Abstract
As an archetype reaction for pQCD multigluon hard processes in collisions of ultrarelativistic nuclei, we analyze generic features of lepton pair production via multiphoton processes in peripheral heavy ion scattering. We report explicit results for collisions of two photons from one nucleus with two photons from the other nucleus, 2γ + 2γ → l + l −. The results suggest that the familiar eikonalization of Coulomb distortions breaks down for oppositely moving Coulomb centers. The breaking of eikonalization in QED suggests that multigluon pQCD processes cannot be described in terms of collective nuclear gluon distributions. We discuss a logarithmic enhancement of the contribution from the 2γ + 2γ → l + l − process to production of lepton pairs with large transverse momentum; similar enhancement is absent for the nγ + mγ → l + l − processes with m, n > 2. We comment on the general structure of multiphoton collisions and properties of higher-order terms that cannot be eikonalized.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
H. Bethe and L. Maximon, Phys. Rev. 93, 768 (1954); H. Davies, H. Bethe, and L. Maximon, Phys. Rev. 93, 788 (1954).
L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 3: Quantum Mechanics: Non-Relativistic Theory, 4th ed. (Nauka, Moscow, 1989; Pergamon, New York, 1977).
D. Yu. Ivanov and K. Melnikov, Phys. Rev. D 57, 4025 (1998).
S. R. Gevorkyan and S. S. Grigoryan, Phys. Rev. A 65, 022505 (2002).
N. N. Nikolaev, W. Schafer, B. G. Zakharov, and V. R. Zoller, Zh. Éksp. Teor. Fiz. 124, 491 (2003) [JETP 97, 441 (2003)].
N. N. Nikolaev, W. Schafer, B. G. Zakharov, and V. R. Zoller, hep-ph/0408054; Proc. of 12th Int. Workshop on Deep Inelastic Scattering (DIS2004), Štrbske Pleso, Slovakia.
A. J. Baltz and L. McLerran, Phys. Rev. C 58, 1679 (1998).
B. Segev and J. C. Wells, Phys. Rev. A 57, 1849 (1998).
U. Eichmann, J. Reinhardt, and W. Greiner, Phys. Rev. A 61, 062710 (2000).
D. Yu. Ivanov, A. Schiller, and V. G. Serbo, Phys. Lett. B 457, 155 (1999).
R. N. Lee and A. I. Milstein, Phys. Rev. A 61, 032103 (2000).
E. Bartoš, S. R. Gevorkyan, N. N. Nikolaev, and E. A. Kuraev, Phys. Rev. A 66, 042720 (2002).
E. Bartoš, S. R. Gevorkyan, N. N. Nikolaev, and E. A. Kuraev, Phys. Lett. B 538, 45 (2002).
S. R. Gevorkyan and E. A. Kuraev, J. Phys. G 29, 1227 (2003).
V. N. Gribov, L. N. Lipatov, and G. V. Frolov, Yad. Fiz. 12, 994 (1970) [Sov. J. Nucl. Phys. 12, 543 (1971)].
I. F. Ginzburg, S. L. Panfil, and V. G. Serbo, Nucl. Phys. B 284, 685 (1987).
E. Bartoš, S. R. Gevorkyan, and E. A. Kuraev, Yad. Fiz. 67, 1945 (2004) [Phys. At. Nucl. 67, 1923 (2004)].
Author information
Authors and Affiliations
Additional information
From Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, Vol. 127, No. 4, 2005, pp. 732–743.
Original English Text Copyright © 2005 by Barto, Gevorkyan, Kuraev, Nikolaev.
This article was submitted by the authors in English.
Rights and permissions
About this article
Cite this article
Bartoš, E., Gevorkyan, S.R., Kuraev, E.A. et al. Multiple exchanges in lepton pair production in high-energy heavy ion collisions. J. Exp. Theor. Phys. 100, 645–655 (2005). https://doi.org/10.1134/1.1926426
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1926426