| Title: |
Measurement of time-dependent CP asymmetries in ${B}^{0}\to {K}_{\text{S}}^{0}{\pi }^{+}{\pi }^{-}\gamma $ decays at Belle and Belle II |
| Authors: |
Abumusabh, Merna; Adachi, Ichiro; Nguyen, Anh-Ky; Giordano, Raffaele; Giri, Anjan; Gironella Gironell, Pere; Godang, Romulus; Gogota, Olga; Goldenzweig, Pablo; Gradl, Wolfgang; Graziani, Enrico; Greenwald, Daniel; Guan, Yinghui; Asner, David Mark; Gudkova, Kristina; Haide, Isabel; Han, Yubo; Hayashii, Hisaki; Hazra, Sagar; Hedges, Michael Thomas; Heidelbach, Alexander; Heine, Greta; Heredia de la Cruz, Ivan; Hernandez Villanueva, Michel; Atmacan, Hulya; Higuchi, Takeo; Hohmann, Marcel; Hoppe, Raimundo; Horak, Philipp; Hou, Xiantao; Hsu, Chia-Ling; Humair, Thibaud; Iijima, Toru; Ipsita, N. Sushree; Ishikawa, Akimasa; Aushev, Tagir; Itoh, Ryosuke; Iwasaki, Masako; Jackson, Paul Douglas; Jacobs, William Wescott; Jang, Eunji; Jia, Sen; Jin, Yifan; Johnson, Ansu; Kang, Kookhyun; Keil, Felix; Ayad, Rachid; Ketter, Christopher; Kiesling, Christian; Kim, Doris Yangsoo; Kim, Jaeyoung; Kim, Kyungho; Kindo, Haruki; Kinoshita, Kay; Kodys, Peter; Koga, Taichiro; Kohani, Shahab; Babu, Varghese; Kojima, Kazuki; Korobov, Alexandr; Korpar, Samo; Kovalenko, Evgeniy; Kowalewski, Robert; Krizan, Peter; Krokovny, Pavel; Kuhr, Thomas; Kulii, Yaroslav; Kumar, Devender; Bahinipati, Seema; Kumar, Rajeev; Kumara, Kospalage Janaka; Kunigo, Takuto; Kwon, Youngjoon; Lacaprara, Stefano; Lam, Tommy; Lau, Tak Shun; Laurenza, Martina; Le Diberder, Francois Rene; Lee, Hobin; Bambade, Philip; Lee, MyeongJae; Leo, Paolo; Li, Chunhua; Li, Huijing; Li, Longke; Li, Qiming; Li, Wenzhe; Li, Yang; Li, Yubo; Liao, Yipu; Banerjee, Sw.; Libby, James Frederick; Lin, Jie-Cheng; Lin, Shu-Ping; Liptak, Zachary John; Liu, Meihong; Liu, Qingyuan; Liu, Zhiqing; Liventsev, Dmitri; Longo, Savino; Lueck, Thomas; Barrett, Matthew; Lyu, Chaoyi; Ma, Junli; Ma, Yue; Maggiora, Marco; Maiti, Rajesh Kumar; Mancinelli, Giampiero; Manfredi, Riccardo; Manoni, Elisa; Mantovano, Michele; Marcantonio, Daniel; Aggarwal, Latika; Bartl, Martin; Marinas, Carlos; Martellini, Cristina; Martens, Aurelien; Martinov, Tommy; Massaccesi, Ludovico; Masuda, Masataka; Maurya, Shubhangi Krishan; Maushart, Matteo Manuel; McKenna, Janis Anne; Mediankin Gruberova, Zuzana; Baudot, Jerome; Meier, Frank; Meleshko, Dmytro; Merola, Mario; Miller, Caleb; Mirra, Marco; Miyabayashi, Kenkichi; Miyake, Hideki; Moneta, Stefano; Moreira de Carvalho, Ana Luisa; Moser, Hans-Guenther; Beaubien, Alexandre; Murakami, Hikari; Mussa, Roberto; Nakamura, Isamu; Nakao, Mikihiko; Natkaniec, Zbigniew Marian; Natochii, Andrii; Nayak, Minakshi; Neu, Marc; Nishida, Shohei; Nomaru, Riku; Becherer, Fabian Horst; Ogawa, Satoru; Okubo, Ryogo; Ono, Hiroaki; Pakhlova, Galina; Panta, Anil; Pardi, Silvio; Park, Junewoo; Park, Seokhee; Passeri, Antonio; Patra, Sourav; Becker, Juergen; Paul, Stephan Martin; Pedlar, Todd Kristofer; Pestotnik, Rok; Piccolo, Marcello; Piilonen, L. E.; Podobnik, Tomaz; Praz, Cyrille; Prell, Soeren; Prencipe, Elisabetta; Prim, Markus Tobias; Bennett, Jake; Purwar, Harsh; Rados, Petar; Raiz, Sebastiano; Ravindran, Krishnakumar; Ur Rehman, Junaid; Reif, Markus; Reiter, Simon; Reuter, Lea; Ricalde Herrmann, Daniel Enrique; Ripp-Baudot, Isabelle; Bertacchi, Valerio; Rizzo, Giuliana; Robertson, Steven H.; Roney, John Michael; Rostomyan, Armine; Rout, Niharika; Saha, Sahil; Salutari, Laura; Sanders, David Alan; Sandilya, Saurabh; Santelj, Luka; Bertholet, Emilie; Scavino, Bianca; Schnell, Gunar; Schnepf, Matthias Jochen; Schoenning, Karin; Schwanda, Christoph; Seino, Yoshiaki; Senyo, Katsumi; Sfienti, Concettina; Shan, Wei; Shi, Xiaodong; Bessner, Martin; Shillington, Trevor; Shimasaki, Tomoyuki; Shiu, Jing-Ge; Shtol, Dmitry; Sibidanov, Alexei; Simon, Frank; Skorupa, Justin; Sobie, Randall; Sobotzik, Martin; Soffer, Abner; Bettarini, Stefano; Solovieva, Elena; Spataro, Stefano; Spruck, Bjoern; Staric, Marko; Stavroulakis, Petros; Stefkova, Slavomira; Stroili, Roberto; Sumihama, Mizuki; Sumisawa, Kazutaka; Svidras, Henrikas; Ahmed, Hossain; Bhardwaj, Vishal; Takahashi, Maiko; Takizawa, Makoto; Tamponi, Umberto; Tang, ShiShuai; Tanida, Kiyoshi; Tenchini, Francesco; Tran, Tien Manh; Tittel, Oskar; Tiwary, Rahul; Torassa, Ezio; Bhuyan, Bipul; Trabelsi, Karim; Trantou, Foteini Faidra; Tsaklidis, Ilias; Ueda, Ikuo; Unger, Kai Lukas; Unno, Yuji; Uno, Kenta; Uno, Shoji; Urquijo, Phillip; Vahsen, Sven Einar; Bianchi, Fabrizio; van Tonder, Raynette; Varvell, Kevin Ernest; Veronesi, Michele; Vismaya, V. S.; Vitale, Lorenzo; Vobbilisetti, Vidya Sagar; Volpe, Roberta; Wakai, Miho; Wallner, Stefan; Wang, Min-Zu; Bilka, Tadeas; Warburton, Andreas; Watanuki, Shun; Wessel, Christian; Xu, Xinping; Yabsley, Bruce Donald; Yan, Wenbiao; Yelton, John; Yi, Kai; Yin, Junhao; Yoshihara, Keisuke; Biswas, Diptaparna; Yuan, Changzheng; Yuan, Jing; Zani, Laura; Zeyrek, Mehmet Tevfik; Zhang, Boyang; Zhilich, Victor; Zhou, Jianshe; Zhou, Qi-Dong; Zhu, Lin; Zlebcik, Radek; Bobrov, Alexander; Belle Collaboration; Belle-II Collaboration; Bodrov, Denis; Borah, Jyotirmoi; Boschetti, Alessandro; Bozek, Andrzej; Ahn, YongHeon; Bracko, Marko; Branchini, Paolo; Briere, R. A.; Browder, Thomas Earl; Budano, Antonio; Bussino, Severino; Campagna, Quinn; Campajola, Marcello; Casarosa, Giulia; Cecchi, Claudia; Aihara, Hiroaki; Cheema, Priyanka; Chen, Chunhui; Chen, Liangliang; Cheshta, Cheshta; Chetri, Hridey; Chin, Jeffrey; Chirapatpimol, Khem; Cho, HanEol; Cho, Kihyeon; Cho, Sungjin; Akopov, Norayr; Choi, Sookyung; Choudhury, Seema; Colorado, Johan Andres; Corona, Luigi; Cui, Junxi; De La Cruz Burelo, Eduard; De La Motte, Shanette Anne; De Nardo, Guglielmo; De Pietro, Giacomo; de Sangro, Riccardo; Alghamdi, Saleh; Destefanis, Marco; Di Canto, Angelo; Dolezal, Zdenek; Dominguez Jimenez, Isabel; Dong, Thanh Van; Dong, Xu; Dorigo, Mirco; Dujany, Giulio; Ecker, Patrick; Eppelt, Jonas; Alhakami, Mohammad Hasan; Farkas, Ralf; Feichtinger, Paul; Ferber, Torben; Fillinger, Tristan; Finck, Christian; Finocchiaro, Giuseppe; Forti, Francesco; Fulsom, Bryan Gregory; Gale, Alexander; Garcia Hernandez, Marcela; Amos, Kieran; Garg, Renu; Gaudino, Giovanni; Gaur, Vipin; Gautam, Varsha; Gaz, Alessandro; Gellrich, Andreas; Ghevondyan, Gayane; Ghosh, Debjit; Ghumaryan, Hazaravard; Giakoustidis, Georgios |
| Source: |
Journal of high energy physics 01(1), 134 (2026). doi:10.1007/JHEP01(2026)134 |
| Publisher Information: |
Springer |
| Publication Year: |
2026 |
| Collection: |
DESY Publication Database (PUBDB) |
| Subject Terms: |
info:eu-repo/classification/ddc/530; B Physics; CP Violation; e+-e− Experiments; Flavour Changing Neutral Currents |
| Subject Geographic: |
DE |
| Description: |
We present a measurement of the time-dependent CP asymmetry in ${B}^{0}\to {K}_{\text{S}}^{0}{\pi }^{+}{\pi }^{-}\gamma $ decays using a data set of 365 fb$^{−1}$ recorded by the Belle II experiment and the final data set of 711 fb$^{−1}$ recorded by the Belle experiment at the Υ(4S) resonance. The direct and mixing-induced time-dependent CP violation parameters C and S are determined along with two additional quantities, S$^{+}$ and S$^{−}$, defined in the two halves of the ${m}^{2}\left({K}_{\text{S}}^{0}{\pi }^{+}\right)-{m}^{2}\left({K}_{\text{S}}^{0}{\pi }^{-}\right)$ plane. The measured values are C = −0.17 ± 0.09 ± 0.04, S = −0.29 ± 0.11 ± 0.05, S$^{+}$ = −0.57 ± 0.23 ± 0.10 and S$^{−}$ = 0.31 ± 0.24 ± 0.05, where the first uncertainty is statistical and the second systematic.[graphic not available: see fulltext] |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| ISSN: |
1029-8479; 1126-6708; 1127-2236 |
| Relation: |
info:eu-repo/semantics/altIdentifier/issn/1029-8479; info:eu-repo/semantics/altIdentifier/issn/1126-6708; info:eu-repo/semantics/altIdentifier/arxiv/arXiv:2510.01331; info:eu-repo/semantics/altIdentifier/issn/1127-2236; info:eu-repo/grantAgreement/EC//947006; info:eu-repo/grantAgreement/EC//267104; info:eu-repo/grantAgreement/EC//884719; info:eu-repo/grantAgreement/EC//700525; info:eu-repo/grantAgreement/EC//101026516; info:eu-repo/grantAgreement/EC//822070 |
| Availability: |
https://bib-pubdb1.desy.de/record/646273; https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2026-00796%22 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.E2863AED |
| Database: |
BASE |