenzweig and Bo{\vs}tjan Golob and P. Gomis and Guanghua Gong and P. Grace and W. R. Gradl and Enrico Graziani and Daniel Greenwald and Tengfei Gu and Y. Guan and K. Gudkova and C. Hadjivasiliou and S. Halder and Kazuhiro Hara and T. Hara and Oskar Hartbrich and K. Hayasaka and Hisaki Hayashii and S.Hazra and Christopher Hearty and Morgan Hedges and I. Heredia-De La Cruz and Michel Hern{\'a}ndez Villanueva and Alon David Hershenhorn and Takuya Higuchi and E. C. Hill and Hikari Hirata and M. Hoek and Mima Hohmann and Sophie Elizabeth Hollitt and T Hotta and C-L. Hsu and Y. L. Hu and K. Huang and Thibaud Humair and Toru Iijima and Kenji Inami and Gianluca Inguglia and J. Irakkathil Jabbar and Akira Ishikawa and Ryutaro Itoh and M. Iwasaki and Yoh Iwasaki and S. Iwata and P. D. Jackson and William W. Jacobs and Igal Jaegl{\'e} and D E Jaffe and E. -J. Jang and M. Jeandron and Hyejin Jeon and Sen Jia and Y. Jin and Changwoo Joo and Kyung Kwang Joo and H. Junkerkalefeld and I. Kadenko and James Kahn and Hidekazu Kakuno and A. B. Kaliyar and Jakub Kandra and Kookjin Kang and Peter Kapusta and R. Karl and Gevorg Karyan and Yukihiro Kato and Hikaru Kawai and Toshisuke Kawasaki and Christopher K. Ketter and Hiromichi Kichimi and Ch. Kiesling and B. H. Kim and C.‐H. Kim and D. Y. Kim and H. J. Kim and K-H. Kim and K. T. Kim and Shinhong Kim and Y.-K. Kim and Y. -K. Kim and T. D. Kimmel and Haruki Kindo and K. Kinoshita and Claus Kleinwort and B. Knysh and P. Kodyvs and Taichiro Koga and Sayeh Kohani and Ilya Komarov and Tomohiro Konno and A. A. Korobov and Samo Korpar and Nataliia Kovalchuk and E. Kovalenko and Robert Victor Kowalewski and T. M. G. Kraetzschmar and Fabian Michael Krinner and Peter Krivzan and Robert Kroeger and J. F. Krohn and Pavel Krokovny and Hans Kruger and Wolfgang Kuehn and Thomas Kuhr and Jason Kumar and M. Kumar and R. Kumar and K. Kumara and Tetsuro Kumita and Takuto Kunigo and M. Kunzel and S. Kurz and Andrey Kuzmin and P. Kvasnivcka and Young Jae Kwon and Stefano Lacaprara and Y.-T. Lai and Chiara La Licata and Kavita Lalwani and Tyler Lam and L. Lanceri and Johannes Lange and Monica Laurenza and Klemens Lautenbach and P. J. Laycock and F. R. Le Diberder and I.-S. Lee and S. C. Lee and P. Leitl and Dmytro Levit and Philip Lewis and C. H. Li and L. K. Li and S. X. Li and Y. B. Li and James F. Libby and Kilian Lieret and J. Lin and Z. Liptak and Q. Y. Liu and Z. A. Liu and D. Liventsev and Stefano Longo and Alyssa Loos and A. Lozar and P. Lu and Thomas Lueck and Florian Luetticke and Tan Luo and Chen Lyu and C. MacQueen and Y. Maeda and Marco Maggiora and Souvik Maity and R. Manfredi and Elisabetta Manoni and Simonetta Marcello and C. Marinas and A. Martini and M. Masuda and Takeshi Matsuda and Kodai Matsuoka and D. Matvienko and JA McKenna and J. T. McNeil and Felix Meggendorfer and Jie Mei and Frank Meier and Mario Merola and Felix Metzner and M. Milesi and C. Miller and K. Miyabayashi and Hideki Miyake and Hitoshi Miyata and R. V. Mizuk and K. Azmi and G. B. Mohanty and H. K. Moon and T. Moon and Johnny Alejandro Mora Grimaldo and T. Morii and H-G. Moser and Manca Mrvar and Felix Mueller and F. J. Muller and Th. Muller and G. Muroyama and Colm Harold Murphy and Roberto Mussa and Isamu Nakamura and K. Nakamura and Eiichi Nakano and M. Nakao and H. Nakayama and Hideyuki Nakazawa and Zbigniew Natkaniec and A. Natochii and M. Nayak and G. Nazaryan and Dmitrii Neverov and Carsten Niebuhr and Masayuki Niiyama and Jelena Ninkovi{\'c} and Numan Nisar and Shin'ya Nishida and Kurtis Alan Nishimura and Makoto Nishimura and M. H. A. Nouxman and Benjamin Oberhof and K. Ogawa and Satoru Ogawa and Sharon L. Olsen and Yu. M. Onishchuk and Hiroaki Ono and Y. Onuki and P. Oskin and E. R. Oxford and H. Ozaki and P. Pakhlov and Galina Pakhlova and A. Paladino and Tong Pang and Antoni Pańta and Eugenio Paoloni and Silvio Pardi and H. K. Park and Sheong Hwan Park and B. Paschen and Antonio Passeri and Atanu Pathak and S. Patra and Soumen Paul and Todd Kristofer Pedlar and I. M. Peruzzi and Richard Peschke and Rok Pestotnik and F. Pham and Mauro Piccolo and Leo Piilonen and G. L. Pinna Angioni and Pedro L.M. Podesta-Lerma and Tomaz Podobnik and S. Pokharel and G. Polat and V. Popov and Christophe J. Praz and Soeren Prell and Elisabetta Prencipe and Markus Tobias Prim and M. V. Purohit and Harsh Purwar and Navid K. Rad and Pere Rados and Sebastiano Raiz and Reem Rasheed and M. Reif and Simon Reiter and M. Remnev and Philo Resmi and Isabelle Ripp-Baudot and Martin Ritter and Michael Ritzert and G. Rizzo and Leonardo Benjamin Rizzuto and Steven Robertson and D. Rodr'iguez P'erez and J. M. Roney and Carl Rosenfeld and Armine Armand Rostomyan and Niharika Rout and Maria Barbara R{\'o}żańska and Guido Russo and Deepak Kumar Sahoo and Yoshihide Sakai and David A. Sanders and S. Sandilya and Atul Sangal and Luka {\vS}antelj and P. Sartori and Y. Sato and Vladimir Savinov and Bianca Scavino and Mitchell A. Schram and Harrison Schreeck and J. Schueler and C. Schwanda and Alan Jay Schwartz and B. Schwenker and R. M. Seddon and Yoshiaki Seino and A. Selce and Katsumi Senyo and Ihn Sik Seong and Justine Serrano and M. E. Sevior and C. Sfienti and V. E. Shebalin and C. P. Shen and Hiroshi Shibuya and J. -G. Shiu and Boris A. Shwartz and A. Sibidanov and Frank Simon and J. B. Singh and Sebastian Skambraks and K. Smith and R. Sobie and Abner Soffer and Alexei Sokolov and Yu. V. Soloviev and Elena Solovieva and Stefano Spataro and Bjoern Spruck and M. Starivc and S. Stefkova and Zachary Stottler and Roberto Stroili and Jan Strube and Jacek Stypuła and Ryohei Sugiura and Mizuki Sumihama and Kazutaka Sumisawa and Takayuki Sumiyoshi and D. J. Summers and William Lawrence Sutcliffe and K. Suzuki and S. Suzuki and Henrikas Svidras and Makoto Tabata and M. Takahashi and Makoto Takizawa and Umberto Tamponi and S. Tanaka and Kiyoshi Tanida and Hikaru Tanigawa and Nanae Taniguchi and Y. R. Tao and Paul Taras and Francesco Tenchini and Rajesh Tiwary and D. Tonelli and Ezio Torassa and Nadia Toutounji and Karim Trabelsi and Tohru Tsuboyama and N. Tsuzuki and Masaki Uchida and I. Ueda and Sadaharu Uehara and Y. Uematsu and Takayuki Ueno and Timofey Uglov and Kai Lukas Unger and Y. Unno and Kentaro Uno and Shoji Uno and Phillip Urquijo and Yutaka Ushiroda and Yu. V. Usov and Sven E. Vahsen and Raynette van Tonder and G. S. Varner and Kevin Varvell and Anna Viktorovna Vinokurova and L. Vitale and Vitaly Vorobyev and A. Vossen and B. Wach and E. Waheed and H. M. Wakeling and Kun Wan and Wat Wan Abdullah and B. Wang and C. Wang and E. Wang and M.-Z. Wang and X. L. Wang and Andreas Warburton and M. Watanabe and Shoichi Watanuki and J. C. Webb and S. Wehle and Maximilian Welsch and Christian Wessel and Jaroslaw Pawel Wiechczynski and P. Wieduwilt and Hendrik Windel and Eunil Won and L. J. Wu and X. Xu and Bruce Yabsley and Sumio Yamada and W. Yan and S. B. Yang and H Y Ye and J. Yelton and In Sung Yeo and Jingbo Yin and Masanobu Yonenaga and Youngmin Yook and Keisuke Yoshihara and T. Yoshinobu and Changhai Yuan and Gang Yuan and Yosuke Yusa and Laura Zani and J. Zhang and Y. Zhang and Z. P. Zhang and V. N. Zhilich and J. Zhou and Q. D. Zhou and X. Y. Zhou and Valentina Zhukova and Vladimir Zhulanov},
We present a reconstruction in early data of the semileptonic decay B+ → π`ν`, and first results of a reconstruction of the decays B+ → ρ`ν` and B0 → ρ`ν` in a sample corresponding to 62.8 fb−1 of Belle II data using hadronic B-tagging via the full-event-interpretation algorithm. We determine the total branching fractions via fits to the distribution of the square of the missing mass, and find B(B+ → π`ν`) = (8.29 ± 1.99(stat) ± 0.46(syst)) ×10−5. We obtain 95% CL upper limits on the branching… 



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