Guy Wilkinson: Publications

Search for bs0-B̄s0 oscillations in delphi using high-pt leptons; The delphi collaboration

European Physical Journal C 35:1 (2004) 35-52

Authors:

Abstract:

Oscillations in the Bs⁰-Bs⁰ system were studied in events selected from about 4.3 million hadronic Z ⁰ decays registered by DELPHI between 1992 and 2000. This paper presents updates of two published analyses ([11,12]). The first analysis, which utilizes leptons emitted with large momentum transverse to a jet, was improved by means of a better algorithm for the vertex reconstuction and a new algorithm for flavour-tagging at production time. The second analysis, which utilizes Ds-lepton events, was improved by optimizing the treatment of proper time resolution. No signal of B⁰ oscillations was observed and limits on the mass difference between the physical B⁰ states were obtained to be: δms > 8.0ps^-1 at the 95% C.L. with a sensitivity of δms = 9.1 ps^-1 in the high pt lepton analysis and δms < 4.9 ps-1 at the 95% C.L. with a sensitivity of δms = 8.6 ps^-1 in the D s-lepton analysis. Previously published results on these analyses are superseded. The combination of these results with those obtained in other independent analyses previously performed in DELPHI (Ds-hadron, exclusive Bs⁰, inclusive vertex) gives: δm, > 8.5 ps^-1 at the 95% C.L. with a sensitivity of δms = 12.0 ps-1.

b-tagging in DELPHI at LEP

European Physical Journal C 32:2 (2004) 185-208

Authors:

P Abreu, W Adam, T Adye, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, PP Allport, S Almehed, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, S Ask, B Asman, JE Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, G Barker, A Baroncelli, M Bates, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, J Bibby, P Biffi, D Bloch, M Blom, M Bonesini, M Boonekamp, PSL Booth, G Borisov, O Botner, B Bouquet, TJV Bowcock, I Boyko, M Bracko, P Branchini, R Brenner, E Brodet, P Bruckman, JM Brunet, L Bugge, P Buschmann, M Caccia, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, V Chabaud, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, SU Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, MJ Costa, F Couchot, B Crawley, D Crennell, J Cuevas, B D'Almagne, J D'Hondt, J Dalmau, T da Silva, W da Silva, G della Ricca, A de Angelis, W de Boer, C de Clercq, B de Lotto

Abstract:

The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly.

b-tagging in DELPHI at LEP (vol 32, pg 185, 2004)

EUROPEAN PHYSICAL JOURNAL C 32:2 (2004) 299-301

Authors:

J Abdallah, P Abreu, W Adam, T Adye, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, PP Allport, S Almehed, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, S Ask, B Asman, JE Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, G Barker, A Baroncelli, M Bates, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, J Bibby, P Biffi, D Bloch, M Blom, M Bonesini, M Boonekamp, PSL Booth, G Borisov, O Botner, B Bouquet, TJV Bowcock, I Boyko, M Bracko, P Branchini, R Brenner, E Brodet, P Bruckman, JM Brunet, L Bugge, P Buschmann, M Caccia, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, V Chabaud, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, SU Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, MJ Costa, F Couchot, B Crawley, D Crennell, J Cuevas, B D'Almagne, J D'Hondt, J Dalmau, T da Silva, W Da Silva, G Della Ricca, A De Angelis, W De Boer, C De Clercq, B De Lotto, N De Maria, A De Min, L de Paula, L Di Ciaccio, H Dijkstra, A Di Simone, K Doroba, J Drees, M Dris, G Eigen, T Ekelof, M Ellert, M Elsing, MCE Santo, G Fanourakis, D Fassouliotis, M Feindt, J Fernandez, A Ferrer, F Ferro, U Flagmeyer, H Foeth, E Fokitis, F Fulda-Quenzer, J Fuster, M Gandelman, C Garcia, P Gavillet, E Gazis, T Geralis, R Gokieli, B Golob, JJG Cadenas, G Gomez-Ceballos, P Goncalves, E Graziani, G Grosdidier, K Grzelak, J Guy, C Haag, A Hallgren, K Hamacher, K Hamilton, J Hansen, S Haug, F Hauler, V Hedberg, M Hennecke, JA Hernando, H Herr, J Heuser, SO Holmgren, PJ Holt, MA Houlden, K Hultqvist, JN Jackson, P Jalocha, C Jarlskog, G Jarlskog, P Jarry, D Jeans, EK Johansson, PD Johansson, P Jonsson, C Joram, L Jungermann, F Kapusta, M Karlsson, S Katsanevas, E Katsoufis, R Keranen, G Kernel, BP Kersevan, A Kiiskinen, BT King, NJ Kjaer, P Kluit, P Kokkinias, C Kourkoumelis, O Kouznetsov, Z Krumstein, M Kucharczyk, W Kucewicz, J Kurowska, J Lamsa, G Leder, F Ledroit, L Leinonen, R Leitner, J Lemonne, V Lepeltier, T Lesiak, W Liebig, D Liko, A Lipniacka, JH Lopes, JM Lopez, D Loukas, P Lutz, L Lyons, J MacNaughton, A Malek, S Maltezos, F Mandl, J Marco, R Marco, B Marechal, M Margoni, JC Marin, C Mariotti, A Markou, C Martinez-Rivero, F Martinez-Vidal, J Masik, N Mastroyiannopoulos, F Matorras, C Matteuzzi, F Mazzucato, M Mazzucato, R Mc Nulty, C Meroni, WT Meyer, E Migliore, W Mitaroff, U Mjoernmark, T Moa, M Moch, K Moenig, R Monge, J Montenegro, D Moraes, S Moreno, P Morettini, U Mueller, K Muenich, M Mulders, L Mundim, W Murray, B Muryn, G Myatt, T Myklebust, M Nassiakou, F Navarria, K Nawrocki, R Nicolaidou, P Niezurawski, M Nikolenko, A Nomerotski, A Norman, A Nygren, A Oblakowska-Mucha, V Obraztsov, A Olshevski, A Onofre, R Orava, K Osterberg, A Ouraou, A Oyanguren, M Paganoni, S Paiano, JP Palacios, H Palka, TD Papadopoulou, L Pape, C Parkes, F Parodi, U Parzefall, A Passeri, O Passon, L Peralta, V Perepelitsa, A Perrotta, A Petrolini, J Piedra, L Pieri, F Pierre, M Pimenta, E Piotto, T Podobnik, V Poireau, ME Pol, G Polok, P Poropat, V Pozdniakov, N Pukhaeva, A Pullia, J Rames, L Ramler, A Read, P Rebecchi, J Rehn, D Reid, R Reinhardt, P Renton, F Richard, J Ridky, M Rivero, D Rodriguez, A Romero, P Ronchese, E Rosenberg, P Roudeau, T Rovelli, V Ruhlmann-Kleider, D Ryabtchikov, A Sadovsky, L Salmi, J Salt, A Savoy-Navarro, U Schwickerath, A Segar, R Sekulin, M Siebel, A Sisakian, G Smadja, O Smirnova, A Sokolov, A Sopczak, R Sosnowski, T Spassov, M Stanitzki, I Stavitski, A Stocchi, J Strauss, B Stugu, M Szczekowski, M Szeptycka, T Szumlak, T Tabarelli, AC Taffard, F Tegenfeldt, J Timmermans, N Tinti, L Tkatchev, M Tobin, S Todorovova, A Tomaradze, B Tome, A Tonazzo, P Tortosa, P Travnicek, D Treille, W Trischuk, G Tristram, M Trochimczuk, C Troncon, ML Turluer, IA Tyapkin, P Tyapkin, M Tyndel, S Tzamarias, V Uvarov, G Valenti, P Van Dam, J Van Eldik, A Van Lysebetten, N van Remortel, I Van Vulpen, G Vegni, F Veloso, W Venus, F Verbeure, P Verdier, V Verzi, D Vilanova, L Vitale, V Vrba, H Wahlen, AJ Washbrook, P Weilhammer, C Weiser, D Wicke, J Wickens, G Wilkinson, M Winter, M Witek, O Yushchenko, A Zalewska, P Zalewski, D Zavrtanik, NI Zimin, A Zintchenko, M Zupan

A precise measurement of the tau lifetime

EUROPEAN PHYSICAL JOURNAL C 36:3 (2004) 283-296

Authors:

J Abdallah, P Abreu, W Adam, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, P Allport, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, S Ask, B Asman, E Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, J Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, E Ben-Haim, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, D Bloch, M Blom, M Bluj, M Bonesini, M Boonekamp, L Booth, G Borisov, O Botner, B Bouquet, V Bowcock, I Boyko, M Bracko, R Brenner, E Brodet, P Bruckman, M Brunet, L Bugge, P Buschmann, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, U Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, J Costa, D Crennell, J Cuevas, J D'Hondt, J Dalmau, T da Silva, W Da Silva, G Della Ricca, A De Angelis, W De Boer, C De Clercq, B De Lotto, N De Maria, A De Min, L de Paula, L Di Ciaccio, A Di Simone, K Doroba, J Drees, M Dris, G Eigen, T Ekelof, M Ellert, M Elsing, CE Santo, G Fanourakis, D Fassouliotis, M Feindt, J Fernandez, A Ferrer, F Ferro, U Flagmeyer, H Foeth, E Fokitis, F Fulda-Quenzer, J Fuster, M Gandelman, C Garcia, P Gavillet, E Gazis, R Gokieli, B Golob, G Gomez-Ceballos, P Goncalves, E Graziani, G Grosdidier, K Grzelak, J Guy, C Haag, A Hallgren, K Hamacher, K Hamilton, S Haug, F Hauler, V Hedberg, M Hennecke, H Herr, J Hoffman, SO Holmgren, J Holt, A Houlden, K Hultqvist, N Jackson, G Jarlskog, P Jarry, D Jeans, K Johansson, D Johansson, P Jonsson, C Joram, L Jungermann, F Kapusta, S Katsanevas, E Katsoufis, G Kernel, P Kersevan, U Kerzel, A Kiiskinen, T King, J Kjaer, P Kluit, P Kokkinias, C Kourkoumelis, O Kouznetsov, Z Krumstein, M Kucharczyk, J Lamsa, G Leder, F Ledroit, L Leinonen, R Leitner, J Lemonne, V Lepeltier, T Lesiak, W Liebig, D Liko, A Lipniacka, H Lopes, M Lopez, D Loukas, P Lutz, L Lyons, J MacNaughton, A Malek, S Maltezos, F Mandl, J Marco, R Marco, B Marechal, M Margoni, JC Marin, C Mariotti, A Markou, C Martinez-Rivero, J Masik, N Mastroyiannopoulos, F Matorras, C Matteuzzi, F Mazzucato, M Mazzucato, R Mc Nulty, C Meroni, E Migliore, W Mitaroff, U Mjoernmark, T Moa, M Moch, K Moenig, R Monge, J Montenegro, D Moraes, S Moreno, P Morettini, U Mueller, K Muenich, M Mulders, L Mundim, W Murray, B Muryn, G Myatt, T Myklebust, M Nassiakou, F Navarria, K Nawrocki, R Nicolaidou, M Nikolenko, A Oblakowska-Mucha, V Obraztsov, A Olshevski, A Onofre, R Orava, K Osterberg, A Ouraou, A Oyanguren, M Paganoni, S Paiano, P Palacios, H Palka, D Papadopoulou, L Pape, C Parkes, F Parodi, U Parzefall, A Passeri, O Passon, L Peralta, V Perepelitsa, A Perrotta, A Petrolini, J Piedra, L Pieri, F Pierre, M Pimenta, E Piotto, T Podobnik, V Poireau, E Pol, G Polok, V Pozdniakov, N Pukhaeva, A Pullia, J Rames, A Read, P Rebecchi, J Rehn, D Reid, R Reinhardt, P Renton, F Richard, J Ridky, M Rivero, D Rodriguez, A Romero, P Ronchese, P Roudeau, T Rovelli, V Ruhlmann-Kleider, D Ryabtchikov, A Sadovsky, L Salmi, J Salt, C Sander, A Savoy-Navarro, U Schwickerath, A Segar, R Sekulin, M Siebel, A Sisakian, G Smadja, O Smirnova, A Sokolov, A Sopczak, R Sosnowski, T Spassov, M Stanitzki, A Stocchi, J Strauss, B Stugu, M Szczekowski, M Szeptycka, T Szumlak, T Tabarelli, C Taffard, F Tegenfeldt, J Timmermans, L Tkatchev, M Tobin, S Todorovova, B Tome, A Tonazzo, P Tortosa, P Travnicek, D Treille, G Tristram, M Trochimczuk, C Troncon, ML Turluer, A Tyapkin, P Tyapkin, S Tzamarias, V Uvarov, G Valenti, P Van Dam, J Van Eldik, A Van Lysebetten, N van Remortel, I Vanvulpen, G Vegni, F Veloso, W Venus, P Verdier, V Verzi, D Vilanova, L Vitale, V Vrba, H Wahlen, J Washbrook, C Weiser, D Wicke, J Wickens, G Wilkinson, M Winter, M Witek, O Yushchenko, A Zalewska, P Zalewski, D Zavrtanik, V Zhuravlov, I Zimin, A Zintchenko, M Zupan

A precise measurement of the B⁺, B⁰ and mean b-hadron lifetime with the DELPHI detector at LEP I

EUROPEAN PHYSICAL JOURNAL C 33:3 (2004) 307-324

Authors:

J Abdallah, P Abreu, W Adam, P Adzic, T Albrecht, T Alderweireld, R Alemany-Fernandez, T Allmendinger, P Allport, U Amaldi, N Amapane, S Amato, E Anashkin, A Andreazza, S Andringa, N Anjos, P Antilogus, WD Apel, Y Arnoud, S Ask, B Asman, E Augustin, A Augustinus, P Baillon, A Ballestrero, P Bambade, R Barbier, D Bardin, GJ Barker, A Baroncelli, M Battaglia, M Baubillier, KH Becks, M Begalli, A Behrmann, E Ben-Haim, N Benekos, A Benvenuti, C Berat, M Berggren, L Berntzon, D Bertrand, M Besancon, N Besson, D Bloch, M Blom, M Bluj, M Bonesini, M Boonekamp, L Booth, G Borisov, O Botner, B Bouquet, V Bowcock, I Boyko, M Bracko, R Brenner, E Brodet, P Bruckman, M Brunet, L Bugge, P Buschmann, M Calvi, T Camporesi, V Canale, F Carena, N Castro, F Cavallo, M Chapkin, P Charpentier, P Checchia, R Chierici, P Chliapnikov, J Chudoba, U Chung, K Cieslik, P Collins, R Contri, G Cosme, F Cossutti, J Costa, B Crawley, D Crennell, J Cuevas, J D'Hondt, J Dalmau, T da Silva, W Da Silva, G Della Ricca, A De Angelis, W De Boer, C De Clercq, B De Lotto, N De Maria, A De Min, L de Paula, L Di Ciaccio, A Di Simone, K Doroba, J Drees, M Dris, G Eigen, T Ekelof, M Ellert, M Elsing, CE Santo, G Fanourakis, D Fassouliotis, M Feindt, J Fernandez, A Ferrer, F Ferro, U Flagmeyer, H Foeths, E Fokitis, F Fulda-Quenzer, J Fuster, M Gandelman, C Garcia, P Gavillet, E Gazis, R Gokieli, B Golob, G Gomez-Ceballos, P Goncalves, E Graziani, G Grosdidier, K Grzelak, J Guy, C Haag, A Hallgren, K Hamacher, K Hamilton, J Hansen, S Haug, F Hauler, V Hedberg, M Hennecke, H Herr, J Hoffman, SO Holmgren, J Holt, A Houlden, K Hultqvist, N Jackson, G Jarlskog, P Jarry, D Jeans, K Johansson, D Johansson, P Jonsson, C Joram, L Jungermann, F Kapusta, S Katsanevas, E Katsoufis, G Kernel, P Kersevan, A Kiiskinen, T King, J Kjaer, P Kluit, P Kokkinias, C Kourkoumelis, O Kouznetsov, Z Krumstein, M Kucharczyk, J Lamsa, G Leder, F Ledroit, L Leinonen, R Leitner, J Lemonne, V Lepeltier, T Lesiak, W Liebig, D Liko, A Lipniacka, H Lopes, M Lopez, D Loukas, P Lutz, L Lyons, J MacNaughton, A Malek, S Maltezos, F Mandl, J Marco, R Marco, B Marechal, M Margoni, JC Marin, C Mariotti, A Markou, C Martinez-Rivero, J Masik, N Mastroyiannopoulos, F Matorras, C Matteuzzi, F Mazzucato, M Mazzucato, R McNulty, C Meroni, T Meyer, E Migliore, W Mitaroff, U Mjoernmark, T Moa, M Moch, K Moenig, R Monge, J Montenegro, D Moraes, S Moreno, P Morettini, U Mueller, K Muenich, M Mulders, L Mundim, W Murray, B Muryn, G Myatt, T Myklebust, M Nassiakou, F Navarria, K Nawrocki, R Nicolaidou, M Nikolenko, A Oblakowska-Mucha, V Obraztsov, A Olshevski, A Onofre, R Orava, K Osterberg, A Ouraou, A Oyanguren, M Paganoni, S Paiano, P Palacios, H Palka, D Papadopoulou, L Pape, C Parkes, F Parodi, U Parzefall, A Passeri, O Passon, L Peralta, V Perepelitsa, A Perrotta, A Petrolini, J Piedra, L Pieri, F Pierre, M Pimenta, E Piotto, T Podobnik, V Poireau, E Pol, G Polok, P Poropat, V Pozdniakov, N Pukhaeva, A Pullia, J Rames, L Ramler, A Read, P Rebecchi, J Rehn, D Reid, R Reinhardt, P Renton, F Richard, J Ridky, M Rivero, D Rodriguez, A Romero, P Ronchese, E Rosenberg, P Roudeau, T Rovelli, V Ruhlmann-Kleider, D Ryabtchikov, A Sadovsky, L Salmi, J Salt, A Savoy-Navarro, U Schwickerath, A Segar, R Sekulin, M Siebel, A Sisakian, G Smadja, O Smirnova, A Sokolov, A Sopczak, R Sosnowski, T Spassov, M Stanitzki, A Stocchi, J Strauss, B Stugu, M Szczekowski, M Szeptycka, T Szumlak, T Tabarelli, C Taffard, F Tegenfeldt, J Timmermans, L Tkatchev, M Tobin, S Todorovova, B Tome, A Tonazzo, P Tortosa, P Travnicek, D Treille, G Tristram, M Trochimczuk, C Troncon, ML Turluer, A Tyapkin, P Tyapkin, S Tzamarias, V Uvarov, G Valenti, P Van Dam, J Van Eldik, A Van Lysebetten, N van Remortel, I Van Vulpen, G Vegni, F Veloso, W Venus, F Verbeure, P Verdier, V Verzi, D Vilanova, L Vitale, V Vrba, H Wahlen, J Washbrook, C Weiser, D Wicke, J Wickens, G Wilkinson, M Winter, M Witek, O Yushchenko, A Zalewska, P Zalewski, D Zavrtanik, V Zhuravlov, I Zimin, A Zintchenko, M Zupan

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Guy Wilkinson

Sub department

Search for bs0-B̄s0 oscillations in delphi using high-pt leptons; The delphi collaboration

Authors:

Abstract:

b-tagging in DELPHI at LEP

Authors:

Abstract:

b-tagging in DELPHI at LEP (vol 32, pg 185, 2004)

Authors:

A precise measurement of the tau lifetime

Authors:

A precise measurement of the B⁺, B⁰ and mean b-hadron lifetime with the DELPHI detector at LEP I

Authors:

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Guy Wilkinson

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Search for bs0-B̄s0 oscillations in delphi using high-pt leptons; The delphi collaboration

Authors:

Abstract:

b-tagging in DELPHI at LEP

Authors:

Abstract:

b-tagging in DELPHI at LEP (vol 32, pg 185, 2004)

Authors:

A precise measurement of the tau lifetime

Authors:

A precise measurement of the B+, B0 and mean b-hadron lifetime with the DELPHI detector at LEP I

Authors:

A precise measurement of the B⁺, B⁰ and mean b-hadron lifetime with the DELPHI detector at LEP I