Study of charm production in Z decays

Barate, R; Decamp, D; Ghez, P; Goy, C; Lees, Jp; Merle, E; Minard, Mn; Pietrzyk, B; Alemany, R; Casado, Mp; Chmeissani, M; Crespo, Jm; Fernandez, E; Fernandez Bosman, M; Garrido, L; Grauges, E; Juste, A; Martinez, M; Merino, G; Miquel, R; Mir, Lm; Pacheco, A; Park, Ic; Riu, I; Colaleo, A; Creanza, D; de Palma, M; Iaselli, G; Maggi, G; Maggi, M; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Tricomi, A; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Abbaneo, D; Becker, U; Boix, G; Cattaneo, M; Cerutti, F; Ciulli, V; Dissertori, G; Drevermann, H; Forty, Rw; Frank, M; Greening, Tc; Halley, Aw; Hansen, Jb; Harvey, J; Janot, P; Jost, B; Lehraus, I; Leroy, O; Mato, P; Minten, A; Moutoussi, A; Ranjard, F; Rolandi, L; Schlatter, D; Schmitt, M; Schneider, O; Spagnolo, P; Tejessy, W; Teubert, F; Tomalin, Ir; Tournefier, E; Wright, Ae; Ajaltouni, Z; Badaud, F; Chazelle, G; Deschamps, O; Falvard, A; Ferdi, C; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, Jc; Pallin, D; Perret, P; Podlyski, F; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Rensch, B; Waananen, A; Daskalakis, G; Kyriakis, A; Markou, C; Simopoulou, E; Siotis, I; Vayaki, A; Blondel, A; Bonneaud, G; Brient, Jc; Rouge, A; Rumpf, M; Swynghedauw, M; Verderi, M; Videau, H; Focardi, E; Parrini, G; Zachariadou, K; Cavanaugh, R; Corden, M; Georgiopoulos, C; Antonelli, A; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Chiarella, V; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Passalacqua, L; Pepe Altarelli, M; Curtis, L; Lynch, Jg; Negus, P; O'Shea, V; Raine, C; Teixeira Dias, P; Thompson, As; Buchmuller, O; Dhamotharan, S; Geweniger, C; Graefe, G; Hanke, P; Hansper, G; Hepp, V; Kluge, Ee; Putzer, A; Sommer, J; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Dornan, Pj; Girone, M; Goodsir, S; Martin, Eb; Marinelli, N; Sciaba, A; Sedgbeer, Jk; Thomson, E; Williams, Md; Ghete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bowdery, Ck; Buck, Pg; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Robertson, Na; Williams, Mi; Giehl, I; Jakobs, K; Kleinknecht, K; Quast, G; Renk, B; Rohne, E; Sander, Hg; Wachsmuth, H; Zeitnitz, C; Aubert, Jj; Benchouk, C; Bonissent, A; Carr, J; Coyle, P; Etienne, F; Motsch, F; Payre, P; Rousseau, D; Talby, M; Thulasidas, M; Aleppo, M; Antonelli, M; Ragusa, F; Buscher, V; Dietl, H; Ganis, G; Huttmann, K; Lutjens, G; Mannert, C; Manner, W; Moser, Hg; Schael, S; Settles, R; Seywerd, H; Stenzel, H; Wiedenmann, W; Wolf, G; Azzurri, P; Boucrot, J; Callot, O; Chen, S; Cordier, A; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Jacholkowska, A; Le Diberder, F; Lefrancois, J; Lutz, Am; Schune, Mh; Veillet, Jj; Videau, I; Zerwas, D; Bagliesi, G; Bettarini, Stefano; Boccali, T; Bozzi, C; Calderini, G; Dell'Orso, R; Ferrante, Isidoro; Foa, L; Giassi, A; Gregorio, A; Ligabue, F; Lusiani, A; Marrocchesi, Ps; Messineo, Alberto Maria; Palla, F; Rizzo, Giuliana; Sanguinetti, G; Sguazzoni, G; Tenchini, R; Vannini, C; Venturi, A; Verdini, Pg; Blair, Ga; Cowan, G; Green, Mg; Medcalf, T; Strong, Ja; von Wimmersperg Toeller JH,; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Norton, Pr; Thompson, Jc; Bloch Devaux, B; Colas, P; Emery, S; Kozanecki, W; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Rander, J; Renardy, Jf; Roussarie, A; Schuller, Jp; Schwindling, J; Trabelsi, A; Vallage, B; Black, Sn; Dann, Jh; Johnson, Rp; Kim, Hy; Konstantinidis, N; Litke, Am; McNeil, Ma; Taylor, G; Booth, Cn; Cartwright, S; Combley, F; Kelly, Ms; Lehto, H; Thompson, Lf; Affholderbach, K; Bohrer, A; Brandt, S; Grupen, C; Hess, J; Koob, C; Misiejuk, A; Prange, G; Sieler, U; Giannini, G; Gobbo, B; Rothberg, J; Wasserbaech, S; Armstrong, Sr; Elmer, P; Ferguson, Dps; Gao, Y; Gonzalez, S; Hayes, Oj; Hu, H; Jin, S; McNamara, Pa; Nielsen, J; Orejudos, W; Pan, Yb; Saadi, Y; Scott, Ij; Walsh, J; Wu, Sl; Wu, X; Zobernig, G.

doi:10.1007/s100520000421

The production rates of D*+/- D-s(*+/-), D+/-, D-0/(D) over bar(0), D-s(+/-), and Lambda(c)(+)/<(Lambda)over bar>(-)(c) in Z --> c (c) over bar decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D*+/- is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D*+ is found to be f(c --> D*+) = 0.233 +/- 0.010(stat.) +/- 0.011(syst.). The average fraction of the beam energy carried by D*+/- mesons in Z --> c (c) over bar events is measured to be (X-E(D*+/-))(c (c) over bar) = 0.4878 +/- 0.0046(stat.) +/- 0.0061(syst.). The D*+/- energy and the hemisphere mass imbalance distributions are simultaneously used to measure the fraction of hadronic Z decays in which a gluon splits to a c (c) over bar pair: (n) over bar(g --> c (c) over bar) = (3.23 +/- 0.48(stat.) +/- 0.53(syst.))%. The ratio of the Vector/(Vector+Pseudoscalar) production rates in charmed mesons is found to be P-V = 0.595 +/- 0.045. The fractional decay width of the Z into cc pairs is determined from the sum of the production rates for various weakly decaying charmed states to be R-c = 0.1738 +/- 0.0047(stat.) +/- 0.0116(syst.).

Autori interni:	Barate R Decamp D Ghez P Goy C Lees JP Merle E Minard MN Pietrzyk B Alemany R Casado MP Chmeissani M Crespo JM Fernandez E Fernandez Bosman M Garrido L Grauges E Juste A Martinez M Merino G Miquel R Mir LM Pacheco A Park IC Riu I Colaleo A Creanza D de Palma M Iaselli G Maggi G Maggi M Nuzzo S Ranieri A Raso G Ruggieri F Selvaggi G Silvestris L Tempesta P Tricomi A Zito G Huang X Lin J Ouyang Q Wang T Xie Y Xu R Xue S Zhang J Zhang L Zhao W Abbaneo D Becker U Boix G Cattaneo M Cerutti F Ciulli V Dissertori G Drevermann H Forty RW Frank M Greening TC Halley AW Hansen JB Harvey J Janot P Jost B Lehraus I Leroy O Mato P Minten A Moutoussi A Ranjard F Rolandi L Schlatter D Schmitt M Schneider O Spagnolo P Tejessy W Teubert F Tomalin IR Tournefier E Wright AE Ajaltouni Z Badaud F Chazelle G Deschamps O Falvard A Ferdi C Gay P Guicheney C Henrard P Jousset J Michel B Monteil S Montret JC Pallin D Perret P Podlyski F Hansen JD Hansen JR Hansen PH Nilsson BS Rensch B Waananen A Daskalakis G Kyriakis A Markou C Simopoulou E Siotis I Vayaki A Blondel A Bonneaud G Brient JC Rouge A Rumpf M Swynghedauw M Verderi M Videau H Focardi E Parrini G Zachariadou K Cavanaugh R Corden M Georgiopoulos C Antonelli A Bencivenni G Bologna G Bossi F Campana P Capon G Chiarella V Laurelli P Mannocchi G Murtas F Murtas GP Passalacqua L Pepe Altarelli M Curtis L Lynch JG Negus P O'Shea V Raine C Teixeira Dias P Thompson AS Buchmuller O Dhamotharan S Geweniger C Graefe G Hanke P Hansper G Hepp V Kluge EE Putzer A Sommer J Tittel K Werner S Wunsch M Beuselinck R Binnie DM Cameron W Dornan PJ Girone M Goodsir S Martin EB Marinelli N Sciaba A Sedgbeer JK Thomson E Williams MD Ghete VM Girtler P Kneringer E Kuhn D Rudolph G Bowdery CK Buck PG Finch AJ Foster F Hughes G Jones RWL Robertson NA Williams MI Giehl I Jakobs K Kleinknecht K Quast G Renk B Rohne E Sander HG Wachsmuth H Zeitnitz C Aubert JJ Benchouk C Bonissent A Carr J Coyle P Etienne F Motsch F Payre P Rousseau D Talby M Thulasidas M Aleppo M Antonelli M Ragusa F Buscher V Dietl H Ganis G Huttmann K Lutjens G Mannert C Manner W Moser HG Schael S Settles R Seywerd H Stenzel H Wiedenmann W Wolf G Azzurri P Boucrot J Callot O Chen S Cordier A Davier M Duflot L Grivaz JF Heusse P Jacholkowska A Le Diberder F Lefrancois J Lutz AM Schune MH Veillet JJ Videau I Zerwas D Bagliesi G BETTARINI, STEFANO Boccali T Bozzi C Calderini G Dell'Orso R FERRANTE, ISIDORO Foa L Giassi A Gregorio A Ligabue F Lusiani A Marrocchesi PS MESSINEO, ALBERTO MARIA Palla F RIZZO, GIULIANA Sanguinetti G Sguazzoni G Tenchini R Vannini C Venturi A Verdini PG Blair GA Cowan G Green MG Medcalf T Strong JA von Wimmersperg Toeller JH Botterill DR Clifft RW Edgecock TR Norton PR Thompson JC Bloch Devaux B Colas P Emery S Kozanecki W Lancon E Lemaire MC Locci E Perez P Rander J Renardy JF Roussarie A Schuller JP Schwindling J Trabelsi A Vallage B Black SN Dann JH Johnson RP Kim HY Konstantinidis N Litke AM McNeil MA Taylor G Booth CN Cartwright S Combley F Kelly MS Lehto H Thompson LF Affholderbach K Bohrer A Brandt S Grupen C Hess J Koob C Misiejuk A Prange G Sieler U Giannini G Gobbo B Rothberg J Wasserbaech S Armstrong SR Elmer P Ferguson DPS Gao Y Gonzalez S Hayes OJ Hu H Jin S McNamara PA Nielsen J Orejudos W Pan YB Saadi Y Scott IJ Walsh J Wu SL Wu X Zobernig G. mostra contributor esterni nascondi contributor esterni
Autori:	Barate R; Decamp D; Ghez P; Goy C; Lees JP; Merle E; Minard MN; Pietrzyk B; Alemany R; Casado MP; Chmeissani M; Crespo JM; Fernandez E; Fernandez-Bosman M; Garrido L; Grauges E; Juste A; Martinez M; Merino G; Miquel R; Mir LM; Pacheco A; Park IC; Riu I; Colaleo A; Creanza D; de Palma M; Iaselli G; Maggi G; Maggi M; Nuzzo S; Ranieri A; Raso G; Ruggieri F; Selvaggi G; Silvestris L; Tempesta P; Tricomi A; Zito G; Huang X; Lin J; Ouyang Q; Wang T; Xie Y; Xu R; Xue S; Zhang J; Zhang L; Zhao W; Abbaneo D; Becker U; Boix G; Cattaneo M; Cerutti F; Ciulli V; Dissertori G; Drevermann H; Forty RW; Frank M; Greening TC; Halley AW; Hansen JB; Harvey J; Janot P; Jost B; Lehraus I; Leroy O; Mato P; Minten A; Moutoussi A; Ranjard F; Rolandi L; Schlatter D; Schmitt M; Schneider O; Spagnolo P; Tejessy W; Teubert F; Tomalin IR; Tournefier E; Wright AE; Ajaltouni Z; Badaud F; Chazelle G; Deschamps O; Falvard A; Ferdi C; Gay P; Guicheney C; Henrard P; Jousset J; Michel B; Monteil S; Montret JC; Pallin D; Perret P; Podlyski F; Hansen JD; Hansen JR; Hansen PH; Nilsson BS; Rensch B; Waananen A; Daskalakis G; Kyriakis A; Markou C; Simopoulou E; Siotis I; Vayaki A; Blondel A; Bonneaud G; Brient JC; Rouge A; Rumpf M; Swynghedauw M; Verderi M; Videau H; Focardi E; Parrini G; Zachariadou K; Cavanaugh R; Corden M; Georgiopoulos C; Antonelli A; Bencivenni G; Bologna G; Bossi F; Campana P; Capon G; Chiarella V; Laurelli P; Mannocchi G; Murtas F; Murtas GP; Passalacqua L; Pepe-Altarelli M; Curtis L; Lynch JG; Negus P; O'Shea V; Raine C; Teixeira-Dias P; Thompson AS; Buchmuller O; Dhamotharan S; Geweniger C; Graefe G; Hanke P; Hansper G; Hepp V; Kluge EE; Putzer A; Sommer J; Tittel K; Werner S; Wunsch M; Beuselinck R; Binnie DM; Cameron W; Dornan PJ; Girone M; Goodsir S; Martin EB; Marinelli N; Sciaba A; Sedgbeer JK; Thomson E; Williams MD; Ghete VM; Girtler P; Kneringer E; Kuhn D; Rudolph G; Bowdery CK; Buck PG; Finch AJ; Foster F; Hughes G; Jones RWL; Robertson NA; Williams MI; Giehl I; Jakobs K; Kleinknecht K; Quast G; Renk B; Rohne E; Sander HG; Wachsmuth H; Zeitnitz C; Aubert JJ; Benchouk C; Bonissent A; Carr J; Coyle P; Etienne F; Motsch F; Payre P; Rousseau D; Talby M; Thulasidas M; Aleppo M; Antonelli M; Ragusa F; Buscher V; Dietl H; Ganis G; Huttmann K; Lutjens G; Mannert C; Manner W; Moser HG; Schael S; Settles R; Seywerd H; Stenzel H; Wiedenmann W; Wolf G; Azzurri P; Boucrot J; Callot O; Chen S; Cordier A; Davier M; Duflot L; Grivaz JF; Heusse P; Jacholkowska A; Le Diberder F; Lefrancois J; Lutz AM; Schune MH; Veillet JJ; Videau I; Zerwas D; Bagliesi G; Bettarini S; Boccali T; Bozzi C; Calderini G; Dell'Orso R; Ferrante I; Foa L; Giassi A; Gregorio A; Ligabue F; Lusiani A; Marrocchesi PS; Messineo A; Palla F; Rizzo G; Sanguinetti G; Sguazzoni G; Tenchini R; Vannini C; Venturi A; Verdini PG; Blair GA; Cowan G; Green MG; Medcalf T; Strong JA; von Wimmersperg-Toeller JH; Botterill DR; Clifft RW; Edgecock TR; Norton PR; Thompson JC; Bloch-Devaux B; Colas P; Emery S; Kozanecki W; Lancon E; Lemaire MC; Locci E; Perez P; Rander J; Renardy JF; Roussarie A; Schuller JP; Schwindling J; Trabelsi A; Vallage B; Black SN; Dann JH; Johnson RP; Kim HY; Konstantinidis N; Litke AM; McNeil MA; Taylor G; Booth CN; Cartwright S; Combley F; Kelly MS; Lehto H; Thompson LF; Affholderbach K; Bohrer A; Brandt S; Grupen C; Hess J; Koob C; Misiejuk A; Prange G; Sieler U; Giannini G; Gobbo B; Rothberg J; Wasserbaech S; Armstrong SR; Elmer P; Ferguson DPS; Gao Y; Gonzalez S; Hayes OJ; Hu H; Jin S; McNamara PA; Nielsen J; Orejudos W; Pan YB; Saadi Y; Scott IJ; Walsh J; Wu SL; Wu X; Zobernig G
Titolo:	Study of charm production in Z decays
Anno del prodotto:	2000
Digital Object Identifier (DOI):	10.1007/s100520000421
Appare nelle tipologie:	1.1 Articolo in rivista

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