Diffractive charged meson pair production
نویسندگان
چکیده
منابع مشابه
Diiractive Charged Meson Pair Production
We investigate the possibility to measure the nonforward gluon distribution function by means of diiractively produced + ? and K + K ? pairs in polarized lepton nucleon scattering. The resulting cross sections are sizable and are dominated by the gluonic contribution. We nd large spin asymmetries, both for + ? and for K + K ? pairs.
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I review the recent progress in the theory of s-channel helicity nonconservation (SCHNC) effects in diffractive DIS. SCHNC in diffractive vector meson production is an unique probe of the spin-orbit coupling and Fermi motion of quarks in vector mesons. Photoand electroproduction of the φ and its radial and angular excitations at Jlab is perfectly posed to probe SCHNC in QCD pomeron exchange. I ...
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The decay distributions of 0 and mesons diiractively produced by tagged virtual photons from the 27.5 GeV HERA positron beam impinging on an internal 3 He target have been measured with the Hermes spectrometer. Both the scattered positron and the two outgoing hadrons from the vector meson decay were detected in coincidence, and exclusive elastic events selected for analysis. The decay angular d...
متن کاملar X iv : h ep - p h / 99 01 28 3 v 2 2 9 A pr 1 99 9 Diffractive charged meson pair production
We investigate the possibility to measure the nonforward gluon distribution function by means of diffractively produced π+π− and K+K− pairs in polarized lepton nucleon scattering. The resulting cross sections are small and are dominated by the gluonic contribution. We find relatively large spin asymmetries, both for π+π− and for K+K− pairs. PACS. 12.38.-t, 13.60.-r, 13.60.Le
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1999
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(99)00513-4