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Upper limit for the decay B- → τ-(v)over-barτ the b → τ(v)over-barτX branching ratio

PHYSICS LETTERS B 496:1-2 (2000) 43-58

Authors:

P Abreu, W Adam, T Adye, P Adzic, I Ajinenko, Z Albrecht, T Alderweireld, GD Alekseev, R Alemany, T Allmendinger, PP Allport, S Almehed, U Amaldi, N Amapane, S Amato, EG Anassontzis, P Andersson, A Andreazza, S Andringa, P Antilogus, WD Apel, Y Arnoud, B Åsman, JE Augustin, A Augustinus, P Baillon, P Bambade, F Barao, G Barbiellini, R Barbier, DY Bardin, G Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, P Beilliere, Y Belokopytov, NC Benekos, AC Benvenuti, C Berat, M Berggren, D Bertrand, M Besancon, M Bigi, MS Bilenky, MA Bizouard, D Bloch, HM Blom, M Bonesini, M Boonekamp, PSL Booth, AW Borgland, G Borisov, C Bosio, O Botner, E Boudinov, B Bouquet, C Bourdarios, TJV Bowcock, I Boyko, I Bozovic, M Bozzo, M Bracko, P Branchini, RA Brenner, P Bruckman, JM Brunet, L Bugge, T Buran, B Buschbeck, P Buschmann, S Cabrera, M Caccia, M Calvi, T Camporesi, V Canale, F Carena, L Carroll, C Caso, MVC Gimenez, A Cattai, FR Cavallo, V Chabaud, P Charpentier, P Checchia, GA Chelkov, R Chierici, P Chliapnikov, P Chochula, V Chorowicz, J Chudoba, K Cieslik, P Collins, R Contri, E Cortina, G Cosme, F Cossutti, HB Crawley, D Crennell, S Crepe, G Crosetti, JC Maestro, S Czellar, M Davenport, W Da Silva, G Della Ricca, P Delpierre, N Demaria, A De Angelis, W De Boer, C De Clercq, B De Lotto, A De Min, L De Paula, H Dijkstra, L Di Ciaccio, J Dolbeau, K Doroba, M Dracos, J Drees, M Dris, A Duperrin, JD Durand, G Eigen, T Ekelof, G Ekspong, M Ellert, M Elsing, JP Engel, ME Santo, G Fanourakis, D Fassouliotis, J Fayot, M Feindt, A Ferrer, E Ferrer-Ribas, F Ferro, S Fichet, A Firestone, U Flagmeyer, H Foeth, E Fokitis, F Fontanelli, B Franek, AG Frodesen, R Fruhwirth, F Fulda-Quenzer, J Fuster, A Galloni, D Gamba, S Gamblin, M Gandelman, C Garcia, C Gaspar, M Gaspar, U Gasparini, P Gavillet, EN Gazis, D Gele, T Geralis, L Gerdyukov, N Ghodbane, I Gil, F Glege, R Gokieli, B Golob, G Gomez-Ceballos, P Goncalves, IG Caballero, G Gopal, L Gorn, Y Gouz, V Gracco, J Grahl, E Graziani, P Gris, G Grosdidier, K Grzelak, J Guy, C Haag, F Hahn, S Hahn, S Haider, A Hallgren, K Hamacher, J Hansen, FJ Harris, V Hedberg, S Heising, JJ Hernandez, P Herquet, H Herr, TL Hessing, JM Heuser, E Higon, SO Holmgren, PJ Holt, S Hoorelbeke, M Houlden, J Hrubec, M Huber, K Huet, GJ Hughes, K Hultqvist, JN Jackson, R Jacobsson, P Jalocha, R Janik, C Jarlskog, G Jarlskog, P Jarry, B Jean-Marie, D Jeans, EK Johansson, P Jonsson, C Joram, P Juillot, L Jungermann, F Kapusta, K Karafasoulis, S Katsanevas, EC Katsoufis, R Keranen, G Kernel, BP Kersevan, BA Khomenko, NN Khovanski, A Kiiskinen, B King, A Kinvig, NJ Kjaer, O Klapp, H Klein, P Kluit, P Kokkinias, V Kostioukhine, C Kourkoumelis, O Kouznetsov, M Krammer, E Kriznic, J Krstic, Z Krumstein, P Kubinec, J Kurowska, K Kurvinen, JW Lamsa, DW Lane, V Lapin, JP Laugier, R Lauhakangas, G Leder, F Ledroit, V Lefebure, L Leinonen, A Leisos, R Leitner, G Lenzen, V Lepeltier, T Lesiak, M Lethuillier, J Libby, W Liebig, D Liko, A Lipniacka, I Lippi, B Loerstad, JG Loken, JH Lopes, JM Lopez, R Lopez-Fernandez, D Loukas, P Lutz, L Lyons, J MacNaughton, JR Mahon, A Maio, A Malek, TGM Malmgren, S Maltezos, V Malychev, F Mandl, J Marco, R Marco, B Marechal, M Margoni, JC Marin, C Mariotti, A Markou, C Martinez-Rivero, F Martinez-Vidal, SMI Garcia, J Masik, N Mastroyiannopoulos, F Matorras, C Matteuzzi, G Matthiae, F Mazzucato, M Mazzucato, M Mc Cubbin, R Mc Kay, R Mc Nulty, G Mc Pherson, C Meroni, WT Meyer, A Miagkov, E Migliore, L Mirabito, WA Mitaroff, U Mjoernmark, T Moa, M Moch, R Moeller, K Moenig, MR Monge, D Moraes, X Moreau, P Morettini, G Morton, U Mueller, K Muenich, M Mulders, C Mulet-Marquis, R Muresan, WJ Murray, B Muryn, G Myatt, T Myklebust, F Naraghi, M Nassiakou, FL Navarria, S Navas, K Nawrocki, P Negri, N Neufeld, R Nicolaidou, BS Nielsen, P Niezurawski, M Nikolenko, V Nomokonov, A Nygren, V Obraztsov, AG Olshevski, A Onofre, R Orava, G Orazi, K Osterberg, A Ouraou, M Paganoni, S Paiano, R Pain, R Paiva, J Palacios, H Palka, TD Papadopoulou, L Pape, C Parkes, F Parodi, U Parzefall, A Passeri, O Passon, T Pavel, M Pegoraro, L Peralta, M Pernicka, A Perrotta, C Petridou, A Petrolini, HT Phillips, F Pierre, M Pimenta, E Piotto, T Podobnik, ME Pol, G Polok, P Poropat, V Pozdniakov, P Privitera, N Pukhaeva, A Pullia, D Radojicic, S Ragazzi, H Rahmani, J Rames, PN Ratoff, AL Read, P Rebecchi, NG Redaelli, J Rehn, D Reid, R Reinhardt, PB Renton, LK Resvanis, F Richard, J Ridky, G Rinaudo, I Ripp-Baudot, O Rohne, A Romero, P Ronchese, EI Rosenberg, P Rosinsky, P Roudeau, T Rovelli, C Royon, V Ruhlmann-Kleider, A Ruiz, H Saarikko, Y Sacquin, A Sadovsky, G Sajot, J Salt, D Sampsonidis, M Sannino, P Schwemling, B Schwering, U Schwickerath, F Scuri, P Seager, Y Sedykh, AM Segar, N Seibert, R Sekulin, RC Shellard, M Siebel, L Simard, F Simonetto, AN Sisakian, G Smadja, N Smirnov, O Smirnova, GR Smith, A Sokolov, A Sopczak, R Sosnowski, T Spassov, E Spiriti, S Squarcia, C Stanescu, S Stanic, M Stanitzki, K Stevenson, A Stocchi, J Strauss, R Strub, B Stugu, M Szczekowski, M Szeptycka, T Tabarelli, A Taffard, F Tegenfeldt, F Terranova, J Thomas, J Timmermans, N Tinti, LG Tkatchev, M Tobin, S Todorova, A Tomaradze, B Tome, A Tonazzo, L Tortora, P Tortosa, G Transtromer, D Treille, G Tristram, M Trochimczuk, C Troncon, ML Turluer, IA Tyapkin, P Tyapkin, S Tzamarias, O Ullaland, V Uvarov, G Valenti, E Vallazza, P Van Dam, W Van den Boeck, WK Van Doninck, J Van Eldik, A Van Lysebetten, N van Remortel, I Van Vulpen, G Vegni, L Ventura, W Venus, F Verbeure, P Verdier, M Verlato, LS Vertogradov, V Verzi, D Vilanova, L Vitale, E Vlasov, AS Vodopyanov, G Voulgaris, V Vrba, H Wahlen, C Walck, AJ Washbrook, C Weiser, D Wicke, JH Wickens, GR Wilkinson, M Winter, M Witek, G Wolf, J Yi, O Yushchenko, A Zalewska, P Zalewski, D Zavrtanik, E Zevgolatakos, NI Zimin, A Zintchenko, P Zoller, GC Zucchelli, G Zumerle
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W pair production cross-section and W branching fractions in e+e- interactions at 189 GeV

PHYSICS LETTERS B 479:1-3 (2000) 89-100

Authors:

P Abreu, W Adam, T Adye, P Adzic, Z Albrecht, T Alderweireld, GD Alekseev, R Alemany, T Allmendinger, PP Allport, S Almehed, U Amaldi, N Amapane, S Amato, EG Anassontzis, P Andersson, A Andreazza, S Andringa, P Antilogus, WD Apel, Y Arnoud, B Åsman, JE Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, F Barao, G Barbiellini, R Barbier, DY Bardin, G Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, P Beilliere, Y Belokopytov, K Belous, NC Benekos, AC Benvenuti, C Berat, M Berggren, D Bertrand, M Besancon, MS Bilenky, MA Bizouard, D Bloch, HM Blom, M Bonesini, M Boonekamp, PSL Booth, G Borisov, C Bosio, O Botner, E Boudinov, B Bouquet, C Bourdarios, TJV Bowcock, I Boyko, I Bozovic, M Bozzo, M Bracko, P Branchini, RA Brenner, P Bruckman, JM Brunet, L Bugge, T Buran, B Buschbeck, P Buschmann, S Cabrera, M Caccia, M Calvi, T Camporesi, V Canale, F Carena, L Carroll, C Caso, MVC Gimenez, A Cattai, FR Cavallo, V Chabaud, P Chapkin, P Charpentier, P Checchia, GA Chelkov, R Chierici, P Chliapnikov, P Chochula, V Chorowicz, J Chudoba, K Cieslik, P Collins, R Contri, E Cortina, G Cosme, F Cossutti, M Costa, HB Crawley, D Crennell, S Crepe, G Crosetti, JC Maestro, S Czellar, M Davenport, W Da Silva, G Della Ricca, P Delpierre, N Demaria, A De Angelis, W De Boer, C De Clercq, B De Lotto, A De Min, L De Paula, H Dijkstra, L Di Ciaccio, J Dolbeau, K Doroba, M Dracos, J Drees, M Dris, A Duperrin, JD Durand, G Eigen, T Ekelof, G Ekspong, M Ellert, M Elsing, JP Engel, ME Santo, G Fanourakis, D Fassouliotis, J Fayot, M Feindt, J Fernandez, A Ferrer, E Ferrer-Ribas, F Ferro, S Fichet, A Firestone, U Flagmeyer, H Foeth, E Fokitis, F Fontanelli, B Franek, AG Frodesen, R Fruhwirth, F Fulda-Quenzer, J Fuster, A Galloni, D Gamba, S Gamblin, M Gandelman, C Garcia, C Gaspar, M Gaspar, U Gasparini, P Gavillet, EN Gazis, D Gele, T Geralis, N Ghodbane, I Gil, F Glege, R Gokieli, B Golob, G Gomez-Ceballos, P Goncalves, IG Caballero, G Gopal, L Gorn, Y Gouz, V Gracco, J Grahl, E Graziani, P Gris, G Grosdidier, K Grzelak, J Guy, C Haag, F Hahn, S Hahn, S Haider, A Hallgren, K Hamacher, J Hansen, FJ Harris, F Hauler, V Hedberg, S Heising, JJ Hernandez, P Herquet, H Herr, JM Heuser, E Higon, SO Holmgren, PJ Holt, S Hoorelbeke, M Houlden, J Hrubec, M Huber, GJ Hughes, K Hultqvist, JN Jackson, R Jacobsson, P Jalocha, R Janik, C Jarlskog, G Jarlskog, P Jarry, B Jean-Marie, D Jeans, EK Johansson, P Jonsson, C Joram, P Juillot, L Jungermann, F Kapusta, K Karafasoulis, S Katsanevas, EC Katsoufis, R Keranen, G Kernel, BP Kersevan, Y Khokhlov, BA Khomenko, NN Khovanski, A Kiiskinen, B King, A Kinvig, NJ Kjaer, O Klapp, H Klein, P Kluit, P Kokkinias, V Kostioukhine, C Kourkoumelis, O Kouznetsov, M Krammer, E Kriznic, Z Krumstein, P Kubinec, J Kurowska, K Kurvinen, JW Lamsa, DW Lane, V Lapin, JP Laugier, R Lauhakangas, G Leder, F Ledroit, V Lefebure, L Leinonen, A Leisos, R Leitner, G Lenzen, V Lepeltier, T Lesiak, M Lethuillier, J Libby, W Liebig, D Liko, A Lipniacka, I Lippi, B Loerstad, JG Loken, JH Lopes, JM Lopez, R Lopez-Fernandez, D Loukas, P Lutz, L Lyons, J MacNaughton, JR Mahon, A Maio, A Malek, TGM Malmgren, S Maltezos, V Malychev, F Mandl, J Marco, R Marco, B Marechal, M Margoni, JC Marin, C Mariotti, A Markou, C Martinez-Rivero, SMI Garcia, J Masik, N Mastroyiannopoulos, F Matorras, C Matteuzzi, G Matthiae, F Mazzucato, M Mazzucato, M Mc Cubbin, R Mc Kay, R Mc Nulty, G Mc Pherson, C Meroni, WT Meyer, A Miagkov, E Migliore, L Mirabito, WA Mitaroff, U Mjoernmark, T Moa, M Moch, R Moeller, K Moenig, MR Monge, D Moraes, X Moreau, P Morettini, G Morton, U Mueller, K Muenich, M Mulders, C Mulet-Marquis, R Muresan, WJ Murray, B Muryn, G Myatt, T Myklebust, F Naraghi, M Nassiakou, FL Navarria, K Nawrocki, P Negri, N Neufeld, R Nicolaidou, BS Nielsen, P Niezurawski, M Nikolenko, V Nomokonov, A Nygren, V Obraztsov, AG Olshevski, A Onofre, R Orava, G Orazi, K Osterberg, A Ouraou, A Oyanguren, M Paganoni, S Paiano, R Pain, R Paiva, J Palacios, H Palka, TD Papadopoulou, L Pape, C Parkes, F Parodi, U Parzefall, A Passeri, O Passon, T Pavel, M Pegoraro, L Peralta, M Pernicka, A Perrotta, C Petridou, A Petrolini, HT Phillips, F Pierre, M Pimenta, E Piotto, T Podobnik, ME Pol, G Polok, P Poropat, V Pozdniakov, P Privitera, N Pukhaeva, A Pullia, D Radojicic, S Ragazzi, H Rahmani, J Rames, PN Ratoff, AL Read, P Rebecchi, NG Redaelli, M Regler, J Rehn, D Reid, P Reinertsen, R Reinhardt, PB Renton, LK Resvanis, F Richard, J Ridky, G Rinaudo, I Ripp-Baudot, O Rohne, A Romero, P Ronchese, EI Rosenberg, P Rosinsky, P Roudeau, T Rovelli, C Royon, V Ruhlmann-Kleider, A Ruiz, H Saarikko, Y Sacquin, A Sadovsky, G Sajot, J Salt, D Sampsonidis, M Sannino, A Savoy-Navarro, P Schwemling, B Schwering, U Schwickerath, F Scuri, P Seager, Y Sedykh, AM Segar, N Seibert, R Sekulin, G Sette, RC Shellard, M Siebel, L Simard, F Simonetto, AN Sisakian, G Smadja, O Smirnova, GR Smith, O Solovianov, A Sopczak, R Sosnowski, T Spassov, E Spiriti, S Squarcia, C Stanescu, M Stanitzki, K Stevenson, A Stocchi, J Strauss, R Strub, B Stugu, M Szczekowski, M Szeptycka, T Tabarelli, A Taffard, F Tegenfeldt, F Terranova, J Timmermans, N Tinti, LG Tkatchev, M Tobin, S Todorova, A Tomaradze, B Tome, A Tonazzo, L Tortora, P Tortosa, G Transtromer, D Treille, G Tristram, M Trochimczuk, C Troncon, ML Turluer, IA Tyapkin, P Tyapkin, S Tzamarias, O Ullaland, V Uvarov, G Valenti, E Vallazza, P Van Dam, W Van den Boeck, WK Van Doninck, J Van Eldik, A Van Lysebetten, N van Remortel, I Van Vulpen, G Vegni, L Ventura, W Venus, F Verbeure, P Verdier, M Verlato, LS Vertogradov, V Verzi, D Vilanova, L Vitale, E Vlasov, AS Vodopyanov, G Voulgaris, V Vrba, H Wahlen, C Walck, AJ Washbrook, C Weiser, D Wicke, JH Wickens, GR Wilkinson, M Winter, M Witek, G Wolf, J Yi, O Yushchenko, A Zalewska, P Zalewski, D Zavrtanik, E Zevgolatakos, NI Zimin, A Zintchenko, P Zoller, GC Zucchelli, G Zumerle
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Latest beam test results from RICH prototypes using hybrid photo detectors and multi anode PMTs

NUCL INSTRUM METH A 433:1-2 (1999) 159-163

Authors:

E Albrecht, M Alemi, G Barber, JH Bibby, NH Brook, A Duane, S Easo, L Eklund, V Gibson, T Gys, AW Halley, N Harnew, M John, D Piedigrossi, B Simmons, N Smale, P Teixeira-Dias, D Websdale, SA Wotton, K Wyllie

Abstract:

Beam tests were performed in 1998 to investigate the performance of a prototype of the downstream RICH of the LHCb using hybrid photo-diodes and multi anode PMTs. The angular resolutions obtained from these photodetectors under various experimental configurations are compared with the expectations from simulation. (C) 1999 Elsevier Science B.V. All rights reserved.
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Latest beam test results from RICH prototypes using hybrid photo detectors and multi anode PMTs

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 433:1 (1999) 159-163

Authors:

E Albrecht, M Alemi, G Barber, JH Bibby, NH Brook, A Duane, S Easo, L Eklund, V Gibson, T Gys, AW Halley, N Harnew, M John, D Piedigrossi, B Simmons, N Smale, P Teixeira-Dias, D Websdale, SA Wotton, K Wyllie

Abstract:

Beam tests were performed to investigate the performance of a prototype of the downstream ring imaging counter (RICH) of the LHCb using hybrid photodiodes and multi-anode photomultipliers. The Cerenkov angle resolution obtained for the three types of photodetectors tested agreed well with the expectations from simulations. Using 61-pixel hybrid photodiodes, a single photon resolution of 0.35 mrad was attained and the particle identification capability was demonstrated.
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A precise measurement of the partial decay width ratio Rb0 = Γbb̄/Γhad

European Physical Journal C 10:3 (1999) 415-442

Authors:

P Abreu, W Adam, T Adye, P Adzic, Z Albrecht, T Alderweireld, GD Alekseev, R Alemany, T Allmendinger, PP Allport, S Almehed, U Amaldi, S Amato, EG Anassontzis, P Andersson, A Andreazza, S Andringa, P Antilogus, WD Apel, Y Arnoud, B Åsman, JE Augustin, A Augustinus, P Baillon, P Bambade, F Barao, G Barbiellini, R Barbier, DY Bardin, G Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, P Beilliere, Y Belokopytov, K Belous, AC Benvenuti, C Berat, M Berggren, D Bertini, D Bertrand, M Besancon, F Bianchi, M Bigi, MS Bilenky, MA Bizouard, D Bloch, HM Blom, M Bonesini, W Bonivento, M Boonekamp, PSL Booth, AW Borgland, G Borisov, C Bosio, O Botner, E Boudinov, B Bouquet, C Bourdarios, TJV Bowcock, I Boyko, I Bozovic, M Bozzo, P Branchini, T Brenke, RA Brenner, P Bruckman, JM Brunet, L Bugge, T Buran, T Burgsmueller, P Buschmann, S Cabrera, M Caccia, M Calvi, T Camporesi, V Canale, F Carena, L Carroll, C Caso, MV Castillo Gimenez, A Cattai, FR Cavallo, V Chabaud, M Chapkin, P Charpentier, L Chaussard, P Checchia, GA Chelkov, R Chierici, P Chliapnikov, P Chochula, V Chorowicz, J Chudoba, K Cieslik, P Collins, R Contri, E Cortina

Abstract:

The partial decay width of the Z to bb̄ quark pairs has been measured by the DELPHI detector at LEP using data taken in the years 1992 to 1995. Decays of b-hadrons were tagged by several methods using tracks with large impact parameters and/or reconstructed secondary vertices, complemented by event shape variables. Combining these methods in a multivariate analysis the value Γ(Z → bb̄)/Γ(Z → had) = 0.21634 ± 0.00067 (stat) ± 0.00060 (syst) was obtained, where the cc̄ production fraction was fixed to its Standard Model value.
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