Inclusive D∗± production in photon-photon collisions
نویسندگان
چکیده
منابع مشابه
Inclusive D∗ Production in Photon-Photon Collisions at Next-to-Leading Order QCD
The next-to-leading order cross section for the inclusive production of charm quarks in γγ collisions is calculated as a function of the transverse momentum pT and the rapidity y in approaches using massive or massless charm quarks. For the direct cross section we derive the massless limit from the massive theory with the result that this limit differs from the massless version with MS factoriz...
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We calculate total and differential production rates of D∗ mesons in two-photon collisions at LEP2. We include full next-to-leading order QCD corrections, and perform an extensive study of the sensitivity of our predictions to variations of the renormalization scale, charm mass, photonic parton distribution set and fragmentation function. The results are compared with recent data from LEP2. CER...
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We present a NLO study of inclusive polarized prompt photon production in a conceivable fixed target pp mode of HERA with longitudinally polarized protons at √ s = 39 GeV. We analyze the sensitivity of the corresponding double spin asymmetry to the proton’s polarized gluon distribution ∆g and estimate the expected statistical precision in its determination. The main theoretical uncertainties in...
متن کاملInclusive hadron production in photon-photon collisions at next-to-leading order.
We study inclusive charged-hadron production in collisions of quasireal photons at next-to-leading order (NLO) in the QCD-improved parton model, using fragmentation functions recently extracted from PEP and LEP1 data of e+e− annihilation. We consistently superimpose the direct (DD), single-resolved (DR), and double-resolved (RR) γγ channels. We consider photon spectra generated by electromagnet...
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The inclusive production of D mesons in photon-photon collisions has been measured using the OPAL detector at LEP at ee centre-of-mass energies √ see of 183 and 189 GeV. The D ∗+ mesons are reconstructed in their decay to Dπ with the D observed in the two decay modes Kπ and Kπππ. After background subtraction, 100.4± 12.6 (stat) D mesons have been selected in events without observed scattered be...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1990
ISSN: 0370-2693
DOI: 10.1016/0370-2693(90)90578-t