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Articles Particle Physics Transverse-momentum and Angular Distributions of Hadroproduced Muon Pairs (1978)
Transverse-momentum and Angular Distributions of Hadroproduced Muon Pairs (1978) |
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(1) S. W. Herb et al., Phys. Rev. Lett. 39, 252 (1977) and references therein; D. Antreasyn et al., ibid. 39, 906 (1977) and references therein.
(2) S. Drell and T.-M. Yan, Ann. Phys. (N.Y.) 66, 578 (1971). For recent discussions consult R. F. Peierls, T. L. Trueman, and L. L. Wang, Phys. Rev. D 16, 1397 (1977); C. Quigg, Rev. Mod. Phys. 49, 297 (1977).
(3) R. D. Field and R. P. Feynman, Phys. Rev. D 15, 2590 (1977).
(4) J. G. Branson et al., Phys. Rev. Lett. 38, 1334 (1977); W. Innes, Columbia-FNAL-SUNY Collaboration, SLAC Topical Conference on Particle Physics, 1977 (unpublished).
(5) These are essentially [cf. F. Close, F. Halzen, and D. Scott, Phys. Lett. 68B 447 (1977)] the following: (i) the value of 
in deep-inelastic scattering, and (ii) the transverse momenta of final-state hadrons in various processes, although this measures a convolution of production and decay distributions, as discussed in Ref. 6.
(6) R. Feynman, R. D. Field, and G. C. Fox, Nucl. Phys. B128, 1 (1977).
(7) Strange and charmed quarks do not contribute appreciably to the Drell-Yan process. If the 
and 
quarks have an effective mass 
, the angular distribution becomes 
; cf. K. V. Vasavada, Phys. Rev. D 16, 146 (1977). Note that the quarks must be very massive in order to obtain isotropy in 
for typical dimuon masses 
.
(8) 
violating couplings could give rise to 
terms (for 
rather than 
as the external hadrons), but spin-2 exchange is necessary for a 
term.
(9) M. Duong-Van, SLAC Report No. SLAC-Pub-1819, 1976 (unpublished); J. F. Gunion, Phys. Rev. D 14, 1400 (1976).
(10) The Drell-Yan model and our analysis are not applicable for 
in the region of obvious resonances 
. For example, in one model of 
hadroproduction (Ref. 11), two gluons fuse to produce a 
state, which then decays, 
. If the 
mass difference is ignored, then muons from 's arising from spin-0 's will be isotropic (
). For higher spin 's a set of density matrix elements leading to 
can always be chosen. We shall make further statements about the resonance regions in another article.
(11) M. Einhorn and S. Ellis, Phys. Rev. D 12, 2007 (1975); C. E. Carlson and R. Suaya, ibid. 14, 3115 (1976).
