A direct measurement of vertical bar V-cs vertical bar in hadronic W decays using a charm tag

Barate, R.; Decamp, D.; Ghez, P.; Goy, C.; Jezequel, S.; Lees, J.; Martin, F.; Merle, E.; Minard, M.; Pietrzyk, B.; Alemany, R.; Bravo, S.; Casado, M.; Chmeissani, M.; Crespo, J.; Fernandez, E.; Fernandez Bosman, M.; Garrido, L.; Grauges, E.; Juste, A.; Martinez, M.; Merino, G.; Miquel, R.; Mir, L.; Morawitz, P.; Pacheco, A.; Riu, I.; Ruiz, H.; 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, 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, R.; Frank, M.; Gianotti, F.; Greening, T.; Halley, A.; Hansen, J.; 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, A.; 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, J.; Pallin, D.; Perret, P.; Podlyski, F.; Hansen, J.; Hansen, J.; Hansen, P.; Nilsson, B.; Rensch, B.; Waananen, A.; Daskalakis, G.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Blondel, A.; Brient, J.; 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, G.; Passalacqua, L.; Pepe Altarelli, M.; Chalmers, M.; Curtis, L.; Lynch, J.; Negus, P.; O'Shea, V.; Raeven, B.; Raine, C.; Smith, D.; Teixeira Dias, P.; Thompson, A.; Ward, J.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E.; Putzer, A.; Tittel, K.; Werner, S.; Wunsch, M.; Beuselinck, R.; Binnie, D.; Cameron, W.; Dornan, P.; Girone, M.; Goodsir, S.; Marinelli, N.; Martin, E.; Nash, J.; Nowell, J.; Przysiezniak, H.; Sciaba, A.; Sedgbeer, J.; Thomson, E.; Williams, M.; Ghete, V.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bowdery, C.; Buck, P.; Ellis, G.; Finch, A.; Foster, F.; Hughes, G.; Jones, R.; Robertson, N.; Smizanska, M.; Williams, M.; Giehl, I.; Holldorfer, F.; Jakobs, K.; Kleinknecht, K.; Krocker, M.; Muller, A.; Nurnberger, H.; Quast, G.; Renk, B.; Rohne, E.; Sander, H.; Schmeling, S.; Wachsmuth, H.; Zeitnitz, C.; Ziegler, T.; Aubert, J.; Bonissent, A.; Carr, J.; Coyle, P.; Ealet, A.; Fouchez, D.; Tilquin, A.; Aleppo, M.R.A.; Antonelli, M.; Gilardoni, S.; Ragusa, F.; Buscher, V.; Dietl, H.; Ganis, G.; Huttmann, K.; Lutjens, G.; Mannert, C.; Manner, W.; Moser, H.; 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, J.; Heusse, P.; Jacholkowska, A.; Kado, M.; Lefrancois, J.; Serin, L.; Veillet, J.; Videau, I.; de Regie, J.; Zerwas, D.; Bagliesi, G.; Boccali, T.; Bozzi, C.; Calderini, G.; Dell'Orso, R.; Ferrante, I.; Giassi, A.; Gregorio, A.; Ligabue, F.; Marrocchesi, P.; Messineo, A.; Palla, F.; Rizzo, G.; Sanguinetti, G.; Sguazzoni, G.; Tenchini, R.; Venturi, A.; Verdini, P.; Blair, G.; Coles, J.; Cowan, G.; Green, M.; Hutchcroft, D.; Jones, L.; Medcalf, T.; Strong, J.; Botterill, D.; Clifft, R.; Edgecock, T.; Norton, P.; Thompson, J.; Tomalin, I.; Bloch Devaux, B.; Colas, P.; Fabbro, B.; Faif, G.; Lancon, E.; Lemaire, M.; Locci, E.; Perez, P.; Rander, J.; Renardy, J.; Rosowsky, A.; Saeger, P.; Trabelsi, A.; Tuchming, B.; Vallage, B.; Black, S.; Dann, J.; Loomis, G.; Kim, H.; Konstantinidis, N.; Litke, A.; Mcneil, M.; Taylor, G.; Booth, C.; Cartwright, S.; Combley, F.; Hodgson, P.; Lehto, M.; Thompson, L.; 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, R.; Armstrong, S.; Elmer, P.; Ferguson, D.; Gao, Y.; Gonzalez, S.; Hayes, O.; Hu, H.; Jin, S.; Kile, J.; Mcnamara, P.; Nielsen, J.; Orejudos, W.; Pan, Y.; Saadi, Y.; Scott, I.; Walsh, J.; von Wimmersperg Toeller, J.; Wu, S.; Wu, X.; Zobernig, G.

doi:10.1016/S0370-2693(99)01088-6

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 vertical bar V-cs vertical bar in hadronic W decays using a charm tag / R. Barate, D. Decamp, P. Ghez, C. Goy, S. Jezequel, J. Lees, F. Martin, E. Merle, M. Minard, B. Pietrzyk, R. Alemany, S. Bravo, M. Casado, M. Chmeissani, J. Crespo, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Grauges, A. Juste, M. Martinez, G. Merino, R. Miquel, L. Mir, P. Morawitz, A. Pacheco, I. Riu, H. Ruiz, A. Colaleo, D. Creanza, M. de Palma, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, F. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, U. Becker, G. Boix, O. Buchmuller, M. Cattaneo, F. Cerutti, V. Ciulli, G. Dissertori, H. Drevermann, R. Forty, M. Frank, F. Gianotti, T. Greening, A. Halley, J. Hansen, J. Harvey, P. Janot, B. Jost, I. Lehraus, O. Leroy, P. Maley, P. Mato, A. Minten, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, M. Schmitt, O. Schneider, P. Spagnolo, W. Tejessy, F. Teubert, E. Tournefier, A. Wright, Z. Ajaltouni, F. Badaud, G. Chazelle, O. Deschamps, S. Dessagne, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. Montret, D. Pallin, P. Perret, F. Podlyski, J. Hansen, J. Hansen, P. Hansen, B. Nilsson, B. Rensch, A. Waananen, G. Daskalakis, A. Kyriakis, C. Markou, E. Simopoulou, A. Vayaki, A. Blondel, J. Brient, F. Machefert, A. Rouge, H. Swynghedauw, R. Tanaka, A. Valassi, H. Videau, E. Focardi, G. Parrini, K. Zachariadou, M. Corden, C. Georgiopoulos, A. Antonelli, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, P. Laurelli, G. Mannocchi, F. Murtas, G. Murtas, L. Passalacqua, M. Pepe-Altarelli, M. Chalmers, L. Curtis, J. Lynch, P. Negus, V. O'Shea, B. Raeven, C. Raine, D. Smith, P. Teixeira-Dias, A. Thompson, J. Ward, R. Cavanaugh, S. Dhamotharan, C. Geweniger, P. Hanke, V. Hepp, E. Kluge, A. Putzer, K. Tittel, S. Werner, M. Wunsch, R. Beuselinck, D. Binnie, W. Cameron, P. Dornan, M. Girone, S. Goodsir, N. Marinelli, E. Martin, J. Nash, J. Nowell, H. Przysiezniak, A. Sciaba, J. Sedgbeer, E. Thomson, M. Williams, V. Ghete, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, C. Bowdery, P. Buck, G. Ellis, A. Finch, F. Foster, G. Hughes, R. Jones, N. Robertson, M. Smizanska, M. Williams, I. Giehl, F. Holldorfer, K. Jakobs, K. Kleinknecht, M. Krocker, A. Muller, H. Nurnberger, G. Quast, B. Renk, E. Rohne, H. Sander, S. Schmeling, H. Wachsmuth, C. Zeitnitz, T. Ziegler, J. Aubert, A. Bonissent, J. Carr, P. Coyle, A. Ealet, D. Fouchez, A. Tilquin, M.R.A. Aleppo, M. Antonelli, S. Gilardoni, F. Ragusa, V. Buscher, H. Dietl, G. Ganis, K. Huttmann, G. Lutjens, C. Mannert, W. Manner, H. Moser, S. Schael, R. Settles, H. Seywerd, H. Stenzel, W. Wiedenmann, G. Wolf, P. Azzurri, J. Boucrot, O. Callot, S. Chen, M. Davier, L. Duflot, J. Grivaz, P. Heusse, A. Jacholkowska, M. Kado, J. Lefrancois, L. Serin, J. Veillet, I. Videau, J. de Regie, D. Zerwas, G. Bagliesi, T. Boccali, C. Bozzi, G. Calderini, R. Dell'Orso, I. Ferrante, A. Giassi, A. Gregorio, F. Ligabue, P. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, G. Sguazzoni, R. Tenchini, A. Venturi, P. Verdini, G. Blair, J. Coles, G. Cowan, M. Green, D. Hutchcroft, L. Jones, T. Medcalf, J. Strong, D. Botterill, R. Clifft, T. Edgecock, P. Norton, J. Thompson, I. Tomalin, B. Bloch-Devaux, P. Colas, B. Fabbro, G. Faif, E. Lancon, M. Lemaire, E. Locci, P. Perez, J. Rander, J. Renardy, A. Rosowsky, P. Saeger, A. Trabelsi, B. Tuchming, B. Vallage, S. Black, J. Dann, G. Loomis, H. Kim, N. Konstantinidis, A. Litke, M. McNeil, G. Taylor, C. Booth, S. Cartwright, F. Combley, P. Hodgson, M. Lehto, L. Thompson, K. Affholderbach, A. Bohrer, S. Brandt, C. Grupen, J. Hess, A. Misiejuk, G. Prange, U. Sieler, G. Giannini, B. Gobbo, J. Putz, J. Rothberg, S. Wasserbaech, R. Williams, S. Armstrong, P. Elmer, D. Ferguson, Y. Gao, S. Gonzalez, O. Hayes, H. Hu, S. Jin, J. Kile, P. McNamara, J. Nielsen, W. Orejudos, Y. Pan, Y. Saadi, I. Scott, J. Walsh, J. von Wimmersperg-Toeller, S. Wu, X. Wu, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 465:1/4(1999), pp. 349-362.

A direct measurement of vertical bar V-cs vertical bar in hadronic W decays using a charm tag

R. Barate;D. Decamp;P. Ghez;C. Goy;S. Jezequel;J. Lees;F. Martin;E. Merle;M. Minard;B. Pietrzyk;R. Alemany;S. Bravo;M. Casado;M. Chmeissani;J. Crespo;E. Fernandez;M. Fernandez Bosman;L. Garrido;E. Grauges;A. Juste;M. Martinez;G. Merino;R. Miquel;L. Mir;P. Morawitz;A. Pacheco;I. Riu;H. Ruiz;A. Colaleo;D. Creanza;M. de Palma;G. Iaselli;G. Maggi;M. Maggi;S. Nuzzo;A. Ranieri;G. Raso;F. Ruggieri;G. Selvaggi;L. Silvestris;F. Tempesta;A. Tricomi;G. Zito;X. Huang;J. Lin;Q. Ouyang;T. Wang;Y. Xie;R. Xu;S. Xue;J. Zhang;L. Zhang;W. Zhao;D. Abbaneo;U. Becker;G. Boix;O. Buchmuller;M. Cattaneo;F. Cerutti;V. Ciulli;G. Dissertori;H. Drevermann;R. Forty;M. Frank;F. Gianotti;T. Greening;A. Halley;J. Hansen;J. Harvey;P. Janot;B. Jost;I. Lehraus;O. Leroy;P. Maley;P. Mato;A. Minten;A. Moutoussi;F. Ranjard;L. Rolandi;D. Schlatter;M. Schmitt;O. Schneider;P. Spagnolo;W. Tejessy;F. Teubert;E. Tournefier;A. Wright;Z. Ajaltouni;F. Badaud;G. Chazelle;O. Deschamps;S. Dessagne;A. Falvard;C. Ferdi;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;S. Monteil;J. Montret;D. Pallin;P. Perret;F. Podlyski;J. Hansen;J. Hansen;P. Hansen;B. Nilsson;B. Rensch;A. Waananen;G. Daskalakis;A. Kyriakis;C. Markou;E. Simopoulou;A. Vayaki;A. Blondel;J. Brient;F. Machefert;A. Rouge;H. Swynghedauw;R. Tanaka;A. Valassi;H. Videau;E. Focardi;G. Parrini;K. Zachariadou;M. Corden;C. Georgiopoulos;A. Antonelli;G. Bencivenni;G. Bologna;F. Bossi;P. Campana;G. Capon;V. Chiarella;P. Laurelli;G. Mannocchi;F. Murtas;G. Murtas;L. Passalacqua;M. Pepe Altarelli;M. Chalmers;L. Curtis;J. Lynch;P. Negus;V. O'Shea;B. Raeven;C. Raine;D. Smith;P. Teixeira Dias;A. Thompson;J. Ward;R. Cavanaugh;S. Dhamotharan;C. Geweniger;P. Hanke;V. Hepp;E. Kluge;A. Putzer;K. Tittel;S. Werner;M. Wunsch;R. Beuselinck;D. Binnie;W. Cameron;P. Dornan;M. Girone;S. Goodsir;N. Marinelli;E. Martin;J. Nash;J. Nowell;H. Przysiezniak;A. Sciaba;J. Sedgbeer;E. Thomson;M. Williams;V. Ghete;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;C. Bowdery;P. Buck;G. Ellis;A. Finch;F. Foster;G. Hughes;R. Jones;N. Robertson;M. Smizanska;M. Williams;I. Giehl;F. Holldorfer;K. Jakobs;K. Kleinknecht;M. Krocker;A. Muller;H. Nurnberger;G. Quast;B. Renk;E. Rohne;H. Sander;S. Schmeling;H. Wachsmuth;C. Zeitnitz;T. Ziegler;J. Aubert;A. Bonissent;J. Carr;P. Coyle;A. Ealet;D. Fouchez;A. Tilquin;M.R.A. Aleppo;M. Antonelli;S. Gilardoni;F. Ragusa;V. Buscher;H. Dietl;G. Ganis;K. Huttmann;G. Lutjens;C. Mannert;W. Manner;H. Moser;S. Schael;R. Settles;H. Seywerd;H. Stenzel;W. Wiedenmann;G. Wolf;P. Azzurri;J. Boucrot;O. Callot;S. Chen;M. Davier;L. Duflot;J. Grivaz;P. Heusse;A. Jacholkowska;M. Kado;J. Lefrancois;L. Serin;J. Veillet;I. Videau;J. de Regie;D. Zerwas;G. Bagliesi;T. Boccali;C. Bozzi;G. Calderini;R. Dell'Orso;I. Ferrante;A. Giassi;A. Gregorio;F. Ligabue;P. Marrocchesi;A. Messineo;F. Palla;G. Rizzo;G. Sanguinetti;G. Sguazzoni;R. Tenchini;A. Venturi;P. Verdini;G. Blair;J. Coles;G. Cowan;M. Green;D. Hutchcroft;L. Jones;T. Medcalf;J. Strong;D. Botterill;R. Clifft;T. Edgecock;P. Norton;J. Thompson;I. Tomalin;B. Bloch Devaux;P. Colas;B. Fabbro;G. Faif;E. Lancon;M. Lemaire;E. Locci;P. Perez;J. Rander;J. Renardy;A. Rosowsky;P. Saeger;A. Trabelsi;B. Tuchming;B. Vallage;S. Black;J. Dann;G. Loomis;H. Kim;N. Konstantinidis;A. Litke;M. McNeil;G. Taylor;C. Booth;S. Cartwright;F. Combley;P. Hodgson;M. Lehto;L. Thompson;K. Affholderbach;A. Bohrer;S. Brandt;C. Grupen;J. Hess;A. Misiejuk;G. Prange;U. Sieler;G. Giannini;B. Gobbo;J. Putz;J. Rothberg;S. Wasserbaech;R. Williams;S. Armstrong;P. Elmer;D. Ferguson;Y. Gao;S. Gonzalez;O. Hayes;H. Hu;S. Jin;J. Kile;P. McNamara;J. Nielsen;W. Orejudos;Y. Pan;Y. Saadi;I. Scott;J. Walsh;J. von Wimmersperg Toeller;S. Wu;X. Wu;G. Zobernig

1999

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).

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	Settori scientifico-disciplinari dell'articolo (sola visualizzazione)
	
				Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
			
	Data di pubblicazione
	
				1999
			
	Rivista in ANCE
	
				PHYSICS LETTERS. SECTION B
			
	DOI
	
				https://dx.doi.org/10.1016/S0370-2693(99)01088-6
			
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