Measurement of the D∗± cross section in two photon collisions at LEP

Buskulic, D.; Casper, D.; Debonis, I.; Decamp, D.; Ghez, P.; Goy, C.; Lees, J.; Minard, M.; Odier, P.; Pietrzyk, B.; Ariztizabal, F.; Chmeissani, M.; Crespo, J.; Efthymiopoulos, I.; Fernandez, E.; Fernandezbosman, M.; Gaitan, V.; Garrido, L.; Martinez, M.; Orteu, S.; Pacheco, A.; Padilla, C.; Palla, F.; Pascual, A.; Perlas, J.; Sanchez, F.; Teubert, F.; Creanza, D.; Depalma, M.; Farilla, A.; Iaselli, G.; Maggi, G.; Marinelli, N.; Natali, S.; Nuzzo, S.; Ranieri, A.; Raso, G.; Romano, F.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Zito, G.; Huang, X.; Lin, J.; Ouyang, Q.; Wang, T.; Xie, Y.; Xu, R.; Xue, S.; Zhang, J.; Zhang, L.; Zhao, W.; Bonvicini, G.; Cattaneo, M.; Comas, P.; Coyle, P.; Drevermann, H.; Engelhardt, A.; Forty, R.; Frank, M.; Girone, M.; Hagelberg, R.; Harvey, J.; Jacobsen, R.; Janot, P.; Jost, B.; Knobloch, J.; Lehraus, I.; Maggi, M.; Markou, C.; Martin, E.; Mato, P.; Meinhard, H.; Minten, A.; Miquel, R.; Oest, T.; Palazzi, P.; Pater, J.; Perrodo, P.; Pusztaszeri, J.; Ranjard, F.; Rensing, P.; Rolandi, L.; Schlatter, D.; Schmelling, M.; Schneider, O.; Tejessy, W.; Tomalin, I.; Venturi, A.; Wachsmuth, H.; Wiedenmann, W.; Wildish, T.; Witzeling, W.; Wotschack, J.; Ajaltouni, Z.; Bardadinotwinowska, M.; Barres, A.; Boyer, C.; Falvard, A.; Gay, P.; Guicheney, C.; Henrard, P.; Jousset, J.; Michel, B.; Monteil, S.; Montret, J.; Pallin, D.; Perret, P.; Podlyski, F.; Proriol, J.; Rossignol, J.; Saadi, F.; Fearnley, T.; Hansen, J.; Hansen, J.; Hansen, J.; Hansen, P.; Nilsson, B.; Kyriakis, A.; Simopoulou, E.; Siotis, I.; Vayaki, A.; Zachariadou, K.; Blondel, A.; Bonneaud, G.; Brient, J.; Bourdon, P.; Passalacqua, L.; Rouge, A.; Rumpf, M.; Tanaka, R.; Valassi, A.; Verderi, M.; Videau, H.; Candlin, D.; Parsons, M.; Focardi, E.; Parrini, G.; Corden, M.; Delfino, M.; Georgiopoulos, C.; Jaffe, D.; Antonelli, A.; Bencivenni, G.; Bologna, G.; Bossi, F.; Campana, P.; Capon, G.; Cerutti, F.; Chiarella, V.; Felici, G.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, G.; Pepealtarelli, M.; Dorris, S.; Halley, A.; Tenhave, I.; Knowles, I.; Lynch, J.; Morton, W.; Oshea, V.; Raine, C.; Reeves, P.; Scarr, J.; Smith, K.; Smith, M.; Thompson, A.; Thomson, F.; Thorn, S.; Turnbull, R.; Becker, U.; Braun, O.; Geweniger, C.; Graefe, G.; Hanke, P.; Hepp, V.; Kluge, E.; Putzer, A.; Rensch, B.; Schmidt, M.; Sommer, J.; Stenzel, H.; Tittel, K.; Werner, S.; Wunsch, M.; Beuselinck, R.; Binnie, D.; Cameron, W.; Colling, D.; Dornan, P.; Konstantinidis, N.; Moneta, L.; Moutoussi, A.; Nash, J.; Sanmartin, G.; Sedgbeer, J.; Stacey, A.; Dissertori, G.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bowdery, C.; Brodbeck, T.; Colrain, P.; Crawford, G.; Finch, A.; Foster, F.; Hughes, G.; Sloan, T.; Whelan, E.; Williams, M.; Galla, A.; Greene, A.; Kleinknecht, K.; Quast, G.; Raab, J.; Renk, B.; Sander, H.; Wanke, R.; Zeitnitz, C.; Aubert, J.; Bencheikh, A.; Benchouk, C.; Bonissent, A.; Bujosa, G.; Calvet, D.; Carr, J.; Diaconu, C.; Etienne, F.; Thulasidas, M.; Nicod, D.; Payre, P.; Rousseau, D.; Talby, M.; Abt, I.; Assmann, R.; Bauer, C.; Blum, W.; Brown, D.; Dietl, H.; Dydak, F.; Gotzhein, C.; Jakobs, K.; Kroha, H.; Lutjens, G.; Lutz, G.; Manner, W.; Moser, H.; Richter, R.; Rosadoschlosser, A.; Settles, R.; Seywerd, H.; Stierlin, U.; Stdenis, R.; Wolf, G.; Alemany, R.; Boucrot, J.; Callot, O.; Cordier, A.; Courault, F.; Davier, M.; Duflot, L.; Grivaz, J.; Heusse, P.; Jacquet, M.; Kim, D.; Lediberder, F.; Lefrancois, J.; Lutz, A.; Musolino, G.; Nikolic, I.; Park, H.; Park, I.; Schune, M.; Simion, S.; Veillet, J.; Videau, I.; Abbaneo, D.; Azzurri, P.; Bagliesi, G.; Batignani, G.; Bettarini, S.; Bozzi, C.; Calderini, G.; Carpinelli, M.; Ciocci, M.; Ciulli, V.; Dellorso, R.; Fantechi, R.; Ferrante, I.; Foa, L.; Forti, F.; Giassi, A.; Giorgi, M.; Gregorio, A.; Ligabue, F.; Lusiani, A.; Marrocchesi, P.; Messineo, A.; Rizzo, G.; Sanguinetti, G.; Sciaba, A.; Spagnolo, P.; Steinberger, J.; Tenchini, R.; Tonelli, G.; Triggiani, G.; Vannini, C.; Verdini, P.; Walsh, J.; Betteridge, A.; Blair, G.; Bryant, L.; Gao, Y.; Green, M.; Johnson, D.; Medcalf, T.; Mir, L.; Strong, J.; Bertin, V.; Botterill, D.; Clifft, R.; Edgecock, T.; Haywood, S.; Edwards, M.; Maley, P.; Norton, P.; Thompson, J.; Blochdevaux, B.; Colas, P.; Duarte, H.; Emery, S.; Kozanecki, W.; Lancon, E.; Lemaire, M.; Locci, E.; Marx, B.; Perez, P.; Rander, J.; Renardy, J.; Rosowsky, A.; Roussarie, A.; Schuller, J.; Schwindling, J.; Mohand, D.; Trabelsi, A.; Vallage, B.; Johnson, R.; Kim, H.; Litke, A.; Mcneil, M.; Taylor, G.; Beddall, A.; Booth, C.; Boswell, R.; Cartwright, S.; Combley, F.; Dawson, I.; Koksal, A.; Letho, M.; Newton, W.; Rankin, C.; Thompson, L.; Bohrer, A.; Brandt, S.; Cowan, G.; Feigl, E.; Grupen, C.; Lutters, G.; Minguetrodriguez, J.; Rivera, F.; Saraiva, P.; Smolik, L.; Stephan, F.; Bosisio, L.; Dellamarina, R.; Ganis, G.; Giannini, G.; Gobbo, B.; Pitis, L.; Ragusa, F.; Rothberg, J.; Wasserbaech, S.; Armstrong, S.; Bellantoni, L.; Elmer, P.; Feng, Z.; Ferguson, D.; Gao, Y.; Gonzalez, S.; Grahl, J.; Harton, J.; Hayes, O.; Hu, H.; Mcnamara, P.; Nachtman, J.; Orejudos, W.; Pan, Y.; Saadi, Y.; Schmitt, M.; Scott, I.; Sharma, V.; Turk, J.; Walsh, A.; Weber, F.; Wu, S.; Wu, X.; Yamartino, J.; Zheng, M.; Zobernig, G.

doi:10.1016/0370-2693(95)00758-D

The inclusive production of D*(+/-) mesons in photon-photon collisions has been measured by the Aleph experiment at LEP with a beam energy of 45 GeV. The D*(+) are detected in their decay to D-0 pi(+) with the D-0 observed in three separate decay modes: (1) K(-)pi(+), (2) K(-)pi(+)pi(0) and (3) K(-)pi(+)pi(-)pi(+), and analagously for the D*(-) modes. A total of 33 events was observed from an integrated luminosity of 73 pb(-1) which corresponds to a cross section for sigma(e(+)e(-) --> e(+)e(-)D*(+/-)X) of 155+/-33+/-21 pb, This result is compatible with both the direct production gamma gamma --> <c(c)over bar> in the Born approximation and with a more complete calculation which includes both radiative QCD corrections and contributions in which one of the photons is first resolved into its quark and gluon constituents. The shapes of distributions for events containing a D*(+) are found to be better described by the latter.

Measurement of the D∗± cross section in two photon collisions at LEP / D. Buskulic, D. Casper, I. Debonis, D. Decamp, P. Ghez, C. Goy, J. Lees, M. Minard, P. Odier, B. Pietrzyk, F. Ariztizabal, M. Chmeissani, J. Crespo, I. Efthymiopoulos, E. Fernandez, M. Fernandezbosman, V. Gaitan, L. Garrido, M. Martinez, S. Orteu, A. Pacheco, C. Padilla, F. Palla, A. Pascual, J. Perlas, F. Sanchez, F. Teubert, D. Creanza, M. Depalma, A. Farilla, G. Iaselli, G. Maggi, N. Marinelli, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, G. Bonvicini, M. Cattaneo, P. Comas, P. Coyle, H. Drevermann, A. Engelhardt, R. Forty, M. Frank, M. Girone, R. Hagelberg, J. Harvey, R. Jacobsen, P. Janot, B. Jost, J. Knobloch, I. Lehraus, M. Maggi, C. Markou, E. Martin, P. Mato, H. Meinhard, A. Minten, R. Miquel, T. Oest, P. Palazzi, J. Pater, P. Perrodo, J. Pusztaszeri, F. Ranjard, P. Rensing, L. Rolandi, D. Schlatter, M. Schmelling, O. Schneider, W. Tejessy, I. Tomalin, A. Venturi, H. Wachsmuth, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadinotwinowska, A. Barres, C. Boyer, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, J. Rossignol, F. Saadi, T. Fearnley, J. Hansen, J. Hansen, J. Hansen, P. Hansen, B. Nilsson, A. Kyriakis, E. Simopoulou, I. Siotis, A. Vayaki, K. Zachariadou, A. Blondel, G. Bonneaud, J. Brient, P. Bourdon, L. Passalacqua, A. Rouge, M. Rumpf, R. Tanaka, A. Valassi, M. Verderi, H. Videau, D. Candlin, M. Parsons, E. Focardi, G. Parrini, M. Corden, M. Delfino, C. Georgiopoulos, D. Jaffe, A. Antonelli, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, F. Cerutti, V. Chiarella, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. Murtas, M. Pepealtarelli, S. Dorris, A. Halley, I. Tenhave, I. Knowles, J. Lynch, W. Morton, V. Oshea, C. Raine, P. Reeves, J. Scarr, K. Smith, M. Smith, A. Thompson, F. Thomson, S. Thorn, R. Turnbull, U. Becker, O. Braun, C. Geweniger, G. Graefe, P. Hanke, V. Hepp, E. Kluge, A. Putzer, B. Rensch, M. Schmidt, J. Sommer, H. Stenzel, K. Tittel, S. Werner, M. Wunsch, R. Beuselinck, D. Binnie, W. Cameron, D. Colling, P. Dornan, N. Konstantinidis, L. Moneta, A. Moutoussi, J. Nash, G. Sanmartin, J. Sedgbeer, A. Stacey, G. Dissertori, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, C. Bowdery, T. Brodbeck, P. Colrain, G. Crawford, A. Finch, F. Foster, G. Hughes, T. Sloan, E. Whelan, M. Williams, A. Galla, A. Greene, K. Kleinknecht, G. Quast, J. Raab, B. Renk, H. Sander, R. Wanke, C. Zeitnitz, J. Aubert, A. Bencheikh, C. Benchouk, A. Bonissent, G. Bujosa, D. Calvet, J. Carr, C. Diaconu, F. Etienne, M. Thulasidas, D. Nicod, P. Payre, D. Rousseau, M. Talby, I. Abt, R. Assmann, C. Bauer, W. Blum, D. Brown, H. Dietl, F. Dydak, C. Gotzhein, K. Jakobs, H. Kroha, G. Lutjens, G. Lutz, W. Manner, H. Moser, R. Richter, A. Rosadoschlosser, R. Settles, H. Seywerd, U. Stierlin, R. Stdenis, G. Wolf, R. Alemany, J. Boucrot, O. Callot, A. Cordier, F. Courault, M. Davier, L. Duflot, J. Grivaz, P. Heusse, M. Jacquet, D. Kim, F. Lediberder, J. Lefrancois, A. Lutz, G. Musolino, I. Nikolic, H. Park, I. Park, M. Schune, S. Simion, J. Veillet, I. Videau, D. Abbaneo, P. Azzurri, G. Bagliesi, G. Batignani, S. Bettarini, C. Bozzi, G. Calderini, M. Carpinelli, M. Ciocci, V. Ciulli, R. Dellorso, R. Fantechi, I. Ferrante, L. Foa, F. Forti, A. Giassi, M. Giorgi, A. Gregorio, F. Ligabue, A. Lusiani, P. Marrocchesi, A. Messineo, G. Rizzo, G. Sanguinetti, A. Sciaba, P. Spagnolo, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini, P. Verdini, J. Walsh, A. Betteridge, G. Blair, L. Bryant, Y. Gao, M. Green, D. Johnson, T. Medcalf, L. Mir, J. Strong, V. Bertin, D. Botterill, R. Clifft, T. Edgecock, S. Haywood, M. Edwards, P. Maley, P. Norton, J. Thompson, B. Blochdevaux, P. Colas, H. Duarte, S. Emery, W. Kozanecki, E. Lancon, M. Lemaire, E. Locci, B. Marx, P. Perez, J. Rander, J. Renardy, A. Rosowsky, A. Roussarie, J. Schuller, J. Schwindling, D. Mohand, A. Trabelsi, B. Vallage, R. Johnson, H. Kim, A. Litke, M. Mcneil, G. Taylor, A. Beddall, C. Booth, R. Boswell, S. Cartwright, F. Combley, I. Dawson, A. Koksal, M. Letho, W. Newton, C. Rankin, L. Thompson, A. Bohrer, S. Brandt, G. Cowan, E. Feigl, C. Grupen, G. Lutters, J. Minguetrodriguez, F. Rivera, P. Saraiva, L. Smolik, F. Stephan, L. Bosisio, R. Dellamarina, G. Ganis, G. Giannini, B. Gobbo, L. Pitis, F. Ragusa, J. Rothberg, S. Wasserbaech, S. Armstrong, L. Bellantoni, P. Elmer, Z. Feng, D. Ferguson, Y. Gao, S. Gonzalez, J. Grahl, J. Harton, O. Hayes, H. Hu, P. Mcnamara, J. Nachtman, W. Orejudos, Y. Pan, Y. Saadi, M. Schmitt, I. Scott, V. Sharma, J. Turk, A. Walsh, F. Weber, S. Wu, X. Wu, J. Yamartino, M. Zheng, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 355:3/4(1995), pp. 595-605. [10.1016/0370-2693(95)00758-D]

Measurement of the D∗± cross section in two photon collisions at LEP

D. Buskulic;D. Casper;I. Debonis;D. Decamp;P. Ghez;C. Goy;J. Lees;M. Minard;P. Odier;B. Pietrzyk;F. Ariztizabal;M. Chmeissani;J. Crespo;I. Efthymiopoulos;E. Fernandez;M. Fernandezbosman;V. Gaitan;L. Garrido;M. Martinez;S. Orteu;A. Pacheco;C. Padilla;F. Palla;A. Pascual;J. Perlas;F. Sanchez;F. Teubert;D. Creanza;M. Depalma;A. Farilla;G. Iaselli;G. Maggi;N. Marinelli;S. Natali;S. Nuzzo;A. Ranieri;G. Raso;F. Romano;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;G. Zito;X. Huang;J. Lin;Q. Ouyang;T. Wang;Y. Xie;R. Xu;S. Xue;J. Zhang;L. Zhang;W. Zhao;G. Bonvicini;M. Cattaneo;P. Comas;P. Coyle;H. Drevermann;A. Engelhardt;R. Forty;M. Frank;M. Girone;R. Hagelberg;J. Harvey;R. Jacobsen;P. Janot;B. Jost;J. Knobloch;I. Lehraus;M. Maggi;C. Markou;E. Martin;P. Mato;H. Meinhard;A. Minten;R. Miquel;T. Oest;P. Palazzi;J. Pater;P. Perrodo;J. Pusztaszeri;F. Ranjard;P. Rensing;L. Rolandi;D. Schlatter;M. Schmelling;O. Schneider;W. Tejessy;I. Tomalin;A. Venturi;H. Wachsmuth;W. Wiedenmann;T. Wildish;W. Witzeling;J. Wotschack;Z. Ajaltouni;M. Bardadinotwinowska;A. Barres;C. Boyer;A. Falvard;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;S. Monteil;J. Montret;D. Pallin;P. Perret;F. Podlyski;J. Proriol;J. Rossignol;F. Saadi;T. Fearnley;J. Hansen;J. Hansen;J. Hansen;P. Hansen;B. Nilsson;A. Kyriakis;E. Simopoulou;I. Siotis;A. Vayaki;K. Zachariadou;A. Blondel;G. Bonneaud;J. Brient;P. Bourdon;L. Passalacqua;A. Rouge;M. Rumpf;R. Tanaka;A. Valassi;M. Verderi;H. Videau;D. Candlin;M. Parsons;E. Focardi;G. Parrini;M. Corden;M. Delfino;C. Georgiopoulos;D. Jaffe;A. Antonelli;G. Bencivenni;G. Bologna;F. Bossi;P. Campana;G. Capon;F. Cerutti;V. Chiarella;G. Felici;P. Laurelli;G. Mannocchi;F. Murtas;G. Murtas;M. Pepealtarelli;S. Dorris;A. Halley;I. Tenhave;I. Knowles;J. Lynch;W. Morton;V. Oshea;C. Raine;P. Reeves;J. Scarr;K. Smith;M. Smith;A. Thompson;F. Thomson;S. Thorn;R. Turnbull;U. Becker;O. Braun;C. Geweniger;G. Graefe;P. Hanke;V. Hepp;E. Kluge;A. Putzer;B. Rensch;M. Schmidt;J. Sommer;H. Stenzel;K. Tittel;S. Werner;M. Wunsch;R. Beuselinck;D. Binnie;W. Cameron;D. Colling;P. Dornan;N. Konstantinidis;L. Moneta;A. Moutoussi;J. Nash;G. Sanmartin;J. Sedgbeer;A. Stacey;G. Dissertori;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;C. Bowdery;T. Brodbeck;P. Colrain;G. Crawford;A. Finch;F. Foster;G. Hughes;T. Sloan;E. Whelan;M. Williams;A. Galla;A. Greene;K. Kleinknecht;G. Quast;J. Raab;B. Renk;H. Sander;R. Wanke;C. Zeitnitz;J. Aubert;A. Bencheikh;C. Benchouk;A. Bonissent;G. Bujosa;D. Calvet;J. Carr;C. Diaconu;F. Etienne;M. Thulasidas;D. Nicod;P. Payre;D. Rousseau;M. Talby;I. Abt;R. Assmann;C. Bauer;W. Blum;D. Brown;H. Dietl;F. Dydak;C. Gotzhein;K. Jakobs;H. Kroha;G. Lutjens;G. Lutz;W. Manner;H. Moser;R. Richter;A. Rosadoschlosser;R. Settles;H. Seywerd;U. Stierlin;R. Stdenis;G. Wolf;R. Alemany;J. Boucrot;O. Callot;A. Cordier;F. Courault;M. Davier;L. Duflot;J. Grivaz;P. Heusse;M. Jacquet;D. Kim;F. Lediberder;J. Lefrancois;A. Lutz;G. Musolino;I. Nikolic;H. Park;I. Park;M. Schune;S. Simion;J. Veillet;I. Videau;D. Abbaneo;P. Azzurri;G. Bagliesi;G. Batignani;S. Bettarini;C. Bozzi;G. Calderini;M. Carpinelli;M. Ciocci;V. Ciulli;R. Dellorso;R. Fantechi;I. Ferrante;L. Foa;F. Forti;A. Giassi;M. Giorgi;A. Gregorio;F. Ligabue;A. Lusiani;P. Marrocchesi;A. Messineo;G. Rizzo;G. Sanguinetti;A. Sciaba;P. Spagnolo;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;C. Vannini;P. Verdini;J. Walsh;A. Betteridge;G. Blair;L. Bryant;Y. Gao;M. Green;D. Johnson;T. Medcalf;L. Mir;J. Strong;V. Bertin;D. Botterill;R. Clifft;T. Edgecock;S. Haywood;M. Edwards;P. Maley;P. Norton;J. Thompson;B. Blochdevaux;P. Colas;H. Duarte;S. Emery;W. Kozanecki;E. Lancon;M. Lemaire;E. Locci;B. Marx;P. Perez;J. Rander;J. Renardy;A. Rosowsky;A. Roussarie;J. Schuller;J. Schwindling;D. Mohand;A. Trabelsi;B. Vallage;R. Johnson;H. Kim;A. Litke;M. Mcneil;G. Taylor;A. Beddall;C. Booth;R. Boswell;S. Cartwright;F. Combley;I. Dawson;A. Koksal;M. Letho;W. Newton;C. Rankin;L. Thompson;A. Bohrer;S. Brandt;G. Cowan;E. Feigl;C. Grupen;G. Lutters;J. Minguetrodriguez;F. Rivera;P. Saraiva;L. Smolik;F. Stephan;L. Bosisio;R. Dellamarina;G. Ganis;G. Giannini;B. Gobbo;L. Pitis;F. Ragusa;J. Rothberg;S. Wasserbaech;S. Armstrong;L. Bellantoni;P. Elmer;Z. Feng;D. Ferguson;Y. Gao;S. Gonzalez;J. Grahl;J. Harton;O. Hayes;H. Hu;P. Mcnamara;J. Nachtman;W. Orejudos;Y. Pan;Y. Saadi;M. Schmitt;I. Scott;V. Sharma;J. Turk;A. Walsh;F. Weber;S. Wu;X. Wu;J. Yamartino;M. Zheng;G. Zobernig

1995

Abstract

The inclusive production of D*(+/-) mesons in photon-photon collisions has been measured by the Aleph experiment at LEP with a beam energy of 45 GeV. The D*(+) are detected in their decay to D-0 pi(+) with the D-0 observed in three separate decay modes: (1) K(-)pi(+), (2) K(-)pi(+)pi(0) and (3) K(-)pi(+)pi(-)pi(+), and analagously for the D*(-) modes. A total of 33 events was observed from an integrated luminosity of 73 pb(-1) which corresponds to a cross section for sigma(e(+)e(-) --> e(+)e(-)D*(+/-)X) of 155+/-33+/-21 pb, This result is compatible with both the direct production gamma gamma --> in the Born approximation and with a more complete calculation which includes both radiative QCD corrections and contributions in which one of the photons is first resolved into its quark and gluon constituents. The shapes of distributions for events containing a D*(+) are found to be better described by the latter.

Scheda breve

Scheda completa

Scheda completa (DC)

	Settori scientifico-disciplinari dell'articolo
	
			Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
		
	Data di pubblicazione
	
			1995
		
	Rivista in ANCE
	
			PHYSICS LETTERS. SECTION B
		
	DOI
	
			https://dx.doi.org/10.1016/0370-2693(95)00758-D
		
	Tipologia
	
			Article (author)
		
	Appare nelle tipologie:
	
			01 - Articolo su periodico

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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/176765

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