Abstract.
Azimuthal correlations between the same type of particles (protons or pions) in the target fragmentation region was studied in d, He, C+C, Ta (4.2A GeV/c, C+Ne, Cu (4.5A GeV/c) and p+C, Ta (10 GeV/c) interactions. The data were obtained from the SKM-200-GIBS streamer chamber and from the Propane Bubble Chamber (PBL-500) systems utilized at JINR. Study of multiparticle azimuthal correlations offers unique information about space-time evolution of the interactions. Azimuthal correlations were investigated by using correlation function \( C(\Delta\phi) = \mathrm{d} N/\mathrm{d} (\Delta\phi)\) , where \( \Delta\phi\) represents the angle between the sums of transverse momenta vectors for particles emitted in the forward and backward hemispheres. For protons “back-to-back” (“negative”) azimuthal correlations were observed in the above-mentioned interactions. The absolute values of the correlation coefficient \( \vert\xi\vert\) --the slope parameter of \( C(\Delta\phi)\), strongly depend on the mass number of the target (\( A_{T}\)) nuclei in the nucleon-nucleus and nucleus-nucleus collisions. Namely, \( \vert\xi\vert\) decreases with increase of \( A_T\) in p+C and p+Ta collisions, while \( \vert\xi\vert\) initially decreases from d+C to C+Ne and then almost does not change with increase of \( A_P\), \( A_T\) in (d+He)Ta, C+Cu and C+Ta collisions. For pions “back-to-back” correlations were obtained for light targets (C, Ne), and “side-by-side” (“positive”) correlations for heavy targets (Cu, Ta). The \( \vert\xi\vert\) insignificantly changes with increase of the momenta per nucleon and almost does not change with increase of \( A_P\) and \( A_T\). Models used for description of the data, the Ultra relativistic Quantum Molecular Dynamic (UrQMD) and Quark-Gluon String Model (QGSM), satisfactorily describe the obtained experimental results.
Similar content being viewed by others
References
S.A. Bass et al., Nucl. Phys. A 661, 205 (1999)
K.H. Ackermann et al., Phys. Rev. Lett. 86, 402 (2001)
B. Zhang, M. Gyulassy, C.M. Ko, Phys. Lett. B 455, 45 (1999)
J.-Y. Ollitrault, Phys. Rev. D 46, 229 (1992)
P. Danielewicz et al., Phys. Rev. Lett. 81, 2438 (1998)
C. Pinkenburg et al., Phys. Rev. Lett. 83, 1295 (1999)
G. Agakishiev et al., Phys. Rev. C 85, 014901 (2012)
K. Aamodt et al., Phys. Rev. Lett. 105, 252302 (2010)
G. Aad et al., Phys. Lett. B 707, 330 (2012)
A.Kh. Vinitsky et al., Yad. Fiz. 54, 1636 (1991) Sov. J. Nucl. Phys. 54
A. Adare et al., Phys. Rev. C 94, 054910 (2016)
H.H. Gutbrod et al., Phys. Rev. C 42, 640 (1990)
S.A. Bass et al., Phys. Rev. C 51, 3343 (1995)
H.A. Gustafsson et al., Z. Phys. A 321, 389 (1985)
H.R. Schmidt et al., Nucl. Phys. A 544, 449 (1992)
T.C. Awes et al., Phys. Lett. B 381, 29 (1996)
L. Chkhaidze et al., Phys. Lett. B 411, 26 (1997)
L. Chkhaidze et al., Phys. Lett. B 479, 21 (2000)
L. Chkhaidze et al., Phys. Atom. Nucl. 67, 693 (2004)
L. Chkhaidze et al., Phys. Atom. Nucl. 75, 811 (2012)
L. Chkhaidze et al., Eur. Phys. J. A 1, 299 (1998)
L. Chkhaidze et al., Eur. Phys. J. A 52, 351 (2016)
L. Chkhaidze et al., Phys. Rev. C 65, 054903 (2002)
L. Chkhaidze et al., Phys. Rev. C 84, 064915 (2011)
L. Chkhaidze et al., Nucl. Phys. A 794, 115 (2007)
L. Chkhaidze et al., Nucl. Phys. A 831, 22 (2009)
L. Chkhaidze, T. Djobava, L. Kharkhelauri, Phys. Part. Nucl. 33, 196 (2002)
L. Chkhaidze, T. Djobava, L. Kharkhelauri, Phys. Atom. Nucl. 65, 1479 (2002)
L. Chkhaidze et al., GESJ: Phys. 2, 98 (2013)
M. Anikina, JINR E1-84-785 (Dubna, 1998)
M. Anikina et al., Phys. Rev. C 33, 895 (1986)
L. Chkhaidze et al., Bull. Georg. Acad. Sci. 164, 271 (2001)
G.N. Agakishiev et al., Yad. Phys. 65, 1515 (1986)
A.I. Bondarenko, JINR P1-98-292 (Dubna, 1998)
G.N. Agakishiev et al., Yad. Fiz. 43, 366 (1986)
D. Armutliiski et al., Yad. Fiz. 45, 1047 (1987) Sov. J. Nucl. Phys. 45
K.H. Kampert et al., Nucl. Phys. A 544, 183c (1991)
S.A. Bass et al., Prog. Part. Nucl. Phys. 41, 225 (1998)
M. Bleicher et al., J. Phys. G 25, 1859 (1999)
A.S. Botvina et al., Nucl. Phys. A 475, 663 (1987)
N. Amelin et al., Yad. Fiz. 51, 512 (1990) Sov. J. Nucl. Phys. 51
N. Amelin et al., Yad. Fiz. 52, 272 (1990) Sov. J. Nucl. Phys. 52
N. Amelin et al., Phys. Rev. Lett. 67, 1523 (1991)
Kh. Abdel-Waged, Phys. Rev. C 67, 064610 (2003)
Kh. Abdel-Waged, J. Phys. G 31, 739 (2005)
Ch. Hartnack et al., Eur. Phys. J. A 1, 151 (1998)
N. Amelin, JINR Preprint P2-86-837 (Dubna, 1986)
Th. Lister, GSI 94-1 (University of Munster, 1994)
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by D. Blaschke
Rights and permissions
About this article
Cite this article
Chkhaidze, L., Chlachidze, G., Djobava, T. et al. Study of azimuthal correlations in the target fragmentation region in p, d, He, C+C, Ta and C+Ne, Cu collisions at momenta of 4.2, 4.5 and 10 A GeV/c. Eur. Phys. J. A 55, 7 (2019). https://doi.org/10.1140/epja/i2019-12674-9
Received:
Accepted:
Published:
DOI: https://doi.org/10.1140/epja/i2019-12674-9