Uncertainties in air showers from small-x pQCD mini-jets
Tóm tắt
To investigate uncertainties in air shower simulations caused by the small-x regime, a model including leading-twist hard pQCD plus soft processes was built, which are separated by an energy dependent transverse momentum cut-off. We provide a fit of the cut-off to the total pp cross section for different PDFs using the eikonal formalism and show that for modern PDF sets there is only a small uncertainty in the mini-jet cross section, and hence in the finalstate multiplicity and the number of produced muons.
Tài liệu tham khảo
K. Arisaka, talk at workshop Ultrahigh Energy Cosmic Rays, Aug. 22–Sep. 11, 2005, Aspen; P. LeCoultre, proceedings of the 29th Intern. Cosmic Ray Conference (ICRC 2005), 3–11 Aug. 2005, Pune, India; A. Haungs, ibid.
R. Engel, Nucl. Phys. Proc. Suppl. 122 (2003) 40.
H.J. Drescher et al., hep-ph/0408073; hep-ph/0501165.
A. Capella, U. Sukhatme, C.I. Tan and J. Tran Thanh Van, Phys. Rep. 236 (1994) 225.
J.F. Owens, Rev. Mod. Phys. 59, (1987) 465.
T.T. Chou and C.N. Yang, Phys. Rev. Lett. 20 (1968) 1213.
CTEQ6, hep-ph/0201195; GRV98, hep-ph/9806404; DO, Phys. Rev. D 30 (1984) 49.
L. Durand and P. Hong, Phys. Rev. Lett. 58 (1987) 303.
S. Eidelman et al., Phys. Lett. B 592 (2004) 1.