Measurement of Exclusive rho0 Meson Photoproduction at HERA

Reference July 2018
Document Conference paper or talk
Figures  (1)  (2a)  (2b)  (3a)  (3b)  (4a)  (4b)  (5)  (6a)  (6b)  (7a)  (7b)  (7c)  (7d)  (7e)  (7f)  (7g)  (7h)  (7i)  (7j)  (7k)  (7l)  (8a)  (8b)  (8c)  (8d)  (9a)  (9b)  (9c)  (9d)  (9e)  (9f)  (9g)  (9h)  (10a)  (10b)  (11)
Contact A. Bolz
Abstract Exclusive photoproduction of ρ 0 vector mesons is studied using the H1 detector at HERA. A sample of about 700000 decays rho0->pi+pi- was collected in the years 2006-2007, using the H1 Fast Track Trigger. It corresponds to an integrated luminosity of 1.3 inv.pb. The sample is used to study cross-sections as a function of the invariant mass m(pipi) of the decay pions, the photon-proton collision energy Wgammap and the momentum transfer at the proton vertex t. The phase-space restrictions are 0.5 < m(pipi) < 1.3 GeV, 20 < Wgammap < 80 GeV and |t| < 1.5 GeV^2 . Reactions where the proton stays intact are statistically separated from those where the proton dissociates to a low-mass hadronic system. The observed cross-section dependencies are parameterized using fits and are compared to expectations from phenomenological models.
Links back to overview listing     Locked H1 internal information