Elastic and Proton-Dissociative rho0 Photoproduction at HERA

Details Elastic and Proton-Dissociative rho0 Photoproduction at HERA Elastic and Proton-Dissociative rho0 Photoproduction at HERA

1997-12-16

arxiv.org/abs/hep-ex/9712020v1

Eur.Phys.J.C2:247-267,1998

Physics

High Energy Physics

High Energy Physics - Experiment

42 pages including 17 figures

Scientific paper

10.1007/s100520050136

Elastic and proton-dissociative rho0 photoproduction (gamma p-->rho0 p,gamma p -->rho0 N,with rho0-->pi+pi-) has been studied in ep interactions at HERA for gamma-p centre-of-mass energies in the range 50pi+pi- p cross section is 11.2\pm 0.1(stat.)+1.1-1.2 (syst.) mub at =71.7 GeV. The t dependence of the cross section can be described by a function of the type Ae^(-b|t|+ct^2) with b=10.9\pm0.3(stat.)+1.0-0.5(syst.)GeV-2 and c=2.7\pm0.9(stat.)+1.9-1.7(syst.) GeV-4. The t dependence has also been studied as a function of W and a value of the slope of the pomeron trajectory 0.23\pm0.15(stat.)+0.10-0.07(syst.)GeV-2 has been deduced. The rho spin density matrix elements r^04_00,r^04_1-1 and Re[r^04_10] have been measured and found to be consistent with expectations based on SCHC. For p-dissociative pi+pi- photoproduction in the rho0 mass range, the distributions of the two-pion invariant mass, W and the polar and azimuthal angles of the pions in the helicity frame are the same within errors as those for the elastic process. The t distribution has been fitted to an exponential function with a slope parameter 5.8\pm0.3(stat.)\pm0.5(syst.)GeV-2. The ratio of the elastic to p-dissociative rho0 photoproduction cross section is 2.0\pm0.2(stat.)\pm0.7(syst.).

Affiliated with

Also associated with

No associations

Rating

Elastic and Proton-Dissociative rho0 Photoproduction at HERA does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Elastic and Proton-Dissociative rho0 Photoproduction at HERA, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elastic and Proton-Dissociative rho0 Photoproduction at HERA will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-156776