Record W4415719856 · doi:10.1103/mkx8-cl23

Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>D</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msup> <mml:mo stretchy="false">→</mml:mo> <mml:msup> <mml:mrow> <mml:mi>K</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> </mml:mrow> </mml:msup> <mml:msup> <mml:mrow> <mml:mi>π</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> <mml:msup> <mml:mrow> <mml:mi>e</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> <mml:msup> <mml:mrow> <mml:mi>e</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> branching fraction and search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msup> <mml:mi>D</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:mo stretchy="false">→</mml:mo> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msup> <mml:mi>D</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:mo stretchy="false">→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> decays at Belle

2025· article· en· W4415719856 on OpenAlexfundno aff

I. Adachi, L. Aggarwal, H. Ahmed, Y. H. Ahn, H. Aihara, Н. Акопов, S. A. Al‐Ghamdi, M. Alhakami, A. Aloisio, N. Althubiti, K. R. Amos, M. Angelsmark, N. Anh Ky, C. Antonioli, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, N. K. Baghel, S. Bahinipati, P. Bambade, S. Banerjee, S. Bansal, M. Barrett, M. Bartl, J. Baudot, A. Baur, A. Beaubien, F. Becherer, Jürgen Becker, J. V. Bennett, F. U. Bernlochner, V. Bertacchi, M. Bertemes, E. Bertholet, M. Bessner, S. Bettarini, V. Bhardwaj, B. Bhuyan, F. Bianchi, L. Bierwirth, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, A. E. Bolz, A. Bondar, J. Borah, A. Boschetti, A. Bożek, M. Bračko, P. Branchini, N. Brenny, 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, R. Cheaib, P. Cheema, C. Chen, L. Chen, B. G. Cheon, K. Chilikin, J. Chin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, S. Choudhury, J. Cochran, I. Consigny, L. Corona, J. X. Cui, E. De La Cruz–Burelo, S. A. De La Motte, G. de Marino, G. De Nardo, 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, X. Dong, K. Dort, D. Dossett, S. Dubey, K. Dugic, G. Dujany, P. Ecker, M. Eliachevitch, D. Epifanov, R. Farkas, P. Feichtinger, T. Ferber, T. Fillinger, C. Finck, G. Finocchiaro, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, A. Gabrielli, E. Ganiev, M. Garcia-Hernandez, R. Garg, G. Gaudino, V. Gaur, V. Gautam, A. Gellrich, G. Ghevondyan, D. Ghosh, H. Ghumaryan, G. Giakoustidis, R. Giordano, A. Giri, P. Gironella Gironell, A. Glazov, B. Gobbo, R. Godang, O. Gogota, P. Goldenzweig, E. Graziani, D. Greenwald, Z. Gruberová, T. Gu, Y. Guan, K. Gudkova, I. Haide, S. Halder, Y. Han, T. Hara, C. Harris, K. Hayasaka, H. Hayashii, S. Hazra, M. T. Hedges, A. Heidelbach, I. Heredia-De La Cruz, M. Hernández Villanueva, T. Higuchi, M. Hoek, M. Hohmann, R. HOPPE, P. Horak, C.-L. Hsu, Audrey Huang, T. Humair, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, P. Jackson, D. Jacobi, W. W. Jacobs, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, A. Johnson, K. K. Joo, H. Junkerkalefeld, A. B. Kaliyar, J. Kandra, K. H. Kang, S. Kang, G. Karyan, T. Kawasaki, F. Keil, C. Ketter, C. Kiesling, C. H. Kim, D. Y. Kim, J.-Y. Kim, K.-H. Kim, Y. J. 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, D. Kumar, J. Kumar, M. Kumar, R. Kumar, K. Kumara, T. Kunigo, A. Kuzmin, Y.-J. Kwon, S. Lacaprara, Y.-T. Lai, K. Lalwani, T. Lam, L. Lanceri, J. S. Lange, T. S. Lau, M. Laurenza, K. Lautenbach, R. Leboucher, F. Le Diberder, M. J. Lee, P. Leo, D. Levit, P. Lewis, C. Li, H. J. Li, L. K. Li, Q. M. Li, S. X. Li, W. Z. Li, Y. Li, Y. B. Li, Y. P. Liao, J. Libby, J. Lin, S. Lin, Z. Liptak, M. H. Liu, Q. Y. Liu, Y. Liu, Zhiqing Liu, D. Liventsev, S. Longo, A. Lozar, T. Lueck, C. Lyu, Yue Ma, C. Madaan, 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, T. Matsuda, D. Matvienko, S. K. Maurya, M. Maushart, J. A. McKenna, R. Mehta, F. Meier, D. Meleshko, M. Merola, C. Miller, M. Mirra, S. Mitra, K. Miyabayashi, H. Miyake, R. Mizuk, G. B. Mohanty, S. Mondal, S. Moneta, H.-G. Moser, M. Mrvar, R. Mussa, I. Nakamura, M. Nakao, Y. Nakazawa, M. Naruki, Z. Natkaniec, A. Natochii, M. Nayak, G. Nazaryan, M. Neu, C. Niebuhr, M. Niiyama, S. Nishida, S. Ogawa, Y. Onishchuk, H. Ono, Y. Onuki, F. Otani, E. R. Oxford, P. Pakhlov, G. Pakhlova, E. Paoloni, S. Pardi, K. Parham, H. Park, J. Park, K. Park, S.-H. Park, B. Paschen, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, I. M. Peruzzi, R. Peschke, R. Pestotnik, M. Piccolo, L. E. Piilonen, G. Pinna Angioni, P. L. M. Podesta-Lerma, T. Podobnik, S. Pokharel, A. Prakash, C. Praz, S. Prell, E. Prencipe, M. T. Prim, S. Privalov, I. Prudiiev, H. Purwar, P. Rados, G. Raeuber, S. Raiz, N. Rauls, K. Ravindran, J. U. Rehman, M. Reif, S. Reiter, M. Remnev, L. Reuter, D. Ricalde Herrmann, I. Ripp-Baudot, G. Rizzo, S. H. Robertson, M. Röhrken, J. M. Roney, A. Rostomyan, N. Rout, L. Salutari, D. A. Sanders, S. Sandilya, L. Šantelj, Y. Sato, V. Savinov, B. Scavino, C. Schmitt, J. Schmitz, S. Schneider, G. Schnell, M. Schnepf, C. Schwanda, A. J. Schwartz, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, W. Shan, C. Sharma, G. Sharma, C. P. Shen, X. Shi, T. Shillington, T. Shimasaki, J.-G. Shiu, D. Shtol, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, J. Skorupa, M. Sobotzik, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Starič, P. Stavroulakis, S. Stefkova, R. Stroili, J. Strube, Y. Sue, M. Sumihama, K. Sumisawa, W. Sutcliffe, N. Suwonjandee, H. Svidras, M. Takahashi, M. Takizawa, U. Tamponi, K. Tanida, N. Taniguchi, F. Tenchini, A. Thaller, O. Tittel, R. Tiwary, E. Torassa, K. Trabelsi, F. F. Trantou, I. Tsaklidis, M. Uchida, I. Ueda, T. Uglov, K. Unger, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Ushiroda, S. Vahsen, R. van Tonder, 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, M. Watanabe, S. Watanuki, C. Wessel, E. Won, X. P. Xu, B. Yabsley, S. Yamada, W. B. Yan, W. C. Yan, S. B. Yang, J. Yelton, K. Yi, J. H. Yin, K. Yoshihara, J. Yuan, L. Zani, F. Zeng, M. Zeyrek, Boyang Zhang, V. Zhilich, J. S. Zhou, Q. Zhou, L. Zhu, V. Zhukova, R. Žlebčík

Bibliographic record

VenuePhysical review. D/Physical review. D. · 2025

Typearticle

Languageen

FieldPhysics and Astronomy

TopicQuantum Chromodynamics and Particle Interactions

Canadian institutionsnot available

FundersInstitut National de Physique Nucléaire et de Physique des ParticulesCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalAkademi Sains MalaysiaScience for Equity, Empowerment and Development DivisionJapan Society for the Promotion of ScienceDeutsches Elektronen-SynchrotronAustralian Research CouncilHorizon 2020 Framework ProgrammeKorea Research Environment Open NetworkAlliance de recherche numérique du CanadaPacific Northwest National LaboratoryIstituto Nazionale di Fisica NucleareMinistry of Science and Higher Education of the Russian FederationHORIZON EUROPE Marie Sklodowska-Curie ActionsNational Research University Higher School of EconomicsForskningsrådet om Hälsa, Arbetsliv och VälfärdThailand Center of Excellence in PhysicsBundesministerium für Forschung und TechnologieKnut och Alice Wallenbergs StiftelseMinistry of Culture and SportKorea Institute of Science and TechnologyMinistry of Higher Education, MalaysiaNational Natural Science Foundation of ChinaNational Research Foundation of KoreaAgencia Estatal de InvestigaciónAssociation Nationale de la Recherche et de la TechnologieAgence Nationale de la RechercheKing Saud UniversityAustrian Science FundGrantová Agentura České RepublikyNational Science and Technology CouncilMinisterstvo Školství, Mládeže a TělovýchovyGeneralitat ValencianaHelmholtz-GemeinschaftUnited States-Israel Binational Science FoundationNational Research FoundationJavna Agencija za Raziskovalno Dejavnost RSSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungAlexander von Humboldt-StiftungKorea Institute of Science and Technology InformationNatural Sciences and Engineering Research Council of CanadaMinistry of Education, Culture, Sports, Science and TechnologyDepartment of Atomic Energy, Government of IndiaNational Key Research and Development Program of ChinaIsrael Science FoundationMinistry of Education and Science of UkraineUniverzita Karlova v PrazeCanada Foundation for InnovationBundesministerium für Bildung, Wissenschaft und ForschungDeutsche ForschungsgemeinschaftEuropean Research CouncilCentre National de la Recherche ScientifiqueMax-Planck-GesellschaftNational Research Foundation of UkraineUniversiti MalayaDepartment of Science and Technology, Ministry of Science and Technology, IndiaVietnam Academy of Science and TechnologyNatural Science Foundation of Shandong ProvinceUniversity of TabukTürkiye Bilimsel ve Teknolojik Araştırma KurumuGrantová Agentura, Univerzita KarlovaIstituto Nazionale di Fisica Nucleare Sezione di PadovaIkerbasque, Basque Foundation for ScienceNational Science FoundationUniversity of VictoriaMinisterio de Ciencia e InnovaciónEuropean CommissionU.S. Department of Energy

KeywordsKEKBBranching fractionPionMesonDetectorBranching (polymer chemistry)

DOI10.1103/mkx8-cl23

Abstract

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We present a study of the rare charm meson decays <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:msup> <a:mi>D</a:mi> <a:mn>0</a:mn> </a:msup> <a:mo stretchy="false">→</a:mo> <a:mrow> <a:msup> <a:mi>K</a:mi> <a:mo>+</a:mo> </a:msup> <a:msup> <a:mi>K</a:mi> <a:mo>−</a:mo> </a:msup> <a:msup> <a:mi>e</a:mi> <a:mo>+</a:mo> </a:msup> <a:msup> <a:mi>e</a:mi> <a:mo>−</a:mo> </a:msup> </a:mrow> </a:math> , <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"> <d:msup> <d:mi>π</d:mi> <d:mo>+</d:mo> </d:msup> <d:msup> <d:mi>π</d:mi> <d:mo>−</d:mo> </d:msup> <d:msup> <d:mi>e</d:mi> <d:mo>+</d:mo> </d:msup> <d:msup> <d:mi>e</d:mi> <d:mo>−</d:mo> </d:msup> </d:math> , and <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"> <f:msup> <f:mi>K</f:mi> <f:mo>−</f:mo> </f:msup> <f:msup> <f:mi>π</f:mi> <f:mo>+</f:mo> </f:msup> <f:msup> <f:mi>e</f:mi> <f:mo>+</f:mo> </f:msup> <f:msup> <f:mi>e</f:mi> <f:mo>−</f:mo> </f:msup> </f:math> using a <h:math xmlns:h="http://www.w3.org/1998/Math/MathML" display="inline"> <h:mn>942</h:mn> <h:mtext> </h:mtext> <h:mtext> </h:mtext> <h:msup> <h:mi>fb</h:mi> <h:mrow> <h:mo>−</h:mo> <h:mn>1</h:mn> </h:mrow> </h:msup> </h:math> dataset collected by the Belle detector at the KEKB asymmetric-energy <j:math xmlns:j="http://www.w3.org/1998/Math/MathML" display="inline"> <j:msup> <j:mi>e</j:mi> <j:mo>+</j:mo> </j:msup> <j:msup> <j:mi>e</j:mi> <j:mo>−</j:mo> </j:msup> </j:math> collider. We identify <l:math xmlns:l="http://www.w3.org/1998/Math/MathML" display="inline"> <l:msup> <l:mi>D</l:mi> <l:mn>0</l:mn> </l:msup> </l:math> candidates via the charge of the pion from <n:math xmlns:n="http://www.w3.org/1998/Math/MathML" display="inline"> <n:msup> <n:mi>D</n:mi> <n:mrow> <n:mo>*</n:mo> <n:mo>+</n:mo> </n:mrow> </n:msup> <n:mo stretchy="false">→</n:mo> <n:msup> <n:mi>D</n:mi> <n:mn>0</n:mn> </n:msup> <n:msup> <n:mi>π</n:mi> <n:mo>+</n:mo> </n:msup> </n:math> decays and normalize the branching fractions to <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"> <q:msup> <q:mi>D</q:mi> <q:mn>0</q:mn> </q:msup> <q:mo stretchy="false">→</q:mo> <q:msup> <q:mi>K</q:mi> <q:mo>−</q:mo> </q:msup> <q:msup> <q:mi>π</q:mi> <q:mo>+</q:mo> </q:msup> <q:msup> <q:mi>π</q:mi> <q:mo>−</q:mo> </q:msup> <q:msup> <q:mi>π</q:mi> <q:mo>+</q:mo> </q:msup> </q:math> decays. The branching fraction for decay <t:math xmlns:t="http://www.w3.org/1998/Math/MathML" display="inline"> <t:msup> <t:mi>D</t:mi> <t:mn>0</t:mn> </t:msup> <t:mo stretchy="false">→</t:mo> <t:msup> <t:mi>K</t:mi> <t:mo>−</t:mo> </t:msup> <t:msup> <t:mi>π</t:mi> <t:mo>+</t:mo> </t:msup> <t:msup> <t:mi>e</t:mi> <t:mo>+</t:mo> </t:msup> <t:msup> <t:mi>e</t:mi> <t:mo>−</t:mo> </t:msup> </t:math> is measured to be <w:math xmlns:w="http://www.w3.org/1998/Math/MathML" display="inline"> <w:mrow> <w:mo stretchy="false">(</w:mo> <w:mn>39.6</w:mn> <w:mo>±</w:mo> <w:mn>4.5</w:mn> <w:mtext> </w:mtext> <w:mo stretchy="false">(</w:mo> <w:mi>stat</w:mi> <w:mo stretchy="false">)</w:mo> <w:mo>±</w:mo> <w:mn>2.9</w:mn> <w:mtext> </w:mtext> <w:mo stretchy="false">(</w:mo> <w:mi>syst</w:mi> <w:mo stretchy="false">)</w:mo> <w:mo stretchy="false">)</w:mo> <w:mo>×</w:mo> <w:msup> <w:mrow> <w:mn>10</w:mn> </w:mrow> <w:mrow> <w:mo>−</w:mo> <w:mn>7</w:mn> </w:mrow> </w:msup> </w:mrow> </w:math> , with the dielectron mass in the <eb:math xmlns:eb="http://www.w3.org/1998/Math/MathML" display="inline"> <eb:mi>ρ</eb:mi> <eb:mo>/</eb:mo> <eb:mi>ω</eb:mi> </eb:math> mass region <gb:math xmlns:gb="http://www.w3.org/1998/Math/MathML" display="inline"> <gb:mn>675</gb:mn> <gb:mo><</gb:mo> <gb:msub> <gb:mi>m</gb:mi> <gb:mrow> <gb:mi>e</gb:mi> <gb:mi>e</gb:mi> </gb:mrow> </gb:msub> <gb:mo><</gb:mo> <gb:mn>875</gb:mn> <gb:mtext> </gb:mtext> <gb:mtext> </gb:mtext> <gb:mrow> <gb:mrow> <gb:mi>MeV</gb:mi> <gb:mo>/</gb:mo> </gb:mrow> <gb:msup> <gb:mi>c</gb:mi> <gb:mn>2</gb:mn> </gb:msup> </gb:mrow> </gb:math> . We also search for <ib:math xmlns:ib="http://www.w3.org/1998/Math/MathML" display="inline"> <ib:msup> <ib:mi>D</ib:mi> <ib:mn>0</ib:mn> </ib:msup> <ib:mo stretchy="false">→</ib:mo> <ib:msup> <ib:mi>h</ib:mi> <ib:mo>−</ib:mo> </ib:msup> <ib:msup> <ib:mi>h</ib:mi> <ib:mrow> <ib:mo stretchy="false">(</ib:mo> <ib:mo>′</ib:mo> <ib:mo stretchy="false">)</ib:mo> <ib:mo>+</ib:mo> </ib:mrow> </ib:msup> <

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 distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.016

metaresearch head score (Gemma)0.016

Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated

Candidate categoriesMetaresearch, Meta-epidemiology (narrow), Meta-epidemiology (broad), Science and technology studies, Scholarly communication, Open science, Research integrity, Insufficient payload (model declined to judge)

Consensus categoriesMeta-epidemiology (narrow), Science and technology studies, Scholarly communication, Open science, Research integrity, Insufficient payload (model declined to judge)

DomainCandidate signal: none · Consensus signal: none

Study designCandidate signal: Bench or experimental · Consensus signal: none

GenreCandidate signal: Empirical · Consensus signal: Empirical

Teacher disagreement score0.760

Threshold uncertainty score0.998

Codex and Gemma teacher scores by category

Category	Codex	Gemma
Metaresearch	0.016	0.016
Meta-epidemiology (narrow)	0.012	0.023
Meta-epidemiology (broad)	0.005	0.023
Bibliometrics	0.007	0.015
Science and technology studies	0.018	0.019
Scholarly communication	0.016	0.016
Open science	0.024	0.023
Research integrity	0.022	0.021
Insufficient payload (model declined to judge)	0.428	0.017

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 head0.019

GPT teacher head0.288

Teacher spread0.268 · how far apart the two teachers sit on this one work

Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; both teacher heads agree on what is shown here.

Meta-epidemiology (narrow)Science and technology studies Scholarly communication Open science Research integrity Insufficient payload (model declined to judge)

Study designBench or experimental

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".

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Citations1

Published2025

Admission routes1

Has abstractyes

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