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Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data

Publication ,  Journal Article
Collaboration, BII; Abudinén, F; Adachi, I; Adak, R; Adamczyk, K; Ahlburg, P; Ahn, JK; Aihara, H; Akopov, N; Aloisio, A; Ameli, F; Andricek, L ...
September 20, 2020

We report on first measurements of branching fractions~($\mathcal{B}$) and CP-violating charge asymmetries~($\mathcal{A}$) in charmless $B$ decays at Belle~II. We use a sample of electron-positron collisions collected in 2019 and 2020 at the $\Upsilon(4S)$ resonance and corresponding to $34.6$\,fb$^{-1}$ of integrated luminosity. We use simulation to determine optimized event selections. The $\Delta E$ distributions of the resulting samples, restricted in $M_{\rm bc}$, are fit to determine signal yields. Signal yields are corrected for efficiencies determined from simulation and control data samples to obtain branching fractions and CP-violating asymmetries for flavour-specific channels. These are the first measurements in charmless decays reported by Belle~II. Results are compatible with known determinations and show detector performance comparable with the best Belle results offering a reliable basis to assess projections for future reach.

Duke Scholars

Publication Date

September 20, 2020
 

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Collaboration, B. I. I., Abudinén, F., Adachi, I., Adak, R., Adamczyk, K., Ahlburg, P., … Wach, B. (2020). Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data.
Collaboration, Belle I. I., F. Abudinén, I. Adachi, R. Adak, K. Adamczyk, P. Ahlburg, J. K. Ahn, et al. “Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data,” September 20, 2020.
Collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, et al. Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data. 2020 Sep 20;
Collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, Ahn JK, Aihara H, Akopov N, Aloisio A, Ameli F, Andricek L, Ky NA, Asner DM, Atmacan H, Aulchenko V, Aushev T, Aushev V, Aziz T, Babu V, Bacher S, Baehr S, Bahinipati S, Bakich AM, Bambade P, Banerjee S, Bansal S, Barrett M, Batignani G, Baudot J, Beaulieu A, Becker J, Behera PK, Bender M, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bhardwaj V, Bhuyan B, Bianchi F, Bilka T, Bilokin S, Biswas D, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Branchini P, Braun N, Briere RA, Browder TE, Brown DN, Budano A, Burmistrov L, Bussino S, Campajola M, Cao L, Caria G, Casarosa G, Cecchi C, Červenkov D, Chang M-C, Chang P, Cheaib R, Chekelian V, Chen C, Chen YC, Chen YQ, Chen Y-T, Cheon BG, Chilikin K, Chirapatpimol K, Cho H-E, Cho K, Cho S-J, Choi S-K, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cuesta D, Cunliffe S, Czank T, Dash N, Dattola F, Cruz-Burelo EDL, Nardo GD, Nuccio MD, Pietro GD, Sangro RD, Deschamps B, Destefanis M, Dey S, Yta-Hernandez AD, Canto AD, Capua FD, Carlo SD, Dingfelder J, Doležal Z, Jiménez ID, Dong TV, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Epifanov D, Fast JE, Ferber T, Ferlewicz D, Finocchiaro G, Fiore S, Fischer P, Fodor A, Forti F, Frey A, Friedl M, Fulsom BG, Gabriel M, Gabyshev N, Ganiev E, Garcia-Hernandez M, Garg R, Garmash A, Gaur V, Gaz A, Gebauer U, Gelb M, Gellrich A, Gemmler J, Geßler T, Getzkow D, Giordano R, Giri A, Glazov A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gomis P, Grace P, Gradl W, Graziani E, Greenwald D, Guan Y, Hadjivasiliou C, Halder S, Hara K, Hara T, Hartbrich O, Hauth T, Hayasaka K, Hayashii H, Hearty C, Heck M, Hedges MT, Cruz IHDL, Villanueva MH, Hershenhorn A, Higuchi T, Hill EC, Hirata H, Hoek M, Hohmann M, Hollitt S, Hotta T, Hsu C-L, Hu Y, Huang K, Iijima T, Inami K, Inguglia G, Jabbar JI, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Iwata S, Jackson P, Jacobs WW, Jaegle I, Jaffe DE, Jang E-J, Jeandron M, Jeon HB, Jia S, Jin Y, Joo C, Joo KK, Kadenko I, Kahn J, Kakuno H, Kaliyar AB, Kandra J, Kang KH, Kapusta P, Karl R, Karyan G, Kato Y, Kawai H, Kawasaki T, Keck T, Ketter C, Kichimi H, Kiesling C, Kim BH, Kim C-H, Kim DY, Kim HJ, Kim JB, Kim K-H, Kim K, Kim S-H, Kim Y-K, Kim Y, Kimmel TD, Kindo H, Kinoshita K, Kirby B, Kleinwort C, Knysh B, Kodyš P, Koga T, Kohani S, Komarov I, Konno T, Korpar S, Kovalchuk N, Kraetzschmar TMG, Križan P, Kroeger R, Krohn JF, Krokovny P, Krüger H, Kuehn W, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kumita T, Kunigo T, Künzel M, Kurz S, Kuzmin A, Kvasnička P, Kwon Y-J, Lacaprara S, Lai Y-T, Licata CL, Lalwani K, Lanceri L, Lange JS, Lautenbach K, Laycock PJ, Diberder FRL, Lee I-S, Lee SC, Leitl P, Levit D, Lewis PM, Li C, Li C-H, Li LK, Li SX, Li YM, Li YB, Libby J, Lieret K, Gioi LL, Lin J, Liptak Z, Liu QY, Liu ZA, Liventsev D, Longo S, Loos A, Lu P, Lubej M, Lueck T, Luetticke F, Luo T, MacQueen C, Maeda Y, Maggiora M, Maity S, Manfredi R, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuda T, Matsuoka K, Matvienko D, McNeil J, Meggendorfer F, Mei JC, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Azmi K, Mohanty GB, Moon H, Moon T, Grimaldo JAM, Morda A, Morii T, Moser H-G, Mrvar M, Mueller F, Müller FJ, Muller T, Muroyama G, Murphy C, Mussa R, Nakagiri K, Nakamura I, Nakamura KR, Nakano E, Nakao M, Nakayama H, Nakazawa H, Nanut T, Natkaniec Z, Natochii A, Nayak M, Nazaryan G, Neverov D, Niebuhr C, Niiyama M, Ninkovic J, Nisar NK, Nishida S, Nishimura K, Nishimura M, Nouxman MHA, Oberhof B, Ogawa K, Ogawa S, Olsen SL, Onishchuk Y, Ono H, Onuki Y, Oskin P, Oxford ER, Ozaki H, Pakhlov P, Pakhlova G, Paladino A, Pang T, Panta A, Paoloni E, Pardi S, Park C, Park H, Park S-H, Paschen B, Passeri A, Pathak A, Patra S, Paul S, Pedlar TK, Peruzzi I, Peschke R, Pestotnik R, Piccolo M, Piilonen LE, Podesta-Lerma PLM, Polat G, Popov V, Praz C, Prencipe E, Prim MT, Purohit MV, Rad N, Rados P, Raiz S, Rasheed R, Reif M, Reiter S, Remnev M, Resmi PK, Ripp-Baudot I, Ritter M, Ritzert M, Rizzo G, Rizzuto LB, Robertson SH, Pérez DR, Roney JM, Rosenfeld C, Rostomyan A, Rout N, Rozanska M, Russo G, Sahoo D, Sakai Y, Sanders DA, Sandilya S, Sangal A, Santelj L, Sartori P, Sasaki J, Sato Y, Savinov V, Scavino B, Schram M, Schreeck H, Schueler J, Schwanda C, Schwartz AJ, Schwenker B, Seddon RM, Seino Y, Selce A, Senyo K, Seong IS, Serrano J, Sevior ME, Sfienti C, Shebalin V, Shen CP, Shibuya H, Shiu J-G, Shwartz B, Sibidanov A, Simon F, Singh JB, Skambraks S, Smith K, Sobie RJ, Soffer A, Sokolov A, Soloviev Y, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Strube J, Stypula J, Sumihama M, Sumisawa K, Sumiyoshi T, Summers DJ, Sutcliffe W, Suzuki K, Suzuki SY, Svidras H, Tabata M, Takahashi M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Tanigawa H, Taniguchi N, Tao Y, Taras P, Tenchini F, Tonelli D, Torassa E, Trabelsi K, Tsuboyama T, Tsuzuki N, Uchida M, Ueda I, Uehara S, Ueno T, Uglov T, Unger K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Vahsen SE, Tonder RV, Varner GS, Varvell KE, Vinokurova A, Vitale L, Vorobyev V, Vossen A, Wach B. Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data. 2020 Sep 20;

Publication Date

September 20, 2020