Measuremént of the b baryon lifetime and branching fractions in Z decays

Lambda(b)) . Br(Lambda(b) --> Lambda l(-)(v) over bar X) = 0.326 +/- 0.016 +/- 0.039% for the first sample and Br(b --> Lambda(b)) . Br(Lambda(b) --> Lambda(c)(+)l(-)(v) over bar X) = 0.86 +/- 0.07 +/- 0.14% for the second and third samples combined. -->
Popis souboru: STAMPA
Jazyk: English
ISSN: 1434-6044
1434-6052
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c2a5f607e2ad5367ffb5c59e61523d6
http://hdl.handle.net/10281/390128
Rights: OPEN
Přírůstkové číslo: edsair.doi.dedup.....6c2a5f607e2ad5367ffb5c59e61523d6
Autor: Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, G., Lees, J. P., Lucotte, A., Minard, M. N., Nief, J. Y., Pietrzyk, B., Casado, M. P., Chmeissani, M., Comas, P., Crespo, J. M., Delfino, M., Fernandez, E., Fernandez Bosman, M., Garrido, L., Juste, A., Martinez, M., Merino, G., Miquel, R., Mir, L. M., Padilla, C., Park, I. C., Pascual, A., Perlas, J. A., Riu, I., Sanchez, F., Colaleo, A., Creanza, D., Palma, M. d., Gelao, G., Iaselli, G., Maggi, G., Maggi, M., Marinelli, N., 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., Alemany, R., Becker, U., Bazarko, A. O., Bright Thomas, P., Cattaneo, M., Cerutti, F., Dissertori, G., Drevermann, H., Forty, R. W., Frank, M., Hagelberg, R., Hansen, J. B., Harvey, J., Janot, P., Jost, B., Kneringer, E., Knobloch, J., Lehraus, I., Mato, P., Minten, A., Moneta, L., Pacheco, A., Pusztaszeri, J. F., Ranjard, F., Rizzo, G., Rolandi, L., Rousseau, D., Schlatter, D., Schmitt, M., Schneider, O., Tejessy, W., Teubert, F., Tomalin, I. R., Wachsmuth, H., Wagner, A., Ajaltouni, Z., Barres, A., Boyer, C., Falvard, A., Ferdi, C., Gay, P., Guicheney, C., Henrard, P., Jousset, J., Michel, B., Monteil, S., Montret, J. C., Pallin, D., Perret, P., Podlyski, F., Proriol, J., Rosnet, P., Rossignol, J. M., Fearnley, T., Hansen, J. D., Hansen, J. R., Hansen, P. H., Nilsson, B. S., Rensch, B., Waananen, A., Daskalakis, G., Kyriakis, A., Markou, C., Simopoulou, E., Siotis, I., Vayaki, A., Blondel, A., Bonneaud, G., Brient, J. C., Bourdon, P., Rouge, A., Rumpf, M., Valassi, A., Verderi, M., Videau, H., Candlin, D. J., Parsons, M. I., Focardi, E., Parrini, G., Zachariadou, K., Corden, M., Georgiopoulos, C., Jaffe, D. E., Antonelli, A., Bencivenni, G., Bologna, G., Bossi, F., Campana, P., Capon, G., Casper, D., Chiarella, V., Felici, G., Laurelli, P., Mannocchi, G., Murtas, F., Murtas, G. P., Passalacqua, L., Pepe Altarelli, M., Curtis, L., Dorris, S. J., Halley, A. W., Knowles, I. G., Lynch, J. G., O'Shea, V., Raine, C., Scarr, J. M., Smith, K., Teixeira Dias, P., Thompson, A. S., Thomson, E., Thomson, F., Turnbull, R. M., Buchmuller, O., Dhamotharan, S., Geweniger, C., Graefe, G., Hanke, P., Hansper, G., Hepp, V., Kluge, E. E., Putzer, A., Sommer, J., Tittel, K., Werner, S., Wunsch, M., Beuselinck, R., Binnie, D. M., Cameron, W., Dornan, P. J., Girone, M., Goodsir, S., Martin, E. B., Moutoussi, A., Nash, J., Sedgbeer, J. K., Spagnolo, P., Stacey, A. M., Williams, M. D., Ghete, V. M., Girtler, P., Kuhn, D., Rudolph, G., Betteridge, A. P., Bowdery, C. K., Buck, P. G., Colrain, P., Crawford, G., Finch, A. J., Foster, F., Hughes, G., R. W. L., Sloan, T., Williams, M. I., Giehl, I., Greene, A. M., Hoffmann, C., Jakobs, K., Kleinknecht, K., Quast, G., Renk, B., Rohne, E., Sander, H. G., Gemmeren, P. v., Zeitnitz, C., Aubert, J. J., Benchouk, C., Bonissent, A., Bujosa, G., Carr, J., Coyle, P., Diaconu, C., Etienne, F., Konstantinidis, N., Leroy, O., Motsch, F., Payre, P., Talby, M., Sadouki, A., Thulasidas, M., Trabelsi, K., Aleppo, M., Antonelli, M., Ragusa, F., Berlich, R., Blum, W., Buscher, V., Dietl, H., Ganis, G., Gotzhein, C., Kroha, H., Lutjens, G., Lutz, G., Manner, W., Moser, H. G., Richter, R., Rosado Schlosser, A., Schael, S., Settles, R., Seywerd, H., Denis, R. S., Stenzel, H., Wiedenmann, W., Wolf, G., Boucrot, J., Callot, O., Chen, S., Choi, Y., Cordier, A., Davier, M., Duflot, L., Grivaz, J. F., Heusse, P., Hocker, A., Jacholkowska, A., Jacquet, M., Kim, D. W., Diberder, F. L., Lefrancois, J., Lutz, A. M., Nikolic, I., Schune, M. H., Simion, S., Tournefier, E., Veillet, J. J., Videau, I., Zerwas, D., Azzurri, P., Bagliesi, G., Batignani, G., Bettarini, S., Bozzi, C., Calderini, G., Carpinelli, M., Ciocci, MARIA AGNESE, Ciulli, V., Dell'Orso, R., Fantechi, N., Ferrante, I., Foa, L., Forti, F., Giassi, A., Giorgi, M. A., Gregorio, A., Ligabue, F., Lusiani, A., Marrocchesi, PIER SIMONE, Messineo, A., Palla, F., Sanguinetti, G., Sciaba, A., Steinberger, J., Tenchini, R., Tonelli, G., Vannini, C., Venturi, A., Verdini, P. G., Blair, G. A., Bryant, L. M., Chambers, J. T., Gao, Y., Green, M. G., Medcalf, T., Perrodo, P., Strong, J. A., Von, J. H., Botterill, D. R., Clifft, R. W., Edgecock, T. R., Haywood, S., Norton, P. R., Thompson, J. C., Wright, A. E., Bloch Devaux, B., Colas, P., Emery, S., Kozanecki, W., Lancon, E., Lemaire, M. C., Locci, E., Perez, P., Rander, J., Renardy, J. F., Roussarie, A., Schuller, J. P., Schwindling, J., Trabelsi, A., Vallage, B., Black, S. N., Dann, J. H., Johnson, R. P., Kim, H. Y., Litke, A. M., Mcneil, M. A., Taylor, G., Booth, C. N., Boswell, R., C. A. J., Cartwright, S., Combley, F., Kelly, M. S., Lehto, M., Newton, W. M., Reeve, J., Thompson, L. F., Bohrer, A., Brandt, S., Cowan, G., Grupen, C., Lutters, G., Saraiva, P., Smolik, L., Stephan, F., Apollonio, M., Bosisio, L., Marina, R. D., Giannini, G., Gobbo, B., Musolino, G., Rothberg, J., Wasserbaech, S., Armstrong, S. R., Charles, E., Elmer, P., D. P. S., Gonzalez, S., Greening, T. C., Hayes, O. J., Hu, H., Jin, S., Mcnamara, P. A., Nachtman, J. M., Nielsen, J., Orejudos, W., Pan, Y. B., Saadi, Y., Scott, I. J., Walsh, J., S. L., Wu, Wu, X., Yamartino, J. M., Zobernig, G.
Přispěvatelé: Barate, R, Buskulic, D, Decamp, D, Ghez, P, Goy, G, Lees, J, Lucotte, A, Minard, M, Nief, J, Pietrzyk, B, Casado, M, Chmeissani, M, Comas, P, Crespo, J, Delfino, M, Fernandez, E, Fernandez Bosman, M, Garrido, L, Juste, A, Martinez, M, Merino, G, Miquel, R, Mir, L, Padilla, C, Park, I, Pascual, A, Perlas, J, Riu, I, Sanchez, F, Colaleo, A, Creanza, D, de Palma, M, Gelao, G, Iaselli, G, Maggi, G, Maggi, M, Marinelli, N, 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, Alemany, R, Becker, U, Bazarko, A, Bright Thomas, P, Cattaneo, M, Cerutti, F, Dissertori, G, Drevermann, H, Forty, R, Frank, M, Hagelberg, R, Hansen, J, Harvey, J, Janot, P, Jost, B, Kneringer, E, Knobloch, J, Lehraus, I, Mato, P, Minten, A, Moneta, L, Pacheco, A, Pusztaszeri, J, Ranjard, F, Rizzo, G, Rolandi, L, Rousseau, D, Schlatter, D, Schmitt, M, Schneider, O, Tejessy, W, Teubert, F, Tomalin, I, Wachsmuth, H, Wagner, A, Ajaltouni, Z, Barres, A, Boyer, C, Falvard, A, Ferdi, C, Gay, P, Guicheney, C, Henrard, P, Jousset, J, Michel, B, Monteil, S, Montret, J, Pallin, D, Perret, P, Podlyski, F, Proriol, J, Rosnet, P, Rossignol, J, Fearnley, T, Hansen, P, Nilsson, B, Rensch, B, Waananen, A, Daskalakis, G, Kyriakis, A, Markou, C, Simopoulou, E, Siotis, I, Vayaki, A, Blondel, A, Bonneaud, G, Brient, J, Bourdon, P, Rouge, A, Rumpf, M, Valassi, A, Verderi, M, Videau, H, Candlin, D, Parsons, M, Focardi, E, Parrini, G, Zachariadou, K, Corden, M, Georgiopoulos, C, Jaffe, D, Antonelli, A, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Casper, D, Chiarella, V, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, G, Passalacqua, L, Pepe Altarelli, M, Curtis, L, Dorris, S, Halley, A, Knowles, I, Lynch, J, O'Shea, V, Raine, C, Scarr, J, Smith, K, Teixeira Dias, P, Thompson, A, Thomson, E, Thomson, F, Turnbull, R, Buchmuller, O, Dhamotharan, S, Geweniger, C, Graefe, G, Hanke, P, Hansper, G, Hepp, V, Kluge, E, Putzer, A, Sommer, J, Tittel, K, Werner, S, Wunsch, M, Beuselinck, R, Binnie, D, Cameron, W, Dornan, P, Girone, M, Goodsir, S, Martin, E, Moutoussi, A, Nash, J, Sedgbeer, J, Spagnolo, P, Stacey, A, Williams, M, Ghete, V, Girtler, P, Kuhn, D, Rudolph, G, Betteridge, A, Bowdery, C, Buck, P, Colrain, P, Crawford, G, Finch, A, Foster, F, Hughes, G, Jones, R, Sloan, T, Giehl, I, Greene, A, Hoffmann, C, Jakobs, K, Kleinknecht, K, Quast, G, Renk, B, Rohne, E, Sander, H, van Gemmeren, P, Zeitnitz, C, Aubert, J, Benchouk, C, Bonissent, A, Bujosa, G, Carr, J, Coyle, P, Diaconu, C, Etienne, F, Konstantinidis, N, Leroy, O, Motsch, F, Payre, P, Talby, M, Sadouki, A, Thulasidas, M, Trabelsi, K, Aleppo, M, Antonelli, M, Ragusa, F, Berlich, R, Blum, W, Buscher, V, Dietl, H, Ganis, G, Gotzhein, C, Kroha, H, Lutjens, G, Lutz, G, Manner, W, Moser, H, Richter, R, Rosado Schlosser, A, Schael, S, Settles, R, Seywerd, H, St Denis, R, Stenzel, H, Wiedenmann, W, Wolf, G, Boucrot, J, Callot, O, Chen, S, Choi, Y, Cordier, A, Davier, M, Duflot, L, Grivaz, J, Heusse, P, Hocker, A, Jacholkowska, A, Jacquet, M, Kim, D, Le Diberder, F, Lefrancois, J, Lutz, A, Nikolic, I, Schune, M, Simion, S, Tournefier, E, Veillet, J, Videau, I, Zerwas, D, Azzurri, P, Bagliesi, G, Batignani, G, Bettarini, S, Bozzi, C, Calderini, G, Carpinelli, M, Ciocci, M, Ciulli, V, Dell'Orso, R, Fantechi, N, Ferrante, I, Foa, L, Forti, F, Giassi, A, Giorgi, M, Gregorio, A, Ligabue, F, Lusiani, A, Marrocchesi, P, Messineo, A, Palla, F, Sanguinetti, G, Sciaba, A, Steinberger, J, Tenchini, R, Tonelli, G, Vannini, C, Venturi, A, Verdini, P, Blair, G, Bryant, L, Chambers, J, Gao, Y, Green, M, Medcalf, T, Perrodo, P, Strong, J, von Wimmersperg Toeller, J, Botterill, D, Clifft, R, Edgecock, T, Haywood, S, Norton, P, Thompson, J, Wright, A, Bloch Devaux, B, Colas, P, Emery, S, Kozanecki, W, Lancon, E, Lemaire, M, Locci, E, Perez, P, Rander, J, Renardy, J, Roussarie, A, Schuller, J, Schwindling, J, Trabelsi, A, Vallage, B, Black, S, Dann, J, Johnson, R, Kim, H, Litke, A, Mcneil, M, Taylor, G, Booth, C, Boswell, R, Brew, C, Cartwright, S, Combley, F, Kelly, M, Lehto, M, Newton, W, Reeve, J, Thompson, L, Bohrer, A, Brandt, S, Cowan, G, Grupen, C, Lutters, G, Saraiva, P, Smolik, L, Stephan, F, Apollonio, M, Bosisio, L, Della Marina, R, Giannini, G, Gobbo, B, Musolino, G, Rothberg, J, Wasserbaech, S, Armstrong, S, Charles, E, Elmer, P, Ferguson, D, Gonzalez, S, Greening, T, Hayes, O, Hu, H, Jin, S, Mcnamara, P, Nachtman, J, Nielsen, J, Orejudos, W, Pan, Y, Saadi, Y, Scott, I, Walsh, J, Wu, S, Wu, X, Yamartino, J, Zobernig, G, Lees, Jp, Minard, Mn, Nief, Jy, Casado, Mp, Crespo, Jm, Mir, Lm, Park, Ic, Perlas, Ja, Bazarko, Ao, Forty, Rw, Hansen, Jb, Pusztaszeri, Jf, Rolandi, Luigi, Tomalin, Ir, Montret, Jc, Rossignol, Jm, Hansen, Jd, Hansen, Jr, Hansen, Ph, Brient, Jc, Candlin, Dj, Parsons, Mi, Jaffe, De, Murtas, Gp, Dorris, Sj, Halley, Aw, Knowles, Ig, Lynch, Jg, Scarr, Jm, Turnbull, Rm, Kluge, Ee, Binnie, Dm, Dornan, Pj, Martin, Eb, Sedgbeer, Jk, Stacey, Am, Williams, Md, Ghete, Vm, Betteridge, Ap, Bowdery, Ck, Buck, Pg, Finch, Aj, Jones, Rwl, Williams, Mi, Greene, Am, Sander, Hg, Aubert, Jj, Moser, Hg, Grivaz, Jf, Kim, Dw, Lutz, Am, Schune, Mh, Veillet, Jj, Ciocci, Ma, Giorgi, Ma, Ligabue, Franco, Lusiani, Alberto, Verdini, Pg, Blair, Ga, Bryant, Lm, Chambers, Jt, Green, Mg, Strong, Ja, von Wimmersperg Toeller, Jh, Botterill, Dr, Clifft, Rw, Edgecock, Tr, Norton, Pr, Thompson, Jc, Wright, Ae, Lemaire, Mc, Renardy, Jf, Schuller, Jp, Black, Sn, Dann, Jh, Johnson, Rp, Kim, Hy, Litke, Am, Mcneil, Ma, Booth, Cn, Brew, Caj, Newton, Wm, Thompson, Lf, Armstrong, Sr, Ferguson, Dp, Greening, Tc, Hayes, Oj, Mcnamara, Pa, Nachtman, Jm, Pan, Yb, Scott, Ij, Wu, Sl, Yamartino, Jm, Zobernig, G., Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), ALEPH, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 1998
Předmět:
Zdroj: European Physical Journal C: Particles and Fields
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 1998, 2, pp.197-211
European Physical Journal C: Particles and Fields, 1998, 2, pp.197-211
ISSN: 1434-6044
1434-6052
Popis: Using approximately 4 million hadronic Z decays recorded with the ALEPH detector from 1991 through 1995, the lifetime of the b baryon is measured with three independent methods. From the impact parameter distribution of candidate leptons in 1063 events with Lambda l(-) combinations, the average b baryon lifetime is measured to be 1.20 +/- 0.08 +/- 0.06 ps. From a sample of 193 fully reconstructed Lambda(c)(+) candidates correlated with a lepton and a sample of 46 Lambda l(+)l(-) combinations the Lambda(b) lifetime is measured to be 1.21+/-0.11 ps. The product branching fractions to these final states are Br(b-->Lambda(b)) . Br(Lambda(b) --> Lambda l(-)(v) over bar X) = 0.326 +/- 0.016 +/- 0.039% for the first sample and Br(b --> Lambda(b)) . Br(Lambda(b) --> Lambda(c)(+)l(-)(v) over bar X) = 0.86 +/- 0.07 +/- 0.14% for the second and third samples combined.
Databáze: OpenAIRE
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