Abstract
In this work we investigate the single- and the double-spin asymmetries at the collisions of polarized protons pp → (γ *, Z 0, Z′) + X within the scope of QCD, the electroweak interaction and superstring E 6 theory. The helicity amplitude method is used. Analytical expressions for the single- and the double-spin asymmetries are obtained and their dependence on the transverse momentum of the lepton pair is investigated at the three different values of invariant masses of the lepton pair. The pure contribution coming from the superstring Z′ boson on the single- and double- spin asymmetries has been extracted. The results obtained allow investigation of the spin structure of the proton.
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References
EMC Collab.: J. Ashman et al.: “A measurement of the spin asymmetry and determination of the structure function g 1 in deep inelastic muon-proton scattering”, Phys. Lett. B, Vol. 206, (1988), pp. 364–370.
K. Abe et al.: “Precision measurement of the proton spin structure function g p1 ”, Phys. Rev. Lett., Vol. 74, (1995), pp. 346–350.
D.L. Anthony et al.: “Determination of the neutron spin structure function”, Phys. Rev. Lett., Vol. 71, (1993), pp. 959–962.
Spin Muon Collaboration (SMC): D. Adams et al.: “A new measurement of the spin-dependent structure function g 1(x) of the deutron”, Phys. Lett. B, Vol. 357, (1995), pp. 248–254.
T. Gehrmann: “QCD corrections to the longitudinally polarized Drell-Yan process”, Nucl. Phys. B, Vol. 498, (1997), pp. 245–266.
Y. Kanazawa, Y. Koike and N. Nishiyama: “A LT in the polarized Drell-Yan process at RHIC and HERA energies”, Phys. Lett. B, Vol. 430, (1998), pp. 195–202.
E. Leader and K. Sridhar: “Single- and double- spin asymmetries in the Drell-Yan process at RHIC”, Phys. Lett. B, Vol. 311, (1993), pp. 324–328.
R.Kh. Muradov, A.I. Akhmedov and R.M. Burdjaliev: “Polarization effects in proton-proton collisions”, Physics of Atomic Nuclei, Vol. 65(7), (2002), pp. 1352–1358.
R.D. Carlits and R.S. Willey: “Single-spin asymmetries in muon pair production”, Phys. Rev. D. Vol. 45, (1992), pp. 2323–2348.
E. Byckling and K. Kajantie: Particle Kinematics, Wiley, New York, 1973.
E. Reya: “Peturbative Quantum Chromodynamics”, Phys. Rep., Vol. 69, (1981), pp. 195–333.
H.-Y. Cheng, H.H. Liu and C.-Y. Wu: “Polarized parton distribution functions reexamined”, Phys. Rev. D, Vol. 53, (1996), pp. 2380–2389.
M. Gluck, E. Reya, M. Stratmann and W. Vogelsang: “Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering”, Phys. Rev. D, Vol. 53, (1996), pp. 4775–4786.
A.D. Martin, R.G. Roberts and W.J. Stirling: “Parton distributions of the proton”, Phys. Rev. D, Vol. 50, (1994), pp. 6734–6752.
M.B. Green and J.H. Schwars: “Anomaly Cancellations in Supersymmetric D=10 Gauge Theory and Superstring Theory”, Phys. Lett. B, Vol. 149, (1984), pp. 117–122.
CDF Collaboration: F. Abe et al.: “Double parton scattering in\(p\bar p\) collisions at\(\sqrt s = 1.8\) TeV”, Phys. Rev. D, Vol. 56, (1997), pp. 3811–3832.
T. Gherghetta, T.A. Kaeding and G.L. Kane: “Supersymmetric contributions to the decay of an extra Z boson”, Phys. Rev. D, Vol. 57, (1998), pp. 3178–3181.
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Muradov, R.K., Ahmadov, A.I. Contribution of superstring Z′ boson on the polarization effects in proton proton collisions. centr.eur.j.phys. 3, 433–455 (2005). https://doi.org/10.2478/BF02475649
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DOI: https://doi.org/10.2478/BF02475649