The ALICE experiment at the LHC has studied J/ψ production at midrapidity in pp collisions at √s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity Lint = 5.6 nb−1. The fraction of J/ψ from the decay of long-lived beauty hadrons was determined for J/ψ candidates with transverse momentum pt > 1.3GeV/c and rapidity |y| < 0.9. The cross section for prompt J/ψ mesons, i.e. directly produced J/ψ and prompt decays of heavier charmonium states such as the ψ(2S) and χc resonances, is σprompt J/ψ (pt > 1.3 GeV/c, |y| < 0.9) = 8.3±0.8 (stat.) ± 1.1 (syst.) +1.5 −1.4 (syst. pol.) μb. The cross section for the production of b-hadrons decaying to J/ψ with pt > 1.3GeV/c and |y| < 0.9 is σJ/ψ←hB (pt > 1.3 GeV/c, |y| < 0.9) = 1.46 ± 0.38 (stat.) +0.26 −0.32 (syst.) μb. The results are compared to QCD model predictions. The shape of the pt and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the bb pair total cross section and dσ/dy at mid-rapidity.
Measurement of prompt J/ψ and beauty hadron production cross sections at mid-rapidity in pp collisions at √s=7 TeV / Betty, Abelev; Jaroslav, Adam; Dagmar, Adamova; Andrew Marshall, Adare; Madan, Aggarwal; Gianluca Aglieri, Rinella; Andras Gabor, Agocs; Andrea, Agostinelli; Saul Aguilar, Salazar; Zubayer, Ahammed; Arshad, Ahmad; Nazeer, Ahmad; Sul Ah, Ahn; Sang Un, Ahn; Alexander, Akindinov; Dmitry, Aleksandrov; Bruno, Alessandro; Jose Ruben Alfaro, Molina; Andrea, Alici; Anton, Alkin; Erick Jonathan Almaraz, Avina; Johan, Alme; Torsten, Alt; Valerio, Altini; Sedat, Altinpinar; Igor, Altsybeev; Cristian, Andrei; Anton, Andronic; Venelin, Anguelov; Jonas, Anielski; Christopher Daniel, Anson; Tome, Anticic; Federico, Antinori; Pietro, Antonioli; Laurent Bernard, Aphecetche; Harald, Appelshauser; Nicolas, Arbor; Silvia, Arcelli; Andreas, Arend; Nestor, Armesto; Roberta, Arnaldi; Tomas Robert, Aronsson; Ionut Cristian, Arsene; Mesut, Arslandok; Andzhey, Asryan; Andre, Augustinus; Ralf Peter, Averbeck; Terry, Awes; Juha Heikki, Aysto; Mohd Danish, Azmi; Matthias Jakob, Bach; Angela, Badala; Yong Wook, Baek; Raphaelle Marie, Bailhache; Renu, Bala; Rinaldo Baldini, Ferroli; Alberto, Baldisseri; Alain, Baldit; Fernando Baltasar Santos, Pedrosa; Jaroslav, Ban; Rama Chandra, Baral; Roberto, Barbera; Francesco, Barile; Gergely Gabor, Barnafoldi; Lee Stuart, Barnby; Valerie, Barret; Jerzy Gustaw, Bartke; Maurizio, Basile; Nicole, Bastid; Sumit, Basu; Bastian, Bathen; Guillaume, Batigne; Boris, Batyunya; Christoph Heinrich, Baumann; Ian Gardner, Bearden; Hans, Beck; Nirbhay Kumar, Behera; Iouri, Belikov; Francesca, Bellini; Rene, Bellwied; Ernesto Belmont, Moreno; Gyula, Bencedi; Stefania, Beole; Ionela, Berceanu; Alexandru, Bercuci; Yaroslav, Berdnikov; Daniel, Berenyi; Anais Annick Erica, Bergognon; Dario, Berzano; Latchezar, Betev; Anju, Bhasin; Ashok Kumar, Bhati; Jihyun, Bhom; Livio, Bianchi; Nicola, Bianchi; Chiara, Bianchin; Jaroslav, Bielcik; Jana, Bielcikova; Ante, Bilandzic; Sandro, Bjelogrlic; F., Blanco; Francesco, Blanco; Dmitry, Blau; Christoph, Blume; Marco, Boccioli; Nicolas, Bock; Stefan, Boettger; Alexey, Bogdanov; Hans, Boggild; Mikhail, Bogolyubsky; Laszlo, Boldizsar; Marek, Bombara; Julian, Book; Herve, Borel; Alexander, Borissov; Suvendu Nath, Bose; Francesco, Bossu; Michiel, Botje; Bruno Alexandre, Boyer; Ermes, Braidot; Peter Braun, Munzinger; Bregant, Marco; Timo Gunther, Breitner; Tyler Allen, Browning; Michal, Broz; Rene, Brun; Elena, Bruna; Giuseppe Eugenio, Bruno; Dmitry, Budnikov; Henner, Buesching; Stefania, Bufalino; Kyrylo, Bugaiev; Oliver, Busch; Edith Zinhle, Buthelezi; Diego Caballero, Orduna; Davide, Caffarri; Xu, Cai; Helen Louise, Caines; Ernesto Calvo, Villar; Camerini, Paolo; Veronica Canoa, Roman; Giovanni Cara, Romeo; Francesco, Carena; Wisla, Carena; Nelson Carlin, Filho; Federico, Carminati; Camilo Andres Carrillo, Montoya; Amaya Ofelia Casanova, Diaz; Javier Ernesto Castillo, Castellanos; Juan Francisco Castillo, Hernandez; Ester Anna Rita, Casula; Vasile, Catanescu; Costanza, Cavicchioli; Cesar Ceballos, Sanchez; Jan, Cepila; Piergiorgio, Cerello; Beomsu, Chang; Sylvain, Chapeland; Jean Luc Fernand, Charvet; Subhasis, Chattopadhyay; Sukalyan, Chattopadhyay; Isha, Chawla; Michael Gerard, Cherney; Cvetan, Cheshkov; Brigitte, Cheynis; Vasco Miguel Chibante, Barroso; David, Chinellato; Peter, Chochula; Marek, Chojnacki; Subikash, Choudhury; Panagiotis, Christakoglou; Christian Holm, Christensen; Peter, Christiansen; Tatsuya, Chujo; Suh Urk, Chung; Corrado, Cicalo; Luisa, Cifarelli; Federico, Cindolo; Jean Willy Andre, Cleymans; Fabrizio, Coccetti; Fabio, Colamaria; Domenico, Colella; Gustavo Conesa, Balbastre; Zaida Conesa, Valle; Paul, Constantin; Contin, Giacomo; Jesus Guillermo, Contreras; Thomas Michael, Cormier; Yasser Corrales, Morales; Pietro, Cortese; Ismael Cortes, Maldonado; Mauro Rogerio, Cosentino; Filippo, Costa; Manuel Enrique, Cotallo; Elisabetta, Crescio; Philippe, Crochet; Emilia Cruz, Alaniz; Eleazar, Cuautle; Leticia, Cunqueiro; Andrea, Dainese; Hans Hjersing, Dalsgaard; Andrea, Danu; Debasish, Das; Indranil, Das; Kushal, Das; Sadhana, Dash; Ajay Kumar, Dash; Sudipan, De; Gabriel, Barros; Annalisa, Caro; Giacinto, Cataldo; Jan, Cuveland; Alessandro, Falco; Daniele, Gruttola; Hugues, Delagrange; Andrzej, Deloff; Vyacheslav, Demanov; Nora, Marco; Ervin, Denes; Salvatore, Pasquale; Airton, Deppman; Ginevra, D’Erasmo; Raoul Stefan, Rooij; Miguel Angel Diaz, Corchero; Domenico, Bari; Carmelo, Giglio; Thomas, Dietel; Sergio, Liberto; Antonio, Mauro; Pasquale, Nezza; Roberto, Divia; Oeystein, Djuvsland; Alexandru Florin, Dobrin; Tadeusz Antoni, Dobrowolski; Isabel, Dominguez; Benjamin, Donigus; Olja, Dordic; Olga, Driga; Anand Kumar, Dubey; Laurent, Ducroux; Pascal, Dupieux; Mihir Ranjan Dutta, Majumdar; A. K., Dutta Majumdar; Domenico, Elia; David Philip, Emschermann; Heiko, Engel; Hege Austrheim, Erdal; Bruno, Espagnon; Magali Danielle, Estienne; Shinichi, Esumi; David, Evans; Gyulnara, Eyyubova; Daniela, Fabris; Julien, Faivre; Davide, Falchieri; Alessandra, Fantoni; Markus, Fasel; Roger Worsley, Fearick; Anatoly, Fedunov; Dominik, Fehlker; Linus, Feldkamp; Daniel, Felea; Bo Fenton, Olsen; Grigory, Feofilov; Arturo Fernandez, Tellez; Alessandro, Ferretti; Roberta, Ferretti; Jan, Figiel; Marcel, Figueredo; Sergey, Filchagin; Dmitry, Finogeev; Fiorella, Fionda; Enrichetta Maria, Fiore; Michele, Floris; Siegfried Valentin, Foertsch; Panagiota, Foka; Sergey, Fokin; Fragiacomo, Enrico; Ulrich Michael, Frankenfeld; Ulrich, Fuchs; Christophe, Furget; Mario Fusco, Girard; Jens Joergen, Gaardhoje; Martino, Gagliardi; Alberto, Gago; Mauro, Gallio; Dhevan Raja, Gangadharan; Paraskevi, Ganoti; Jose, Garabatos; Edmundo Garcia, Solis; Irakli, Garishvili; Jochen, Gerhard; Marie, Germain; Claudio, Geuna; Andrei George, Gheata; Mihaela, Gheata; Bruno, Ghidini; Premomoy, Ghosh; Paola, Gianotti; Martin Robert, Girard; Paolo, Giubellino; Ewa Gladysz, Dziadus; Peter, Glassel; Ramon, Gomez; Alexey, Gonschior; Elena Gonzalez, Ferreiro; Laura Helena Gonzalez, Trueba; Pedro Gonzalez, Zamora; Sergey, Gorbunov; Ankita, Goswami; Sven, Gotovac; Varlen, Grabski; Lukasz Kamil, Graczykowski; Robert, Grajcarek; Alessandro, Grelli; Costin, Grigoras; Alina Gabriela, Grigoras; Vladislav, Grigoriev; Ara, Grigoryan; Smbat, Grigoryan; Boris, Grinyov; Nevio, Grion; Philippe, Gros; Jan Fiete Grosse, Oetringhaus; Jean Yves, Grossiord; Grosso, Raffaele; Fedor, Guber; Rachid, Guernane; Cesar Guerra, Gutierrez; Barbara, Guerzoni; Maxime Rene Joseph, Guilbaud; Kristjan Herlache, Gulbrandsen; Taku, Gunji; Anik, Gupta; Ramni, Gupta; Hans, Gutbrod; Oystein Senneset, Haaland; Cynthia Marie, Hadjidakis; Maria, Haiduc; Hideki, Hamagaki; Gergoe, Hamar; Byounghee, Han; Luke David, Hanratty; Alexander, Hansen; Zuzana, Harmanova; John William, Harris; Matthias, Hartig; Dumitru, Hasegan; Despoina, Hatzifotiadou; Arsen, Hayrapetyan; Stefan Thomas, Heckel; Markus Ansgar, Heide; Haavard, Helstrup; Andrei Ionut, Herghelegiu; Gerardo Antonio Herrera, Corral; Norbert, Herrmann; Benjamin Andreas, Hess; Kristin Fanebust, Hetland; Bernard, Hicks; Per Thomas, Hille; Boris, Hippolyte; Takuma, Horaguchi; Yasuto, Hori; Peter Zahariev, Hristov; Ivana, Hrivnacova; Meidana, Huang; Thomas, Humanic; Dae Sung, Hwang; Raphaelle, Ichou; Radiy, Ilkaev; Iryna, Ilkiv; Motoi, Inaba; Elisa, Incani; Gian Michele, Innocenti; Pier Giorgio, Innocenti; Mikhail, Ippolitov; Muhammad, Irfan; Cristian George, Ivan; Vladimir, Ivanov; Marian, Ivanov; Andrey, Ivanov; Oleksii, Ivanytskyi; Adam Wlodzimierz, Jacholkowski; Peter, Jacobs; Haeng Jin, Jang; Swensy Gwladys, Jangal; Malgorzata Anna, Janik; Rudolf, Janik; Sandun, Jayarathna; Satyajit, Jena; Deeptanshu Manu, Jha; Raul Tonatiuh Jimenez, Bustamante; Lennart, Jirden; Peter Graham, Jones; Hyung Taik, Jung; Anton, Jusko; Alexei, Kaidalov; Vanik, Kakoyan; Sebastian, Kalcher; Peter, Kalinak; Tuomo Esa Aukusti, Kalliokoski; Alexander Philipp, Kalweit; Kalliopi, Kanaki; Ju Hwan, Kang; Vladimir, Kaplin; Ayben Karasu, Uysal; Oleg, Karavichev; Tatiana, Karavicheva; Evgeny, Karpechev; Andrey, Kazantsev; Udo Wolfgang, Kebschull; Ralf, Keidel; Palash, Khan; Mohisin Mohammed, Khan; Shuaib Ahmad, Khan; Alexei, Khanzadeev; Yury, Kharlov; Bjarte, Kileng; Do Won, Kim; Mimae, Kim; Minwoo, Kim; Seon Hee, Kim; Dong Jo, Kim; Se Yong, Kim; Jonghyun, Kim; Jin Sook, Kim; Beomkyu, Kim; Taesoo, Kim; Stefan, Kirsch; Ivan, Kisel; Sergey, Kiselev; Adam Ryszard, Kisiel; Jennifer Lynn, Klay; Jochen, Klein; Christian Klein, Bosing; Michael, Kliemant; Alexander, Kluge; Michael Linus, Knichel; Anders Garritt, Knospe; Kathrin, Koch; Markus, Kohler; Anatoly, Kolojvari; Valery, Kondratiev; Natalia, Kondratyeva; Artem, Konevskih; Andrey, Korneev; Ravjeet, Kour; Marek, Kowalski; Serge, Kox; Greeshma Koyithatta, Meethaleveedu; Jiri, Kral; Ivan, Kralik; Frederick, Kramer; Ingrid Christine, Kraus; Tobias, Krawutschke; Michal, Krelina; Matthias, Kretz; Marian, Krivda; Filip, Krizek; Miroslav, Krus; Evgeny, Kryshen; Mikolaj, Krzewicki; Yury, Kucheriaev; Christian Claude, Kuhn; Paul, Kuijer; Igor, Kulakov; Jitendra, Kumar; Podist, Kurashvili; A. 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Krzysztof, Redlich; Patrick, Reichelt; Martijn, Reicher; Rainer Arno Ernst, Renfordt; Anna Rita, Reolon; Andrey, Reshetin; Felix Vincenz, Rettig; Jean Pierre, Revol; Klaus Johannes, Reygers; Lodovico, Riccati; Renato Angelo, Ricci; Tuva, Richert; Matthias Rudolph, Richter; Petra, Riedler; Werner, Riegler; Francesco, Riggi; Bartolomeu Rodrigues Fernandes, Rabacal; Mario Rodriguez, Cahuantzi; Alis Rodriguez, Manso; Ketil, Roed; David, Rohr; Dieter, Rohrich; Rosa, Romita; Federico, Ronchetti; Philippe, Rosnet; Stefan, Rossegger; Andrea, Rossi; Christelle Sophie, Roy; Pradip Kumar, Roy; Antonio Juan Rubio, Montero; Rui, Rinaldo; Evgeny, Ryabinkin; Andrzej, Rybicki; Sergey, Sadovsky; Karel, Safarik; Raghunath, Sahoo; Pradip Kumar, Sahu; Jogender, Saini; Hiroaki, Sakaguchi; Shingo, Sakai; Dosatsu, Sakata; Carlos Albert, Salgado; Jai, Salzwedel; Sanjeev Singh, Sambyal; Vladimir, Samsonov; Xitzel Sanchez, Castro; Ladislav, Sandor; Andres, Sandoval; Satoshi, Sano; Masato, Sano; Rainer, Santo; Romualdo, Santoro; Juho Jaako, Sarkamo; Eugenio, Scapparone; Fernando, Scarlassara; Rolf Paul, Scharenberg; Claudiu Cornel, Schiaua; Rainer Martin, Schicker; Christian Joachim, Schmidt; Hans Rudolf, Schmidt; Steffen, Schreiner; Simone, Schuchmann; Jurgen, Schukraft; Yves Roland, Schutz; Kilian Eberhard, Schwarz; Kai Oliver, Schweda; Gilda, Scioli; Enrico, Scomparin; Rebecca, Scott; Patrick Aaron, Scott; Gianfranco, Segato; Ilya, Selioujenkov; Serhiy, Senyukov; Jeewon, Seo; Sergio, Serci; Eulogio, Serradilla; Adrian, Sevcenco; Alexandre, Shabetai; Galina, Shabratova; Ruben, Shahoyan; Natasha, Sharma; Satish, Sharma; Rohini, Sharma; Kenta, Shigaki; Maya, Shimomura; Katherin, Shtejer; Yury, Sibiriak; Melinda, Siciliano; Eva, Sicking; Sabyasachi, Siddhanta; Teodor, Siemiarczuk; David Olle Rickard, Silvermyr; Catherine, Silvestre; Goran, Simatovic; Giuseppe, Simonetti; Rama Narayana, Singaraju; Ranbir, Singh; Subhash, Singha; Vikas, Singhal; Tinku, Sinha; Bikash, Sinha; Branislav, Sitar; Mario, Sitta; Bernhard, Skaali; Kyrre, Skjerdal; Radek, Smakal; Nikolai, Smirnov; Raimond, Snellings; Carsten, Sogaard; Ron Ariel, Soltz; Hyungsuk, Son; Myunggeun, Song; Jihye, Song; Csaba, Soos; Francesca, Soramel; Iwona, Sputowska; Martha Spyropoulou, Stassinaki; Brijesh Kumar, Srivastava; Johanna, Stachel; Ionel, Stan; Ionel, Stan; Grzegorz, Stefanek; Timm Morten, Steinbeck; Matthew, Steinpreis; Evert Anders, Stenlund; Gideon Francois, Steyn; Johannes Hendrik, Stiller; Diego, Stocco; Mikhail, Stolpovskiy; Kirill, Strabykin; Peter, Strmen; Alexandre Alarcon Passo, Suaide; Martin Alfonso Subieta, Vasquez; Toru, Sugitate; Christophe Pierre, Suire; Mikhail, Sukhorukov; Rishat, Sultanov; Michal, Sumbera; Tatjana, Susa; Alejandro Szanto, Toledo; Imrich, Szarka; Adam, Szczepankiewicz; Artur Krzysztof, Szostak; Maciej, Szymanski; Jun, Takahashi; Daniel Jesus Tapia, Takaki; Arturo, Tauro; Guillermo Tejeda, Munoz; Adriana, Telesca; Cristina, Terrevoli; Jochen Mathias, Thader; Deepa, Thomas; Raphael Noel, Tieulent; Anthony, Timmins; David, Tlusty; Alberica, Toia; Hisayuki, Torii; Luca, Toscano; David Christopher, Truesdale; Wladyslaw Henryk, Trzaska; Tomoya, Tsuji; Alexandr, Tumkin; Rosario, Turrisi; Trine Spedstad, Tveter; Jason Glyndwr, Ulery; Kjetil, Ullaland; Jochen, Ulrich; Antonio, Uras; Jozef, Urban; Guido Marie, Urciuoli; Gianluca, Usai; Michal, Vajzer; Martin, Vala; Lizardo Valencia, Palomo; Sara, Vallero; Naomi, Kolk; Pierre Vande, Vyvre; Marco, Leeuwen; Luigi, Vannucci; Aurora Diozcora, Vargas; Raghava, Varma; Maria, Vasileiou; Andrey, Vasiliev; Vladimir, Vechernin; Misha, Veldhoen; Venaruzzo, Massimo; Ermanno, Vercellin; Sergio, Vergara; Renaud, Vernet; Marta, Verweij; Linda, Vickovic; Giuseppe, Viesti; Oleg, Vikhlyantsev; Zabulon, Vilakazi; Orlando Villalobos, Baillie; Alexander, Vinogradov; Leonid, Vinogradov; Yury, Vinogradov; Tiziano, Virgili; Yogendra, Viyogi; Alexander, Vodopianov; Kirill, Voloshin; Sergey, Voloshin; Giacomo, Volpe; Barthelemy, Haller; Danilo, Vranic; Gaute, Vrebekk; Janka, Vrlakova; Bogdan, Vulpescu; Alexey, Vyushin; Vladimir, Wagner; Boris, Wagner; Renzhuo, Wan; Mengliang, Wang; Dong, Wang; Yifei, Wang; Yaping, Wang; Kengo, Watanabe; Michael, Weber; Johannes, Wessels; Uwe, Westerhoff; Jens, Wiechula; Jon, Wikne; Martin Rudolf, Wilde; Grzegorz Andrzej, Wilk; Alexander, Wilk; Crispin, Williams; Bernd Stefan, Windelband; Leonidas Xaplanteris, Karampatsos; Chris G., Yaldo; Yorito, Yamaguchi; Hongyan, Yang; Shiming, Yang; Stanislav, Yasnopolsky; Jungyu, Yi; Zhongbao, Yin; In Kwon, Yoo; Jongik, Yoon; Weilin, Yu; Xianbao, Yuan; Igor, Yushmanov; Cenek, Zach; Chiara, Zampolli; Sergey, Zaporozhets; Andrey, Zarochentsev; Petr, Zavada; Nikolai, Zaviyalov; Hanna Paulina, Zbroszczyk; Pierre, Zelnicek; Sorin Ion, Zgura; Mikhail, Zhalov; Xiaoming, Zhang; Haitao, Zhang; Fengchu, Zhou; Daicui, Zhou; You, Zhou; Jianhui, Zhu; Jianlin, Zhu; Xiangrong, Zhu; Antonino, Zichichi; Alice, Zimmermann; Gennady, Zinovjev; Yannick Denis, Zoccarato; Mykhaylo, Zynovyev; Maksym, Zyzak. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - ELETTRONICO. - 2012:(2012), pp. 0-30. [10.1007/JHEP11(2012)065]
Measurement of prompt J/ψ and beauty hadron production cross sections at mid-rapidity in pp collisions at √s=7 TeV
BREGANT, MARCO;CAMERINI, Paolo;CONTIN, GIACOMO;FRAGIACOMO, ENRICO;GROSSO, Raffaele;LEA, RAMONA;MARGAGLIOTTI, GIACOMO;PIANO, STEFANO;RUI, RINALDO;VENARUZZO, MASSIMO;
2012-01-01
Abstract
The ALICE experiment at the LHC has studied J/ψ production at midrapidity in pp collisions at √s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity Lint = 5.6 nb−1. The fraction of J/ψ from the decay of long-lived beauty hadrons was determined for J/ψ candidates with transverse momentum pt > 1.3GeV/c and rapidity |y| < 0.9. The cross section for prompt J/ψ mesons, i.e. directly produced J/ψ and prompt decays of heavier charmonium states such as the ψ(2S) and χc resonances, is σprompt J/ψ (pt > 1.3 GeV/c, |y| < 0.9) = 8.3±0.8 (stat.) ± 1.1 (syst.) +1.5 −1.4 (syst. pol.) μb. The cross section for the production of b-hadrons decaying to J/ψ with pt > 1.3GeV/c and |y| < 0.9 is σJ/ψ←hB (pt > 1.3 GeV/c, |y| < 0.9) = 1.46 ± 0.38 (stat.) +0.26 −0.32 (syst.) μb. The results are compared to QCD model predictions. The shape of the pt and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the bb pair total cross section and dσ/dy at mid-rapidity.Pubblicazioni consigliate
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