Article

Two-pion Bose-Einstein correlations in pp collisions at sqrt(s)=900 GeV

K. Aamodt, N. Abel, U. Abeysekara, A. Abrahantes Quintana, A. Abramyan, D. Adamova, M. M. Aggarwal, G. Aglieri Rinella, A. G. Agocs, S. Aguilar Salazar, Z. Ahammed, A Ahmad, N Ahmad, S. U. Ahn, R Akimoto, A. Akindinov, D. Aleksandrov, B Alessandro, R. Alfaro Molina, A. Alici, E. Almaraz Avina, J. Alme, T. Alt, V. Altini, S. Altinpinar, C. Andrei, A. Andronic, G. Anelli, V. Angelov, C. Anson, T. Anticic, F. Antinori, S. Antinori, K. Antipin, D. Antonczyk, P. Antonioli, A. Anzo, L Aphecetche, H. Appelshauser, S Arcelli, R. Arceo, A. Arend, N. Armesto, R. Arnaldi, T. Aronsson, I. C. Arsene, A. Asryan, A Augustinus, R Averbeck, T C Awes, J. Aysto, M. D. Azmi, S. Bablok, M Bach, A. Badala, Y. W. Baek, S Bagnasco, R. Bailhache, R. Bala, A. Baldisseri, A. Baldit, J Ban, R. Barbera, G. G. Barnafoldi, L. S. Barnby, V. Barret, J. Bartke, F. Barile, M Basile, V. Basmanov, N. Bastid, B. Bathen, G. Batigne, B Batyunya, C. Baumann, I G Bearden, B Becker, I. Belikov, R. Bellwied, E. Belmont-Moreno, A Belogianni, L. Benhabib, S. Beole, I. Berceanu, A. Bercuci, E. Berdermann, Y Berdnikov, L Betev, A. Bhasin, A. K. Bhati, L Bianchi, N. Bianchi, C. Bianchin, J. Bielcik, J. Bielcikova, A. Bilandzic, L. Bimbot, E. Biolcati, A. Blanc, F. Blanco, D. Blau, C Blume, M. Boccioli, N. Bock, A. Bogdanov, H Boggild, M. Bogolyubsky, J Bohm, L. Boldizsar, M. Bombara, C. Bombonati, M. Bondila, H. Borel, A. Borisov, C. Bortolin, S Bose, L Bosisio, F. Bossu, M Botje, S. Bottger, G. Bourdaud, B. Boyer, M Braun, P. Braun-Munzinger, L. Bravina, M. Bregant, T. Breitner, G. Bruckner, R Brun, E. Bruna, G. E. Bruno, D. Budnikov, H Buesching, P Buncic, O. Busch, Z. Buthelezi, D. Caffarri, X Cai, H. Caines, E Calvo, E. Camacho, P. Camerini, M Campbell, V. Canoa Roman, G.P. Capitani, G Cara Romeo, F Carena, W. Carena, F Carminati, A. Casanova Diaz, M. Caselle, J. Castillo Castellanos, J. F. Castillo Hernandez, V. Catanescu, E. Cattaruzza, C. Cavicchioli, P. Cerello, V. Chambert, B Chang, S. Chapeland, A. Charpy, J. L. Charvet, S Chattopadhyay, M Cherney, C Cheshkov, B. Cheynis, E. Chiavassa, V. Chibante Barroso, D. D. Chinellato, P Chochula, K Choi, M. Chojnacki, P. Christakoglou, C H Christensen, P. Christiansen, T Chujo, F. Chuman, C. Cicalo, L. Cifarelli, F Cindolo, J. Cleymans, O. Cobanoglu, J. P. Coffin, S. Coli, A. Colla, G. Conesa Balbastre, Z. Conesa del Valle, E. S. Conner, P Constantin, G. Contin, J G Contreras, Y. Corrales Morales, T. M. Cormier, P. Cortese, I. Cortes Maldonado, M. R. Cosentino, F Costa, M. E. Cotallo, E. Crescio, P. Crochet, E. Cuautle, L. Cunqueiro, J. Cussonneau, A. Dainese, H. H. Dalsgaard, A. Danu, I Das, A. Dash, S Dash, G. O. V. de Barros, A. De Caro, G De Cataldo, J. de Cuveland, A De Falco, M. De Gaspari, J. de Groot, D. De Gruttola, N De Marco, S De Pasquale, R. De Remigis, R. de Rooij, G. de Vaux, H Delagrange, Y. Delgado, G. Dellacasa, A. Deloff, V. Demanov, E. Denes, A. Deppman, G. D'Erasmo, D. Derkach, A. Devaux, D Di Bari, C. Di Giglio, S Di Liberto, A. Di Mauro, P Di Nezza, M. Dialinas, L. Diaz, R Diaz, T. Dietel, R. Divia, O. Djuvsland, V. Dobretsov, A. Dobrin, T. Dobrowolski, B. Donigus, I. Dominguez, D. M. M. Don, O. Dordic, A. K. Dubey, J. Dubuisson, L. Ducroux, P. Dupieux, A. K. Dutta Majumdar, M R Dutta Majumdar, D. Elia, D. Emschermann, A Enokizono, B Espagnon, M. Estienne, S Esumi, D Evans, S Evrard, G. Eyyubova, C W Fabjan, D. Fabris, J Faivre, D. Falchieri, A Fantoni, M. Fasel, O. Fateev, R. Fearick, A. Fedunov, D. Fehlker, V. Fekete, D. Felea, B. Fenton-Olsen, G. Feofilov, A. Fernandez Tellez, E. G. Ferreiro, A Ferretti, R. Ferretti, M. A. S. Figueredo, S. Filchagin, R. Fini, F. M. Fionda, E. M. Fiore, M. Floris, Z Fodor, S. Foertsch, P Foka, S. Fokin, F Formenti, E. Fragiacomo, M. Fragkiadakis, U. Frankenfeld, A Frolov, U. Fuchs, F. Furano, C. Furget, M. Fusco Girard, J. J. Gaardhoje, S. Gadrat, M. Gagliardi, A. Gago, M. Gallio, P. Ganoti, M. S. Ganti, C Garabatos, C. Garcia Trapaga, J. Gebelein, R. Gemme, M. Germain, A. Gheata, M. Gheata, B Ghidini, P Ghosh, G. Giraudo, P Giubellino, E Gladysz-Dziadus, R Glasow, P. Glassel, A Glenn, R. Gomez Jimenez, H. Gonzalez Santos, L. H. Gonzalez-Trueba, P. Gonzalez-Zamora, S. Gorbunov, Y. Gorbunov, S. Gotovac, H. Gottschlag, V. Grabski, R. Grajcarek, A. Grelli, A. Grigoras, C. Grigoras, V. Grigoriev, A. Grigoryan, S. Grigoryan, B. Grinyov, N. Grion, P Gros, J. F. Grosse-Oetringhaus, J Y Grossiord, R. Grosso, F. Guber, R. Guernane, C Guerra, B. Guerzoni, K. Gulbrandsen, H. Gulkanyan, T Gunji, A Gupta, R Gupta, H-A Gustafsson, H. Gutbrod, O. Haaland, C Hadjidakis, M. Haiduc, H Hamagaki, G. Hamar, J. Hamblen, B H Han, J W Harris, M. Hartig, A. Harutyunyan, D. Hasch, D. Hasegan, D Hatzifotiadou, A. Hayrapetyan, M. Heide, M. Heinz, H. Helstrup, A. Herghelegiu, C. Hernandez, G. Herrera Corral, N. Herrmann, K. F. Hetland, B. Hicks, A. Hiei, P. T. Hille, B. Hippolyte, T. Horaguchi, Y Hori, P Hristov, I. Hrivnacova, S Hu, M Huang, S Huber, T. J. Humanic, D. Hutter, D S Hwang, R. Ichou, R. Ilkaev, I. Ilkiv, M Inaba, P. G. Innocenti, M. Ippolitov, M. Irfan, C. Ivan, A Ivanov, M. Ivanov, V. Ivanov, T Iwasaki, A Jacholkowski, P Jacobs, L. Jancurova, S. Jangal, R Janik, C. Jena, S. Jena, L. Jirden, G T Jones, P. G. Jones, P Jovanovic, H Jung, W Jung, A. Jusko, A. B. Kaidalov, S. Kalcher, P. Kalinak, M. Kalisky, T. Kalliokoski, A. Kalweit, A. Kamal, R. Kamermans, K. Kanaki, E Kang, J H Kang, J. Kapitan, V. Kaplin, S. Kapusta, O. Karavichev, T. Karavicheva, E. Karpechev, A. Kazantsev, U. Kebschull, R. Keidel, M M Khan, S A Khan, A Khanzadeev, Y. Kharlov, D. Kikola, B. Kileng, D J Kim, D S Kim, D W Kim, H N Kim, J Kim, J H Kim, J S Kim, M Kim, S H Kim, S Kim, Y Kim, S Kirsch, I. Kisel, S. Kiselev, A. Kisiel, J. L. Klay, J Klein, C. Klein-Bosing, M. Kliemant, A Klovning, A Kluge, M. L. Knichel, S Kniege, K. Koch, R. Kolevatov, A. Kolojvari, V. Kondratiev, N. Kondratyeva, A. 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Zampolli, Yu. Zanevsky, S. Zaporozhets, A. Zarochentsev, P. Zavada, H. Zbroszczyk, P. Zelnicek, A. Zenin, A. Zepeda, I. Zgura, M. Zhalov, X Zhang, D Zhou, S Zhou, J Zhu, A. Zichichi, A Zinchenko, G. Zinovjev, Y. Zoccarato, V. Zychacek, M. Zynovyev

07/2010; DOI: 10.1103/PhysRevD.82.052001
Source: arXiv

ABSTRACT We report on the measurement of two-pion correlation functions from pp
collisions at sqrt(s)=900 GeV performed by the ALICE experiment at the Large
Hadron Collider. Our analysis shows an increase of the HBT radius with
increasing event multiplicity, in line with other measurements done in
particle- and nuclear collisions. Conversely, the strong decrease of the radius
with increasing transverse momentum, as observed at RHIC and at Tevatron, is
not manifest in our data.

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