2016
article
Measurement of the mass and lifetime of the Ωb- baryon
R Aaij, C. Abellan Beteta, B Adeva, M Adinolfi, A. Affolder, Z Ajaltouni, S Akar, J Albrecht, F. Alessio, M P Alexander, S. Ali, G. Alkhazov, P. Cartelle, A. Alves, S Amato, S. Amerio, Y. Amhis, L An, L Anderlini, G. Andreassi, M Andreotti, J. Andrews, R. Appleby, O. Aquines Gutierrez, F Archilli, P. d'Argent, A Artamonov, M Artuso, E Aslanides, G. Auriemma, M. Baalouch, S Bachmann, J. Back, A. Badalov, C. Baesso, W Baldini, R. Barlow, C. Barschel, S Barsuk, W Barter, V. Batozskaya, V. Battista, A Bay, L. Beaucourt, J. Beddow, F Bedeschi, I. Bediaga, L. Bel, V. Bellee, N. Belloli, I Belyaev, E Ben-Haim, G Bencivenni, S. Benson, J. Benton, A Berezhnoy, R. Bernet, A Bertolin, F Betti, M. Bettler, M. van Beuzekom, S. Bifani, P. Billoir, T. Bird, A. Birnkraut, A Bizzeti, T Blake, F Blanc, J. Blouw, S Blusk, V. Bocci, A. Bondar, N Bondar, W. Bonivento, A. Borgheresi, S Borghi, M. Borisyak, M Borsato, T. Bowcock, E. Bowen, C Bozzi, S. Braun, M. Britsch, T. Britton, J Brodzicka, N. Brook, E Buchanan, C Burr, A. Bursche, J Buytaert, S Cadeddu, R Calabrese, M Calvi, M. Gomez, P Campana, D. Perez, L Capriotti, A Carbone, G. Carboni, R Cardinale, A Cardini, P Carniti, L. Carson, K Akiba, G Casse, L. Cassina, L. Garcia, M Cattaneo, C. Cauet, G Cavallero, R. Cenci, M Charles, P. Charpentier, G. Chatzikonstantinidis, M Chefdeville, S. Chen, S Cheung, N. Chiapolini, M Chrzaszcz, X. Vidal, G Ciezarek, P. Clarke, M Clemencic, H Cliff, J Closier, V Coco, J Cogan, E Cogneras, V. Cogoni, L Cojocariu, G. Collazuol, P. Collins, A Comerma-Montells, A Contu, A. Cook, M. Coombes, S. Coquereau, G Corti, M. Corvo, B Couturier, G. Cowan, D. Craik, A. Crocombe, M. Torres, S. Cunliffe, R Currie, C D’Ambrosio, E Dall’Occo, J Dalseno, P. David, A. Davis, O De Aguiar Francisco, K De Bruyn, S De Capua, M De Cian, J. De Miranda, L De Paula, P De Simone, C. Dean, D Decamp, M. Deckenhoff, L Del Buono, N. Deleage, M. Demmer, D. Derkach, O Deschamps, F Dettori, B Dey, A. Di Canto, F. Di Ruscio, H. Dijkstra, S. Donleavy, F Dordei, M. Dorigo, A. Suarez, A. Dovbnya, K. Dreimanis, L Dufour, G. Dujany, K. Dungs, P Durante, R. Dzhelyadin, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S. Eidelman, S Eisenhardt, U. Eitschberger, R. Ekelhof, L Eklund, I. Rifai, C. Elsässer, S Ely, S Esen, H. Evans, T Evans, A. Falabella, C. Färber, N. Farley, S. Farry, R. Fay, D Fazzini, D. Ferguson, V. Albor, F Ferrari, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, M. Fiore, M Fiorini, M Firlej, C Fitzpatrick, T Fiutowski, F Fleuret, K. Fohl, P. Fol, M Fontana, F. Fontanelli, D. Forshaw, R. Forty, M Frank, C Frei, M. Frosini, J. Fu, E. Furfaro, A Gallas Torreira, D Galli, S. Gallorini, S Gambetta, M Gandelman, P Gandini, Y. ; https://orcid.org/0000-0001-8576-0970 Gao, J. Pardiñas, J. Tico, L Garrido, D. Gascon, C Gaspar, L. Gavardi, G. Gazzoni, D. Gerick, E Gersabeck, M Gersabeck, T Gershon, P. Ghez, S. Giani, V Gibson, O. Girard, L. Giubega, V. Gligorov, C Göbel, D Golubkov, A Golutvin, A. Gomes, C Gotti, M. Gándara, R. Diaz, L. Cardoso, E Graugés, E Graverini, G Graziani, A. Grecu, P. Griffith, L Grillo, O. Grünberg, B. Gui, E Gushchin, Y Guz, T Gys, T Hadavizadeh, C Hadjivasiliou, G Haefeli, C Haen, S. Haines, S. Hall, B. Hamilton, X Han, S Hansmann-Menzemer, N Harnew, S. Harnew, J. Harrison, J He, T. Head, V. Heijne, A. Heister, K Hennessy, P. Henrard, L Henry, J. Morata, E van Herwijnen, M. Hess, A Hicheur, D W Hill, M. Hoballah, C. Hombach, W Hulsbergen, T. Humair, M Hushchyn, N. Hussain, D Hutchcroft, D. Hynds, M Idzik, P Ilten, R. Jacobsson, A. Jaeger, J. Jalocha, E Jans, A Jawahery, M John, D. Johnson, C. Jones, C. Joram, B Jost, N Jurik, S Kandybei, W. Kanso, M Karacson, T. Karbach, S. Karodia, M. Kecke, M. Kelsey, I. Kenyon, M Kenzie, T Ketel, E. Khairullin, B Khanji, C. Khurewathanakul, T Kirn, S Klaver, K Klimaszewski, O. Kochebina, M. Kolpin, I. Komarov, R. Koopman, P Koppenburg, M. Kozeiha, L Kravchuk, K. Kreplin, M Kreps, G. Krocker, P Krokovny, F. Kruse, W Krzemien, W. Kucewicz, M Kucharczyk, V Kudryavtsev, A. Kuonen, K. Kurek, T. Kvaratskheliya, D Lacarrere, G. Lafferty, A Lai, D. Lambert, G Lanfranchi, C Langenbruch, B. Langhans, T Latham, C Lazzeroni, R. Gac, J. van Leerdam, J. Lees, R Lefèvre, A Leflat, J. Lefrancois, E Lemos Cid, O Leroy, T Lesiak, B Leverington, Y. Li, T. Likhomanenko, M. Liles, R Lindner, C. Linn, F. Lionetto, B. Liu, X. Liu, D. Loh, I. Longstaff, J A M Lopes, D Lucchesi, M. Martínez, H. Luo, A Lupato, E Luppi, O. Lupton, N. Lusardi, A. Lusiani, F Machefert, F Maciuc, O. Maev, K. Maguire, S Malde, A Malinin, G Manca, G Mancinelli, P. Manning, A. Mapelli, J. Maratas, J. Marchand, U Marconi, C. Benito, P. Marino, J Marks, G Martellotti, M. Martin, M Martinelli, D Martinez Santos, F Martinez Vidal, D. Tostes, L. Massacrier, A Massafferri, R Matev, A Mathad, Z. Mathe, C Matteuzzi, A Mauri, B. Maurin, A. Mazurov, M McCann, J. McCarthy, A McNab, R McNulty, B Meadows, F. Meier, M. Meissner, D Melnychuk, M Merk, A Merli, E. Michielin, D. Milanes, M. Minard, D. Mitzel, J. Rodriguez, I. Monroy, S Monteil, M. Morandin, P. Morawski, A. Morda, M. Morello, J Moron, A. Morris, R Mountain, F Muheim, D. Muller, J Muller, K. Müller, V. Müller, M. Mussini, B. Muster, P Naik, T Nakada, R Nandakumar, A. Nandi, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, M. Neuner, A. Nguyen, C. Nguyen-Mau, V. Niess, S. Nieswand, R. Niet, N Nikitin, T. Nikodem, A. Novoselov, D. O'Hanlon, A Oblakowska-Mucha, V Obraztsov, S. Ogilvy, O Okhrimenko, R Oldeman, C. Onderwater, B. Rodrigues, J. Goicochea, A. Otto, P Owen, A Oyanguren, A Palano, F. Palombo, M Palutan, J. Panman, A Papanestis, M Pappagallo, L. Pappalardo, C Pappenheimer, W. Parker, C Parkes, G Passaleva, G. Patel, M Patel, C Patrignani, A. Pearce, A Pellegrino, G. Penso, M Pepe Altarelli, S Perazzini, P Perret, L. Pescatore, K Petridis, A Petrolini, M. Petruzzo, E. Olloqui, B Pietrzyk, M. Pikies, D Pinci, A. Pistone, A. Piucci, S. Playfer, M. Casasus, T. Poikela, F Polci, A Poluektov, I Polyakov, E Polycarpo, A. Popov, D Popov, B. Popovici, C. Potterat, E. Price, Jack Price, J. Prisciandaro, A. Pritchard, C Prouve, V Pugatch, A. Navarro, G Punzi, W Qian, R Quagliani, B. Rachwal, J. Rademacker, M. Rama, M. Pernas, M. Rangel, I. Raniuk, G Raven, F Redi, S. Reichert, A. dos Reis, V. Renaudin, S Ricciardi, S. Richards, M. Rihl, K Rinnert, V. Molina, P Robbe, A. Rodrigues, E Rodrigues, J. Lopez, P. Perez, A. Rogozhnikov, S. Roiser, V. Romanovsky, A. Vidal, J. Ronayne, M Rotondo, T. Ruf, P. Valls, J. Silva, N Sagidova, B Saitta, V. Guimaraes, C. Mayordomo, B. Sedes, R Santacesaria, C. Rios, M Santimaria, E Santovetti, A. Sarti, C Satriano, A Satta, D. Saunders, D Savrina, S Schael, M Schiller, H Schindler, M. Schlupp, M Schmelling, T. Schmelzer, B Schmidt, O Schneider, A Schopper, M. Schubiger, M. Schune, R. Schwemmer, B Sciascia, A. Sciubba, A Semennikov, N Serra, J. Serrano, L Sestini, P. Seyfert, M Shapkin, I. Shapoval, Y. Shcheglov, T Shears, L Shekhtman, V Shevchenko, A. Shires, B. Siddi, R. Coutinho, L. de Oliveira, G Simi, M. Sirendi, N Skidmore, T Skwarnicki, E. Smith, I. Smith, J. Smith, M R Smith, H. Snoek, M. Sokoloff, F. Soler, F. Soomro, D. Souza, B. De Paula, B. Spaan, P Spradlin, S. Sridharan, F Stagni, M Stahl, S Stahl, S. Stefkova, O Steinkamp, O. Stenyakin, S. Stevenson, S. Stoica, S. Stone, B. Storaci, S. Stracka, M. Straticiuc, U. Straumann, L Sun, W Sutcliffe, K Swientek, S. Swientek, V. Syropoulos, M. Szczekowski, T Szumlak, S T’Jampens, A. Tayduganov, T. Tekampe, G. Tellarini, F. Teubert, C. Thomas, E Thomas, J. van Tilburg, V Tisserand, M Tobin, J. Todd, S. Tolk, L Tomassetti, D. Tonelli, S. Topp-Joergensen, E. Tournefier, S. Tourneur, K. Trabelsi, M. Traill, M. Tran, M. Tresch, A. Trisovic, A. Tsaregorodtsev, P. Tsopelas, N Tuning, A Ukleja, A Ustyuzhanin, U. Uwer, C. Vacca, V Vagnoni, G Valenti, A. Vallier, R. Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, M van Veghel, J. Velthuis, M Veltri, G. Veneziano, M Vesterinen, B. Viaud, D. Vieira, M. Diaz, X Vilasis-Cardona, V. Volkov, A. Vollhardt, D. Voong, A. Vorobyev, V. Vorobyev, C. Voss, J. de Vries, R. Waldi, C. Wallace, R. Wallace, J Walsh, J. Wang, D. Ward, N. Watson, D Websdale, A. Weiden, M Whitehead, J. Wicht, G Wilkinson, M. Wilkinson, M Williams, T. Williams, F. Wilson, J. Wimberley, J. Wishahi, W Wislicki, M Witek, G Wormser, S A Wotton, K. Wraight, S. Wright, K Wyllie, Y. Xie, Z Xu, Z Yang, J Yu, X Yuan, O. Yushchenko, M. Zangoli, M Zavertyaev, L. Zhang, Y. Zhang, A Zhelezov, A. Zhokhov, L. Zhong, V Zhukov, S. Zucchelli
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Le résumé fourni par la source
A new algorithm for the determination of the initial flavour of $B_s^0$ mesons is presented. The algorithm is based on two neural networks and exploits the $b$ hadron production mechanism at a hadron collider. The first network is trained to select charged kaons produced in association with the $B_s^0$ meson. The second network combines the kaon charges to assign the $B_s^0$ flavour and estimates the probability of a wrong assignment. The algorithm is calibrated using data corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by the LHCb experiment in proton-proton collisions at 7 and 8 TeV centre-of-mass energies. The calibration is performed in two ways: by resolving the $B_s^0$-$\bar{B}_s^0$ flavour oscillations in $B_s^0 \to D_s^- \pi^+$ decays, and by analysing flavour-specific $B_{s 2}^{*}(5840)^0 \to B^+ K^-$ decays. The tagging power measured in $B_s^0 \to D_s^- \pi^+$ decays is found to be $(1.80 \pm 0.19({\rm stat}) \pm 0.18({\rm syst}))$\%, which is an improvement of about 50\% compared to a similar algorithm previously used in the LHCb experiment.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsComputational Physics and Python Applications