Measurement of prompt J/ψ and beauty hadron production cross sections at mid-rapidity in pp collisions at $ \sqrt{s}=7 $ TeV
Authors:   The ALICE Collaboration, Abelev Betty , Adam Jaroslav , Adamova Dagmar , Adare Andrew Marshall , Aggarwal Madan , Rinella Gianluca Aglieri , Agocs Andras Gabor , Agostinelli Andrea , Salazar Saul Aguilar , Ahammed Zubayer , Ahmad Arshad , Ahmad Nazeer , Ahn Sul-Ah , Ahn Sang Un , Akindinov Alexander , Aleksandrov Dmitry , Alessandro Bruno , Molina Jose Ruben Alfaro , Alici Andrea , Alkin Anton , Avina Erick Jonathan Almaraz , 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 , Ferroli Rinaldo Baldini , Baldisseri Alberto , Baldit Alain , Dos Santos Pedrosa Fernando Baltasar , 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 , 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 , Berzano Dario , Betev Latchezar , Bhasin Anju , Bhati Ashok Kumar , Bhom Jihyun , Bianchi Livio , Bianchi Nicola , Bianchin Chiara , Bielcik Jaroslav , Bielcikova Jana , Bilandzic Ante , Bjelogrlic Sandro , Blanco F. , Blanco Francesco , Blau Dmitry , Blume Christoph , Boccioli Marco , Bock Nicolas , Boettger Stefan , Bogdanov Alexey , Boggild Hans , Bogolyubsky Mikhail , Boldizsar Laszlo , Bombara Marek , Book Julian , Borel Herve , Borissov Alexander , Bose Suvendu Nath , Bossu Francesco , Botje Michiel , Boyer Bruno Alexandre , Braidot Ermes , Braun-Munzinger Peter , Bregant Marco , Breitner Timo Gunther , Browning Tyler Allen , Broz Michal , Brun Rene , Bruna Elena , Bruno Giuseppe Eugenio , Budnikov Dmitry , Buesching Henner , Bufalino Stefania , Bugaiev Kyrylo , Busch Oliver , Buthelezi Edith Zinhle , Orduna Diego Caballero , Caffarri Davide , Cai Xu , Caines Helen Louise , Villar Ernesto Calvo , Camerini Paolo , Roman Veronica Canoa , Romeo Giovanni Cara , Carena Francesco , Carena Wisla , Filho Nelson Carlin , Carminati Federico , Montoya Camilo Andres Carrillo , Diaz Amaya Ofelia Casanova , Castellanos Javier Ernesto Castillo , Hernandez Juan Francisco Castillo , Casula Ester Anna Rita , Catanescu Vasile , Cavicchioli Costanza , Sanchez Cesar Ceballos , Cepila Jan , Cerello Piergiorgio , Chang Beomsu , Chapeland Sylvain , Charvet Jean-Luc Fernand , Chattopadhyay Subhasis , Chattopadhyay Sukalyan , Chawla Isha , Cherney Michael Gerard , Cheshkov Cvetan , Cheynis Brigitte , Barroso Vasco Miguel Chibante , 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 , Coccetti Fabrizio , Colamaria Fabio , Colella Domenico , Balbastre Gustavo Conesa , del Valle Zaida Conesa , Constantin Paul , Contin Giacomo , Contreras Jesus Guillermo , Cormier Thomas Michael , Morales Yasser Corrales , Cortese Pietro , Maldonado Ismael Cortes , Cosentino Mauro Rogerio , Costa Filippo , Cotallo Manuel Enrique , Crescio Elisabetta , Crochet Philippe , Alaniz Emilia Cruz , Cuautle Eleazar , Cunqueiro Leticia , Dainese Andrea , Dalsgaard Hans Hjersing , Danu Andrea , Das Debasish , Das Indranil , Das Kushal , Dash Sadhana , Dash Ajay Kumar , De Sudipan , de Barros Gabriel , De Caro Annalisa , de Cataldo Giacinto , de Cuveland Jan , De Falco Alessandro , De Gruttola Daniele , Delagrange Hugues , Deloff Andrzej , Demanov Vyacheslav , De Marco Nora , Denes Ervin , De Pasquale Salvatore , Deppman Airton , D’Erasmo Ginevra , de Rooij Raoul Stefan , Corchero Miguel Angel Diaz , Di Bari Domenico , Di Giglio Carmelo , Dietel Thomas , Di Liberto Sergio , Di Mauro Antonio , Di Nezza Pasquale , Divia Roberto , Djuvsland Oeystein , Dobrin Alexandru Florin , Dobrowolski Tadeusz Antoni , Dominguez Isabel , Donigus Benjamin , Dordic Olja , Driga Olga , Dubey Anand Kumar , Ducroux Laurent , Dupieux Pascal , Majumdar Mihir Ranjan Dutta , Majumdar A. K. Dutta , Elia Domenico , Emschermann David Philip , Engel Heiko , Erdal Hege Austrheim , Espagnon Bruno , Estienne Magali Danielle , Esumi Shinichi , Evans David , Eyyubova Gyulnara , Fabris Daniela , Faivre Julien , Falchieri Davide , Fantoni Alessandra , Fasel Markus , Fearick Roger Worsley , Fedunov Anatoly , Fehlker Dominik , Feldkamp Linus , Felea Daniel , Fenton-Olsen Bo , Feofilov Grigory , Tellez Arturo Fernandez , Ferretti Alessandro , Ferretti Roberta , Figiel Jan , Figueredo Marcel , Filchagin Sergey , Finogeev Dmitry , Fionda Fiorella , Fiore Enrichetta Maria , Floris Michele , Foertsch Siegfried Valentin , Foka Panagiota , Fokin Sergey , Fragiacomo Enrico , Frankenfeld Ulrich Michael , Fuchs Ulrich , Furget Christophe , Girard Mario Fusco , Gaardhoje Jens Joergen , Gagliardi Martino , Gago Alberto , Gallio Mauro , Gangadharan Dhevan Raja , Ganoti Paraskevi , Garabatos Jose , Garcia-Solis Edmundo , 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 , Glassel Peter , Gomez Ramon , Gonschior Alexey , Ferreiro Elena Gonzalez , Gonzalez-Trueba Laura Helena , Gonzalez-Zamora Pedro , Gorbunov Sergey , Goswami Ankita , Gotovac Sven , Grabski Varlen , Graczykowski Lukasz Kamil , Grajcarek Robert , Grelli Alessandro , Grigoras Costin , Grigoras Alina Gabriela , Grigoriev Vladislav , Grigoryan Ara , Grigoryan Smbat , Grinyov Boris , Grion Nevio , Gros Philippe , Grosse-Oetringhaus Jan Fiete , Grossiord Jean-Yves , Grosso Raffaele , Guber Fedor , Guernane Rachid , Gutierrez Cesar Guerra , Guerzoni Barbara , Guilbaud Maxime Rene Joseph , Gulbrandsen Kristjan Herlache , Gunji Taku , Gupta Anik , Gupta Ramni , Gutbrod Hans , Haaland Oystein Senneset , Hadjidakis Cynthia Marie , Haiduc Maria , Hamagaki Hideki , Hamar Gergoe , Han Byounghee , Hanratty Luke David , Hansen Alexander , Harmanova Zuzana , Harris John William , Hartig Matthias , Hasegan Dumitru , Hatzifotiadou Despoina , Hayrapetyan Arsen , Heckel Stefan Thomas , Heide Markus Ansgar , Helstrup Haavard , Herghelegiu Andrei Ionut , Corral Gerardo Antonio Herrera , Herrmann Norbert , Hess Benjamin Andreas , Hetland Kristin Fanebust , Hicks Bernard , Hille Per Thomas , Hippolyte Boris , Horaguchi Takuma , 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 Gian Michele , Innocenti Pier Giorgio , Ippolitov Mikhail , Irfan Muhammad , Ivan Cristian George , Ivanov Vladimir , Ivanov Marian , Ivanov Andrey , Ivanytskyi Oleksii , Jacholkowski Adam Wlodzimierz , Jacobs Peter , Jang Haeng Jin , Jangal Swensy Gwladys , Janik Malgorzata Anna , Janik Rudolf , Jayarathna Sandun , Jena Satyajit , Jha Deeptanshu Manu , Bustamante Raul Tonatiuh Jimenez , Jirden Lennart , Jones Peter Graham , Jung Hyung Taik , Jusko Anton , Kaidalov Alexei , Kakoyan Vanik , Kalcher Sebastian , Kalinak Peter , Kalliokoski Tuomo Esa Aukusti , Kalweit Alexander Philipp , Kanaki Kalliopi , Kang Ju Hwan , Kaplin Vladimir , Uysal Ayben Karasu , Karavichev Oleg , Karavicheva Tatiana , Karpechev Evgeny , Kazantsev Andrey , Kebschull Udo Wolfgang , Keidel Ralf , Khan Palash , Khan Mohisin Mohammed , Khan Shuaib Ahmad , Khanzadeev Alexei , Kharlov Yury , Kileng Bjarte , Kim Do Won , Kim Mimae , Kim Minwoo , Kim Seon Hee , Kim Dong Jo , Kim Se Yong , Kim Jonghyun , Kim Jin Sook , Kim Beomkyu , Kim Taesoo , 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 , Koch Kathrin , Kohler Markus , Kolojvari Anatoly , Kondratiev Valery , Kondratyeva Natalia , Konevskih Artem , Korneev Andrey , Kour Ravjeet , Kowalski Marek , Kox Serge , Meethaleveedu Greeshma Koyithatta , Kral Jiri , Kralik Ivan , Kramer Frederick , Kraus Ingrid Christine , Krawutschke Tobias , Krelina Michal , Kretz Matthias , Krivda Marian , Krizek Filip , Krus Miroslav , Kryshen Evgeny , Krzewicki Mikolaj , Kucheriaev Yury , Kuhn Christian Claude , Kuijer Paul , Kulakov Igor , Kumar Jitendra , Kurashvili Podist , Kurepin A. B. , Kurepin A. , Kuryakin Alexey , Kushpil Vasily , Kushpil Svetlana , Kvaerno Henning , Kweon Min Jung , Kwon Youngil , de Guevara Pedro Ladron , Lakomov Igor , Langoy Rune , La Pointe Sarah Louise , Lara Camilo Ernesto , Lardeux Antoine Xavier , La Rocca Paola , Lazzeroni Cristina , Lea Ramona , Le Bornec Yves , Lechman Mateusz , Lee Sung Chul , Lee Ki Sang , Lee Graham Richard , Lefevre Frederic , Lehnert Joerg Walter , Leistam Lars , Lenhardt Matthieu Laurent , Lenti Vito , Leon Hermes , Leoncino Marco , Monzon Ildefonso Leon , Vargas Hermes Leon , Levai Peter , Lien Jorgen , Lietava Roman , Lindal Svein , Lindenstruth Volker , Lippmann Christian , Lisa Michael Annan , Liu Lijiao , Loenne Per-Ivar , Loggins Vera , Loginov Vitaly , Lohn Stefan Bernhard , Lohner Daniel , Loizides Constantinos , Loo Kai Krister , Lopez Xavier Bernard , Torres Ernesto Lopez , Lovhoiden Gunnar , Lu Xianguo , Luettig Philipp , Lunardon Marcello , Luo Jiebin , Luparello Grazia , Luquin Lionel , Luzzi Cinzia , Ma Rongrong , Ma Ke , Madagodahettige-Don Dilan Minthaka , Maevskaya Alla , Mager Magnus , Mahapatra Durga Prasad , Maire Antonin , Malaev Mikhail , Cervantes Ivonne Alicia Maldonado , 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 , Tobon Cesar Augusto Marin , Markert Christina , Martashvili Irakli , Martinengo Paolo , Martinez Mario Ivan , Davalos Arnulfo Martinez , Garcia Gines Martinez , Martynov Yevgen , Mas Alexis Jean-Michel , Masciocchi Silvia , Masera Massimo , Masoni Alberto , Massacrier Laure Marie , Mastromarco Mario , Mastroserio Annalisa , Matthews Zoe Louise , Matyja Adam Tomasz , Mayani Daniel , Mayer Christoph , Mazer Joel , Mazzoni Alessandra Maria , Meddi Franco , Menchaca-Rocha Arturo Alejandro , Perez Jorge Mercado , Meres Michal , Miake Yasuo , Milano Leonardo , Milosevic Jovan , Mischke Andre , Mishra Aditya Nath , Miskowiec Dariusz , Mitu Ciprian Mihai , Mlynarz Jocelyn , Mohanty Bedangadas , Mohanty Ajit Kumar , Molnar Levente , Zetina Luis Manuel Montano , Monteno Marco , Montes Esther , Moon Taebong , Morando Maurizio , De Godoy Denise Aparecida Moreira , Moretto Sandra , Morsch Andreas , Muccifora Valeria , Mudnic Eugen , Muhuri Sanjib , Mukherjee Maitreyee , Muller Hans , Munhoz Marcelo , Musa Luciano , Musso Alfredo , Nandi Basanta Kumar , Nania Rosario , Nappi Eugenio , Nattrass Christine , Naumov Nikolay , Navin Sparsh , Nayak Tapan Kumar , Nazarenko Sergey , Nazarov Gleb , 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 , Novitzky Norbert , Nyanin Alexandre , Nyatha 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Terrevoli Cristina , Thader Jochen Mathias , Thomas Deepa , Tieulent Raphael Noel , Timmins Anthony , Tlusty David , Toia Alberica , Torii Hisayuki , Toscano Luca , Truesdale David Christopher , Trzaska Wladyslaw Henryk , Tsuji Tomoya , Tumkin Alexandr , Turrisi Rosario , Tveter Trine Spedstad , Ulery Jason Glyndwr , Ullaland Kjetil , Ulrich Jochen , Uras Antonio , Urban Jozef , Urciuoli Guido Marie , Usai Gianluca , Vajzer Michal , Vala Martin , Palomo Lizardo Valencia , Vallero Sara , van der Kolk Naomi , Vyvre Pierre Vande , van Leeuwen Marco , Vannucci Luigi , Vargas Aurora Diozcora , Varma Raghava , Vasileiou Maria , Vasiliev Andrey , Vechernin Vladimir , Veldhoen Misha , Venaruzzo Massimo , Vercellin Ermanno , Vergara Sergio , Vernet Renaud , Verweij Marta , Vickovic Linda , Viesti Giuseppe , Vikhlyantsev Oleg , Vilakazi Zabulon , Baillie Orlando Villalobos , Vinogradov Alexander , Vinogradov Leonid , Vinogradov Yury , Virgili Tiziano , Viyogi Yogendra , Vodopianov Alexander , Voloshin Kirill , Voloshin Sergey , Volpe Giacomo , von Haller Barthelemy , Vranic Danilo , vrebekk Gaute , Vrlakova Janka , Vulpescu Bogdan , Vyushin Alexey , Wagner Vladimir , Wagner Boris , Wan Renzhuo , Wang Mengliang , Wang Dong , Wang Yifei , Wang Yaping , Watanabe Kengo , Weber Michael , Wessels Johannes , Westerhoff Uwe , Wiechula Jens , Wikne Jon , Wilde Martin Rudolf , Wilk Grzegorz Andrzej , Wilk Alexander , Williams Crispin , Windelband Bernd Stefan , Karampatsos Leonidas Xaplanteris , Yaldo Chris G , Yamaguchi Yorito , Yang Hongyan , Yang Shiming , Yasnopolsky Stanislav , Yi JunGyu , Yin Zhongbao , Yoo In-Kwon , Yoon Jongik , Yu Weilin , Yuan Xianbao , Yushmanov Igor , Zach Cenek , Zampolli Chiara , Zaporozhets Sergey , Zarochentsev Andrey , Zavada Petr , Zaviyalov Nikolai , Zbroszczyk Hanna Paulina , Zelnicek Pierre , Zgura Sorin Ion , Zhalov Mikhail , Zhang Xiaoming , Zhang Haitao , Zhou Fengchu , Zhou Daicui , Zhou You , Zhu Jianhui , Zhu Jianlin , Zhu Xiangrong , Zichichi Antonino , Zimmermann Alice , Zinovjev Gennady , Zoccarato Yannick Denis , Zynovyev Mykhaylo , Zyzak Maksym 
Published: November 2012

AbstractThe ALICE experiment at the LHC has studied J/ψproduction at mid-rapidity in pp collisions at$ \sqrt{s}=7 $TeV through its electron pair decay on a data sample corresponding to an integrated luminosityLint= 5.6 nb−1. The fraction of J/ψfrom the decay of long-lived beauty hadrons was determined for J/ψcandidates with transverse momentumpt>1.3 GeV/cand rapidity |y|<0.9. The cross section for prompt J/ψmesons, i.e. directly produced J/ψand prompt decays of heavier charmonium states such as theψ(2S) and χcresonances, is σprompt J/ψ(pt>1.3 GeV/c,|y|<0.9) = 8.3 ± 0.8 (stat.) ± 1.1 (syst.)$ _{-1.4}^{+1.5 } $(syst.pol.)μb. The cross section for the production of b-hadrons decaying to J/ψwithpt>1.3 GeV/cand |y|<0.9 is$ {\sigma_{{{J \left/ {{\psi \leftarrow {{\mathrm{h}}_{\mathrm{B}}}}} \right.}}}} $(pt> 1.3 GeV/c, |y| < 0.9) = 1.46 ± 0.38 (stat.)$ _{-0.32}^{+0.26 } $(syst.)μb. The results are compared to QCD model predictions. The shape of theptandydistributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the$ \mathrm{b}\overline{\mathrm{b}} $pair total cross section and dσ/dyat mid-rapidity.