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Search for the decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:mi>γ</mml:mi></mml:math> using Belle and Belle II data
I. Adachi, L. Aggarwal, H. Aihara, Н. Акопов, A. Aloisio, S. Al Said, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, A. Baur, A. Beaubien, F. Becherer, Jürgen Becker, K. Belous, J. V. Bennett, F. U. Bernlochner, V. Bertacchi, E. Bertholet, M. Bessner, S. Bettarini, B. Bhuyan, F. Bianchi, L. Bierwirth, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, A. E. Bolz, J. Borah, A. Boschetti, A. Bożek, M. Bračko, P. Branchini, R. A. Briere, T. E. Browder, A. Budano, S. Bussino, Q. Campagna, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, J. Cerasoli, M.-C. Chang, P. Chang, P. Cheema, C. Chen, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, S. Choudhury, L. Corona, J. X. Cui, F. Dattola, E. De La Cruz–Burelo, S. A. De La Motte, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, S. Dey, R. Dhamija, A. Di Canto, F. Di Capua, J. Dingfelder, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, M. Dorigo, D. Dorner, K. Dort, D. Dossett, S. Dreyer, S. Dubey, K. Dugic, G. Dujany, P. Ecker, M. Eliachevitch, D. Epifanov, P. Feichtinger, T. Ferber, T. Fillinger, C. Finck, G. Finocchiaro, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, E. Ganiev, M. Garcia-Hernandez, G. Gaudino, V. Gaur, A. Gaz, A. Gellrich, G. Ghevondyan, D. Ghosh, H. Ghumaryan, G. Giakoustidis, R. Giordano, A. Giri, A. Glazov, B. Gobbo, R. Godang, O. Gogota, P. Goldenzweig, W. Gradl, E. Graziani, D. Greenwald, Z. Gruberová, T. Gu, K. Gudkova, I. Haide, Y. Han, T. Hara, C. Harris, 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, P. Horak, C.-L. Hsu, T. Humair, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, P. Jackson, W. W. Jacobs, D. E. Jaffe, E.-J. Jang, S. Jia, Y. Jin, A. Johnson, K. K. Joo, H. Junkerkalefeld, D. Kalita, A. B. Kaliyar, J. Kandra, K. H. Kang, S. Kang, G. Karyan, T. Kawasaki, F. Keil, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, H. Kindo, K. Kinoshita, P. Kodyš, T. Koga, S. Kohani, K. Kojima, A. Korobov, S. Korpar, E. Kovalenko, R. Kowalewski, P. Križan, P. Krokovny, T. Kuhr, Y. Kulii, J. Kumar, R. Kumar, K. Kumara, T. Kunigo, A. Kuzmin, Y.-J. Kwon, S. Lacaprara, K. Lalwani, T. Lam, J. S. Lange, M. Laurenza, R. Leboucher, M. J. Lee, C. Lemettais, P. Leo, D. Levit, L. K. Li, S. X. Li, Y. Li, Y. B. Li, J. Libby, Z. Liptak, M. H. Liu, Q. Y. Liu, Zhiqing Liu, D. Liventsev, S. Longo, T. Lueck, C. Lyu, Yue Ma, M. Maggiora, S. P. Maharana, R. Maiti, S. Maity, G. Mancinelli, R. Manfredi, E. Manoni, M. Mantovano, D. Marcantonio, S. Marcello, C. Mariñas, C. Martellini, A. Martens, A. Martini, T. Martinov, L. Massaccesi, M. Masuda, K. Matsuoka, D. Matvienko, S. K. Maurya, J. A. McKenna, F. Meier, M. Merola, F. Metzner, C. Miller, M. Mirra, S. Mitra, K. Miyabayashi, G. B. Mohanty, S. Mondal, S. Moneta, H.-G. Moser, M. Mrvar, I. Nakamura, M. Nakao, Y. Nakazawa, M. Naruki, D. Narwal, Z. Natkaniec, A. Natochii, M. Nayak, G. Nazaryan, M. Neu, M. Niiyama, S. Nishida, S. Ogawa, Y. Onishchuk, H. Ono, G. Pakhlova, S. Pardi, K. Parham, H. Park, J. Park, S.-H. Park, B. Paschen, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Peschke, R. Pestotnik, M. Piccolo, L. E. Piilonen, G. Pinna Angioni, P. L. M. Podesta-Lerma, T. Podobnik, S. Pokharel, C. Praz, S. Prell, E. Prencipe, M. T. Prim, I. Prudiiev, H. Purwar, P. Rados, G. Raeuber, S. Raiz, N. Rauls, M. Reif, S. Reiter, M. Remnev, L. Reuter, I. Ripp-Baudot, G. Rizzo, S. H. Robertson, M. Röhrken, J. M. Roney, A. Rostomyan, N. Rout, S. Sandilya, L. Šantelj, Y. Sato, V. Savinov, B. Scavino, S. Schneider, G. Schnell, M. Schnepf, K. Schoenning, C. Schwanda, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, W. Shan, C. Sharma, C. P. Shen, X. Shi, T. Shillington, T. Shimasaki, J.-G. Shiu, D. Shtol, A. Sibidanov, F. Simon, J. B. Singh, J. Skorupa, R. Sobie, M. Sobotzik, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Starič, P. Stavroulakis, S. Stefkova, R. Stroili, Y. Sue, M. Sumihama, N. Suwonjandee, H. Svidras, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, A. Thaller, O. Tittel, R. Tiwary, D. Tonelli, E. Torassa, K. Trabelsi, I. Ueda, T. Uglov, K. Unger, Y. Unno, K. Uno, S. Uno, Y. Ushiroda, S. Vahsen, R. van Tonder, K. E. Varvell, M. Veronesi, A. Vinokurova, V. S. Vismaya, L. Vitale, V. Vobbilisetti, R. Volpe, A. Vossen, B. Wach, M. Wakai, S. Wallner, E. Wang, M.-Z. Wang, X. L. Wang, Z. Wang, A. Warburton, S. Watanuki, C. Wessel, E. Won, Y. G. Xie, X. P. Xu, B. Yabsley, S. Yamada, W. B. Yan, S. B. Yang, J. Yelton, J. H. Yin, Y. Yook, K. Yoshihara, C. Z. Yuan, Y. Yusa, L. Zani, F. Zeng, Boyang Zhang, V. Zhilich, J. S. Zhou, Q. Zhou, V. Zhukova, R. Žlebčík
Bibliographic record
VenuePhysical review. D/Physical review. D. · 2024
Typearticle
Languagelv
FieldPhysics and Astronomy
TopicParticle physics theoretical and experimental studies
Canadian institutionsnot available
FundersH2020 Marie Skłodowska-Curie ActionsH2020 European Research CouncilCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalAkademi Sains MalaysiaJapan Society for the Promotion of ScienceDeutsches Elektronen-SynchrotronAustralian Research CouncilSeventh Framework ProgrammeKorea Research Environment Open NetworkKementerian Pendidikan MalaysiaPacific Northwest National LaboratoryIstituto Nazionale di Fisica NucleareMinistry of Science and Higher Education of the Russian FederationNational Research University Higher School of EconomicsMinisterio de Ciencia e InnovaciónEuropean Research CouncilMax-Planck-GesellschaftCentre National de la Recherche ScientifiqueMinistry of Education and Science of UkraineNarodowe Centrum NaukiMinisterstwo Edukacji i NaukiKnut och Alice Wallenbergs StiftelseNational Key Research and Development Program of ChinaIsrael Science FoundationNational Natural Science Foundation of ChinaNational Research Foundation of KoreaMinistry of Culture and SportKorea Institute of Science and TechnologyNatural Sciences and Engineering Research Council of CanadaMinistry of Education, Culture, Sports, Science and TechnologyBundesministerium für Bildung und ForschungAustrian Science FundGrantová Agentura České RepublikyNational Research FoundationJavna Agencija za Raziskovalno Dejavnost RSSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungBundesministerium für Bildung, Wissenschaft und KulturAlexander von Humboldt-StiftungKorea Institute of Science and Technology InformationDepartment of Atomic Energy, Government of IndiaHigh Energy Accelerator Research OrganizationDeutsche ForschungsgemeinschaftNational Research Foundation of UkraineUniversiti MalayaMinistry of EducationDepartment of Science and Technology, Ministry of Science and Technology, IndiaInstitut National de Physique Nucléaire et de Physique des ParticulesUniversity of Petroleum and Energy StudiesGeneralitat ValencianaUnited States-Israel Binational Science FoundationThailand Center of Excellence in PhysicsHelmholtz-GemeinschaftIstituto Nazionale di Fisica Nucleare Sezione di PadovaNatural Science Foundation of Shandong ProvinceCompute CanadaUniversity of TabukVietnam Academy of Science and TechnologyCanarieAgencia Estatal de InvestigaciónSecretaría de Educación PúblicaTürkiye Bilimsel ve Teknolojik Araştırma KurumuAgence Nationale de la RechercheGrantová Agentura, Univerzita KarlovaU.S. Department of EnergyNational Science FoundationIkerbasque, Basque Foundation for ScienceNational Science and Technology Council
KeywordsPhysicsAlgorithmMathematics
Abstract
We report the result of a search for the rare decay B0→γγ using a combined dataset of 753×106 BB¯ pairs collected by the Belle experiment and 387×106 BB¯ pairs collected by the Belle II experiment from decays of the ϒ(4S) resonance produced in e+e− collisions. A simultaneous fit to the Belle and Belle II data sets yields 11.0−5.5+6.5 signal events, corresponding to a 2.5σ significance. We determine the branching fraction B(B0→γγ)=(3.7−1.8+2.2(stat)±0.5(syst))×10−8 and set a 90% credibility level upper limit of B(B0→γγ)<6.4×10−8 . Published by the American Physical Society 2024
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
metaresearch head score (Codex)0.002
metaresearch head score (Gemma)0.004
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.019
Threshold uncertainty score0.062
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.004 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.004 | 0.005 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.019 | 0.014 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
Opus teacher head0.032
GPT teacher head0.346
Teacher spread0.314 · how far apart the two teachers sit on this one work
Validation status
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".
Quick stats
Citations4
Published2024
Admission routes1
Has abstractyes