Abstract
The inclusive distributions of gluons and pions for high-energy N N collisions are calculated. The results for several unintegrated gluon distributions (UGD’s) from the literature are compared. We find huge differences in both rapidity and p tof gluons and σ’s in N N collisions for different models of UGD’s. The Kharzeev-Levin UGD gives good description of momentum distribution of charged hadrons at midrapidities. We find, however, that the gluonic mechanism discussed does not describe the inclusive distributions of charged particles in the fragmentation region. Some of the missing mechanisms are calculated with the help of unintegrated parton distributions being solutions of the Kwieciński CCFM equations. We predict an asymmetry in π+ and π− production which could be studied by the BRAHMS Collaboration at RHIC.
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References
Proc. of the Quark Matter 2002 Conference, July 2002, Nantes, France; Proc. of the Quark Matter 2004 Conference, January 2004, Oakland, USA.
B.B. Back et al. (PHOBOS Collaboration), Phys. Rev. Lett. 87 (2001) 102303–1.
D. Kharzeev and E. Levin, Phys. Lett. B523 (2001) 79.
I.G. Bearden et al. (BRAHMS Collaboration), Phys. Rev. Lett. 87 (2001) 112305.
A.J. Askew, J. Kwieciński, A.D. Martin and P.J. Sutton, Phys. Rev. D49 (1994) 4402.
K. Golec-Biernat and M. Wüsthoff, Phys. Rev. D59 (1999) 014017.
K. Golec-Biernat and M. Wüsthoff, Phys. Rev. D60 (1999) 114023–1.
M.A. Kimber, A.D. Martin and M.G. Ryskin, Eur. Phys. J. C12 655; M.A. Kimber, A.D. Martin and M.G. Ryskin, Phys. Rev. D63 (2001) 114027-1.
J. Blümlein, Talk at the Workshop on Deep Inelatic Scattering and QCD [hep-ph/9506403].
L.V. Gribov, E.M. Levin and M.G. Ryskin, Phys. Lett. B100 (1981) 173.
A. Szczurek, Acta Phys. Polon. 34 (2003) 3191.
J. Binnewies, B.A. Kniehl and G. Kramer, Phys. Rev. D52 (1995) 4947.
S. Kretzer, Phys. Rev. D62 (2000) 054001.
G.J. Alner et al. (UA5 Collaboration), Z. Phys. C33 (1986) 1.
C. Albajar et al. (UA1 Collaboration), Nucl. Phys. B335 (1990) 261.
J. Kwieciński, Acta Phys. Polon. B33 (2002) 1809.
A. Gawron, J. Kwieciński and W. Broniowski, Phys. Rev. D68 (2003) 054001.
A. Accardi, Acta Phys. Hung. A 22 (2005) 289 [nucl-th/0405046].
A. Szczurek and M. Czech, a paper in preparation.
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Szczurek, A., Czech, M. Unintegrated parton distributions and meson production in hadronic collisions. Acta Phys. Hung. A 22, 335–342 (2005). https://doi.org/10.1556/APH.22.2005.3-4.20
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DOI: https://doi.org/10.1556/APH.22.2005.3-4.20
Keywords
- pion production
- nucleon-nucleon collisions
- unintegrated parton distributions
- fragmentation functions
- inclusive distributions