首页|Measurement of $CP$ asymmetries in $B^0\to \phi K^0_S$ decays with Belle II

Measurement of $CP$ asymmetries in $B^0\to \phi K^0_S$ decays with Belle II

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英文摘要

We present a measurement of time-dependent rate asymmetries in $B^0\to \phi K^0_S$ decays to search for non-standard-model physics in $b\to q \overline{q}s$ transitions. The data sample is collected with the Belle II detector at the SuperKEKB asymmetric-energy $e^{+}e^{-}$ collider in 2019-2022 and contains $(387\pm 6)\times 10^6$ bottom-antibottom mesons from $\Upsilon(4S)$ resonance decays. We reconstruct $162\pm17$ signal events and extract the charge-parity ($CP$) violating parameters from a fit to the distribution of the proper-decay-time difference of the two $B$ mesons. The measured direct and mixing-induced $CP$ asymmetries are $A=0.31\pm0.20\pm0.05$ and $S=0.54\pm0.26^{+0.06}_{-0.08}$, respectively, where the first uncertainties are statistical and the second are systematic. The results are compatible with the $CP$ asymmetries observed in $b\to c\overline{c} s$ transitions.

作者：M. Uchida、I. Adachi、A. Baur、S. Das、S. Korpar、A. Gaz、P. Stavroulakis、L. Zani、R. Maiti、H. -G. Moser、P. Krokovny、A. Natochii、S. Paul、A. Ishikawa、C. Hearty、T. Lam、P. Oskin、R. Volpe、S. Granderath、Y. Jin、C. Miller、H. Kindo、M. Maggiora、P. Goldenzweig、K. Lautenbach、H. Ono、M. Masuda、K. Cho、H. Ghumaryan、P. M. Lewis、C. Finck、V. Chekelian、I. Tsaklidis、M. Mirra、R. Tiwary、B. Wach、R. J. Sobie、Y. Unno、M. Destefanis、G. Pakhlova、T. Lueck、K. H. Kang、R. A. Briere、T. Iijima、V. Savinov、Y. Onuki、M. Garcia-Hernandez、X. P. Xu、A. Korobov、S. -J. Cho、K. K. Joo、B. Gobbo、A. Sangal、K. Gudkova、P. Pakhlov、L. B. Rizzuto、T. Fillinger、C. Wessel、T. Shillington、G. Gaudino、C. Li、H. Purwar、M. Schnepf、J. -G. Shiu、M. E. Sevior、G. De Nardo、T. M. G. Kraetzschmar、Y. -K. Kim、P. K. Behera、S. Halder、T. Higuchi、S. Moneta、F. R. Le Diberder、P. Branchini、G. Raeuber、O. Tittel、R. Mehta、P. Chang、J. H. Yin、M. Campajola、I. Ueda、A. Fodor、M. Mantovano、G. De Pietro、S. Yamada、R. Godang、B. G. Cheon、M. Nakao、A. Hershenhorn、F. Becherer、S. Ogawa、M. J. Lee、A. Bolz、R. Giordano、M. Veronesi、N. Rout、A. Sibidanov、G. Russo、A. Bondar、R. Peschke、C. -L. Hsu、M. Bessner、L. Vitale、A. Warburton、H. Atmacan、R. Leboucher、S. Pokharel、C. Kiesling、M. Stari?、L. Massaccesi、T. Matsuda、C. Sharma、P. Urquijo、S. Jia、Z. Q. Liu、D. Ghosh、S. Marcello、B. Scavino、K. Yoshihara、L. Nayak、V. Vobbilisetti、G. B. Mohanty、A. Beaubien、R. de Sangro、M. T. Hedges、N. Ipsita、T. Koga、R. van Tonder、E. Ganiev、B. Paschen、T. Martinov、K. Inami、T. Podobnik、T. K. Pedlar、M. T. Prim、D. Marcantonio、G. Rizzo、T. Hara、Y. Han、C. Martellini、V. S. Vismaya、J. Dingfelder、L. Lanceri、J. Cerasoli、W. Sutcliffe、M. Aversano、S. Pardi、T. E. Browder、L. Aggarwal、S. Uno、S. K. Maurya、N. K. Nisar、K. Matsuoka、Sw. Banerjee、S. Raiz、Z. Dole?al、I. Heredia de la Cruz、A. Thaller、Y. Guan、C. Cecchi、M. -C. Chang、M. Hohmann、S. A. De La Motte、M. Mrvar、Y. Uematsu、T. Grammatico、M. Welsch、I. Nakamura、J. Borah、F. Meier、T. Bilka、J. Kandra、H. M. Wakeling、Y. -J. Kwon、E. Paoloni、J. Strube、R. Itoh、H. -E. Cho、A. Aloisio、A. Frey、A. Bozek、K. Trabelsi、Z. Gruberov¨￠、W. Yan、R. Kowalewski、Y. Ushiroda、P. Bambade、Y. -T. Lai、S. Dreyer、A. Kuzmin、H. Bae、S. Mondal、J. S. Zhou、M. Nayak、E. Won、I. Dom¨anguez Jim¨|nez、M. Barrett、M. Merola、J. Cochran、K. Senyo、K. Hara、V. Aushev、I. Peruzzi、A. Garmash、M. Takahashi、Y. Zhang、B. D. Yabsley、S. Kohani、J. Baudot、R. Manfredi、G. Ghevondyan、G. Mancinelli、N. Rad、H. Ahmed、C. Praz、V. I. Zhukova、G. Karyan、S. Watanuki、C. Sfienti、J. B. Singh、H. Park、F. Forti、S. Ito、D. Biswas、C. Lyu、J. M. Roney、M. Bra?ko、S. Bahinipati、L. Cao、C. Schmitt、S. Bettarini、G. S. Varner、M. Hern¨￠ndez Villanueva、S. Dey、S. B. Yang、G. Casarosa、E. Manoni、P. Feichtinger、E. Wang、B. Bhuyan、A. Budano、Y. Kulii、A. Di Canto、Belle II Collaboration、L. K. Li、V. Zhilich、P. Kri?an、S. Stefkova、E. C. Hill、C. Marinas、P. Horak、K. Miyabayashi、E. Torassa、A. Glazov、M. Bertemes、K. Uno、T. Kuhr、L. E. Piilonen、C. Niebuhr、T. Gu、K. Chirapatpimol、K. Sumisawa、H. Hayashii、R. Stroili、P. Rados、T. Uglov、A. Paladino、G. Nazaryan、P. Leitl、K. E. Varvell、Y. Ma、N. Toutounji、N. Molina-Gonzalez、S. Longo、S. Sandilya、M. Reif、S. H. Robertson、H. Tanigawa、Q. Y. Liu、E. Bertholet、F. Dattola、U. Tamponi、S. Kang、A. Bobrov、C. Schwanda、E. Solovieva、E. Kovalenko、V. Babu、R. Dhamija、F. Simon、T. Kawasaki、A. J. Schwartz、K. Unger、A. Narimani Charan、M. Naruki、Q. D. Zhou、A. Passeri、S. Hazra、A. Martini、Z. S. Stottler、D. Tonelli、M. Takizawa、M. Wakai、S. -K. Choi、A. B. Kaliyar、F. Bianchi、C. -H. Kim、M. Remnev、M. Bauer、J. Skorupa、E. Prencipe、M. -Z. Wang、W. W. Jacobs、M. Kumar、A. Sokolov、P. Jackson、P. L. M. Podesta-Lerma、Y. Yusa、T. V. Dong、T. Konno、M. Iwasaki、A. Selce、K. Kumara、F. Pham、A. Vinokurova、N. Anh Ky、A. Soffer、K. Parham、C. Ketter、E. Graziani、D. M. Asner、H. Junkerkalefeld、S. Tanaka、H. Svidras、L. M. Cremaldi、S. Reiter、M. Roehrken、G. Dujany、G. Giakoustidis、W. Gradl、P. Cheema、M. Milesi、K. Adamczyk、S. E. Vahsen、P. Kody?、M. Eliachevitch、S. Wallner、M. De Nuccio、A. Johnson、W. Shan、M. Sumihama、P. Ecker、D. Matvienko、S. Choudhury、T. Ferber、L. Martel、D. Ferlewicz、D. A. Sanders、A. Lozar、S. Spataro、M. Laurenza、T. Kunigo、S. Prell、R. Mussa、C. Z. Yuan、Q. P. Ji、V. Bertacchi、D. Bodrov、F. Keil、S. Maity、F. Tenchini、E. -J. Jang、S. P. Maharana、K. Hayasaka、N. Akopov、T. Aushev、S. Bussino、B. G. Fulsom、A. Gabrielli、J. V. Bennett、B. Spruck、X. D. Shi、H. Aihara、J. Libby、J. A. McKenna、Y. Nakazawa、A. Gellrich、F. Metzner、L. Polat、A. Giri、R. Pestotnik、D. Y. Kim、S. Dubey、A. Panta、D. Liventsev、D. Greenwald、J. S. Lange、F. Otani、M. Hoek、K. Kojima、S. Nishida、J. Becker、Y. Sato、L. Santelj、J. Serrano、O. Gogota、L. Corona、B. Shwartz、R. Mizuk、Y. Seino、M. Piccolo、G. Finocchiaro、Z. Natkaniec、A. De Yta-Hernandez、M. Watanabe、E. De La Cruz-Burelo、V. Gaur、M. Dorigo、K. Dort、Z. Wang、K. -H. Kim、C. Chen、K. Kinoshita、K. Tanida、A. Rostomyan、D. Shtol、M. Sobotzik、D. Levit、S. -H. Park、F. Di Capua、S. Patra、S. Lacaprara、K. Chilikin、T. Humair、I. Ripp-Baudot

作者单位：

DOI：10.1103/PhysRevD.108.072012

学科分类：物理学

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Ripp-Baudot.Measurement of $CP$ asymmetries in $B^0\to \phi K^0_S$ decays with Belle II[EB/OL].(2023-07-06)[2025-05-08].https://arxiv.org/abs/2307.02802.点此复制

Measurement of $CP$ asymmetries in $B^0\to \phi K^0_S$ decays with Belle II

Measurement of $CP$ asymmetries in $B^0\to \phi K^0_S$ decays with Belle II

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