Test of lepton flavor universality by the measurement of the B0→D*−τ+ντ branching fraction using three-prong τ decays

Aaij, R. et al. (2018) Test of lepton flavor universality by the measurement of the B0→D*−τ+ντ branching fraction using three-prong τ decays. Physical Review D, 97(7), 072013. (doi: 10.1103/PhysRevD.97.072013)

[img]
Preview
Text
189402.pdf - Published Version
Available under License Creative Commons Attribution.

1MB

Abstract

The ratio of branching fractions R ( D * − ) ≡ B ( B 0 → D * − τ + ν τ ) / B ( B 0 → D * − μ + ν μ ) is measured using a data sample of proton-proton collisions collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3     fb − 1 . The τ lepton is reconstructed with three charged pions in the final state. A novel method is used that exploits the different vertex topologies of signal and backgrounds to isolate samples of semitauonic decays of b hadrons with high purity. Using the B 0 → D * − π + π − π + decay as the normalization channel, the ratio B ( B 0 → D * − τ + ν τ ) / B ( B 0 → D * − π + π − π + ) is measured to be 1.97 ± 0.13 ± 0.18 , where the first uncertainty is statistical and the second systematic. An average of branching fraction measurements for the normalization channel is used to derive B ( B 0 → D * − τ + ν τ ) = ( 1.42 ± 0.094 ± 0.129 ± 0.054 ) % , where the third uncertainty is due to the limited knowledge of B ( B 0 → D * − π + π − π + ) . A test of lepton flavor universality is performed using the well-measured branching fraction B ( B 0 → D * − μ + ν μ ) to compute R ( D * − ) = 0.291 ± 0.019 ± 0.026 ± 0.013 , where the third uncertainty originates from the uncertainties on B ( B 0 → D * − π + π − π + ) and B ( B 0 → D * − μ + ν μ ) . This measurement is in agreement with the Standard Model prediction and with previous measurements.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Dean, Cameron and Ogilvy, Mr Stephen and Wraight, Dr Kenneth and Alexander, Dr Michael and Soler, Professor Paul and Schiller, Dr Manuel and Douglas, Lauren and Beddow, John and Traill, Mr Murdo and Spradlin, Dr Patrick and Karodia, Sarah and Eklund, Professor Lars and Longstaff, Iain Richard
Authors: Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J. E., Appleby, R. B., Archilli, F., d’Argent, P., Arnau Romeu, J., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Babuschkin, I., Bachmann, S., Back, J. J., Badalov, A., Baesso, C., Baker, S., Balagura, V., Baldini, W., Baranov, A., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Baryshnikov, F., Batozskaya, V., Battista, V., Bay, A., Beaucourt, L., Beddow, J., Bedeschi, F., Bediaga, I., Beiter, A., Bel, L. J., Beliy, N., Bellee, V., Belloli, N., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Beranek, S., Berezhnoy, A., Bernet, R., Berninghoff, D., Bertholet, E., Bertolin, A., Betancourt, C., Betti, F., Bettler, M.-O., van Beuzekom, M., Bezshyiko, I., Bifani, S., Billoir, P., Birnkraut, A., Bitadze, A., Bizzeti, A., Bjørn, M., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Boettcher, T., Bondar, A., Bondar, N., Bonivento, W., Bordyuzhin, I., Borgheresi, A., Borghi, S., Borisyak, M., Borsato, M., Bossu, F., Boubdir, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Braun, S., Britton, T., Brodzicka, J., Brundu, D., Buchanan, E., Burr, C., Bursche, A., Buytaert, J., Byczynski, W., Cadeddu, S., Cai, H., Calabrese, R., Calladine, R., Calvi, M., Calvo Gomez, M., Camboni, A., Campana, P., Campora Perez, D. H., Capriotti, L., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carniti, P., Carson, L., Carvalho Akiba, K., Casse, G., Cassina, L., Castillo Garcia, L., Cattaneo, M., Cavallero, G., Cenci, R., Chamont, D., Chapman, M. G., Charles, M., Charpentier, P., Chatzikonstantinidis, G., Chefdeville, M., Chen, S., Cheung, S. F., Chitic, S.-G., Chobanova, V., Chrzaszcz, M., Chubykin, A., Ciambrone, P., Cid Vidal, X., Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coco, V., Cogan, J., Cogneras, E., Cogoni, V., Cojocariu, L., Collins, P., Colombo, T., Comerma-Montells, A., Contu, A., Cook, A., Coombs, G., Coquereau, S., Corti, G., Corvo, M., Costa Sobral, C. M., Couturier, B., Cowan, G. A., Craik, D. C., Crocombe, A., Cruz Torres, M., Currie, R., D’Ambrosio, C., Da Cunha Marinho, F., Dall’Occo, E., Dalseno, J., Davis, A., De Aguiar Francisco, O., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Serio, M., De Simone, P., Dean, C. T., Decamp, D., Del Buono, L., Dembinski, H.-P., Demmer, M., Dendek, A., Derkach, D., Deschamps, O., Dettori, F., Dey, B., Di Canto, A., Di Nezza, P., Dijkstra, H., Dordei, F., Dorigo, M., Dosil Suárez, A., Douglas, L., Dovbnya, A., Dreimanis, K., Dufour, L., Dujany, G., Dungs, K., Durante, P., Dzhelyadin, R., Dziewiecki, M., Dziurda, A., Dzyuba, A., Déléage, N., Easo, S., Ebert, M., Egede, U., Egorychev, V., Eidelman, S., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Ely, S., Esen, S., Evans, H. M., Evans, T., Falabella, A., Farley, N., Farry, S., Fay, R., Fazzini, D., Federici, L., Ferguson, D., Fernandez, G., Fernandez Declara, P., Fernandez Prieto, A., Ferrari, F., Ferreira Rodrigues, F., Ferro-Luzzi, M., Filippov, S., Fini, R. A., Fiore, M., Fiorini, M., Firlej, M., Fitzpatrick, C., Fiutowski, T., Fleuret, F., Fohl, K., Fontana, M., Fontanelli, F., Forshaw, D. C., Forty, R., Franco Lima, V., Frank, M., Frei, C., Fu, J., Funk, W., Furfaro, E., Färber, C., Gabriel, E., Gallas Torreira, A., Galli, D., Gallorini, S., Gambetta, S., Gandelman, M., Gandini, P., Gao, Y., Garcia Martin, L. M., García Pardiñas, J., Garra Tico, J., Garrido, L., Garsed, P. J., Gascon, D., Gaspar, C., Gavardi, L., Gazzoni, G., Gerick, D., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, P., Gianì, S., Gibson, V., Girard, O. G., Giubega, L., Gizdov, K., Gligorov, V. V., Golubkov, D., Golutvin, A., Gomes, A., Gorelov, I. V., Gotti, C., Govorkova, E., Grabowski, J. P., Graciani Diaz, R., Granado Cardoso, L. A., Graugés, E., Graverini, E., Graziani, G., Grecu, A., Greim, R., Griffith, P., Grillo, L., Gruber, L., Gruberg Cazon, B. R., Grünberg, O., Gushchin, E., Guz, Y., Gys, T., Göbel, C., Hadavizadeh, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Haines, S. C., Hamilton, B., Han, X., Hancock, T. H., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., Hasse, C., Hatch, M., He, J., Hecker, M., Heinicke, K., Heister, A., Hennessy, K., Henrard, P., Henry, L., van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hombach, C., Hopchev, P. H., Huard, Z. C., Hulsbergen, W., Humair, T., Hushchyn, M., Hutchcroft, D., Ibis, P., Idzik, M., Ilten, P., Jacobsson, R., Jalocha, J., Jans, E., Jawahery, A., Jiang, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kandybei, S., Karacson, M., Kariuki, J. M., Karodia, S., Kazeev, N., Kecke, M., Kelsey, M., Kenzie, M., Ketel, T., Khairullin, E., Khanji, B., Khurewathanakul, C., Kirn, T., Klaver, S., Klimaszewski, K., Klimkovich, T., Koliiev, S., Kolpin, M., Komarov, I., Kopecna, R., Koppenburg, P., Kosmyntseva, A., Kotriakhova, S., Kozeiha, M., Kravchuk, L., Kreps, M., Krokovny, P., Kruse, F., Krzemien, W., Kucewicz, W., Kucharczyk, M., Kudryavtsev, V., Kuonen, A. K., Kurek, K., Kvaratskheliya, T., Lacarrere, D., Lafferty, G., Lai, A., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Le Gac, R., van Leerdam, J., Leflat, A., Lefrançois, J., Lefèvre, R., Lemaitre, F., Lemos Cid, E., Leroy, O., Lesiak, T., Leverington, B., Li, P.-R., Li, T., Li, Y., Li, Z., Likhomanenko, T., Lindner, R., Lionetto, F., Liu, X., Loh, D., Loi, A., Longstaff, I., Lopes, J. H., Lucchesi, D., Lucio Martinez, M., Luo, H., Lupato, A., Luppi, E., Lupton, O., Lusiani, A., Lyu, X., Machefert, F., Maciuc, F., Macko, V., Mackowiak, P., Maddrell-Mander, S., Maev, O., Maguire, K., Maisuzenko, D., Majewski, M. W., Malde, S., Malinin, A., Maltsev, T., Manca, G., Mancinelli, G., Manning, P., Marangotto, D., Maratas, J., Marchand, J. F., Marconi, U., Marin Benito, C., Marinangeli, M., Marino, P., Marks, J., Martellotti, G., Martin, M., Martinelli, M., Martinez Santos, D., Martinez Vidal, F., Martins Tostes, D., Massacrier, L. M., Massafferri, A., Matev, R., Mathad, A., Mathe, Z., Matteuzzi, C., Mauri, A., Maurice, E., Maurin, B., Mazurov, A., McCann, M., McNab, A., McNulty, R., Mead, J. V., Meadows, B., Meaux, C., Meier, F., Meinert, N., Melnychuk, D., Merk, M., Merli, A., Michielin, E., Milanes, D. A., Millard, E., Minard, M.-N., Minzoni, L., Mitzel, D. S., Mogini, A., Molina Rodriguez, J., Mombächer, T., Monroy, I. A., Monteil, S., Morandin, M., Morello, M. J., Morgunova, O., Moron, J., Morris, A. B., Mountain, R., Muheim, F., Mulder, M., Mussini, M., Müller, D., Müller, J., Müller, K., Müller, V., Naik, P., Nakada, T., Nandakumar, R., Nandi, A., Nasteva, I., Needham, M., Neri, N., Neubert, S., Neufeld, N., Neuner, M., Nguyen, T. D., Nguyen-Mau, C., Nieswand, S., Niet, R., Nikitin, N., Nikodem, T., Nogay, A., O’Hanlon, D. P., Oblakowska-Mucha, A., Obraztsov, V., Ogilvy, S., Oldeman, R., Onderwater, C. J. G., Ossowska, A., Otalora Goicochea, J. M., Owen, P., Oyanguren, A., Pais, P. R., Palano, A., Palutan, M., Papanestis, A., Pappagallo, M., Pappalardo, L. L., Parker, W., Parkes, C., Passaleva, G., Pastore, A., Patel, M., Patrignani, C., Pearce, A., Pellegrino, A., Penso, G., Pepe Altarelli, M., Perazzini, S., Perret, P., Pescatore, L., Petridis, K., Petrolini, A., Petrov, A., Petruzzo, M., Picatoste Olloqui, E., Pietrzyk, B., Pikies, M., Pinci, D., Pisani, F., Pistone, A., Piucci, A., Placinta, V., Playfer, S., Plo Casasus, M., Polci, F., Poli Lener, M., Poluektov, A., Polyakov, I., Polycarpo, E., Pomery, G. J., Ponce, S., Popov, A., Popov, D., Poslavskii, S., Potterat, C., Price, E., Prisciandaro, J., Prouve, C., Pugatch, V., Puig Navarro, A., Pullen, H., Punzi, G., Qian, W., Quagliani, R., Quintana, B., Rachwal, B., Rademacker, J. H., Rama, M., Ramos Pernas, M., Rangel, M. S., Raniuk, I., Ratnikov, F., Raven, G., Ravonel Salzgeber, M., Reboud, M., Redi, F., Reichert, S., dos Reis, A. C., Remon Alepuz, C., Renaudin, V., Ricciardi, S., Richards, S., Rihl, M., Rinnert, K., Rives Molina, V., Robbe, P., Rodrigues, A. B., Rodrigues, E., Rodriguez Lopez, J. A., Rodriguez Perez, P., Rogozhnikov, A., Roiser, S., Rollings, A., Romanovskiy, V., Romero Vidal, A., Ronayne, J. W., Rotondo, M., Rudolph, M. S., Ruf, T., Ruiz Valls, P., Ruiz Vidal, J., Saborido Silva, J. J., Sadykhov, E., Sagidova, N., Saitta, B., Salustino Guimaraes, V., Sanchez Mayordomo, C., Sanmartin Sedes, B., Santacesaria, R., Santamarina Rios, C., Santimaria, M., Santovetti, E., Sarpis, G., Sarti, A., Satriano, C., Satta, A., Saunders, D. M., Savrina, D., Schael, S., Schellenberg, M., Schiller, M., Schindler, H., Schlupp, M., Schmelling, M., Schmelzer, T., Schmidt, B., Schneider, O., Schopper, A., Schreiner, H. F., Schubert, K., Schubiger, M., Schune, M.-H., Schwemmer, R., Sciascia, B., Sciubba, A., Semennikov, A., Sergi, A., Serra, N., Serrano, J., Sestini, L., Seyfert, P., Shapkin, M., Shapoval, I., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Siddi, B. G., Silva Coutinho, R., Silva de Oliveira, L., Simi, G., Simone, S., Sirendi, M., Skidmore, N., Skwarnicki, T., Smith, E., Smith, I. T., Smith, J., Smith, M., Soares Lavra, l., Sokoloff, M. D., Soler, F. J. P., Souza De Paula, B., Spaan, B., Spradlin, P., Sridharan, S., Stagni, F., Stahl, M., Stahl, S., Stefko, P., Stefkova, S., Steinkamp, O., Stemmle, S., Stenyakin, O., Stepanova, M., Stevens, H., Stone, S., Storaci, B., Stracka, S., Stramaglia, M. E., Straticiuc, M., Straumann, U., Sun, L., Sutcliffe, W., Swientek, K., Syropoulos, V., Szczekowski, M., Szumlak, T., Szymanski, M., T’Jampens, S., Tayduganov, A., Tekampe, T., Tellarini, G., Teubert, F., Thomas, E., van Tilburg, J., Tilley, M. J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Toriello, F., Tourinho Jadallah Aoude, R., Tournefier, E., Traill, M., Tran, M. T., Tresch, M., Trisovic, A., Tsaregorodtsev, A., Tsopelas, P., Tully, A., Tuning, N., Ukleja, A., Ustyuzhanin, A., Uwer, U., Vacca, C., Vagner, A., Vagnoni, V., Valassi, A., Valat, S., Valenti, G., Vazquez Gomez, R., Vazquez Regueiro, P., Vecchi, S., van Veghel, M., Velthuis, J. J., Veltri, M., Veneziano, G., Venkateswaran, A., Verlage, T. A., Vernet, M., Vesterinen, M., Viana Barbosa, J. V., Viaud, B., Vieira, D., Vieites Diaz, M., Viemann, H., Vilasis-Cardona, X., Vitti, M., Volkov, V., Vollhardt, A., Voneki, B., Vorobyev, A., Vorobyev, V., Voß, C., de Vries, J. A., Vázquez Sierra, C., Waldi, R., Wallace, C., Wallace, R., Walsh, J., Wang, J., Ward, D. R., Wark, H. M., Watson, N. K., Websdale, D., Weiden, A., Whitehead, M., Wicht, J., Wilkinson, G., Wilkinson, M., Williams, M., Williams, M. P., Williams, M., Williams, T., Wilson, F. F., Wimberley, J., Winn, M., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wraight, K., Wyllie, K., Xie, Y., Xu, Z., Yang, Z., Yang, Z., Yao, Y., Yin, H., Yu, J., Yuan, X., Yushchenko, O., Zarebski, K. A., Zavertyaev, M., Zhang, L., Zhang, Y., Zhelezov, A., Zheng, Y., Zhu, X., Zhukov, V., Zonneveld, J. B., and Zucchelli, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:2470-0010
ISSN (Online):2470-0029
Published Online:25 April 2018
Copyright Holders:Copyright © 2018 CERN, for the LHCb Collaboration
First Published:First published in Physical Review D 97(7): 072013
Publisher Policy:Reproduced under a Creative Commons License

University Staff: Request a correction | Enlighten Editors: Update this record