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Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mi>π</mml:mi><mml:mi>l</mml:mi><mml:mi>ν</mml:mi></mml:math>Branching Fraction and Determination of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">|</mml:mo><mml:msub><mml:mi>V</mml:mi><mml:mrow><mml:mi>u</mml:mi><mml:mi>b</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">|</mml:mo></mml:math>with Tagged<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>Mesons
B. Aubert, R. Barate, M. Bóna, D. Boutigny, F. Couderc, Y. Karyotakis, J. P. Lees, V. Poireau, V. Tisserand, A. Zghiche, E. Graugés, A. Palano, J C Chen, N. D. Qi, G. Rong, P Wang, Y. S. Zhu, G. Eigen, I. Ofte, B. Stugu, G. S. Abrams, M. Battaglia, D. N. Brown, J. Button‐Shafer, R. N. Cahn, E. Charles, M. S. Gill, Y. Groysman, R. G. Jacobsen, J. Kadyk, L. T. Kerth, Yu. G. Kolomensky, G. Kukartsev, G. Lynch, L. M. Mir, T. Orimoto, M. Pripstein, N. A. Roe, M. T. Ronan, W.A. Wenzel, P. del Amo Sanchez, M. Barrett, K. E. Ford, T. J. Harrison, A. John Hart, C. M. Hawkes, S. E. Morgan, A. T. Watson, T. Held, H. Koch, B. Lewandowski, M. Pelizaeus, Κ. Peters, T. Vazquez Schroeder, M. Steinke, J. Boyd, J. P. Burke, W. N. Cottingham, D. Walker, T. Çuhadar-Dönszelmann, B. G. Fulsom, C. Hearty, N. S. Knecht, T. S. Mattison, J. A. McKenna, A. Khan, P. Kyberd, M. Saleem, D. J. Sherwood, L. Teodorescu, V. E. Blinov, A. D. Bukin, В. П. Дружинин, V. B. Golubev, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, K. Yu. Todyshev, D. S. Best, M. Bondioli, M. Bruinsma, M. Chao, S. Curry, I. Eschrich, D. Kirkby, A. J. Lankford, P. Lund, M. Mandelkern, R. K. Mommsen, W. Roethel, D. P. Stoker, S. Abachi, C. Buchanan, S. D. Foulkes, J. W. Gary, O. R. Long, B. C. Shen, K. Wang, L. Zhang, H. K. Hadavand, E. J. Hill, H. P. Paar, S. Rahatlou, V. Sharma, J. Berryhill, C. Campagnari, A. Cunha, B. Dahmes, T. M. Hong, D. Kovalskyi, J. D. Richman, T. W. Beck, A. M. Eisner, C. J. Flacco, C.A. Heusch, J. Kroseberg, W. S. Lockman, G. Nesom, T. Schalk, B. A. Schumm, A. Seiden, P. Spradlin, D. C. Williams, M. G. Wilson, J. Albert, E. Chen, A. Dvoretskii, F. Fang, D. G. Hitlin, I. Narsky, T. Piatenko, F. C. Porter, A. Rýd, A. Samuel, G. Mancinelli, B. T. Meadows, K. Mishra, M. D. Sokoloff, F. Blanc, P. C. Bloom, S. Chen, W. T. Ford, J. F. Hirschauer, A. Kreisel, M. Nagel, U. Nauenberg, A. Olivas, W. O. Ruddick, J. G. Smith, K. A. Ulmer, S. R. Wagner, J. Zhang, A. Chen, E. A. Eckhart, A. Soffer, W. H. Toki, R. J. Wilson, Q. Zeng, D. D. Altenburg, E. Feltresi, H. Jasper, A. Petzold, B. Spaan, T. Brandt, V. Klose, H. M. Lacker, W. F. Mader, R. Nogowski, J. Schubert, K. R. Schubert, R. Schwierz, J. E. Sundermann, A. Volk, D. Bernard, G. R. Bonneaud, P. Grenier, E. Latour, Ch. Thiebaux, M. Verderi, P. J. Clark, W. Gradl, S. Playfer, A. I. Robertson, Y. Xie, M. Andreotti, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Luppi, M. Negrini, A. Petrella, L. Piemontese, E. Prencipe, F. Anulli, R. Baldini-Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, S. Pacetti, P. Patteri, I. M. Peruzzi, M. Piccolo, M. Rama, A. Zallo, A. Buzzo, R. Capra, R. Contri, M. Lo Vetere, M. Macrı́, M. R. Monge, S. Passaggio, C. Patrignani, E. Robutti, A. Santroni, S. Tosi, G. Brandenburg, K. S. Chaisanguanthum, M. Morii, R. S. Dubitzky, J. Marks, S. Schenk, U. Uwer, D. J. Bard, W. Bhimji, D. A. Bowerman, P. D. Dauncey, U. Egede, R. L. Flack, J. Nash, M. B. Nikolich, J. G. Panduro Vazquez, P. K. Behera, X. Chai, M. Charles, U. Mallik, N. T. Meyer, V. Ziegler, J. Cochran, H. B. Crawley, L. Y. Dong, V. Eyges, W. T. Meyer, S. Prell, E. I. Rosenberg, A. E. Rubin, A. V. Gritsan, A. G. Denig, M. Fritsch, G. Schott, N. Arnaud, M. Davier, G. Grosdidier, A. Höcker, F. Le Diberder, V. Lepeltier, A. M. Lutz, S. Pruvot, S. Rodier, P. Roudeau, M. H. Schune, A. Stocchi, W. F. Wang, G. Wormser, C. H. Cheng, D. J. Lange, D. M. Wright, C. A. Chavez, I. J. Forster, J. R. Fry, E. Gabathuler, R. Gamet, K. A. George, D. Hutchcroft, D. J. Payne, K. C. Schofield, C. Touramanis, A. J. Bevan, F. Di Lodovico, W. Menges, R. Sacco, G. Cowan, H. U. Flaecher, D. A. Hopkins, P. S. Jackson, T. R. McMahon, S. Ricciardi, F. Salvatore, A. C. Wren, D. N. Brown, C. L. Davis, J. Allison, N. Barlow, R. J. Barlow, Y. M. Chia, C. L. Edgar, G. Lafferty, M. T. Naisbit, J.C. Williams, J. I. Yi, C. Chen, W D Hulsbergen, A. Jawahery, C. K. Lae, D. A. Roberts, G. Simi, G. Blaylock, C. Dallapiccola, S. S. Hertzbach, X Li, T. B. Moore, S. Saremi, H. Staengle, R. Cowan, G. Sciolla, S. J. Sekula, M. Spitznagel, F. Taylor, R. K. Yamamoto, Hyun Chan Kim, S. E. Mclachlin, Piyush M. Patel, S. H. Robertson, A. Lazzaro, V. Lombardo, F Palombo, J. M. Bauer, L. Cremaldi, V. Eschenburg, R. Godang, R. Kroeger, D. A. Sanders, D. Summers, H. W. Zhao, S. Brunet, D. Côté, M. Simard, P. Taras, F. B. Viaud, H. Nicholson, N. Cavallo, G. De Nardo, F. Fabozzi, C. Gatto, L. Lista, D. Monorchio, P. Paolucci, D. Piccolo, C. Sciacca, M. Baak, G. Raven, H. L. Snoek, C. P. Jessop, J. M. LoSecco, T. Allmendinger, G. Benelli, K. K. Gan, K. Honscheid, D. Hufnagel, P. Jackson, H. Kagan, Robert E. Kass, A. M. Rahimi, R. Ter-Antonyan, Q. K. Wong, N. L. Blount, J. Brau, R. Frey, O. Igonkina, M. Lu, R. Rahmat, N. B. Sinev, D. Strom, J. Strube, E. Torrence, A. Gaz, Martino Margoni, M. Morandin, A. Pompili, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, C. Voci, M. Benayoun, J. Chauveau, H. Briand, P. David, L. Del Buono, Ch de la Vaissière, O. Hamon, B. L. Hartfiel, M. John, Ph. Leruste, J. Malclès, J. Ocariz, L. Roos, G. Thérin, L. Gladney, J. Panetta, M. Biasini, R. Covarelli, C. Angelini, G. Batignani, S. Bettarini, F. Bucci, G. Calderini, M. Carpinelli, R. Cenci, F. Forti, M. A. Giorgi, A. Lusiani, G. Marchiori, M. Mazur, M. Morganti, N. Néri, E. Paoloni, G. Rizzo, J. Walsh, M. Haire, D. Judd, D E Wagoner, J. Biesiada, N. Danielson, P. Elmer, Y. P. Lau, Chia‐Hui Lu, J. Olsen, A. J. S. Smith, A. V. Telnov, F. Bellini, G. Cavoto, A. D’Orazio, D. Del Re, E. Di Marco, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. A. Mazzoni, S. Morganti, G. Piredda, F. Polci, F. Safai Tehrani, C. Voena, M. Ebert, H. Schröder, R. Waldi, T. Adye, N. De Groot, B. Franek, E. O. Olaiya, F. F. Wilson, R. Aleksan, S. Emery, A. Gaidot, S. F. Ganzhur, G. Hamel de Monchenault, W. Kozanecki, M. Legendre, G. Vasseur, Ch. Yèche, M. Zito, X R Chen, H. Liu, W. Park, M. V. Purohit, M. T. Allen, D. Aston, R. Bartoldus, P. Bechtle, N. Berger, R. Claus, J. P. Coleman, M. R. Convery, M. Cristinziani, J. Dingfelder, J. Dorfan, G. P. Dubois-Felsmann, D. Dujmić, W. Dunwoodie, R. C. Field, T. Glanzman, S. J. Gowdy, M. T. Graham, V. Halyo, C. Hast, T. Hryn’ova, W. R. Innes, M. Kelsey, P. Kim, D. W. G. S. Leith, S. Li, S. Luitz, V. Lüth, H. L. Lynch, D. B. MacFarlane, H. Marsiske, R. Messner, D. R. Müller, C. P. O’Grady, V. E. Ozcan, A. Perazzo, M. Perl, T. Pulliam, B. N. Ratcliff, A. Roodman, A. A. Salnikov, R. H. Schindler, J. Schwiening, A. Snyder, J. Stelzer, D. Su, M. Sullivan, K Suzuki, S. K. Swain, J. M. Thompson, J. Va’vra, M. Weaver, A. J. Weinstein, W. J. Wisniewski, M. Wittgen, D. H. Wright, A. K. Yarritu, K. Yi, C. C. Young, P. R. Burchat, A. J. Edwards, S. Majewski, B. A. Petersen, C. Roat, L. Wilden, S. Ahmed, M. S. Alam, R. Bula, J. Ernst, V. Jain, B. Pan, M. A. Saeed, F. Wappler, S B Zain, W. Bugg, M Krishnamurthy, S. M. Spanier, R. Eckmann, J. L. Ritchie, A. Satpathy, C J Schilling, R. F. Schwitters, J. M. Izen, X. C. Lou, S Ye, F. Bianchi, F. Gallo, D. Gamba, M. Bomben, L. Bosisio, C. Cartaro, F. Cossutti, G. Della Ricca, S. Dittongo, L. Lanceri, L. Vitale, V. Azzolini, F. Martínez-Vidal, Sw. Banerjee, B. Bhuyan, C. M. Brown, D. Fortin, K. Hamano, R. Kowalewski, I. M. Nugent, J. M. Roney, R. Sobie, J. J. Back, P. F. Harrison, T. Latham, G. B. Mohanty, M. Pappagallo, H. R. Band, X. Chen, B. Cheng, S. Dasu, M. Datta, K. T. Flood, J. J. Hollar, P. E. Kutter, B. Mellado, A. Mihályi, Y. Pan, M. Pierini, R. Prepost, S. L. Wu, Z. Yu, H. Neal
Bibliographic record
VenuePhysical Review Letters · 2006
Typearticle
Languagelv
FieldPhysics and Astronomy
TopicParticle physics theoretical and experimental studies
Canadian institutionsUniversity of VictoriaUniversité de MontréalMcGill UniversityUniversity of British Columbia
FundersSLAC National Accelerator LaboratoryInstitut National de Physique Nucléaire et de Physique des ParticulesU.S. Department of EnergyEuropean CommissionInstitute of High Energy PhysicsCentre National de la Recherche ScientifiqueBundesministerium für Bildung und ForschungScience and Technology Facilities CouncilNatural Sciences and Engineering Research Council of CanadaAlfred P. Sloan FoundationDeutsche ForschungsgemeinschaftMinisterio de Economía y CompetitividadNational Science Foundation
KeywordsPhysicsParticle physicsHadronMesonQuantum chromodynamicsBranching fractionIsospinB mesonSemileptonic decayAlgorithmNuclear physicsLeptonMathematics
Abstract
We report a measurement of the $B\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\ell}\ensuremath{\nu}$ branching fraction based on $211\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data collected with the BABAR detector. We use samples of ${B}^{0}$ and ${B}^{+}$ mesons tagged by a second $B$ meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\ell}}^{+}\ensuremath{\nu})=(1.33\ifmmode\pm\else\textpm\fi{}{0.17}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}{0.11}_{\mathrm{syst}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$. We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{ub}|$ by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find $|{V}_{ub}|=(4.5\ifmmode\pm\else\textpm\fi{}{0.5}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}{0.3}_{\mathrm{syst}}{\genfrac{}{}{0}{}{+0.7}{\ensuremath{-}0.5}}_{\mathrm{FF}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$, where the last error is due to the normalization of the form factor.
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: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.043
Threshold uncertainty score0.144
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.043 | 0.023 |
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 head0.016
GPT teacher head0.248
Teacher spread0.232 · 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 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".
Quick stats
Citations38
Published2006
Admission routes2
Has abstractyes