منابع مشابه
Inclusive Charm Production at HERA and the Charm
We calculate the contribution to inclusive high tranverse momentum (p T) charm production at HERA from the excitation of charm in the photon. At large values of p T the results of such a calculation, in the structure function language, will be more reliable as it sums the large logs, log(p 2 T =m 2 c), as opposed to calculating the contribution of the 2 ! 3 subprocess in xed order of perturbati...
متن کاملGeometric scaling in inclusive charm production.
We show that the cross section for inclusive charm production exhibits geometric scaling in a large range of photon virtualities. In the DESY ep collider HERA kinematic domain the saturation momentum Q(2)(sat)(x) stays below the hard scale micro(2)(c)=4m(2)(c), implying charm production probing mostly the color transparency regime and unitarization effects being almost negligible. We derive our...
متن کاملInclusive Charm Production at HERA and the Charm Content of the Photon
We calculate the contribution to inclusive high tranverse momentum (pT ) charm production at HERA from the excitation of charm in the photon. At large values of pT the results of such a calculation, in the structure function language, will be more reliable as it sums the large logs, log(pT /m 2 c), as opposed to calculating the contribution of the 2 → 3 subprocess in fixed order of perturbation...
متن کاملExclusive and semi - inclusive strangeness and charm production in πN and NN reactions ⋆
Using the Quark-Gluon Strings Model (QGSM) combined with Regge phenomenology we consider the reactions π − p → K 0 Λ and π − p → D − Λ + c which are dominated by the contributions of the K * and D * Regge trajectories, respectively. The spin structure of the amplitudes is described by introducing Reggeized Born terms. It is found that the existing data for the reaction π − p → K 0 Λ are in reas...
متن کاملMeasurement of charm production in two-photon processes using inclusive lepton events at TRISTAN
Measurements of open charm production in photon-photon collisions made with the AMY detector at TRISTAN are reported. Charmed hadrons were identi ed by detecting the high momentum muons or electrons from their semileptonic decays. The data sample corresponds to an integrated luminosity of 275 pb 1 at an average center of mass energy of 58 GeV. Results are presented in the form of cross sections...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2007
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.76.114018