The inclusive charm production rate in W decays is measured from a study of the properties of final state particles. The sample of W pairs is selected from 67.7 pb(-1) collected by ALEPH in 1996 and 1997 at centre-of-mass energies near 172 and 183 GeV in the channels W+W- --> 4q and W+W- --> l <nu q(q)over bar>. The branching fraction of hadronic W decays to a final state containing a c quark, R-c(W) = Gamma(W --> hadrons), is measured to be 0.51 +/- 0.05(stat) +/- 0.03(syst). This allows a direct determination of the CKM matrix element \V-cs\ = 1.00 +/- 0.11(stat) +/- 0.07(syst).

A direct measurement of |Vcs| in hadronic W decays using a charm tag / Barate, R; Decamp, D; Ghez, P; Goy, C; Jezequel, S; Lees, Jp; Martin, F; Merle, E; Minard, Mn; Pietrzyk, B; Alemany, R; Bravo, S; 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; Morawitz, P; Pacheco, A; Riu, I; Ruiz, H; Colaleo, A; Creanza, Donato Maria; de Palma, M; Iaselli, Giuseppe; Maggi, Giorgio Pietro; Maggi, M; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, F; 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; Buchmuller, O; Cattaneo, M; Cerutti, F; Ciulli, V; Dissertori, G; Drevermann, H; Forty, Rw; Frank, M; Gianotti, F; Greening, Tc; Halley, Aw; Hansen, Jb; Harvey, J; Janot, P; Jost, B; Lehraus, I; Leroy, O; Maley, P; Mato, P; Minten, A; Moutoussi, A; Ranjard, F; Rolandi, L; Schlatter, D; Schmitt, M; Schneider, O; Spagnolo, P; Tejessy, W; Teubert, F; Tournefier, E; Wright, Ae; Ajaltouni, Z; Badaud, F; Chazelle, G; Deschamps, O; Dessagne, S; 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; Vayaki, A; Blondel, A; Brient, Jc; Machefert, F; Rouge, A; Swynghedauw, H; Tanaka, R; Valassi, A; Videau, H; Focardi, E; Parrini, G; Zachariadou, K; 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; Chalmers, M; Curtis, L; Lynch, Jg; Negus, P; O'Shea, V; Raeven, B; Raine, C; Smith, D; Teixeira Dias, P; Thompson, As; Ward, Jj; Cavanaugh, R; Dhamotharan, S; Geweniger, C; Hanke, P; Hepp, V; Kluge, Ee; Putzer, A; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Dornan, Pj; Girone, M; Goodsir, S; Marinelli, N; Martin, Eb; Nash, J; Nowell, J; Przysiezniak, H; Sciaba, A; Sedgbeer, Jk; Thomson, E; Williams, Md; Ghete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bowdery, Ck; Buck, Pg; Ellis, G; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Robertson, Na; Smizanska, M; Williams, Mi; Giehl, I; Holldorfer, F; Jakobs, K; Kleinknecht, K; Krocker, M; Muller, As; Nurnberger, Ha; Quast, G; Renk, B; Rohne, E; Sander, Hg; Schmeling, S; Wachsmuth, H; Zeitnitz, C; Ziegler, T; Aubert, Jj; Bonissent, A; Carr, J; Coyle, P; Ealet, A; Fouchez, D; Tilquin, A; Aleppo, M; Antonelli, M; Gilardoni, S; 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; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Jacholkowska, A; Kado, M; Lefrancois, J; Serin, L; Veillet, Jj; Videau, I; de Regie, Jbd; Zerwas, D; Bagliesi, G; Boccali, T; Bozzi, C; Calderini, G; Dell'Orso, R; Ferrante, I; Giassi, A; Gregorio, A; Ligabue, F; Marrocchesi, Ps; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Sguazzoni, G; Tenchini, R; Venturi, A; Verdini, Pg; Blair, Ga; Coles, J; Cowan, G; Green, Mg; Hutchcroft, De; Jones, Lt; Medcalf, T; Strong, Ja; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Norton, Pr; Thompson, Jc; Tomalin, Ir; Bloch Devaux, B; Colas, P; Fabbro, B; Faif, G; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Rander, J; Renardy, Jf; Rosowsky, A; Saeger, P; Trabelsi, A; Tuchming, B; Vallage, B; Black, Sn; Dann, Jh; Loomis, G; Kim, Hy; Konstantinidis, N; Litke, Am; Mcneil, Ma; Taylor, G; Booth, Cn; Cartwright, S; Combley, F; Hodgson, Pn; Lehto, M; Thompson, Lf; Affholderbach, K; Bohrer, A; Brandt, S; Grupen, C; Hess, J; Misiejuk, A; Prange, G; Sieler, U; Giannini, G; Gobbo, B; Putz, J; Rothberg, J; Wasserbaech, S; Williams, Rw; Armstrong, Sr; Elmer, P; Ferguson, Dps; Gao, Y; Gonzalez, S; Hayes, Oj; H, Hu; Jin, S; Kile, J; Mcnamara, Pa; Nielsen, J; Orejudos, W; Pan, Yb; Saadi, Y; Scott, Ij; Walsh, J; von Wimmersperg Toeller, Jh; Wu, Sl; Wu, X; Zobernig, G.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 465:1-4(1999), pp. 349-362. [10.1016/S0370-2693(99)01088-6]

A direct measurement of |Vcs| in hadronic W decays using a charm tag

CREANZA, Donato Maria;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1999-01-01

Abstract

The inclusive charm production rate in W decays is measured from a study of the properties of final state particles. The sample of W pairs is selected from 67.7 pb(-1) collected by ALEPH in 1996 and 1997 at centre-of-mass energies near 172 and 183 GeV in the channels W+W- --> 4q and W+W- --> l . The branching fraction of hadronic W decays to a final state containing a c quark, R-c(W) = Gamma(W --> hadrons), is measured to be 0.51 +/- 0.05(stat) +/- 0.03(syst). This allows a direct determination of the CKM matrix element \V-cs\ = 1.00 +/- 0.11(stat) +/- 0.07(syst).
1999
A direct measurement of |Vcs| in hadronic W decays using a charm tag / Barate, R; Decamp, D; Ghez, P; Goy, C; Jezequel, S; Lees, Jp; Martin, F; Merle, E; Minard, Mn; Pietrzyk, B; Alemany, R; Bravo, S; 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; Morawitz, P; Pacheco, A; Riu, I; Ruiz, H; Colaleo, A; Creanza, Donato Maria; de Palma, M; Iaselli, Giuseppe; Maggi, Giorgio Pietro; Maggi, M; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, F; 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; Buchmuller, O; Cattaneo, M; Cerutti, F; Ciulli, V; Dissertori, G; Drevermann, H; Forty, Rw; Frank, M; Gianotti, F; Greening, Tc; Halley, Aw; Hansen, Jb; Harvey, J; Janot, P; Jost, B; Lehraus, I; Leroy, O; Maley, P; Mato, P; Minten, A; Moutoussi, A; Ranjard, F; Rolandi, L; Schlatter, D; Schmitt, M; Schneider, O; Spagnolo, P; Tejessy, W; Teubert, F; Tournefier, E; Wright, Ae; Ajaltouni, Z; Badaud, F; Chazelle, G; Deschamps, O; Dessagne, S; 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; Vayaki, A; Blondel, A; Brient, Jc; Machefert, F; Rouge, A; Swynghedauw, H; Tanaka, R; Valassi, A; Videau, H; Focardi, E; Parrini, G; Zachariadou, K; 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; Chalmers, M; Curtis, L; Lynch, Jg; Negus, P; O'Shea, V; Raeven, B; Raine, C; Smith, D; Teixeira Dias, P; Thompson, As; Ward, Jj; Cavanaugh, R; Dhamotharan, S; Geweniger, C; Hanke, P; Hepp, V; Kluge, Ee; Putzer, A; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Dornan, Pj; Girone, M; Goodsir, S; Marinelli, N; Martin, Eb; Nash, J; Nowell, J; Przysiezniak, H; Sciaba, A; Sedgbeer, Jk; Thomson, E; Williams, Md; Ghete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bowdery, Ck; Buck, Pg; Ellis, G; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Robertson, Na; Smizanska, M; Williams, Mi; Giehl, I; Holldorfer, F; Jakobs, K; Kleinknecht, K; Krocker, M; Muller, As; Nurnberger, Ha; Quast, G; Renk, B; Rohne, E; Sander, Hg; Schmeling, S; Wachsmuth, H; Zeitnitz, C; Ziegler, T; Aubert, Jj; Bonissent, A; Carr, J; Coyle, P; Ealet, A; Fouchez, D; Tilquin, A; Aleppo, M; Antonelli, M; Gilardoni, S; 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; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Jacholkowska, A; Kado, M; Lefrancois, J; Serin, L; Veillet, Jj; Videau, I; de Regie, Jbd; Zerwas, D; Bagliesi, G; Boccali, T; Bozzi, C; Calderini, G; Dell'Orso, R; Ferrante, I; Giassi, A; Gregorio, A; Ligabue, F; Marrocchesi, Ps; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Sguazzoni, G; Tenchini, R; Venturi, A; Verdini, Pg; Blair, Ga; Coles, J; Cowan, G; Green, Mg; Hutchcroft, De; Jones, Lt; Medcalf, T; Strong, Ja; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Norton, Pr; Thompson, Jc; Tomalin, Ir; Bloch Devaux, B; Colas, P; Fabbro, B; Faif, G; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Rander, J; Renardy, Jf; Rosowsky, A; Saeger, P; Trabelsi, A; Tuchming, B; Vallage, B; Black, Sn; Dann, Jh; Loomis, G; Kim, Hy; Konstantinidis, N; Litke, Am; Mcneil, Ma; Taylor, G; Booth, Cn; Cartwright, S; Combley, F; Hodgson, Pn; Lehto, M; Thompson, Lf; Affholderbach, K; Bohrer, A; Brandt, S; Grupen, C; Hess, J; Misiejuk, A; Prange, G; Sieler, U; Giannini, G; Gobbo, B; Putz, J; Rothberg, J; Wasserbaech, S; Williams, Rw; Armstrong, Sr; Elmer, P; Ferguson, Dps; Gao, Y; Gonzalez, S; Hayes, Oj; H, Hu; Jin, S; Kile, J; Mcnamara, Pa; Nielsen, J; Orejudos, W; Pan, Yb; Saadi, Y; Scott, Ij; Walsh, J; von Wimmersperg Toeller, Jh; Wu, Sl; Wu, X; Zobernig, G.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 465:1-4(1999), pp. 349-362. [10.1016/S0370-2693(99)01088-6]
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