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Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV

We present the first wide-range measurement of the charged-particle pseudorapidity density distribution, for different centralities (the 0-5%, 5-10%, 10-20%, and 20-30% most central events) in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV at the LHC. The measurement is performed using the full cove...

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Autores principales: Abbas, Ehab, Abelev, Betty, Adam, Jaroslav, Adamova, Dagmar, Adare, Andrew Marshall, Aggarwal, Madan, Aglieri Rinella, Gianluca, Agnello, Michelangelo, Agocs, Andras Gabor, Agostinelli, Andrea, Ahammed, Zubayer, Ahmad, Arshad, Ahmad, Nazeer, Ahn, Sang Un, Ahn, Sul-Ah, Aimo, Ilaria, Ajaz, Muhammad, Akindinov, Alexander, Aleksandrov, Dmitry, Alessandro, Bruno, Alici, Andrea, Alkin, Anton, Almaraz Avina, Erick Jonathan, Alme, Johan, Alt, Torsten, Altini, Valerio, Altinpinar, Sedat, Altsybeev, Igor, Andrei, Cristian, Andronic, Anton, Anguelov, Venelin, Anielski, Jonas, Anson, Christopher Daniel, Anticic, Tome, Antinori, Federico, Antonioli, Pietro, Aphecetche, Laurent Bernard, Appelshauser, Harald, Arbor, Nicolas, Arcelli, Silvia, Arend, Andreas, Armesto, Nestor, Arnaldi, Roberta, Aronsson, Tomas Robert, Arsene, Ionut Cristian, Arslandok, Mesut, Asryan, Andzhey, Augustinus, Andre, Averbeck, Ralf Peter, Awes, Terry, Aysto, Juha Heikki, Azmi, Mohd Danish, Bach, Matthias Jakob, Badala, Angela, Baek, Yong Wook, Bailhache, Raphaelle Marie, Bala, Renu, Baldisseri, Alberto, Baltasar Dos Santos Pedrosa, Fernando, Ban, Jaroslav, Baral, Rama Chandra, Barbera, Roberto, Barile, Francesco, Barnafoldi, Gergely Gabor, Barnby, Lee Stuart, Barret, Valerie, Bartke, Jerzy Gustaw, Basile, Maurizio, Bastid, Nicole, Basu, Sumit, Bathen, Bastian, Batigne, Guillaume, Batyunya, Boris, Batzing, Paul Christoph, Baumann, Christoph Heinrich, Bearden, Ian Gardner, Beck, Hans, Behera, Nirbhay Kumar, Belikov, Iouri, Bellini, Francesca, Bellwied, Rene, Belmont-Moreno, Ernesto, Bencedi, Gyula, Beole, Stefania, Berceanu, Ionela, Bercuci, Alexandru, Berdnikov, Yaroslav, Berenyi, Daniel, Bergognon, Anais Annick Erica, Bertens, Redmer Alexander, Berzano, Dario, Betev, Latchezar, Bhasin, Anju, Bhati, Ashok Kumar, Bhom, Jihyun, Bianchi, Nicola, Bianchi, Livio, Bianchin, Chiara, Bielcik, Jaroslav, Bielcikova, Jana, Bilandzic, Ante, Bjelogrlic, Sandro, Blanco, F, Blanco, Francescorancesco, Blau, Dmitry, Blume, Christoph, Boccioli, Marco, Boettger, Stefan, Bogdanov, Alexey, Boggild, Hans, Bogolyubsky, Mikhail, Boldizsar, Laszlo, Bombara, Marek, Book, Julian, Borel, Herve, Borissov, Alexander, Bossu, Francesco, Botje, Michiel, Botta, Elena, Braidot, Ermes, Braun-Munzinger, Peter, Bregant, Marco, Breitner, Timo Gunther, Broker, Theo Alexander, Browning, Tyler Allen, Broz, Michal, Brun, Rene, Bruna, Elena, Bruno, Giuseppe Eugenio, Budnikov, Dmitry, Buesching, Henner, Bufalino, Stefania, Buncic, Predrag, Busch, Oliver, Buthelezi, Edith Zinhle, Caffarri, Davide, Cai, Xu, Caines, Helen Louise, Calvo Villar, Ernesto, Camerini, Paolo, Canoa Roman, Veronica, Cara Romeo, Giovanni, Carena, Francesco, Carena, Wisla, Carlin Filho, Nelson, Carminati, Federico, Casanova Diaz, Amaya Ofelia, Castillo Castellanos, Javier Ernesto, Castillo Hernandez, Juan Francisco, Casula, Ester Anna Rita, Catanescu, Vasile, Cavicchioli, Costanza, Ceballos Sanchez, Cesar, Cepila, Jan, Cerello, Piergiorgio, Chang, Beomsu, Chapeland, Sylvain, Charvet, Jean-Luc Fernand, Chattopadhyay, Subhasis, Chattopadhyay, Sukalyan, Cherney, Michael Gerard, Cheshkov, Cvetan, Cheynis, Brigitte, Chibante Barroso, Vasco Miguel, Chinellato, David, Chochula, Peter, Chojnacki, Marek, Choudhury, Subikash, Christakoglou, Panagiotis, Christensen, Christian Holm, Christiansen, Peter, Chujo, Tatsuya, Chung, Suh-Urk, Cicalo, Corrado, Cifarelli, Luisa, Cindolo, Federico, Cleymans, Jean Willy Andre, Colamaria, Fabio, Colella, Domenico, Collu, Alberto, Conesa Balbastre, Gustavo, Conesa del Valle, Zaida, Connors, Megan Elizabeth, Contin, Giacomo, Contreras, Jesus Guillermo, Cormier, Thomas Michael, Corrales Morales, Yasser, Cortese, Pietro, Cortes Maldonado, Ismael, Cosentino, Mauro Rogerio, Costa, Filippo, Cotallo, Manuel Enrique, Crescio, Elisabetta, Crochet, Philippe, Cruz Alaniz, Emilia, Cruz Albino, Rigoberto, Cuautle, Eleazar, Cunqueiro, Leticia, Dainese, Andrea, Dalsgaard, Hans Hjersing, Dang, Ruina, Danu, Andrea, Das, Kushal, Das, Indranil, Das, Supriya, Das, Debasish, Dash, Ajay Kumar, Dash, Sadhana, De, Sudipan, de Barros, Gabriel, De Caro, Annalisa, de Cataldo, Giacinto, de Cuveland, Jan, De Falco, Alessandro, De Gruttola, Daniele, Delagrange, Hugues, Deloff, Andrzej, De Marco, Nora, Denes, Ervin, De Pasquale, Salvatore, Deppman, Airton, D'Erasmo, Ginevra, de Rooij, Raoul Stefan, Diaz Corchero, Miguel Angel, Di Bari, Domenico, Dietel, Thomas, Di Giglio, Carmelo, Di Liberto, Sergio, Di Mauro, Antonio, Di Nezza, Pasquale, Divia, Roberto, Djuvsland, Oeystein, Dobrin, Alexandru Florin, Dobrowolski, Tadeusz Antoni, Donigus, Benjamin, Dordic, Olja, Driga, Olga, Dubey, Anand Kumar, Dubla, Andrea, Ducroux, Laurent, Dupieux, Pascal, Dutta Majumdar, AK, Elia, Domenico, Emschermann, David Philip, Engel, Heiko, Erazmus, Barbara, Erdal, Hege Austrheim, Eschweiler, Dominic, Espagnon, Bruno, Estienne, Magali Danielle, Esumi, Shinichi, Evans, David, Evdokimov, Sergey, Eyyubova, Gyulnara, Fabris, Daniela, Faivre, Julien, Falchieri, Davide, Fantoni, Alessandra, Fasel, Markus, Fehlker, Dominik, Feldkamp, Linus, Felea, Daniel, Feliciello, Alessandro, Fenton-Olsen, Bo, Feofilov, Grigory, Fernandez Tellez, Arturo, Ferretti, Alessandro, Festanti, Andrea, Figiel, Jan, Figueredo, Marcel, Filchagin, Sergey, Finogeev, Dmitry, Fionda, Fiorella, Fiore, Enrichetta Maria, Floratos, Emmanuel, Floris, Michele, Foertsch, Siegfried Valentin, Foka, Panagiota, Fokin, Sergey, Fragiacomo, Enrico, Francescon, Andrea, Frankenfeld, Ulrich Michael, Fuchs, Ulrich, Furget, Christophe, Fusco Girard, Mario, Gaardhoje, Jens Joergen, Gagliardi, Martino, Gago, Alberto, Gallio, Mauro, Gangadharan, Dhevan Raja, Ganoti, Paraskevi, Garabatos, Jose, Garcia-Solis, Edmundo, Gargiulo, Corrado, Garishvili, Irakli, Gerhard, Jochen, Germain, Marie, Geuna, Claudio, Gheata, Andrei George, Gheata, Mihaela, Ghidini, Bruno, Ghosh, Premomoy, Gianotti, Paola, Girard, Martin Robert, Giubellino, Paolo, Gladysz-Dziadus, Ewa, 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Herghelegiu, Andrei Ionut, Herrera Corral, Gerardo Antonio, Herrmann, Norbert, Hess, Benjamin Andreas, Hetland, Kristin Fanebust, Hicks, Bernard, Hippolyte, Boris, Hori, Yasuto, Hristov, Peter Zahariev, Hrivnacova, Ivana, Huang, Meidana, Humanic, Thomas, Hwang, Dae Sung, Ichou, Raphaelle, Ilkaev, Radiy, Ilkiv, Iryna, Inaba, Motoi, Incani, Elisa, Innocenti, Pier Giorgio, Innocenti, Gian Michele, Ippolitov, Mikhail, Irfan, Muhammad, Ivan, Cristian George, Ivanov, Vladimir, Ivanov, Andrey, Ivanov, Marian, Ivanytskyi, Oleksii, Jacholkowski, Adam Wlodzimierz, Jacobs, Peter, Jahnke, Cristiane, Jang, Haeng Jin, Janik, Malgorzata Anna, Jayarathna, Sandun, Jena, Satyajit, Jha, Deeptanshu Manu, Jimenez Bustamante, Raul Tonatiuh, Jones, Peter Graham, Jung, Hyung Taik, Jusko, Anton, Kaidalov, Alexei, Kalcher, Sebastian, Kalinak, Peter, Kalliokoski, Tuomo Esa Aukusti, Kalweit, Alexander Philipp, Kang, Ju Hwan, Kaplin, Vladimir, Kar, Somnath, Karasu Uysal, Ayben, Karavichev, Oleg, Karavicheva, Tatiana, Karpechev, Evgeny, Kazantsev, Andrey, Kebschull, Udo Wolfgang, Keidel, Ralf, Ketzer, Bernhard Franz, Khan, Kamal Hussain, Khan, Mohisin Mohammed, Khan, Palash, Khan, Shuaib Ahmad, Khanzadeev, Alexei, Kharlov, Yury, Kileng, Bjarte, Kim, Minwoo, Kim, Se Yong, Kim, Beomkyu, Kim, Taesoo, Kim, Dong Jo, Kim, Do Won, Kim, Jonghyun, Kim, Jin Sook, Kim, Mimae, Kirsch, Stefan, Kisel, Ivan, Kiselev, Sergey, Kisiel, Adam Ryszard, Klay, Jennifer Lynn, Klein, Jochen, Klein-Bosing, Christian, Kliemant, Michael, Kluge, Alexander, Knichel, Michael Linus, Knospe, Anders Garritt, Kohler, Markus, Kollegger, Thorsten, Kolojvari, Anatoly, Kompaniets, Mikhail, Kondratiev, Valery, Kondratyeva, Natalia, Konevskih, Artem, Kovalenko, Vladimir, Kowalski, Marek, Kox, Serge, Koyithatta Meethaleveedu, Greeshma, Kral, Jiri, Kralik, Ivan, Kramer, Frederick, Kravcakova, Adela, Krelina, Michal, Kretz, Matthias, Krivda, Marian, Krizek, Filip, Krus, Miroslav, Kryshen, Evgeny, Krzewicki, Mikolaj, Kucera, Vit, Kucheriaev, Yury, Kugathasan, Thanushan, Kuhn, Christian Claude, Kuijer, Paul, Kulakov, Igor, Kumar, Jitendra, Kurashvili, Podist, Kurepin, A, Kurepin, AB, Kuryakin, Alexey, Kushpil, Svetlana, Kushpil, Vasily, Kvaerno, Henning, Kweon, Min Jung, Kwon, Youngil, Ladron de Guevara, Pedro, Lakomov, Igor, Langoy, Rune, La Pointe, Sarah Louise, Lara, Camilo Ernesto, Lardeux, Antoine Xavier, La Rocca, Paola, Lea, Ramona, Lechman, Mateusz, Lee, Sung Chul, Lee, Graham Richard, Legrand, Iosif, Lehnert, Joerg Walter, Lemmon, Roy Crawford, Lenhardt, Matthieu Laurent, Lenti, Vito, Leon, Hermes, Leoncino, Marco, Leon Monzon, Ildefonso, Levai, Peter, Li, Shuang, Lien, Jorgen, Lietava, Roman, Lindal, Svein, Lindenstruth, Volker, Lippmann, Christian, Lisa, Michael Annan, Ljunggren, Hans Martin, Lodato, Davide Francesco, Loenne, Per-Ivar, Loggins, Vera, Loginov, Vitaly, Lohner, Daniel, Loizides, Constantinos, Loo, Kai Krister, Lopez, Xavier Bernard, Lopez Torres, Ernesto, Lovhoiden, Gunnar, Lu, Xianguo, Luettig, Philipp, Lunardon, Marcello, Luo, Jiebin, Luparello, Grazia, Luzzi, Cinzia, Ma, Ke, Ma, Rongrong, Madagodahettige-Don, Dilan Minthaka, Maevskaya, Alla, Mager, Magnus, Mahapatra, Durga Prasad, Maire, Antonin, Malaev, Mikhail, Maldonado Cervantes, Ivonne Alicia, Malinina, Ludmila, Mal'Kevich, Dmitry, Malzacher, Peter, Mamonov, Alexander, Manceau, Loic Henri Antoine, Mangotra, Lalit Kumar, Manko, Vladislav, Manso, Franck, Manzari, Vito, Mao, Yaxian, Marchisone, Massimiliano, Mares, Jiri, Margagliotti, Giacomo Vito, Margotti, Anselmo, Marin, Ana Maria, Markert, Christina, Marquard, Marco, Martashvili, Irakli, Martin, Nicole Alice, Martinengo, Paolo, Martinez, Mario Ivan, Martinez Garcia, Gines, Martynov, Yevgen, Mas, Alexis Jean-Michel, Masciocchi, Silvia, Masera, Massimo, Masoni, Alberto, Massacrier, Laure Marie, Mastroserio, Annalisa, Matyja, Adam Tomasz, Mayer, Christoph, Mazer, Joel, Mazzoni, Alessandra Maria, Meddi, Franco, Menchaca-Rocha, Arturo Alejandro, Mercado Perez, Jorge, Meres, Michal, Miake, Yasuo, Mikhaylov, Konstantin, Milano, Leonardo, Milosevic, Jovan, Mischke, Andre, Mishra, Aditya Nath, Miskowiec, Dariusz, Mitu, Ciprian Mihai, Mizuno, Sanshiro, Mlynarz, Jocelyn, Mohanty, Bedangadas, Molnar, Levente, Montano Zetina, Luis Manuel, Monteno, Marco, Montes, Esther, Moon, Taebong, Morando, Maurizio, Moreira De Godoy, Denise Aparecida, Moretto, Sandra, Morreale, Astrid, Morsch, Andreas, Muccifora, Valeria, Mudnic, Eugen, Muhuri, Sanjib, Mukherjee, Maitreyee, Muller, Hans, Munhoz, Marcelo, Murray, Sean, Musa, Luciano, Musinsky, Jan, Nandi, Basanta Kumar, Nania, Rosario, Nappi, Eugenio, Nattrass, Christine, Nayak, Tapan Kumar, Nazarenko, Sergey, Nedosekin, Alexander, Nicassio, Maria, Niculescu, Mihai, Nielsen, Borge Svane, Niida, Takafumi, Nikolaev, Sergey, Nikolic, Vedran, Nikulin, Sergey, Nikulin, Vladimir, Nilsen, Bjorn Steven, Nilsson, Mads Stormo, Noferini, Francesco, Nomokonov, Petr, Nooren, Gerardus, Nyanin, Alexandre, Nyatha, Anitha, Nygaard, Casper, Nystrand, Joakim Ingemar, Ochirov, Alexander, Oeschler, Helmut Oskar, Oh, Saehanseul, Oh, Sun Kun, Oleniacz, Janusz, Oliveira Da Silva, Antonio Carlos, Oppedisano, Chiara, Ortiz Velasquez, Antonio, Oskarsson, Anders Nils Erik, Ostrowski, Piotr Krystian, Otwinowski, Jacek Tomasz, Oyama, Ken, Ozawa, Kyoichiro, Pachmayer, Yvonne Chiara, Pachr, Milos, Padilla, Fatima, Pagano, Paola, Paic, Guy, Painke, Florian, Pajares, Carlos, Pal, Susanta Kumar, Palaha, Arvinder Singh, Palmeri, Armando, Papikyan, Vardanush, Pappalardo, Giuseppe, Park, Woo Jin, Passfeld, Annika, Patalakha, Dmitri Ivanovich, Paticchio, Vincenzo, Paul, Biswarup, Pavlinov, Alexei, Pawlak, Tomasz Jan, Peitzmann, Thomas, Pereira Da Costa, Hugo Denis Antonio, Pereira De Oliveira Filho, Elienos, Peresunko, Dmitri, Perez Lara, Carlos Eugenio, Perrino, Davide, Peryt, Wiktor Stanislaw, Pesci, Alessandro, Pestov, Yury, Petracek, Vojtech, Petran, Michal, Petris, Mariana, Petrov, Plamen Rumenov, Petrovici, Mihai, Petta, Catia, Piano, Stefano, Pikna, Miroslav, Pillot, Philippe, Pinazza, Ombretta, Pinsky, Lawrence, Pitz, Nora, Piyarathna, Danthasinghe, Planinic, Mirko, Ploskon, Mateusz Andrzej, Pluta, Jan Marian, Pocheptsov, Timur, Pochybova, Sona, Podesta Lerma, Pedro Luis Manuel, Poghosyan, Martin, Polak, Karel, Polichtchouk, Boris, Poljak, Nikola, Pop, Amalia, Porteboeuf-Houssais, Sarah, Pospisil, Vladimir, Potukuchi, Baba, Prasad, Sidharth Kumar, Preghenella, Roberto, Prino, Francesco, Pruneau, Claude Andre, Pshenichnov, Igor, Puddu, Giovanna, Punin, Valery, Putis, Marian, Putschke, Jorn Henning, Qvigstad, Henrik, Rachevski, Alexandre, Rademakers, Alphonse, Raiha, Tomi Samuli, Rak, Jan, Rakotozafindrabe, Andry Malala, Ramello, Luciano, Raniwala, Sudhir, Raniwala, Rashmi, Rasanen, Sami Sakari, Rascanu, Bogdan Theodor, Rathee, Deepika, Rauch, Wolfgang, Read, Kenneth Francis, Real, Jean-Sebastien, Redlich, Krzysztof, Reed, Rosi Jan, Rehman, Attiq Ur, Reichelt, Patrick, Reicher, Martijn, Renfordt, Rainer Arno Ernst, Reolon, Anna Rita, Reshetin, Andrey, Rettig, Felix Vincenz, Revol, Jean-Pierre, Reygers, Klaus Johannes, Riccati, Lodovico, Ricci, Renato Angelo, Richert, Tuva, Richter, Matthias Rudolph, Riedler, Petra, Riegler, Werner, Riggi, Francesco, Rodriguez Cahuantzi, Mario, Rodriguez Manso, Alis, Roed, Ketil, Rogochaya, Elena, Rohr, David, Rohrich, Dieter, Romita, Rosa, Ronchetti, Federico, Rosnet, Philippe, Rossegger, Stefan, Rossi, Andrea, Roy, Pradip Kumar, Roy, Christelle Sophie, Rubio Montero, Antonio Juan, Rui, Rinaldo, Russo, Riccardo, Ryabinkin, Evgeny, Rybicki, Andrzej, Sadovsky, Sergey, Safarik, Karel, Sahoo, Raghunath, Sahu, Pradip Kumar, Saini, Jogender, Sakaguchi, Hiroaki, Sakai, Shingo, Sakata, Dosatsu, Salgado, Carlos Albert, Salzwedel, Jai, Sambyal, Sanjeev Singh, Samsonov, Vladimir, Sanchez Castro, Xitzel, Sandor, Ladislav, Sandoval, Andres, Sano, Masato, Santagati, Gianluca, Santoro, Romualdo, Sarkamo, Juho Jaako, Sarkar, Debojit, Scapparone, Eugenio, Scarlassara, Fernando, Scharenberg, Rolf Paul, Schiaua, Claudiu Cornel, Schicker, Rainer Martin, Schmidt, Hans Rudolf, Schmidt, Christian Joachim, Schuchmann, Simone, Schukraft, Jurgen, Schuster, Tim, Schutz, Yves Roland, Schwarz, Kilian Eberhard, Schweda, Kai Oliver, Scioli, Gilda, Scomparin, Enrico, Scott, Rebecca, Scott, Patrick Aaron, Segato, Gianfranco, Selyuzhenkov, Ilya, Senyukov, Serhiy, Seo, Jeewon, Serci, Sergio, Serradilla, Eulogio, Sevcenco, Adrian, Shabetai, Alexandre, Shabratova, Galina, Shahoyan, Ruben, Sharma, Natasha, Sharma, Satish, Sharma, Rohni, Shigaki, Kenta, Shtejer, Katherin, Sibiriak, Yury, Sicking, Eva, Siddhanta, Sabyasachi, Siemiarczuk, Teodor, Silvermyr, David Olle Rickard, Silvestre, Catherine, Simatovic, Goran, Simonetti, Giuseppe, Singaraju, Rama Narayana, Singh, Ranbir, Singha, Subhash, Singhal, Vikas, Sinha, Bikash, Sinha, Tinku, Sitar, Branislav, Sitta, Mario, Skaali, Bernhard, Skjerdal, Kyrre, Smakal, Radek, Smirnov, Nikolai, Snellings, 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Janka, Vulpescu, Bogdan, Vyushin, Alexey, Wagner, Boris, Wagner, Vladimir, Wan, Renzhuo, Wang, Yaping, Wang, Mengliang, Wang, Yifei, Watanabe, Kengo, Weber, Michael, Wessels, Johannes, Westerhoff, Uwe, Wiechula, Jens, Wikne, Jon, Wilde, Martin Rudolf, Wilk, Grzegorz Andrzej, Williams, Crispin, Windelband, Bernd Stefan, Xaplanteris Karampatsos, Leonidas, Yaldo, Chris G, Yamaguchi, Yorito, Yang, Shiming, Yang, Ping, Yang, Hongyan, Yasnopolsky, Stanislav, Yi, JunGyu, Yin, Zhongbao, Yoo, In-Kwon, Yoon, Jongik, Yu, Weilin, Yuan, Xianbao, Yushmanov, Igor, Zaccolo, Valentina, Zach, Cenek, Zampolli, Chiara, Zaporozhets, Sergey, Zarochentsev, Andrey, Zavada, Petr, Zaviyalov, Nikolai, Zbroszczyk, Hanna Paulina, Zelnicek, Pierre, Zgura, Sorin Ion, Zhalov, Mikhail, Zhang, Haitao, Zhang, Xiaoming, Zhang, Yonghong, Zhou, Daicui, Zhou, Fengchu, Zhou, You, Zhu, Hongsheng, Zhu, Jianlin, Zhu, Xiangrong, Zhu, Jianhui, Zichichi, Antonino, Zimmermann, Alice, Zinovjev, Gennady, Zoccarato, Yannick Denis, Zynovyev, Mykhaylo, Zyzak, Maksym
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2013.09.022
http://cds.cern.ch/record/1528555
Descripción
Sumario:We present the first wide-range measurement of the charged-particle pseudorapidity density distribution, for different centralities (the 0-5%, 5-10%, 10-20%, and 20-30% most central events) in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV at the LHC. The measurement is performed using the full coverage of the ALICE detectors, -5.0 < $\eta$ < 5.5, and employing a special analysis technique based on collisions arising from LHC ' satellite' bunches. We present the pseudorapidity density as a function of the number of participating nucleons as well as an extrapolation to the total number of produced charged particles ($N_{ch}$ = 17165 +/- 772 for the 0-5% most central collisions). From the measured d$N_{ch}$/d$\eta$ distribution we derive the rapidity density distribution, d$N_{ch}$/dy, under simple assumptions. The rapidity density distribution is found to be significantly wider than the predictions of the Landau model, which reproduce data well at RHIC energies. We assess the validity of longitudinal scaling by comparing to lower energy results from RHIC. Finally the mechanisms of the underlying particle production are discussed based on a comparison with various theoretical models.