Abstract
We calculate the rapidity dependence of leading-order medium dilepton yields resulting from a quark–gluon plasma which has a local time-dependent anisotropy in momentum space. We present a phenomenological model which includes the temporal evolution of the plasma anisotropy parameter, ξ, and the hard momentum scale, p hard. Our model interpolates between a 1+1 dimensional collisionally broadened expansion at early times and a 1+1 dimensional ideal hydrodynamic expansion at late times. Using our model, we find that at LHC energies, forward high-energy medium dilepton production would be suppressed by a factor of up to 3 if one assumes an isotropization/thermalization time of 2 fm/c. Therefore, it may be possible to use forward dilepton yields to experimentally determine the time of the onset of locally isotropic hydrodynamic expansion of the quark–gluon plasma as produced in ultrarelativistic heavy-ion collisions.
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References
P. Huovinen, P.F. Kolb, U.W. Heinz, P.V. Ruuskanen, S.A. Voloshin, Phys. Lett. B 503 (2001)
T. Hirano, K. Tsuda, Phys. Rev. C 66, 054905 (2002)
M.J. Tannenbaum, Rep. Prog. Phys. 69, 2005 (2006)
M. Luzum, P. Romatschke, Phys. Rev. C 78, 034915 (2008)
P. Romatschke, M. Strickland, Phys. Rev. D 68, 036004 (2003)
S. Mrowczynski, M.H. Thoma, Phys. Rev. D 62, 036011 (2000)
P. Arnold, J. Lenaghan, G.D. Moore, J. High Energy Phys. 0308, 002 (2003)
P. Romatschke, M. Strickland, Phys. Rev. D 70, 116006 (2004)
A. Rebhan, M. Strickland, M. Attems, Phys. Rev. D 78, 045023 (2008)
M. Martinez, M. Strickland, Phys. Rev. Lett. 100, 102301 (2008)
M. Martinez, M. Strickland, J. Phys. G 35, 104162 (2008)
M. Martinez, M. Strickland, Phys. Rev. C 78, 034917 (2008)
R. Baier, A.H. Mueller, D. Schiff, D.T. Son, Phys. Lett. B 502, 51 (2001)
J.I. Kapusta, L.D. McLerran, D. Srivastava, Phys. Lett. B 283, 145 (1992)
A. Dumitru, D.H. Rischke, T. Schonfeld, L. Winckelmann, H. Stoecker, W. Greiner, Phys. Rev. Lett. 70, 2860 (1993)
M. Strickland, Phys. Lett. B 331, 245 (1994)
D. Bodeker, J. High Energy Phys. 0510, 092 (2005)
P. Arnold, G.D. Moore, Phys. Rev. D 73, 025013 (2006)
P. Arnold, G.D. Moore, Phys. Rev. D 76, 045009 (2007)
B. Schenke, M. Strickland, C. Greiner, M.H. Thoma, Phys. Rev. D 73, 125004 (2006)
T. Renk, Phys. Rev. C 70, 021903 (2004)
T. Hirano, Y. Nara, Nucl. Phys. A 743, 305 (2004)
T. Hirano, Phys. Rev. C 65, 011901 (2002)
K. Morita, S. Muroya, C. Nonaka, T. Hirano, Phys. Rev. C 66, 054904 (2002)
I.G. Bearden et al. (BRAHMS Collaboration), Phys. Rev. Lett. 94, 162301 (2005)
I.C. Park et al. (PHOBOS Collaboration), Nucl. Phys. A 698, 564 (2002)
B.B. Back et al. (PHOBOS Collaboration), Phys. Rev. C 74, 021901 (2006)
G.I. Veres et al. (PHOBOS Collaboration). arXiv:0806.2803 [nucl-ex]
M. Bleicher. arXiv:hep-ph/0509314
A. Dumitru, U. Katscher, J.A. Maruhn, H. Stoecker, W. Greiner, D.H. Rischke, Z. Phys. A 353, 187 (1995)
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Martinez, M., Strickland, M. Suppression of forward dilepton production from an anisotropic quark–gluon plasma. Eur. Phys. J. C 61, 905–913 (2009). https://doi.org/10.1140/epjc/s10052-008-0851-8
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DOI: https://doi.org/10.1140/epjc/s10052-008-0851-8