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Femtoscopy of pp collisions at root s=0.9 and 7 TeV at the LHC with two-pion Bose-Einstein correlations

Aamodt, K. ; Abrahantes Quintana, A. ; Adamova, D. ; Adare, A. M. ; Aggarwal, M. M. ; Rinella, G. Aglieri ; Agocs, A. G. ; Salazar, S. Aguilar ; Ahammed, Z. and Ahmad, N. , et al. (2011) In Physical Review D (Particles, Fields, Gravitation and Cosmology) 84(11).
Abstract
We report on the high statistics two-pion correlation functions from pp collisions at root s = 0.9 TeV and root s = 7 TeV, measured by the ALICE experiment at the Large Hadron Collider. The correlation functions as well as the extracted source radii scale with event multiplicity and pair momentum. When analyzed in the same multiplicity and pair transverse momentum range, the correlation is similar at the two collision energies. A three-dimensional femtoscopic analysis shows an increase of the emission zone with increasing event multiplicity as well as decreasing homogeneity lengths with increasing transverse momentum. The latter trend gets more pronounced as multiplicity increases. This suggests the development of space-momentum... (More)
We report on the high statistics two-pion correlation functions from pp collisions at root s = 0.9 TeV and root s = 7 TeV, measured by the ALICE experiment at the Large Hadron Collider. The correlation functions as well as the extracted source radii scale with event multiplicity and pair momentum. When analyzed in the same multiplicity and pair transverse momentum range, the correlation is similar at the two collision energies. A three-dimensional femtoscopic analysis shows an increase of the emission zone with increasing event multiplicity as well as decreasing homogeneity lengths with increasing transverse momentum. The latter trend gets more pronounced as multiplicity increases. This suggests the development of space-momentum correlations, at least for collisions producing a high multiplicity of particles. We consider these trends in the context of previous femtoscopic studies in high-energy hadron and heavy-ion collisions and discuss possible underlying physics mechanisms. Detailed analysis of the correlation reveals an exponential shape in the outward and longitudinal directions, while the sideward remains a Gaussian. This is interpreted as a result of a significant contribution of strongly decaying resonances to the emission region shape. Significant nonfemtoscopic correlations are observed, and are argued to be the consequence of "mini-jet"-like structures extending to low p(t). They are well reproduced by the Monte-Carlo generators and seen also in pi(+)pi(-) correlations. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D (Particles, Fields, Gravitation and Cosmology)
volume
84
issue
11
publisher
American Physical Society
external identifiers
  • wos:000298131100001
  • scopus:84855313460
ISSN
1550-2368
DOI
10.1103/PhysRevD.84.112004
language
English
LU publication?
yes
id
dd5e480d-0fed-4a24-9c4e-f1bc2718971c (old id 2319333)
date added to LUP
2016-04-01 10:26:26
date last changed
2023-01-02 04:32:17
@article{dd5e480d-0fed-4a24-9c4e-f1bc2718971c,
  abstract     = {{We report on the high statistics two-pion correlation functions from pp collisions at root s = 0.9 TeV and root s = 7 TeV, measured by the ALICE experiment at the Large Hadron Collider. The correlation functions as well as the extracted source radii scale with event multiplicity and pair momentum. When analyzed in the same multiplicity and pair transverse momentum range, the correlation is similar at the two collision energies. A three-dimensional femtoscopic analysis shows an increase of the emission zone with increasing event multiplicity as well as decreasing homogeneity lengths with increasing transverse momentum. The latter trend gets more pronounced as multiplicity increases. This suggests the development of space-momentum correlations, at least for collisions producing a high multiplicity of particles. We consider these trends in the context of previous femtoscopic studies in high-energy hadron and heavy-ion collisions and discuss possible underlying physics mechanisms. Detailed analysis of the correlation reveals an exponential shape in the outward and longitudinal directions, while the sideward remains a Gaussian. This is interpreted as a result of a significant contribution of strongly decaying resonances to the emission region shape. Significant nonfemtoscopic correlations are observed, and are argued to be the consequence of "mini-jet"-like structures extending to low p(t). They are well reproduced by the Monte-Carlo generators and seen also in pi(+)pi(-) correlations.}},
  author       = {{Aamodt, K. and Abrahantes Quintana, A. and Adamova, D. and Adare, A. M. and Aggarwal, M. M. and Rinella, G. Aglieri and Agocs, A. G. and Salazar, S. Aguilar and Ahammed, Z. and Ahmad, N. and Masoodi, A. Ahmad and Ahn, S. U. and Akindinov, A. and Aleksandrov, D. and Alessandro, B. and Alfaro Molina, R. and Alici, A. and Alkin, A. and Almaraz Avina, E. and Alt, T. and Altini, V. and Altinpinar, S. and Altsybeev, I. and Andrei, C. and Andronic, A. and Anguelov, V. and Anson, C. and Anticic, T. and Antinori, F. and Antonioli, P. and Aphecetche, L. and Appelshaeuser, H. and Arbor, N. and Arcelli, S. and Arend, A. and Armesto, N. and Arnaldi, R. and Aronsson, T. and Arsene, I. C. and Asryan, A. and Augustinus, A. and Averbeck, R. and Awes, T. C. and Aysto, J. and Azmi, M. D. and Bach, M. and Badala, A. and Baek, Y. W. and Bagnasco, S. and Bailhache, R. and Bala, R. and Ferroli, R. Baldini and Baldisseri, A. and Baldit, A. and Ban, J. and Barbera, R. and Barile, F. and Barnafoeldi, 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 Beole, S. and Berceanu, I. and Bercuci, A. and Berdermann, E. and Berdnikov, Y. and Betev, L. and Bhasin, A. and Bhati, A. K. and Bianchi, L. and Bianchi, N. and Bianchin, C. and Bielcik, J. and Bielcikova, J. and Bilandzic, A. and Biolcati, E. and Blanc, A. and Blanco, F. and Blanco, F. and Blau, D. and Blume, C. and Boccioli, M. and Bock, N. and Bogdanov, A. and Boggild, H. and Bogolyubsky, M. and Boldizsar, L. and Bombara, M. and Bombonati, C. and Book, J. and Borel, H. and Bortolin, C. and Bose, S. and Bossu, F. and Botje, M. and Boettger, S. and Boyer, B. and Braun-Munzinger, P. and Bravina, L. and Bregant, M. and Breitner, T. and Broz, M. and Brun, R. and Bruna, E. and Bruno, G. E. and Budnikov, D. and Buesching, H. and Busch, O. and Buthelezi, Z. 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 Carminati, F. and Diaz, A. Casanova and Caselle, M. and Castellanos, J. Castillo and Catanescu, V. and Cavicchioli, C. 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, Peter and Chujo, T. and Cicalo, C. and Cifarelli, L. and Cindolo, F. and Cleymans, J. and Coccetti, F. and Coffin, J. -P. and Coli, S. and Balbastre, G. Conesa and del Valle, Z. Conesa and Constantin, P. and Contin, G. and Contreras, J. G. and Cormier, T. M. and Morales, Y. Corrales and Maldonado, I. Cortes and Cortese, P. and Cosentino, M. R. and Costa, F. and Cotallo, M. E. and Crescio, E. and Crochet, P. and Cuautle, E. and Cunqueiro, L. and D'Erasmo, G. and Dainese, A. and Dalsgaard, H. H. and Danu, A. and Das, D. and Das, I. and Dash, A. and Dash, S. and De, S. and Moregula, A. De Azevedo 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 De Marco, N. and De Pasquale, S. and De Remigis, R. and de Rooij, R. and Delagrange, H. and Delgado Mercado, Y. and Dellacasa, G. and Deloff, A. and Demanov, V. and Denes, E. and Deppman, A. and Di Bari, D. and Di Giglio, C. and Di Liberto, S. and Di Mauro, A. and Di Nezza, P. and Dietel, T. and Divia, R. and Djuvsland, O. and Dobrin, A. and Dobrowolski, T. and Dominguez, I. and Doenigus, B. and Dordic, O. and Driga, O. and Dubey, A. K. and Ducroux, L. and Dupieux, P. and Majumdar, A. K. Dutta and Majumdar, M. R. Dutta 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 Evrard, S. 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 Fekete, V. and Felea, D. and Feofilov, G. and Tellez, A. 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K. and Grajcarek, R. and Grelli, A. and Grigoras, A. and Grigoras, C. and Grigoriev, V. and Grigoryan, A. and Grigoryan, S. and Grinyov, B. and Grion, N. and Gros, Philippe and Grosse-Oetringhaus, J. F. and Grossiord, J. -Y. and Grosso, R. and Guber, F. and Guernane, R. and Guerra Gutierrez, C. and Guerzoni, B. and Gulbrandsen, K. and Gulkanyan, H. and Gunji, T. and Gupta, A. and Gupta, R. and Gutbrod, H. and Haaland, O. and Hadjidakis, C. and Haiduc, M. and Hamagaki, H. and Hamar, G. and Harris, J. W. and Hartig, M. and Hasch, D. and Hasegan, D. and Hatzifotiadou, D. and Hayrapetyan, A. and Heide, M. and Heinz, M. and Helstrup, H. and Herghelegiu, A. and Hernandez, C. and Herrera Corral, G. and Herrmann, N. and Hetland, K. F. and Hicks, B. and Hille, P. T. and Hippolyte, B. and Horaguchi, T. and Hori, Y. and Hristov, P. and Hrivnacova, I. and Huang, M. and Huber, S. and Humanic, T. J. and Hwang, D. S. and Ichou, R. and Ilkaev, R. and Ilkiv, I. and Inaba, M. and Incani, E. and Innocenti, G. M. and Innocenti, P. G. and Ippolitov, M. and Irfan, M. and Ivan, C. and Ivanov, A. and Ivanov, M. and Ivanov, V. and Jacholkowski, A. and Jacobs, P. M. and Jancurova, L. and Jangal, S. and Janik, M. A. and Janik, R. and Jayarathna, S. P. and Jena, S. and Jirden, L. and Jones, G. T. and Jones, P. G. and Jovanovic, P. and Jung, H. and Jung, W. and Jusko, A. and Kalcher, S. and Kalinak, P. and Kalisky, M. and Kalliokoski, T. and Kalweit, A. and Kamermans, R. and Kanaki, K. and Kang, E. and Kang, J. H. and Kaplin, V. and Karavichev, O. and Karavicheva, T. and Karpechev, E. and Kazantsev, A. and Kebschull, U. and Keidel, R. and Khan, M. M. and Khanzadeev, A. and Kharlov, Y. and Kileng, B. and Kim, D. J. and Kim, D. S. and Kim, D. W. and Kim, H. N. and Kim, J. H. and Kim, J. S. and Kim, M. and Kim, M. and Kim, S. and Kim, S. 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  issn         = {{1550-2368}},
  language     = {{eng}},
  number       = {{11}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D (Particles, Fields, Gravitation and Cosmology)}},
  title        = {{Femtoscopy of pp collisions at root s=0.9 and 7 TeV at the LHC with two-pion Bose-Einstein correlations}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.84.112004}},
  doi          = {{10.1103/PhysRevD.84.112004}},
  volume       = {{84}},
  year         = {{2011}},
}