Measurement of inclusive D * 1 production in two-photon collisions at LEP L 3 Collaboration

M. Acciarri, P., Achard, O., Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, Faj, T. Angelescu, F., Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia,L. Baksay, A. Balandras, R. C. Ball, S.,Banerjee, Sw. Banerjee, A. Barczyk, R. Barillère, L. Barone, Bartalini, R. Battiston, A. Bay, Becattini, U. Becker, F. Behner, L. Bellucci, J. Berdugo, P. Berges, B. Bertucci, B. L. Betev, Bhattacharya, M. Biasini, A. Biland, J. J. Blaising, S. C. Blyth, J. G., Bobbink, A. Bòhm, L. Boldizsar, B. Borgia, D. Bourilkov, M. Bourquin, S. Braccini, J. G. Branson, V. Brigljevic, Brochu, A. Buffini, A. Buijs, J. D. Burger, W. J. Burger, J., Busenitz, A. Button, X. D. Cai, M. Campanelli, M. Capell,G. Cara Romeo, G. Carlino, A. M. Cartacei, J. Casaus, G. Castellini, F. Cavallari, N. Cavallo, C. Cecchi, M. Cerrada, F. Cesaroni, M. Chamizo,Y. H. Chang, U. K. Chaturvedi, M. Chemarin, A. Chen, G. Chen, G. M. Chen, H. F. Chen, H. S. Chen, X. Chereau, G. Chiefari, L. Cifarelli, F. Cindolo, C. Civinini, I. Clare, R. Clare, G. Coignet, A. P. Colijn, N. Colino, S. Costantini, F. Cotorobai, B. Cozzoni,B. de la Cruz, A. Csilling, T. S. Dai, P. Déglon, A. Degré, M. Dittmar, M. T. Dova, D. Duchesneau, D. Dufournand, Duinker,H. El Mamouni, A. Engler, F. J. Eppling, F. C. Erné, P. Extermann, M. A. Falagan, A. Favara, J. Fay, Fedin, T. Ferguson, H. Fesefeldt, Filthaut, P. H. Fisher

semanticscholar（2019）

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摘要

Inclusive production of D * ± mesons in two-photon collisions was measured by the L3 experiment at LEP. The data were collected at a centre-of-mass energy Js = 189 GeV with an integrated luminosity of 176.4 pb 1 2345678. Differential cross sections of the process ee ^ee l)‘ X are determined as functions of the transverse momentum and pseudorapidity of the D* ± mesons in the kinematic region 1 GeV < p'/ < 5GeV and |t|d | < 1.4. The cross section integrated over this phase space domain is measured to be 132 + 22(stat.) + 26(syst.)pb. The differential cross sections are compared with next-to-leading order perturbative QCD calculations. © 1999 Published by Elsevier Science B.V. All rights reserved. 1 Also supported by CONICET and Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina. 2 Also supported by Panjab University, Chandigarh-160014, India. 3 Deceased. 4 Also supported by the Hungarian OTKA fund under contract numbers T22238 and T026178. 5 Supported by the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie. 6 Supported by the National Natural Science Foundation of China. 7 Supported by the Hungarian OTKA fund under contract num bers T019181, F023259 and T024011. 8 Supported also by the Comisión Interministerial de Ciencia y Tecnología.

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