Q2dependence of diffractive vector meson electroproduction

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Radiative Effects in Processes of Diffractive Vector Meson Electroproduction

The electromagnetic radiative correction to the cross section of the vector meson electroproduction is calculated. Explicit covariant formulae for the observed cross section are obtained. The dependence of the radiative correction on the experimental resolution and on the inelasticity cut is discussed. FORTRAN code DIFFRAD based on both exact (ultrarelativistic) and approximate sets of the form...

متن کامل

Diffractive electroproduction of ρ meson excitations

We use perturbative QCD and parton-hadron duality to estimate the cross sections for the diffractive electroproduction of ρ ′ (1 −) and ρ(3 −) resonances which occur in the 1.3– 1.8 GeV mass interval. We present the cross sections and the ratios σ L /σ T as a function of Q 2. We compare the predictions with those for the diffractive electroproduction of ρ mesons. We show how such diffractive el...

متن کامل

The effect of off-diagonal parton distributions in diffractive vector meson electroproduction

We present a simple physical description of the off-diagonal gluon distribution g(x, x′, Q2) and splitting function Pgg(x, x ′) which enter the amplitude for diffractive vector meson production. We study the off-diagonal effects both on the evolution in Q2 and on the input distribution. We predict the ratio R of the off-diagonal to the diagonal gluon density, x′g(x, x′, Q2)/xg(x,Q2), as a funct...

متن کامل

Electroproduction of the φ ( 1020 ) Vector Meson

We studied the reaction ep → e′p′φ with a 4.2 GeV incident electron beam in the region of the electroproduction variables Q from 0.7 to 2.2 GeV and W from 2.0 to 2.6 GeV. The data were taken and analyzed at the Thomas Jefferson National Accelerator Facility. For the first time, we observe the expected t-slope dependence on Q and ∆τ in φ vector meson production. We find that the width of the for...

متن کامل

The QCD description of diffractive ρ meson electroproduction

We critically review the QCD predictions for the cross sections σL and σT for diffractive ρmeson electroproduction in longitudinally and transversely polarised states in the HERA energy region. We show that both perturbative and non-perturbative approaches which involve convolution with the ρ meson wave function predict values of σT which fall-off too quickly with increasing Q2, in comparison w...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical Review D

سال: 2000

ISSN: 0556-2821,1089-4918

DOI: 10.1103/physrevd.62.014022