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Experimental Discrimination between Charge<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi>e</mml:mi><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:math>Top Quark and Charge<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>4</mml:mn><mml:mi>e</mml:mi><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:math>Exotic Quark Production Scenarios
V. M. Abazov, B. Abbott, M. Abolins, B. S. Acharya, M. Adams, T. Adams, M. Agelou, S. H. Ahn, M. Ahsan, G. D. Alexeev, G. Alkhazov, G. Alverson, G. A. Alves, M. Anastasoaie, T. Andeen, S. Anderson, B. Andrieu, M. S. Anzelc, Y. Arnoud, M. Arov, A. Askew, B. Åsman, A. C. S. Assis Jesus, O. Atramentov, C. Autermann, C. Ávila, C. Ay, F. Badaud, A. Baden, L. Bagby, B. Baldin, D. V. Bandurin, P. Banerjee, S. Banerjee, E. Barberis, P. Bargassa, P. Baringer, C. Barnes, J. Barreto, J. F. Bartlett, U. Bassler, D. Bauer, A. Bean, M. Begalli, M. Begel, C. Bélanger-Champagne, L. Bellantoni, A. Bellavance, J. F. Benitez, S. B. Beri, G. Bernardi, R. Bernhard, L. Berntzon, I. A. Bertram, M. Besançon, R. Beuselinck, V. A. Bezzubov, P. C. Bhat, V. Bhatnagar, M. Binder, C. Biscarat, K. M. Black, I. Blackler, G. Blazey, F. Blekman, S. Blessing, D. Blöch, K. Bloom, U. Blumenschein, A. Boehnlein, O. E. Vickey Boeriu, T. A. Bolton, G. Borissov, K. Bos, T. Bose, A. Brandt, R. Brock, G. Brooijmans, A. Bross, D. Brown, N. J. Buchanan, D. Buchholz, M. Buehler, V. Buescher, S. Burdin, S. Bürke, T. H. Burnett, K. Satô, C. P. Buszello, J. M. Butler, P. Calfayan, S. Calvet, J. Cammin, S. Caron, W. Carvalho, N. M. Cason, H. Castilla-Valdez, D. Chakraborty, K. M. Chan, A. Chandra, F. Charles, E. Cheu, F. Chevallier, D. K. Cho, S. Choi, B. C. Choudhary, L. Christofek, D. R. Claes, B. Clément, C. Clément, Y. Coadou, M. Cooke, W. E. Cooper, D. Coppage, M. Corcoran, M.-C. Cousinou, B. Cox, S. Crépé-Renaudin, D. Cutts, M. Ćwiok, H. da Motta, Ashok Das, Mrinal Kumar Das, Brian Davies, G. Davies, G. A. Davis, K. De, S. J. de Jong, E. De La Cruz–Burelo, C. De Oliveira Martins, J. Degenhardt, F. Déliot, M. Demarteau, R. Demina, P. Demine, D. Denisov, S. P. Denisov, S. Desai, H. T. Diehl, M. Diesburg, Mark Doidge, A. Dominguez, H. Dong, L. Dudko, L. Duflot, S. R. Dugad, D. Duggan, A. Duperrin, J. Dyer, A. Dyshkant, M. Eads, D. Edmunds, T. Edwards, J. Ellison, J. Elmsheuser, V. D. Elvira, S. C. Eno, P. Ermolov, H. Evans, A. Evdokimov, V. N. Evdokimov, S. N. Fatakia, L. Feligioni, A. V. Ferapontov, T. Ferbel, F. Fiedler, F. Filthaut, W. C. Fisher, H. E. Fisk, I. Fleck, M. Ford, M. Fortner, H. Fox, S. Fu, S. Fuess, T. Gadfort, Cristina Galea, E. Gallas, E. Galyaev, C. Garcı́a, A. Garcia-Bellido, J. Gardner, V. Gavrilov, A. Gay, P. Gay, D. Gelé, R. Gelhaus, C. E. Gerber, Y. Gershtein, D. T. Gil, G. Ginther, N. Gollub, B. Gómez, A. G. Goussiou, P. D. Grannis, H. Greenlee, Z. D. Greenwood, E. M. Gregores, G. Grenier, Ph. Gris, J.-F. Grivaz, S. Grünendahl, M. Grünewald, F. Guo, J. Guo, G. Gutiérrez, P. Gutierrez, A. Haas, N. J. Hadley, P. Haefner, S. Hagopian, J. Haley, I. Hall, R. E. Hall, L. Han, K. Hanagaki, K. Harder, A. Harel, R. D. Harrington, J. M. Hauptman, R. Hauser, J. Hays, T. Hebbeker, D. Hedin, J. G. Hegeman, J. M. Heinmiller, A. P. Heinson, U. Heintz, C. Hensel, K. Herner, G. Hesketh, M. D. Hildreth, R. Hirosky, J. D. Hobbs, B. Hoeneisen, H. Hoeth, M. Hohlfeld, S. J. Hong, R. Hooper, P. Houben, Y. Hu, Z. Hubáček, V. Hynek, I. Iashvili, R. Illingworth, A. S. Ito, S. Jabeen, M. Jaffré, Sa. Jain, K. Jakobs, C. Jarvis, A. Jenkins, R. Jesik, K. A. Johns, C. A. Johnson, M. Johnson, A. Jonckheere, P. Jonsson, D. Käfer, S. Kahn, E. Kajfasz, A. Kalinin, J. M. Kalk, J. R. Kalk, S. Kappler, D. Karmanov, J. Kasper, P. A. Kasper, I. Katsanos, D. Kau, R. Kaur, R. Kehoe, S. Kermiche, N. Khalatyan, A. Khanov, A. Kharchilava, Y. M. Kharzheev, D. Khatidze, H. Kim, T. J. Kim, M. H. Kirby, B. Klima, J. M. Kohli, J.‐P. Konrath, M. Kopál, V. M. Korablev, J. Kotcher, B. Kothari, A. Koubarovsky, A. V. Kozelov, J. Kozminski, D. Krop, A. Kryemadhi, T. Kühl, Arun Kumar, S. Kunori, A. Kupčo, T. Kurča, J. Kvita, S. Lammers, G. Landsberg, J. Lazo-Flores, A-C Le Bihan, P. Lebrun, W. M. Lee, A. Leflat, F. Lehner, V. Lesne, J. Levêque, P. Lewis, J. Li, Q. Li, J. G. R. Lima, D. Lincoln, J. Linnemann, V. V. Lipaev, R. Lipton, Z. Liu, L. Lobo, A. Lobodenko, M. Lokajı́ček, A. Lounis, Peter Love, H. J. Lubatti, M. Lynker, A. L. Lyon, A. K. A. Maciel, R. J. Madaras, P. Mättig, C. Magass, A. Magerkurth, A.-M. Magnan, N. Makovec, P. Mal, H. B. Malbouisson, S. Malik, V. L. Malyshev, H. S. Mao, Y. Maravin, M. Martens, R. McCarthy, D. Meder, A. Melnitchouk, Andre David Tinoco Mendes, L. Mendoza, M. Merkin, K. W. Merritt, A. Meyer, J. Meyer, M. Michaut, H. Miettinen, T. Millet, J. Mitrevski, J. Molina, N. K. Mondal, J. Monk, R. W. Moore, T. Moulik, G. S. Muanza, M. Mulders, M. Mulhearn, L. Mundim, Y. D. Mutaf, M. Naimuddin, M. Narain, N. A. Naumann, H. A. Neal, J. P. Negret, P. Neustroev, C. Noeding, A. Nomerotski, S. F. Novaes, T. Nunnemann, V. O’Dell, D. C. O’Neil, G. Obrant, V. Oguri, N. Oliveira, N. Oshima, R. Otec, G. J. Otero y Garzón, M. Owen, P. Padley, N. Parashar, S.-J. Park, Sung Keun Park, J. A. Parsons, R. Partridge, N. Parua, A. Patwa, G. Pawloski, P. M. Perea, E. Perez, Κ. Peters, P. Pétroff, M. Petteni, R. Piegaia, J. Piper, M.-A. Pleier, P. L. M. Podesta-Lerma, V. M. Podstavkov, Y. Pogorelov, M. E. Pol, A. Pompoš, B. G. Pope, А. В. Попов, C. T. Potter, W. L. Prado Da Silva, H. Prosper, S. Protopopescu, J. Qian, A. Quadt, B. Quinn, M. S. Rangel, K. J. Rani, K. Ranjan, P. N. Ratoff, P. Renkel, S. Reucroft, M. Rijssenbeek, I. Ripp-Baudot, F. Rizatdinova, S. Robinson, R. F. Rodrigues, C. Royon, P. Rubinov, R. Ruchti, V. I. Ruď, G. Sajot, A. Sánchez-Hernández, M. P. Sanders, A. Santoro, G. Savage, L. Sawyer, T. Scanlon, D. Schaile, R. D. Schamberger, Y. Scheglov, H. Schellman, P. Schieferdecker, C. Schmitt, C. Schwanenberger, R. Schwienhorst, J. Sekaric, S. Sengupta, H. Severini, E. Shabalina, M. Shamim, V. Shary, A. A. Shchukin, W. D. Shephard, R. K. Shivpuri, D. Shpakov, V. Siccardi, R. A. Sidwell, V. Šimák, V. Sirotenko, P. Skubic, P. Slattery, R. P. Smith, G. R. Snow, J. Snow, S. Söldner‐Rembold, X. Song, L. Sonnenschein, A. Sopczak, M. Sosebee, K. Soustružnı́k, M. Souza, B. Spurlock, J. Stark, J. Steele, V. Stolin, A. Stone, D. A. Stoyanova, J. Strandberg, S. Strandberg, M. A. Strang, M. Strauss, R. Ströhmer, D. Strom, M. Strovink, L. Stutte, S. Sumowidagdo, A. Sznajder, M. Talby, P. Tamburello, W. Taylor, P. Telford, J. Temple, B. Tiller, M. Titov, V. V. Tokmenin, M. Tomoto, T. Toole, I. Torchiani, S. Towers, T. Trefzger, S. Trincaz-Duvoid, D. Tsybychev, B. Tuchming, C. Tully, A. S. Turcot, P. M. Tuts, R. Unalan, S. Uvarov, S. Uzunyan, B. Vachon, P. J. van den Berg, R. Van Kooten, W. M. van Leeuwen, N. Varelas, E. W. Varnes, A. Vartapetian, I. A. Vasilyev, M. Vaupel, P. Verdier, L. S. Vertogradov, M. Verzocchi, F. Villeneuve-Seguier, P. Vint, J.-R. Vlimant, E. von Toerne, M. Voutilainen, M. Vreeswijk, H. D. Wahl, L. Wang, M. Wang, J. Warchol, G. Watts, M. Wayne, M. Weber, H. Weerts, N. Wermes, M. Wetstein, A. White, D. Wicke, G. Wilson, S. J. Wimpenny, M. Wobisch, J. Womersley, D. Wood, T. R. Wyatt, Y. Xie, N. Xuan, S. Yacoob, R. Yamada, M. Yan, T. Yasuda, Y. A. Yatsunenko, K. Yip, H. D. Yoo, S. W. Youn, Yu Chen, J. Yu, A. Yurkewicz, A. Zatserklyaniy, C. Zeitnitz, D. F. Zhang, T. Zhao, B. Zhou, J. Zhu, M. Zieliński, D. Ziemińska, A. Ziemiński, V. Zutshi, E. G. Zverev
Bibliographic record
VenuePhysical Review Letters · 2007
Typearticle
Languagelv
FieldPhysics and Astronomy
TopicParticle physics theoretical and experimental studies
Canadian institutionsnot available
FundersInstitut National de Physique Nucléaire et de Physique des ParticulesScience and Technology Facilities CouncilConsejo Nacional de Investigaciones Científicas y TécnicasNatural Sciences and Engineering Research Council of CanadaFundação para o Desenvolvimento da UNESPCentre National de la Recherche ScientifiqueU.S. Department of EnergyVetenskapsrådetConselho Nacional de Desenvolvimento Científico e TecnológicoBundesministerium für Bildung und ForschungFundação de Amparo à Pesquisa do Estado de São PauloCoordenação de Aperfeiçoamento de Pessoal de Nível SuperiorRussian Foundation for Basic ResearchDepartamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)Federal Agency for Science and InnovationDeutsche ForschungsgemeinschaftKorea Science and Engineering FoundationWestern Canada Research GridAlexander von Humboldt-StiftungFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de JaneiroDepartment of Science and Technology, Ministry of Science and Technology, IndiaFermilabNational Science FoundationScience Foundation IrelandSecretaría de Ciencia y Técnica, Universidad de Buenos Aires
KeywordsPhysicsMuonQuarkCharge (physics)TevatronParticle physicsNuclear physics
Abstract
We present the first experimental discrimination between the 2e/3 and 4e/3 top quark electric charge scenarios, using top quark pairs (tt) produced in pp collisions at (square root) s = 1.96 TeV by the Fermilab Tevatron Collider. We use 370 pb;{-1} of data collected by the D0 experiment and select events with at least one high transverse momentum electron or muon, high transverse energy imbalance, and four or more jets. We discriminate between b- and b-quark jets by using the charge and momenta of tracks within the jet cones. The data are consistent with the expected electric charge, |q|=2e/3. We exclude, at the 92% C.L., that the sample is solely due to the production of exotic quark pairs QQ with |q|=4e/3. We place an upper limit on the fraction of QQ pairs rho<0.80 at the 90% C.L.
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)0.001
metaresearch head score (Gemma)0.002
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.004
Threshold uncertainty score0.014
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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 head0.021
GPT teacher head0.266
Teacher spread0.245 · 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 designSimulation or modeling
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
Citations63
Published2007
Admission routes1
Has abstractyes