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Measurement of the time-integrated CP asymmetry in D0→KS0KS0 decays using Belle and Belle II data

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We measure the time-integrated CP asymmetry in D0→KS0KS0 decays reconstructed in e+e−→cc¯ events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 and 428  fb−1, respectively. The D0 decays are required to originate from the D*+→D0π+ decay, which determines the charm flavor at production time. A control sample of D0→K+K− decays is used to correct for production and detection asymmetries. The result, (−1.4±1.3(stat)±0.1(syst))%, is consistent with previous determinations and with CP symmetry.
American Physical Society (APS)
I. Adachi L. Aggarwal H. Ahmed H. Aihara N. Akopov A. Aloisio N. Althubiti N. Anh Ky D. M. Asner H. Atmacan V. Aushev M. Aversano R. Ayad V. Babu N. K. Baghel S. Bahinipati P. Bambade Sw. Banerjee S. Bansal M. Barrett M. Bartl J. Baudot A. Beaubien J. Becker J. V. Bennett V. Bertacchi M. Bertemes E. Bertholet M. Bessner S. Bettarini B. Bhuyan D. Biswas A. Bobrov D. Bodrov A. Bolz A. Boschetti A. Bozek M. Bračko P. Branchini R. A. Briere T. E. Browder A. Budano S. Bussino Q. Campagna M. Campajola G. Casarosa C. Cecchi J. Cerasoli M.-C. Chang P. Chang R. Cheaib P. Cheema C. Chen B. G. Cheon K. Chilikin K. Chirapatpimol H.-E. Cho K. Cho S.-J. Cho S.-K. Choi S. Choudhury J. Cochran L. Corona J. X. Cui S. Das E. De La Cruz-Burelo S. A. De La Motte G. De Pietro R. de Sangro M. Destefanis A. Di Canto F. Di Capua J. Dingfelder Z. Doležal T. V. Dong M. Dorigo D. Dossett G. Dujany P. Ecker J. Eppelt P. Feichtinger T. Ferber T. Fillinger C. Finck G. Finocchiaro A. Fodor F. Forti B. G. Fulsom A. Gabrielli E. Ganiev 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 W. Gradl E. Graziani D. Greenwald Z. Gruberová Y. Guan K. Gudkova I. Haide T. Hara K. Hayasaka H. Hayashii S. Hazra C. Hearty M. T. Hedges A. Heidelbach I. Heredia de la Cruz M. Hernández Villanueva T. Higuchi M. Hoek M. Hohmann R. Hoppe C.-L. Hsu T. Humair T. Iijima K. Inami N. Ipsita A. Ishikawa R. Itoh M. Iwasaki W. W. Jacobs D. E. Jaffe E.-J. Jang Q. P. Ji S. Jia Y. Jin A. Johnson K. K. Joo H. Junkerkalefeld A. B. Kaliyar J. Kandra G. Karyan F. Keil C. Kiesling C.-H. Kim D. Y. Kim J.-Y. Kim K.-H. Kim Y.-K. Kim K. Kinoshita P. Kodyš T. Koga S. Kohani K. Kojima A. Korobov S. Korpar E. Kovalenko R. Kowalewski P. Križan P. Krokovny T. Kuhr K. Kumara T. Kunigo A. Kuzmin Y.-J. Kwon S. Lacaprara Y.-T. Lai K. Lalwani T. Lam J. S. Lange T. S. Lau M. Laurenza R. Leboucher F. R. Le Diberder M. J. Lee C. Lemettais P. Leo C. Li L. K. Li Q. M. Li W. Z. Li Y. B. Li Y. P. Liao J. Libby M. H. Liu Q. Y. Liu Y. Liu Z. Q. Liu D. Liventsev S. Longo T. Lueck C. Lyu C. Madaan M. Maggiora S. P. Maharana R. Maiti 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 S. K. Maurya M. Maushart J. A. McKenna R. Mehta F. Meier M. Merola C. Miller M. Mirra S. Mitra K. Miyabayashi G. B. Mohanty S. Mondal S. Moneta H.-G. Moser R. Mussa I. Nakamura M. Nakao Y. Nakazawa M. Naruki Z. Natkaniec A. Natochii M. Nayak G. Nazaryan M. Neu S. Nishida S. Ogawa H. Ono E. R. Oxford G. Pakhlova S. Pardi K. Parham H. Park J. Park K. Park S.-H. Park B. Paschen A. Passeri S. Patra T. K. Pedlar I. Peruzzi R. Peschke M. Piccolo L. E. Piilonen P. L. M. Podesta-Lerma T. Podobnik C. Praz S. Prell E. Prencipe M. T. Prim H. Purwar S. Raiz N. Rauls J. U. Rehman M. Reif S. Reiter L. Reuter D. Ricalde Herrmann I. Ripp-Baudot G. Rizzo M. Roehrken J. M. Roney A. Rostomyan N. Rout D. A. Sanders S. Sandilya L. Santelj V. Savinov B. Scavino M. Schnepf C. Schwanda Y. Seino A. Selce K. Senyo J. Serrano M. E. Sevior C. Sfienti W. Shan X. D. Shi J.-G. Shiu D. Shtol B. Shwartz A. Sibidanov F. Simon J. Skorupa R. J. Sobie M. Sobotzik A. Soffer A. Sokolov E. Solovieva S. Spataro B. Spruck M. Starič P. Stavroulakis S. Stefkova R. Stroili J. Strube M. Sumihama K. Sumisawa H. Svidras M. Takizawa U. Tamponi K. Tanida F. Tenchini O. Tittel R. Tiwary E. Torassa K. Trabelsi I. Ueda T. Uglov K. Unger Y. Unno K. Uno S. Uno P. Urquijo Y. Ushiroda S. E. Vahsen R. van Tonder K. E. Varvell M. Veronesi A. Vinokurova V. S. Vismaya L. Vitale V. Vobbilisetti R. Volpe M. Wakai S. Wallner M.-Z. Wang A. Warburton M. Watanabe S. Watanuki C. Wessel E. Won B. D. Yabsley S. Yamada W. Yan J. Yelton J. H. Yin K. Yoshihara J. Yuan L. Zani B. Zhang V. Zhilich J. S. Zhou Q. D. Zhou L. Zhu V. I. Zhukova R. Žlebčík
Title: Measurement of the time-integrated CP asymmetry in D0→KS0KS0 decays using Belle and Belle II data
Description:
We measure the time-integrated CP asymmetry in D0→KS0KS0 decays reconstructed in e+e−→cc¯ events collected by the Belle and Belle II experiments.
The corresponding data samples have integrated luminosities of 980 and 428  fb−1, respectively.
The D0 decays are required to originate from the D*+→D0π+ decay, which determines the charm flavor at production time.
A control sample of D0→K+K− decays is used to correct for production and detection asymmetries.
The result, (−1.
4±1.
3(stat)±0.
1(syst))%, is consistent with previous determinations and with CP symmetry.

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