Inclusive production of D $^{\ast\pm}$ mesons in photon-photon collisions at $\sqrt{s}_{\rm ee}=183$ and 189 GeV and a first measurement of $F^\gamma _{2,{\rm c}}$ | Zendy

G. Abbiendi | Zendy

Open Access

Inclusive production of D $^{\ast\pm}$ mesons in photon-photon collisions at $\sqrt{s}_{\rm ee}=183$ and 189 GeV and a first measurement of $F^\gamma _{2,{\rm c}}$

Author(s) -

G. Abbiendi

Publication year - 2000

Publication title -

the european physical journal c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.938

H-Index - 198

eISSN - 1434-6052

pISSN - 1434-6044

DOI - 10.1007/s100520000420

Subject(s) - physics , meson , particle physics , pseudorapidity , production (economics) , order (exchange) , charm quark , nuclear physics , charged particle , macroeconomics , ion , finance , quantum mechanics , economics

The inclusive production of D*+- mesons in photon-photon collisions has beenmeasured using the OPAL detector at LEP at e+e- centre-of-mass energies of 183and 189GeV. The D* mesons are reconstructed in their decay to D0pi+ with the D0observed in the two decay modes Kpi+ and Kpi+pi-pi+. After backgroundsubtraction, 100.4+-12.6(stat) D*+- mesons have been selected in events withoutobserved scattered beam electron ("anti-tagged") and 29.8+-5.9 (stat) D*+-mesons in events where one beam electron is scattered into the detector("single-tagged"). Direct and single-resolved events are studied separately.Differential cross-sections as functions of the D* transverse momentum p_t andpseudorapidity \eta are presented in the kinematic region 2

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