@article{3073514,
    title = "J/ψ production as a function of charged particle multiplicity in pp collisions at s=7TeV",
    author = "Abelev, B. and Adam, J. and Adamová, D. and Adare, A.M. and Aggarwal, M.M. and Aglieri Rinella, G. and Agocs, A.G. and Agostinelli, A. and Aguilar Salazar, S. and Ahammed, Z. and Ahmad Masoodi, A. and Ahmad, N. and Ahn, S.U. and Akindinov, A. and Aleksandrov, D. and Alessandro, B. and Alfaro Molina, R. and Alici, A. and Alkin, A. and Almaráz Aviña, E. and Alme, J. and Alt, T. and Altini, V. and Altinpinar, S. and Altsybeev, I. and Andrei, C. and Andronic, A. and Anguelov, V. and Anielski, J. and Anson, C. and Antičić, T. and Antinori, F. and Antonioli, P. and Aphecetche, L. and Appelshäuser, H. and Arbor, N. and Arcelli, S. and Arend, A. and Armesto, N. and Arnaldi, R. and Aronsson, T. and Arsene, I.C. and Arslandok, M. and Asryan, A. and Augustinus, A. and Averbeck, R. and Awes, T.C. and Äystö, J. and Azmi, M.D. and Bach, M. and Badalà, A. and Baek, Y.W. and Bailhache, R. and Bala, R. and Baldini Ferroli, R. and Baldisseri, A. and Baldit, A. and Baltasar Dos Santos Pedrosa, F. and Bán, J. and Baral, R.C. and Barbera, R. and Barile, F. and Barnaföldi, G.G. and Barnby, L.S. and Barret, V. and Bartke, J. and Basile, M. and Bastid, N. and Bathen, B. and Batigne, G. and Batyunya, B. and Baumann, C. and Bearden, I.G. and Beck, H. and Belikov, I. and Bellini, F. and Bellwied, R. and Belmont-Moreno, E. and Bencedi, G. and Beole, S. and Berceanu, I. and Bercuci, A. and Berdnikov, Y. and Berenyi, D. and Bergmann, C. and Berzano, D. and Betev, L. and Bhasin, A. and Bhati, A.K. and Bianchi, N. and Bianchi, L. and Bianchin, C. and Bielčík, J. and Bielčíková, J. and Bilandzic, A. and Bjelogrlic, S. and Blanco, F. and Blanco, F. and Blau, D. and Blume, C. and Boccioli, M. and Bock, N. and Bogdanov, A. and Bøggild, H. and Bogolyubsky, M. and Boldizsár, L. and Bombara, M. and Book, J. and Borel, H. and Borissov, A. and Bose, S. and Bossú, F. and Botje, M. and Böttger, S. and Boyer, B. and Braun-Munzinger, P. and Bregant, M. and Breitner, T. and Browning, T.A. and Broz, M. and Brun, R. and Bruna, E. and Bruno, G.E. and Budnikov, D. and Buesching, H. and Bufalino, S. and Bugaiev, K. and Busch, O. and Buthelezi, Z. and Caballero Orduna, D. and Caffarri, D. and Cai, X. and Caines, H. and Calvo Villar, E. and Camerini, P. and Canoa Roman, V. and Cara Romeo, G. and Carena, F. and Carena, W. and Carlin Filho, N. and Carminati, F. and Carrillo Montoya, C.A. and Casanova Díaz, A. and Castillo Castellanos, J. and Castillo Hernandez, J.F. and Casula, E.A.R. and Catanescu, V. and Cavicchioli, C. and Cepila, J. and Cerello, P. and Chang, B. and Chapeland, S. and Charvet, J.L. and Chattopadhyay, S. and Chattopadhyay, S. and Cherney, M. and Cheshkov, C. and Cheynis, B. and Chiavassa, E. and Chibante Barroso, V. and Chinellato, D.D. and Chochula, P. and Chojnacki, M. and Christakoglou, P. and Christensen, C.H. and Christiansen, P. and Chujo, T. and Chung, S.U. and Cicalo, C. and Cifarelli, L. and Cindolo, F. and Cleymans, J. and Coccetti, F. and Colamaria, F. and Colella, D. and Conesa Balbastre, G. and Conesa del Valle, Z. and Constantin, P. and Contin, G. and Contreras, J.G. and Cormier, T.M. and Corrales Morales, Y. and Cortese, P. and Cortés Maldonado, I. and Cosentino, M.R. and Costa, F. and Cotallo, M.E. and Crescio, E. and Crochet, P. and Cruz Alaniz, E. and Cuautle, E. and Cunqueiro, L. and Dainese, A. and Dalsgaard, H.H. and Danu, A. and Das, I. and Das, K. and Das, D. and Dash, S. and Dash, A. and De, S. and De Azevedo Moregula, A. and de Barros, G.O.V. and De Caro, A. and de Cataldo, G. and de Cuveland, J. and De Falco, A. and De Gruttola, D. and Delagrange, H. and Del Castillo Sanchez, E. and Deloff, A. and Demanov, V. and De Marco, N. and Dénes, E. and De Pasquale, S. and Deppman, A. and Erasmo, G.D. and de Rooij, R. and Di Bari, D. and Dietel, T. and Di Giglio, C. and Di Liberto, S. and Di Mauro, A. and Di Nezza, P. and Divià, R. and Djuvsland, Ø. and Dobrin, A. and Dobrowolski, T. and Domínguez, I. and Dönigus, B. and Dordic, O. and Driga, O. and Dubey, A.K. and Ducroux, L. and Dupieux, P. and Dutta Majumdar, A.K. and Dutta Majumdar, M.R. and Elia, D. and Emschermann, D. and Engel, H. and Erdal, H.A. and Espagnon, B. and Estienne, M. and Esumi, S. and Evans, D. and Eyyubova, G. and Fabris, D. and Faivre, J. and Falchieri, D. and Fantoni, A. and Fasel, M. and Fearick, R. and Fedunov, A. and Fehlker, D. and Feldkamp, L. and Felea, D. and Feofilov, G. and Fernández Téllez, A. and Ferretti, R. and Ferretti, A. and Figiel, J. and Figueredo, M.A.S. and Filchagin, S. and Finogeev, D. and Fionda, F.M. and Fiore, E.M. and Floris, M. and Foertsch, S. and Foka, P. and Fokin, S. and Fragiacomo, E. and Fragkiadakis, M. and Frankenfeld, U. and Fuchs, U. and Furget, C. and Fusco Girard, M. and Gaardhøje, J.J. and Gagliardi, M. and Gago, A. and Gallio, M. and Gangadharan, D.R. and Ganoti, P. and Garabatos, C. and Garcia-Solis, E. and Garishvili, I. and Gerhard, J. and Germain, M. and Geuna, C. and Gheata, A. and Gheata, M. 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    journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
    year = "2012",
    volume = "712",
    number = "3",
    pages = "165-175",
    doi = "10.1016/j.physletb.2012.04.052",
    abstract = "The ALICE Collaboration reports the measurement of the relative J/ψ yield as a function of charged particle pseudorapidity density dNch/dη in pp collisions at s=7TeV at the LHC. J/ψ particles are detected for pt>0, in the rapidity interval |y|<0.9 via decay into e+e-, and in the interval 2.5<y<4.0 via decay into μ+μ- pairs. An approximately linear increase of the J/ψ yields normalized to their event average (dNJ/ψ/dy)/〈 dNJ/ψ/dy〉 with (dNch/dη)/〈 dNch/dη〉 is observed in both rapidity ranges, where dNch/dη is measured within |η|<1 and pt>0. In the highest multiplicity interval with 〈 dNch/dη(bin)〉 =24.1, corresponding to four times the minimum bias multiplicity density, an enhancement relative to the minimum bias J/ψ yield by a factor of about 5 at 2.5<y<4 (8 at |y|<0.9) is observed. © 2012 CERN."
}