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Study of D∗ (2010)± production in ep collisions at HERAстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: Bashindzhagyan G.L., Ermolov P.F., Gladilin L.K., Golubkov Y.A., Kobrin V.D., Kuzmin V.A., Proskuryakov A.S., Savin A.A., Shcheglova L.M., Solomin A.N., Zotov N.P., ZEUS C.
- Журнал: Physics Letters B
- Том: 349
- Номер: 1–2
- Год издания: 1995
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 225
- Последняя страница: 237
- DOI: 10.1016/0370-2693(95)00253-H
- Аннотация: We report the first observation of charmed mesons with the ZEUS detector at HERA using the decay channel View the MathML source. Clear signals in the mass difference View the MathML source as well as in the M(Kπ) distribution at the D0 mass are found. The ep cross section for inclusive D∗± production with Q2 < 4 GeV2 in the γp centre-of-mass energy range 115 < W < 275 GeV has been determined to be (32±7−7+4) nb in the kinematic region pt(D∗) ≥ 1.7 GeV, View the MathML source. Extrapolating outside this region, assuming a mass of the charm quark of 1.5 GeV, we estimate the ep charm cross section to be View the MathML source μb at View the MathML source GeV and 〈W〉 = 198 GeV. The average γp charm cross section View the MathML source is found to be (6.3 ± 2.2−3.0+6.3) μb at 〈W〉 = 163 GeV and (16.9 ± 5.2−8.5+13.9) μb at 〈W〉 = 243 GeV. The increase of the total charm photoproduction cross section by one order of magnitude with respect to low energy data experiments is well described by QCD NLO calculations using singular gluon distributions in the proton.
- Добавил в систему: Проскуряков Александр Сергеевич