Model-independent measurement of D0−D¯0 mixing parameters in D0→KS0π π− decays at Belle and Belle II

I Adachi; L Aggarwal; H Ahmed; H Aihara; N Akopov; A Aloisio; N Althubiti; N Anh Ky; DM Asner; H Atmacan; V Aushev; M Aversano; R Ayad; NK Baghel; P Bambade; Sw Banerjee; S Bansal; M Barrett; M Bartl; J Baudot; A Beaubien; J Becker; JV Bennett; V Bertacchi; M Bertemes; E Bertholet; M Bessner; S Bettarini; B Bhuyan; D Biswas; D Bodrov; A Bolz; A Bondar; A Boschetti; A Bozek; M Bračko; P Branchini; RA Briere; TE Browder; A Budano; S Bussino; Q Campagna; M Campajola; G Casarosa; C Cecchi; 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; J Cochran; L Corona; JX Cui; S Das; E De La Cruz-Burelo; SA De La Motte; G De Pietro; R de Sangro; M Destefanis; A Di Canto; F Di Capua; J Dingfelder; Z Doležal; TV Dong; M Dorigo; D Dossett; G Dujany; P Ecker; D Epifanov; J Eppelt; P Feichtinger; T Ferber; T Fillinger; C Finck; G Finocchiaro; A Fodor; F Forti; BG Fulsom; A Gabrielli; E Ganiev; 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; P Gironella Gironell; A Glazov; B Gobbo; R Godang; P Goldenzweig; G Gong; W Gradl; E Graziani; D Greenwald; Z Gruberová; K Gudkova; I Haide; T Hara; K Hayasaka; H Hayashii; S Hazra; C Hearty; MT Hedges; A Heidelbach; I Heredia de la Cruz; T Higuchi; M Hoek; M Hohmann; R Hoppe; C-L Hsu; T Humair; T Iijima; K Inami; N Ipsita; R Itoh; M Iwasaki; WW Jacobs; E-J Jang; QP Ji; Y Jin; A Johnson; H Junkerkalefeld; AB Kaliyar; J Kandra; G Karyan; F Keil; C Kiesling; C-H Kim; DY Kim; J-Y Kim; K-H Kim; Y-K Kim; K Kinoshita; P Kodyš; T Koga; S Kohani; K Kojima; A Korobov; E Kovalenko; R Kowalewski; P Križan; P Krokovny; T Kuhr; R Kumar; K Kumara; T Kunigo; A Kuzmin; Y-J Kwon; K Lalwani; T Lam; JS Lange; TS Lau; R Leboucher; FR Le Diberder; MJ Lee; C Lemettais; P Leo; C Li; LK Li; QM Li; WZ Li; Y Li; YB Li; J Libby; MH Liu; QY Liu; ZQ Liu; D Liventsev; S Longo; T Lueck; C Lyu; C Madaan; M Maggiora; R Maiti; G Mancinelli; R Manfredi; E Manoni; M Mantovano; S Marcello; C Marinas; C Martellini; A Martens; A Martini; T Martinov; L Massaccesi; M Masuda; D Matvienko; SK Maurya; M Maushart; JA McKenna; F Meier; M Merola; C Miller; M Mirra; S Mitra; K Miyabayashi; GB Mohanty; S Mondal; S Moneta; H-G Moser; R Mussa; I Nakamura; M Nakao; H Nakazawa; Y Nakazawa; M Naruki; Z Natkaniec; A Natochii; M Nayak; G Nazaryan; M Neu; S Nishida; S Ogawa; H Ono; ER Oxford; G Pakhlova; S Pardi; K Parham; H Park; J Park; K Park; S-H Park; B Paschen; A Passeri; S Patra; TK Pedlar; R Peschke; LE Piilonen; PLM Podesta-Lerma; T Podobnik; C Praz; S Prell; E Prencipe; MT Prim; H Purwar; S Raiz; JU Rehman; M Reif; S Reiter; L Reuter; D Ricalde Herrmann; I Ripp-Baudot; G Rizzo; M Roehrken; JM Roney; A Rostomyan; N Rout; DA Sanders; S Sandilya; L Santelj; V Savinov; B Scavino; C Schwanda; AJ Schwartz; Y Seino; A Selce; K Senyo; J Serrano; ME Sevior; C Sfienti; W Shan; CP Shen; XD Shi; T Shillington; J-G Shiu; D Shtol; A Sibidanov; F Simon; 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; H Svidras; M Takizawa; K Tanida; F Tenchini; O Tittel; R Tiwary; E Torassa; K Trabelsi; M Uchida; I Ueda; T Uglov; K Unger; Y Unno; K Uno; S Uno; P Urquijo; SE Vahsen; R van Tonder; KE Varvell; M Veronesi; A Vinokurova; VS Vismaya; L Vitale; R Volpe; M Wakai; S Wallner; M-Z Wang; A Warburton; M Watanabe; S Watanuki; C Wessel; BD Yabsley; S Yamada; W Yan; JH Yin; K Yoshihara; J Yuan; Z Zhang; V Zhilich; JS Zhou; QD Zhou; L Zhu; VI Zhukova; R Žlebčík

Journal article

Model-independent measurement of D0−D¯0 mixing parameters in D0→KS0π π− decays at Belle and Belle II

I Adachi, L Aggarwal, H Ahmed, H Aihara, N Akopov, A Aloisio, N Althubiti, N Anh Ky, DM Asner, H Atmacan, V Aushev, M Aversano, R Ayad, NK Baghel, P Bambade, Sw Banerjee, S Bansal, M Barrett, M Bartl, J Baudot Show all

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

DOI: 10.1103/7p5s-f9qp

Abstract

We perform a model-independent measurement of the D0−D¯0 mixing parameters using samples of e+e− -collision data collected by the Belle and Belle II experiments that have integrated luminosities of 951 fb−1 and 408 fb−1, respectively. Approximately 2.05×106 neutral D mesons are reconstructed in the D0→KS0π+π− channel, with the neutral D flavor tagged by the charge of the pion in the D*+→D0π+ decay. Assuming charge-parity symmetry, the mixing parameters are measured to be x=(4.0±1.7±0.4)×10−3 and y=(2.9±1.4±0.3)×10−3, where the first uncertainties are statistical and the second systematic. The results are consistent with previous determinations.