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Measurement of the electron reconstruction efficiency at LHCb

The single electron track-reconstruction efficiency is determined using a sample corresponding to $1.3~\mathrm{fb}^{-1}$of $pp$ collision data recorded with the LHCb detector in 2017. This measurement exploits $B^+\to J/\psi (e^+e^-)K^+$ decays, where one of the electrons is fully reconstructed and...

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Autores principales: Aaij, Roel, Abellán Beteta, Carlos, Ackernley, Thomas, Adeva, Bernardo, Adinolfi, Marco, Afsharnia, Hossein, Aidala, Christine Angela, Aiola, Salvatore, Ajaltouni, Ziad, Akar, Simon, Albicocco, Pietro, Albrecht, Johannes, Alessio, Federico, Alexander, Michael, Alfonso Albero, Alejandro, Alkhazov, Georgy, Alvarez Cartelle, Paula, Alves Jr, Antonio Augusto, Amato, Sandra, Amhis, Yasmine, An, Liupan, Anderlini, Lucio, Andreassi, Guido, Andreotti, Mirco, Archilli, Flavio, Arnau Romeu, Joan, Artamonov, Alexander, Artuso, Marina, Arzymatov, Kenenbek, Aslanides, Elie, Atzeni, Michele, Audurier, Benjamin, Bachmann, Sebastian, Back, John, Baker, Sophie, Balagura, Vladislav, Baldini, Wander, Baranov, Alexander, Barlow, Roger, Barsuk, Sergey, Barter, William, Bartolini, Matteo, Baryshnikov, Fedor, Bassi, Giovanni, Batozskaya, Varvara, Batsukh, Baasansuren, Battig, Alexander, Battista, Vincenzo, Bay, Aurelio, Becker, Maik, Bedeschi, Franco, Bediaga, Ignacio, Beiter, Andrew, Bel, Lennaert, Belavin, Vladislav, Belin, Samuel, Beliy, Nikita, Bellee, Violaine, Belous, Konstantin, Belyaev, Ivan, Bencivenni, Giovanni, Ben-Haim, Eli, Benson, Sean, Beranek, Sarah, Berezhnoy, Alexander, Bernet, Roland, Berninghoff, Daniel, Bernstein, Harris Conan, Bertholet, Emilie, Bertolin, Alessandro, Betancourt, Christopher, Betti, Federico, Bettler, Marc-Olivier, Bezshyiko, Iaroslava, Bhasin, Srishti, Bhom, Jihyun, Bieker, Martin Stefan, Bifani, Simone, Billoir, Pierre, Birnkraut, Alex, Bizzeti, Andrea, Bjørn, Mikkel, Blago, Michele Piero, Blake, Thomas, Blanc, Frederic, Blusk, Steven, Bobulska, Dana, Bocci, Valerio, Boente Garcia, Oscar, Boettcher, Thomas, Boldyrev, Alexey, Bondar, Alexander, Bondar, Nikolay, Borghi, Silvia, Borisyak, Maxim, Borsato, Martino, Borsuk, Jozef Tomasz, Boubdir, Meriem, Bowcock, Themistocles, Bozzi, Concezio, Braun, Svende, Brea Rodriguez, Alexandre, Brodski, Michael, Brodzicka, Jolanta, Brossa Gonzalo, Arnau, Brundu, Davide, Buchanan, Emma, Buonaura, Annarita, Burr, Christopher, Bursche, Albert, Butter, Jordy Sebastiaan, Buytaert, Jan, Byczynski, Wiktor, Cadeddu, Sandro, Cai, Hao, Calabrese, Roberto, Cali, Stefano, Calladine, Ryan, Calvi, Marta, Calvo Gomez, Miriam, Camboni, Alessandro, Campana, Pierluigi, Campora Perez, Daniel Hugo, Capriotti, Lorenzo, Carbone, Angelo, Carboni, Giovanni, Cardinale, Roberta, Cardini, Alessandro, Carniti, Paolo, Carvalho Akiba, Kazuyoshi, Casais Vidal, Adrian, Casse, Gianluigi, Cattaneo, Marco, Cavallero, Giovanni, Cenci, Riccardo, Cerasoli, Jacopo, Chapman, Matthew George, Charles, Matthew, Charpentier, Philippe, Chatzikonstantinidis, Georgios, Chefdeville, Maximilien, Chekalina, Viktoriia, Chen, Chen, Chen, Shanzhen, Chernov, Aleksei, Chitic, Stefan-Gabriel, Chobanova, Veronika, Chrzaszcz, Marcin, Chubykin, Alexsei, Ciambrone, Paolo, Cicala, Maria Flavia, Cid Vidal, Xabier, Ciezarek, Gregory, Cindolo, Federico, Clarke, Peter, Clemencic, Marco, Cliff, Harry, Closier, Joel, Cobbledick, John Leslie, Coco, Victor, Coelho, Joao A B, Cogan, Julien, Cogneras, Eric, Cojocariu, Lucian, Collins, Paula, Colombo, Tommaso, Comerma-Montells, Albert, Contu, Andrea, Cooke, Naomi, Coombs, George, Coquereau, Samuel, Corti, Gloria, Costa Sobral, Cayo Mar, Couturier, Benjamin, Cowan, Greig, Craik, Daniel Charles, Crocombe, Andrew, Cruz Torres, Melissa Maria, Currie, Robert, Da Silva, Cesar Luiz, Dall'Occo, Elena, Dalseno, Jeremy, D'Ambrosio, Carmelo, Danilina, Anna, d'Argent, Philippe, Davis, Adam, De Aguiar Francisco, Oscar, De Bruyn, Kristof, De Capua, Stefano, De Cian, Michel, De Miranda, Jussara, De Paula, Leandro, De Serio, Marilisa, De Simone, Patrizia, de Vries, Jacco, Dean, Cameron Thomas, Dean, William, Decamp, Daniel, Del Buono, Luigi, Delaney, Blaise, Dembinski, Hans Peter, Demmer, Moritz, Dendek, Adam, Denysenko, Vadym, Derkach, Denis, Deschamps, Olivier, Desse, Fabrice, Dettori, Francesco, Dey, Biplab, Di Canto, Angelo, Di Nezza, Pasquale, Didenko, Sergey, Dijkstra, Hans, Dordei, Francesca, Dorigo, Mirco, dos Reis, Alberto, Dosil Suárez, Alvaro, Douglas, Lauren, Dovbnya, Anatoliy, Dreimanis, Karlis, Dudek, Maciej Wojciech, Dufour, Laurent, Dujany, Giulio, Durante, Paolo, Durham, John Matthew, Dutta, Deepanwita, Dzhelyadin, Rustem, Dziewiecki, Michal, Dziurda, Agnieszka, Dzyuba, Alexey, Easo, Sajan, Egede, Ulrik, Egorychev, Victor, Eidelman, Semen, Eisenhardt, Stephan, Ekelhof, Robert, Ek-In, Surapat, Eklund, Lars, Ely, Scott, Ene, Alexandru, Escher, Stephan, Esen, Sevda, Evans, Timothy, Falabella, Antonio, Fan, Jingzhou, Farley, Nathanael, Farry, Stephen, Fazzini, Davide, Féo, Mauricio, Fernandez Declara, Placido, Fernandez Prieto, Antonio, Ferrari, Fabio, Ferreira Lopes, Lino, Ferreira Rodrigues, Fernando, Ferreres Sole, Silvia, Ferro-Luzzi, Massimiliano, Filippov, Sergey, Fini, Rosa Anna, Fiorini, Massimiliano, Firlej, Miroslaw, Fischer, Kamil Leszek, Fitzpatrick, Conor, Fiutowski, Tomasz, Fleuret, Frederic, Fontana, Marianna, Fontanelli, Flavio, Forty, Roger, Franco Lima, Vinicius, Franco Sevilla, Manuel, Frank, Markus, Frei, Christoph, Friday, David Anthony, Fu, Jinlin, Funk, Wolfgang, Gabriel, Emmy, Gallas Torreira, Abraham, Galli, Domenico, Gallorini, Stefano, Gambetta, Silvia, Gan, Yuyue, Gandelman, Miriam, Gandini, Paolo, Gao, Yuanning, Garcia Martin, Luis Miguel, García Pardiñas, Julián, Garcia Plana, Beatriz, Garcia Rosales, Felipe Andres, Garra Tico, Jordi, Garrido, Lluis, Gascon, David, Gaspar, Clara, Gazzoni, Giulio, Gerick, David, Gersabeck, Evelina, Gersabeck, Marco, Gershon, Timothy, Gerstel, Dawid, Ghez, Philippe, Gibson, Valerie, Gioventù, Alessandra, Girard, Olivier Göran, Gironella Gironell, Pere, Giubega, Lavinia-Helena, Giugliano, Carmen, Gizdov, Konstantin, Gligorov, Vladimir, Göbel, Carla, Golubkov, Dmitry, Golutvin, Andrey, Gomes, Alvaro, Gorelov, Igor Vladimirovich, Gotti, Claudio, Govorkova, Ekaterina, Grabowski, Jascha Peter, Graciani Diaz, Ricardo, Grammatico, Thomas, Granado Cardoso, Luis Alberto, Graugés, Eugeni, Graverini, Elena, Graziani, Giacomo, Grecu, Alexandru, Greim, Roman, Griffith, Peter, Grillo, Lucia, Gruber, Lukas, Gruberg Cazon, Barak Raimond, Gu, Chenxi, Gushchin, Evgeny, Guth, Andreas, Guz, Yury, Gys, Thierry, Hadavizadeh, Thomas, Hadjivasiliou, Christos, Haefeli, Guido, Haen, Christophe, Haines, Susan, Hamilton, Phoebe Meredith, Han, Qundong, Han, Xiaoxue, Hancock, Thomas Henry, Hansmann-Menzemer, Stephanie, Harnew, Neville, Harrison, Thomas, Hart, Robert, Hasse, Christoph, Hatch, Mark, He, Jibo, Hecker, Malte, Heijhoff, Kevin, Heinicke, Kevin, Heister, Arno, Hennequin, Arthur Marius, Hennessy, Karol, Henry, Louis, Heß, Miriam, Heuel, Johannes, Hicheur, Adlène, Hidalgo Charman, Raoul, Hill, Donal, Hilton, Martha, Hopchev, Plamen Hristov, Hu, Jiangqiao, Hu, Wenhua, Huang, Wenqian, Huard, Zachary, Hulsbergen, Wouter, Humair, Thibaud, Hunter, Ross John, Hushchyn, Mikhail, Hutchcroft, David, Hynds, Daniel, Ibis, Philipp, Idzik, Marek, Ilten, Philip, Inglessi, Alexander, Inyakin, Alexander, Ivshin, Kuzma, Jacobsson, Richard, Jakobsen, Sune, Jalocha, Pawel, Jans, Eddy, Jashal, Brij Kishor, Jawahery, Abolhassan, Jevtic, Vukan, Jiang, Feng, John, Malcolm, Johnson, Daniel, Jones, Christopher, Jost, Beat, Jurik, Nathan, Kandybei, Sergii, Karacson, Matthias, Kariuki, James Mwangi, Karodia, Sarah, Kazeev, Nikita, Kecke, Matthieu, Keizer, Floris, Kelsey, Matthew, Kenzie, Matthew, Ketel, Tjeerd, Khanji, Basem, Kharisova, Anastasiia, Khurewathanakul, Chitsanu, Kim, Kyung Eun, Kirn, Thomas, Kirsebom, Veronica Soelund, Klaver, Suzanne, Klimaszewski, Konrad, Koliiev, Serhii, Kondybayeva, Almagul, Konoplyannikov, Anatoly, Kopciewicz, Pawel, Kopecna, Renata, Koppenburg, Patrick, Kostiuk, Igor, Kot, Oleksander, Kotriakhova, Sofia, Kozeiha, Mohamad, Kravchuk, Leonid, Krawczyk, Rafal Dominik, Kreps, Michal, Kress, Felix Johannes, Kretzschmar, Sophie Katharina, Krokovny, Pavel, Krupa, Wojciech, Krzemien, Wojciech, Kucewicz, Wojciech, Kucharczyk, Marcin, Kudryavtsev, Vasily, Kuindersma, Hilbrand Steffen, Kunde, Gerd Joachim, Kuonen, Axel Kevin, Kvaratskheliya, Tengiz, Lacarrere, Daniel, Lafferty, George, Lai, Adriano, Lancierini, Davide, Lane, John Jake, Lanfranchi, Gaia, Langenbruch, Christoph, Latham, Thomas, Lazzari, Federico, Lazzeroni, Cristina, Le Gac, Renaud, Lefèvre, Regis, Leflat, Alexander, Lemaitre, Florian, Leroy, Olivier, Lesiak, Tadeusz, Leverington, Blake, Li, Hengne, Li, Pei-Rong, Li, Xuan, Li, Yiming, Li, Zhuoming, Liang, Xixin, Lindner, Rolf, Lionetto, Federica, Lisovskyi, Vitalii, Liu, Guoming, Liu, Xuesong, Loh, David, Loi, Angelo, Lomba Castro, Julian, Longstaff, Iain, Lopes, Jose, Loustau, Guillermo, Lovell, George Holger, Lucchesi, Donatella, Lucio Martinez, Miriam, Luo, Yiheng, Lupato, Anna, Luppi, Eleonora, Lupton, Oliver, Lusiani, Alberto, Lyu, Xiao-Rui, Maccolini, Serena, Machefert, Frederic, Maciuc, Florin, Macko, Vladimir, Mackowiak, Patrick, Maddrell-Mander, Samuel, Madhan Mohan, Lakshan Ram, Maev, Oleg, Maevskiy, Artem, Maguire, Kevin, Maisuzenko, Dmitrii, Majewski, Maciej Witold, Malde, Sneha, Malecki, Bartosz, Malinin, Alexander, Maltsev, Timofei, Malygina, Hanna, Manca, Giulia, Mancinelli, Giampiero, Manera Escalero, Rafel, Manuzzi, Daniele, Marangotto, Daniele, Maratas, Jan, Marchand, Jean François, Marconi, Umberto, Mariani, Saverio, Marin Benito, Carla, Marinangeli, Matthieu, Marino, Pietro, Marks, Jörg, Marshall, Phillip John, Martellotti, Giuseppe, Martinazzoli, Loris, Martinelli, Maurizio, Martinez Santos, Diego, Martinez Vidal, Fernando, Massafferri, André, Materok, Marcel, Matev, Rosen, Mathad, Abhijit, Mathe, Zoltan, Matiunin, Viacheslav, Matteuzzi, Clara, Mattioli, Kara Renee, Mauri, Andrea, Maurice, Emilie, McCann, Michael, Mcconnell, Lucas, McNab, Andrew, McNulty, Ronan, Mead, James Vincent, Meadows, Brian, Meaux, Cedric, Meinert, Nis, Melnychuk, Dmytro, Meloni, Simone, Merk, Marcel, Merli, Andrea, Michielin, Emanuele, Milanes, Diego Alejandro, Millard, Edward James, Minard, Marie-Noelle, Mineev, Oleg, Minzoni, Luca, Mitchell, Sara Elizabeth, Mitreska, Biljana, Mitzel, Dominik Stefan, Mödden, Antje, Mogini, Andrea, Moise, Razvan Daniel, Mombächer, Titus, Monroy, Igancio Alberto, Monteil, Stephane, Morandin, Mauro, Morello, Gianfranco, Morello, Michael Joseph, Moron, Jakub, Morris, Adam Benjamin, Morris, Andrew George, Mountain, Raymond, Mu, Hongjie, Muheim, Franz, Mukherjee, Maitreyee, Mulder, Mick, Müller, Dominik, Müller, Janine, Müller, Katharina, Müller, Vanessa, Murphy, Colm Harold, Murray, Donal, Muzzetto, Piera, Naik, Paras, Nakada, Tatsuya, Nandakumar, Raja, Nandi, Anita, Nanut, Tara, Nasteva, Irina, Needham, Matthew, Neri, Nicola, Neubert, Sebastian, Neufeld, Niko, Newcombe, Ryan, Nguyen, Thi Dung, Nguyen-Mau, Chung, Niel, Elisabeth Maria, Nieswand, Simon, Nikitin, Nikolay, Nolte, Niklas Stefan, Oblakowska-Mucha, Agnieszka, Obraztsov, Vladimir, Ogilvy, Stephen, O'Hanlon, Daniel Patrick, Oldeman, Rudolf, Onderwater, Gerco, Osborn, Joseph Daniel, Ossowska, Anna, Otalora Goicochea, Juan Martin, Ovsiannikova, Tatiana, Owen, Patrick, Oyanguren, Maria Aranzazu, Pais, Preema Rennee, Pajero, Tommaso, Palano, Antimo, Palutan, Matteo, Panshin, Gennady, Papanestis, Antonios, Pappagallo, Marco, Pappalardo, Luciano, Parker, William, Parkes, Christopher, Passaleva, Giovanni, Pastore, Alessandra, Patel, Mitesh, Patrignani, Claudia, Pearce, Alex, Pellegrino, Antonio, Penso, Gianni, Pepe Altarelli, Monica, Perazzini, Stefano, Pereima, Dmitrii, Perret, Pascal, Pescatore, Luca, Petridis, Konstantinos, Petrolini, Alessandro, Petrov, Aleksandr, Petrucci, Stefano, Petruzzo, Marco, Pietrzyk, Boleslaw, Pietrzyk, Guillaume, Pikies, Malgorzata, Pili, Martina, Pinci, Davide, Pinzino, Jacopo, Pisani, Flavio, Piucci, Alessio, Placinta, Vlad-Mihai, Playfer, Stephen, Plews, Jonathan, Plo Casasus, Maximo, Polci, Francesco, Poli Lener, Marco, Poliakova, Mariia, Poluektov, Anton, Polukhina, Natalia, Polyakov, Ivan, Polycarpo, Erica, Pomery, Gabriela Johanna, Ponce, Sebastien, Popov, Alexander, Popov, Dmitry, Poslavskii, Stanislav, Prasanth, Kodassery, Promberger, Laura, Prouve, Claire, Pugatch, Valery, Puig Navarro, Albert, Pullen, Hannah Louise, Punzi, Giovanni, Qian, Wenbin, Qin, Jia-Jia, Quagliani, Renato, Quintana, Boris, Raab, Naomi Veronika, Rachwal, Bartlomiej, Rademacker, Jonas, Rama, Matteo, Ramos Pernas, Miguel, Rangel, Murilo, Ratnikov, Fedor, Raven, Gerhard, Ravonel Salzgeber, Melody, Reboud, Meril, Redi, Federico, Reichert, Stefanie, Reiss, Florian, Remon Alepuz, Clara, Ren, Zan, Renaudin, Victor, Ricciardi, Stefania, Richards, Sophie, Rinnert, Kurt, Robbe, Patrick, Robert, Arnaud, Rodrigues, Ana Barbara, Rodrigues, Eduardo, Rodriguez Lopez, Jairo Alexis, Roehrken, Markus, Roiser, Stefan, Rollings, Alexandra Paige, Romanovskiy, Vladimir, Romero Lamas, Marcos, Romero Vidal, Antonio, Roth, Jordan Daniel, Rotondo, Marcello, Rudolph, Matthew Scott, Ruf, Thomas, Ruiz Vidal, Joan, Ryzka, Jakub, Saborido Silva, Juan Jose, Sagidova, Naylya, Saitta, Biagio, Sanchez Gras, Cristina, Sanchez Mayordomo, Carlos, Sanmartin Sedes, Brais, Santacesaria, Roberta, Santamarina Rios, Cibran, Santimaria, Marco, Santovetti, Emanuele, Sarpis, Gediminas, Sarti, Alessio, Satriano, Celestina, Satta, Alessia, Saur, Miroslav, Savrina, Darya, Scantlebury Smead, Luke George, Schael, Stefan, Schellenberg, Margarete, Schiller, Manuel, Schindler, Heinrich, Schmelling, Michael, Schmelzer, Timon, Schmidt, Burkhard, Schneider, Olivier, Schopper, Andreas, Schreiner, HF, Schubiger, Maxime, Schulte, Sebastian, Schune, Marie Helene, Schwemmer, Rainer, Sciascia, Barbara, Sciubba, Adalberto, Sellam, Sara, Semennikov, Alexander, Sergi, Antonino, Serra, Nicola, Serrano, Justine, Sestini, Lorenzo, Seuthe, Alex, Seyfert, Paul, Shangase, Desmond Mzamo, Shapkin, Mikhail, Shears, Tara, Shekhtman, Lev, Shevchenko, Vladimir, Shmanin, Evgenii, Shupperd, Joseph David, Siddi, Benedetto Gianluca, Silva Coutinho, Rafael, Silva de Oliveira, Luiz Gustavo, Simi, Gabriele, Simone, Saverio, Skiba, Igor, Skidmore, Nicola, Skwarnicki, Tomasz, Slater, Mark, Smeaton, John Gordon, Smith, Eluned, Smith, Iwan Thomas, Smith, Mark, Soares, Marcelo, Soares Lavra, Lais, Sokoloff, Michael, Soler, Paul, Souza De Paula, Bruno, Spaan, Bernhard, Spadaro Norella, Elisabetta, Spradlin, Patrick, Stagni, Federico, Stahl, Marian, Stahl, Sascha, Stefko, Pavol, Stefkova, Slavomira, Steinkamp, Olaf, Stemmle, Simon, Stenyakin, Oleg, Stepanova, Margarita, Stevens, Holger, Stocchi, Achille, Stone, Sheldon, Stracka, Simone, Stramaglia, Maria Elena, Straticiuc, Mihai, Straumann, Ulrich, Strokov, Sergey, Sun, Jiayin, Sun, Liang, Sun, Yipeng, Svihra, Peter, Swientek, Krzysztof, Szabelski, Adam, Szumlak, Tomasz, Szymanski, Maciej Pawel, Taneja, Shantam, Tang, Zhipeng, Tekampe, Tobias, Tellarini, Giulia, Teubert, Frederic, Thomas, Eric, Thomson, Kayleigh Anne, Tilley, Matthew James, Tisserand, Vincent, T'Jampens, Stephane, Tobin, Mark, Tolk, Siim, Tomassetti, Luca, Tonelli, Diego, Tou, Da Yu, Tournefier, Edwige, Traill, Murdo, Tran, Minh Tâm, Trisovic, Ana, Tsaregorodtsev, Andrei, Tuci, Giulia, Tully, Alison, Tuning, Niels, Ukleja, Artur, Usachov, Andrii, Ustyuzhanin, Andrey, Uwer, Ulrich, Vagner, Alexander, Vagnoni, Vincenzo, Valassi, Andrea, Valat, Sebastien, Valenti, Giovanni, van Beuzekom, Martinus, Van Hecke, Hubert, van Herwijnen, Eric, Van Hulse, Charlotte Barbara, van Tilburg, Jeroen, van Veghel, Maarten, Vazquez Gomez, Ricardo, Vazquez Regueiro, Pablo, Vázquez Sierra, Carlos, Vecchi, Stefania, Velthuis, Jaap, Veltri, Michele, Venkateswaran, Aravindhan, Vernet, Maxime, Veronesi, Michele, Vesterinen, Mika, Viana Barbosa, Joao Vitor, Vieira, Daniel, Vieites Diaz, Maria, Viemann, Harald, Vilasis-Cardona, Xavier, Vitkovskiy, Arseniy, Volkov, Vladimir, Vollhardt, Achim, Vom Bruch, Dorothea, Voneki, Balazs, Vorobyev, Alexey, Vorobyev, Vitaly, Voropaev, Nikolai, Waldi, Roland, Walsh, John, Wang, Jianqiao, Wang, Jianchun, Wang, Mengzhen, Wang, Yilong, Wang, Zhenzi, Ward, David, Wark, Heather Mckenzie, Watson, Nigel, Websdale, David, Weiden, Andreas, Weisser, Constantin, Westhenry, Benedict Donald C, White, Dylan James, Whitehead, Mark, Wiedner, Dirk, Wilkinson, Guy, Wilkinson, Michael, Williams, Ifan, Williams, Mike, Williams, Mark Richard James, Williams, Timothy, Wilson, Fergus, Winn, Michael Andreas, Wislicki, Wojciech, Witek, Mariusz, Wormser, Guy, Wotton, Stephen, Wu, Hangyi, Wyllie, Kenneth, Xiang, Zhiyu, Xiao, Dong, Xie, Yuehong, Xing, Hongxi, Xu, Ao, Xu, Li, Xu, Menglin, Xu, Qingnian, Xu, Zhirui, Xu, Zehua, Yang, Zhenwei, Yang, Zishuo, Yao, Yuezhe, Yeomans, Lauren Emma, Yin, Hang, Yu, Jiesheng, Yuan, Xuhao, Yushchenko, Oleg, Zarebski, Kristian Alexander, Zavertyaev, Mikhail, Zdybal, Milosz, Zeng, Ming, Zhang, Dongliang, Zhang, Liming, Zhang, Shunan, Zhang, Wen Chao, Zhang, Yanxi, Zhelezov, Alexey, Zheng, Yangheng, Zhou, Xiaokang, Zhou, Yixiong, Zhu, Xianglei, Zhukov, Valery, Zonneveld, Jennifer Brigitta, Zucchelli, Stefano
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1748-0221/14/11/P11023
http://cds.cern.ch/record/2688983
Descripción
Sumario:The single electron track-reconstruction efficiency is determined using a sample corresponding to $1.3~\mathrm{fb}^{-1}$of $pp$ collision data recorded with the LHCb detector in 2017. This measurement exploits $B^+\to J/\psi (e^+e^-)K^+$ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the $B^+$-meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. The presented method allows LHCb to measure branching fractions involving single electrons with a an electron reconstruction systematic uncertainty below $1\%$.