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Prototype RICH detector using multi-anode photo multiplier tubes and hybrid photo-diodes

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 456:3 (2001) 233-247

Authors:

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

Abstract:

The performance of a prototype Ring Imaging Cherenkov Detector is studied using a charged particle beam. The detector performance, using CF4 and air as radiators, is described. Cherenkov angle precision and photoelectron yield using hybrid photo-diodes and multi-anode PMTs agree with simulations and are assessed in terms of the requirements of the LHCb experiment.

Search for the decay B+→D*+Ks0

Physical Review D 64:7 (2001)

Authors:

A Gritsan, JP Alexander, R Baker, C Bebek, BE Berger, K Berkelman, F Blanc, V Boisvert, DG Cassel, PS Drell, JE Duboseq, KM Ecklund, R Ehrlich, P Gaidarev, L Gibbons, B Gittelman, SW Gray, DL Hartill, BK Heltsley, PI Hopman, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, M Lohner, A Magerkurth, TO Meyer, NB Mistry, E Nordberg, M Palmer, JR Patterson, D Peterson, D Riley, A Romano, JG Thayer, D Urner, B Valant-Spaight, G Viehhauser, A Warburton, P Avery, C Prescott, AI Rubiera, H Stoeck, J Yelton, G Brandenburg, A Ershov, DYJ Kim, R Wilson, T Bergfeld, BI Eisenstein, J Ernst, GE Gladding, GD Gollin, RM Hans, E Johnson, I Karliner, MA Marsh, C Plager, C Sedlack, M Selen, JJ Thaler, J Williams, KW Edwards, R Janicek, PM Patel, AJ Sadoff, R Ammar, A Bean, D Besson, X Zhao, S Anderson, VV Frolov, Y Kubota, SJ Lee, JJ O'Neill, R Poling, T Riehle, A Smith, CJ Stepaniak, J Urheim, S Ahmed, MS Alam, SB Athar, L Jian, L Ling, M Saleem, S Timm, F Wappler, A Anastassov, E Eckhart, KK Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, TK Pedlar, H Schwarthoff

Abstract:

We report on a search for the decay B+→D*+Ks0 and its charge conjugate with the CLEO detector at the Cornell Electron Storage Ring (CESR). No candidates are found in 9.10 fb-1 of data. The background is estimated to be 0.29±0.05 leading to an upper limit B(B+→D*+K0) = 9.5×10-5 (90% confidence level). ©2001 The American Physical Society.

51ÁÔÆæÈë¿Ú of dimuon production in photon-photon collisions and measurement of QED photon structure functions at LEP

European Physical Journal C 19:1 (2001) 15-28

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 Ã…sman, 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, MV Castillo 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

Abstract:

Muon pair production in the process e+e- → e+e- μ+μ- is studied using the data taken at LEP1 (√s ≃ mz) with the DELPHI detector during the years 1992-1995. The corresponding integrated luminosity is 138.5 pb-1. The QED predictions have been tested over the whole Q2 range accessible at LEP1 (from several GeV2/c4 to several hundred GeV2/c4) by comparing experimental distributions with distributions resulting from Monte Carlo simulations using various generators. Selected events are used to extract the leptonic photon structure function Fγ2. Azimuthal correlations are used to obtain information on additional structure functions, FγA and FγB, which originate from interference terms of the scattering amplitudes. The measured ratios FγA/Fγ2 and Fγµþ/Fγ2 are significantly different from zero and consistent with QED predictions.

A measurement of the Tau topological branching ratios

EUROPEAN PHYSICAL JOURNAL C 20:4 (2001) 617-637

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, E Anashkin, EG Anassontzis, P Andersson, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, B Ã…sman, 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, T Bellunato, Y Belokopytov, K Belous, NC Benekos, AC Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, MS Bilenky, D Bloch, HM Blom, J Bol, M Bonesini, M Boonekamp, PSL Booth, G Borisov, C Bosio, O Botner, E Boudinov, B Bouquet, TJV Bowcock, I Boyko, I Bozovic, M Bozzo, M Bracko, P Branchini, RA Brenner, E Brodet, P Bruckman, JM Brunet, L Bugge, P Buschmann, M Caccia, M Calvi, T Camporesi, V Canale, F Carena, L Carroll, C Caso, A Cattai, FR Cavallo, M Chapkin, P Charpentier, P Checehia, GA Chelkov, R Chierici, P Chliapnikov, P Chochula, V Chorowicz, J Chudoba, SH Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, M Costa, HB Crawley, D Crennell, J Croix, JC Maestro, S Czellar, J D'Hondt, J Dalmau, 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, K Doroba, M Dracos, J Drees, M Dris, G Eigen, T Ekelof, M Ellert, M Elsing, JP Engel, ME Santo, G Fanourakis, D Fassouliotis, T Feindt, J Fernandez, A Ferrer, E Ferrer-Ribas, F Ferro, A Firestone, U Flagmeyer, H Foeth, E Fokitis, F Fontanelli, B Franek, AG Frodesen, R Fruhwirth, F Fulda-Quenzer, J Fuster, D Gamba, S Gamblin, M Gandelman, C Garcia, C Gaspar, M Gaspar, U Gasparini, P Gavillet, EN Gazis, D Gele, T Geralis, N Ghodbane, 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, G Grosdidier, K Grzelak, J Guy, C Haag, F Hahn, S Hahn, S Haider, Z Hajduk, A Hallgren, K Hamacher, K Hamilton, J Hansen, FJ Harris, S Haug, F Hauler, V Hedberg, S Heising, P Herquet, H Herr, O Hertz, E Higon, SO Holmgren, PJ Holt, S Hoorelbeke, M Houlden, J Hrubec, GJ Hughes, K Hultqvist, JN Jackson, R Jacobsson, 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, P Kluit, P Kokkinias, V Kostioukhine, C Kourkoumelis, O Kouznetsov, M Krammer, E Kriznic, Z Krumstein, P Kubinec, W Kucewicz, M Kucharczyk, J Kurowska, JW Lamsa, JP Laugier, G Leder, F Ledroit, L Leinonen, A Leisos, R Leitner, J Lemonne, G Lenzen, V Lepeltier, M Lethuillier, J Libby, W Liebig, D Liko, A Lipniacka, I Lippi, JG Loken, JH Lopes, JM Lopez, R Lopez-Fernandez, D Loukas, P Lutz, L Lyons, J MacNaughton, JR Mahon, A Maio, A Malek, 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, E Merle, C Meroni, WT Meyer, A Miagkov, E Migliore, L Mirabito, WA Mitaroff, U Mjoernmark, T Moa, M Moch, K Moenig, MR Monge, J Montenegro, D Moraes, P Morettini, G Morton, U Mueller, K Muenich, M Mulders, LM Mundim, WJ Murray, G Myatt, T Myklebust, M Nassiakou, FL Navarria, K Nawrocki, P Negri, S Nemecek, N Neufeld, R Nicolaidou, P Niezurawski, T Nikolenko, V Nomokonov, A Nygren, A Oblakowska-Mucha, V Obraztsov, AG Olshevski, A Onofre, R Orava, 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, L Peralta, V Perepelitsa, M Pernicka, A Perrotta, C Petridou, A Petrolini, HT Phillips, F Pierre, M Pimenta, E Piotto, T Podobnik, V Poireau, ME Pol, G Polok, P Poropat, V Pozdniakov, P Privitera, N Pukhaeva, A Pullia, D Radojicic, S Ragazzi, H Rahmani, PN Ratoff, AL Read, P Rebecchi, NG Redaelli, M Regler, J Rehn, D Reid, R Reinhardt, PB Renton, LK Resvanis, F Richard, J Ridky, G Rinaudo, I Ripp-Baudot, A Romero, P Ronchese, EI Rosenberg, P Rosinsky, P Roudeau, T Rovelli, V Ruhlmann-Kleider, A Ruiz, H Saarikko, Y Sacquin, A Sadovsky, G Sajot, L Salmi, J Salt, D Sampsonidis, M Sannino, A Savoy-Navarro, C Schwanda, P Schwemling, B Schwering, U Schwickerath, F Scuri, P Seager, Y Sedykh, AM Segar, R Sekulin, G Sette, RC Shellard, M Siebel, L Simard, F Simonetto, AN Sisakian, G Smadja, N Smirnov, O Smirnova, GR Smith, A Sokolov, O Solovianov, A Sopczak, R Sosnowski, T Spassov, E Spiriti, S Squarcia, C Stanescu, M Stanitzki, A Stocchi, J Strauss, R Strub, D Stugu, M Szczekowski, M Szeptycka, T Szumlak, T Tabarelli, A Taffard, F Tegenfeldt, F Terranova, J Timmermans, N Tinti, LG Tkatchev, M Tobin, S Todorova, B Tome, L Tortora, P Tortosa, D Treille, G Tristram, M Trochimczuk, C Troncon, ML Turluer, IA Tyapkin, P Tyapkin, S Tzamarias, O Ullaland, V Uvarov, G Valenti, E Vallazza, CV Velde, 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, AJ Washbrook, C Weiser, D Wicke, JH Wickens, GR Wilkinson, M Winter, G Wolf, J Yi, O Yushchenko, A Zalewska, P Zalewski, D Zavrtanik, E Zevgolatakos, NI Zimin, A Zintchenko, P Zoller, G Zumerle, M Zupan

Consistent measurements of αs from precise oriented event shape distributions (vol 14, pg 557, 2000)

EUROPEAN PHYSICAL JOURNAL C 19:4 (2001) 761-763

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 Ã…sman, JE Augustin, A Augustinus, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, P Beilliere, Y Belokopytov, NC Benekos, AC Benvenuti, C Berat, M Berggren, D Bertini, 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, P Branchini, T Brenke, RA Brenner, P Bruckman, JM Brunet, L Bugge, T Buran, T Burgsmueller, B Buschbeck, P Buschmann, S Cabrera, M Calvi, T Camporesi, V Canale, F Carena, L Carroll, C Caso, MVC Gimenez, A Cattai, FR Cavallo, V Chabaud, 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, G Cosme, F Cossutti, JH Cowell, HB Crawley, D Crennell, S Crepe, G Crosetti, JC Maestro, S Czellar, M Davenport, W Da Silva, A Deghorain, 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 De 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, B Erzen, ME Santo, G Fanourakis, D Fassouliotis, J Fayot, M Feindt, A Fenyuk, A Ferrer, E Ferrer-Ribas, F Ferro, S Fichet, A Firestone, U Flagmeyer, H Foeth, E Fokitis, F Fontanelli, B Franck, 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 Gelel, 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, C Green, HJ Grimm, P Gris, G Grosdidier, K Grzelak, M Gunther, J Guy, 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, K Huet, GJ Hughes, K Hultqvist, JN Jackson, R Jacobsson, P Jalocha, R Janik, C Jarlskog, G Jarlskog, P Jarry, B Jean-Marie, EK Johansson, P Jonsson, C Joram, P Juillot, F Kapusta, K Karafasoulis, S Katsanevas, EC Katsoufis, R Keranen, BP Kersevan, BA Khomenko, NN Khovanski, A Kiiskinen, B King, A Kinvig, NJ Kjaer, O Klapp, H Klein, P Kluit, P Kokkinias, M Koratzinos, C Kourkoumelis, V Kostioukhine, O Kouznetsov, M Krammer, E Kriznic, Z Krumstein, P Kubinec, J Kurowska, K Kurvinen, JW Lamsa, DW Lane, P Langefeld, V Lapin, JP Laugier, R Lauhakangas, G Leder, F Ledroit, V Lefeburc, L Leinonen, A Leisos, R Leitner, J Lemonne, G Lenzen, V Lepeltier, T Lesiak, M Lethuiller, J Libby, 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, TGH 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 Martiniz-Vidal, SMI Garcia, J Masik, N Mastroyiannopoulos, F Matorras, C Matteuzzi, G Matthiae, F 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, X Moreau, P Morettini, G Morton, U Mueller, K Muenich, M Mulders, C Mulet-Harquis, R Muresan, WJ Murray, B Muryn, G Myatt, T Myklebust, F Naraghi, M Nassiakou, FL Navarria, S Navas, K Nawrocki, P Negri, S Nemecek, N Neufeld, R Nicolaidou, BS Nielson, P Niezurawski, M Nikolenko, V Nomokonov, A Normand, A Nygren, V Obraztsov, AG Olshevski, A Onofre, R Orava, C Orazi, K Osterberg, A Ouraou, M Paganoni, S Paiano, R Pain, R Paiva, J Palacios, H Palka, TD Papadopoulou, K Papageorgiou, L Pape, C Parkes, F Parodi, C Parzefall, A Passeri, O Passon, 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, PN Ratoff, AL Read, P Rebecchi, NG Redaelli, M Regler, D Reid, R Reinhardt, PB Renton, LK Resvanis, F Richard, J Ridky, G Rinaudo, G Rodrigo, 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, H Schneider, P Schwemling, B Schwering, U Schwickerath, MAE Schyns, F Scuri, P Seager, Y Sedykh, AM Segar, R Sekulin, RC Shellard, A Sheridan, 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, P Sponholz, S Squarcia, C Stanescu, S Stanic, K Stevenson, A Stocchi, J Strauss, R Strub, B Stugu, M Szczekowski, M Szeptycka, T Tabarelli, F Tegenfeldt, F Terranova, J Thomas, J Timmermans, N Tinti, LG Tkatchev, S Todorova, A Tomaradze, B Tome, A Tonazzo, L Tortora, G Transtromer, D Treille, G Tristram, M Trochimezuk, C Troncon, A Tsirou, ML Turluer, IA Tyapkin, S Tzamarias, O Ullaland, V Uvarov, G Valenti, E Vallazza, C Vander Velde, GW Van Apeldoorn, P Van Dam, WK Van Doninck, J Van Eldik, A Van Lysebetten, N Van Remortel, I Van Vulpen, N Vassilopoulos, G Vegni, L Ventura, W Venus, F Verbeure, M Verlato, LS Vertogradov, V Verzi, D Vilanova, L Vitale, E Vlasov, AS Vodopyanov, C Vollmer, G Voulgaris, V Vrba, H Wahlen, C Walck, C Weiser, D Wicke, JH Wickens, GR Wilkinson, M Winter, M Witek, G Wolf, J Yi, O Yushchenko, A Zalewska, P Zalewski, D Zavtranik, E Zevgolatakos, NI Zimin, GC Zucchelli, G Zumerle