Measurement of the partial decay width R(b)(0)=Gamma(b(b)over-bar)/Gamma(had) of the Z with the DELPHI detector at LEP

Abreu, P; Adam, W; Adye, T; Agasi, E; Ajinenko, I; Aleksan, R; Alekseev, GD; Alemany, R; Allport, PP; Almehed, S; Amaldi, U; Amato, S; Andreazza, A; Andrieux, ML; Antilogus, P; Apel, WD; Arnoud, Y; Asman, B; Augustin, JE; Augustinus, A; Baillon, P; Bambade, P; Barao, F; Barate, R; Barbi, M; Bardin, DY; Baroncelli, A; Barring, O; Barrio, JA; Bartl, W; Bates, MJ; Battaglia, M; Baubillier, M; Baudot, J; Becks, KH; Begalli, M; Beilliere, P; Belokopytov, Y; Benvenuti, AC; Berggren, M; Bertrand, D; Bianchi, F; Bigi, M; Bilenky, MS; Billoir, P; Bloch, D; Blume, M; Blyth, S; Bolognese, T; Bonesini, M; Bonivento, W; Booth, PSL; Borisov, G; Bosio, C; Bosworth, S; Botner, O; Boudinov, E; Bouquet, B; Bourdarios, C; Bowcock, TJV; Bozzo, M; Branchini, P; Brand, KD; Brenke, T; Brenner, RA; Bricman, C; Brillault, L; Brown, RCA; Bruckman, P; Brunet, JM; Bugge, L; Buran, T; Burgsmueller, T; Buschmann, P; Buys, A; Cabrera, S; Caccia, M; Calvi, M; Rozas, AJC; Camporesi, T; Canale, V; Canepa, M; Cankocak, K; Cao, F; Carena, F; Carroll, L; Caso, C; Gimenez, MVC; Cattai, A; Cavallo, FR; Cerrito, L; Chabaud, V; Charpentier, P; Chaussard, L; Chauveau, J; Checchia, P; Chelkov, GA; Chen, M; Chierici, R; Chliapnikov, P; Chochula, P; Chorowicz, V; Chudoba, J; Cindro, V; Collins, P; Contreras, JL; Contri, R; Cortina, E; Cosme, G; Cossutti, F; Crawley, HB; Crennell, D; Crosetti, G; Maestro, JC; Czellar, S; DahlJensen, E; Dahm, J; Dalmagne, B; Dam, M; Damgaard, G; Dauncey, PD; Davenport, M; DaSilva, W; Defoix, C; Deghorain, A; DellaRicca, G; Delpierre, P; Demaria, N; DeAngelis, A; DeBoer, W; DeBrabandere, S; DeClercq, C; DelaVaissiere, C; DE LOTTO, Barbara; DeMin, A; DePaula, L; DeSaintJean, C; Dijkstra, H; DiCiaccio, L; Djama, F; Dolbeau, J; Donszelmann, M; Doroba, K; Dracos, M; Drees, J; Drees, KA; Dris, M; Dufour, Y; Edsall, D; Ehret, R; Eigen, G; Ekelof, T; Ekspong, G; Elsing, M; Engel, JP; Ershaidat, N; Erzen, B; Santo, ME; Falk, E; Fassouliotis, D; Feindt, M; Fenyuk, A; Ferrer, A; Filippas, TA; Firestone, A; Fischer, PA; Foeth, H; Fokitis, E; Fontanelli, F; Formenti, F; Franek, B; Frenkiel, P; Fries, DC; Frodesen, AG; Fruhwirth, R; FuldaQuenzer, F; Fuster, J; Galloni, A; Gamba, D; Gandelman, M; Garcia, C; Garcia, J; Gaspar, C; Gasparini, U; Gavillet, P; Gazis, EN; Gele, D; Gerber, JP; Gibbs, M; Gokieli, R; Golob, B; Gopal, G; Gorn, L; Gorski, M; Gouz, Y; Gracco, V; Graziani, E; Grosdidier, G; Grzelak, K; Gumenyuk, S; Gunnarsson, P; Gunther, M; Guy, J; Hahn, F; Hahn, S; Hajduk, Z; Hallgren, A; Hamacher, K; Hao, W; Harris, FJ; Hedberg, V; Henriques, R; Hernandez, JJ; Herquet, P; Herr, H; Hessing, TL; Higon, E; Hilke, HJ; Hill, TS; Holmgren, SO; Holt, PJ; Holthuizen, D; Hoorelbeke, S; Houlden, M; Hrubec, J; Huet, K; Hultqvist, K; Jackson, JN; Jacobsson, R; Jalocha, P; Janik, R; Jarlskog, C; Jarlskog, G; Jarry, P; JeanMarie, B; Johansson, EK; Jonsson, L; Jonsson, P; Joram, C; Juillot, P; Kaiser, M; Kapusta, F; Karafasoulis, K; Karlsson, M; Karvelas, E; Katargin, A; Katsanevas, S; Katsoufis, EC; Keranen, R; Khokhlov, Y; Khomenko, BA; Khovanski, NN; King, B; Kjaer, NJ; Klein, H; Klovning, A; Kluit, P; Koene, B; Kokkinias, P; Koratzinos, M; Korcyl, K; Kourkoumelis, C; Kouznetsov, O; Kramer, PH; Krammer, M; Kreuter, C; Kronkvist, I; Krumstein, Z; Krupinski, W; Kubinec, P; Kucewicz, W; Kurvinen, K; Lacasta, C; Laktineh, I; Lamblot, S; Lamsa, JW; Lanceri, L; Lane, DW; Langefeld, P; Last, I; Laugier, JP; Lauhakangas, R; Ledroit, F; Lefebure, V; Legan, CK; Leitner, R; Lemoigne, Y; Lemonne, J; Lenzen, G; Lepeltier, V; Lesiak, T; Liko, D; Lindner, R; Lipniacka, A; Lippi, I; Loerstad, B; Loken, JG; Lopez, JM; Loukas, D; Lutz, P; Lyons, L; MacNaughton, J; Maehlum, G; Maio, A; Malychev, V; Mandl, F; Marco, J; Marco, R; Marechal, B; Margoni, M; Marin, JC; Mariotti, C; Markou, A; Maron, T; MartinezRivero, C; MartinezVidal, F; Garcia, SMI; Masik, J; Matorras, F; Matteuzzi, C; Matthiae, G; Mazzucato, M; McCubbin, M; McKay, R; McNulty, R; Medbo, J; Merk, M; Meroni, C; Meyer, S; Meyer, WT; Miagkov, A; Michelotto, M; Migliore, E; Mirabito, L; Mitaroff, WA; Mjoernmark, U; Moa, T; Moeller, R; Moenig, K; Monge, MR; Morettini, P; Mueller, H; Mundim, LM; Murray, WJ; Muryn, B; Myatt, G; Naraghi, F; Navarria, FL; Navas, S; Nawrocki, K; Negri, P; Neumann, W; Neumeister, N; Nicolaidou, R; Nielsen, BS; Nieuwenhuizen, M; Nikolaenko, V; Niss, P; Nomerotski, A; Normand, A; OberschulteBeckmann, W; Obraztsov, V; Olshevski, AG; Onofre, A; Orava, R; Osterberg, K; Ouraou, A; Paganini, P; Paganoni, M; Pages, P; Palka, H; Papadopoulou, TD; Papageorgiou, K; Pape, L; Parkes, C; Parodi, F; Passeri, A; Pegoraro, M; Pernegger, H; Pernicka, M; Perrotta, A; Petridou, C; Petrolini, A; Petrovyck, M; Phillips, HT; Piana, G; Pierre, F; Pimenta, M; Pindo, M; Plaszczynski, S; Podobrin, O; Pol, ME; Polok, G; Poropat, P; Pozdniakov, V; Prest, M; Privitera, P; Pukhaeva, N; Pullia, A; Radojicic, D; Ragazzi, S; Rahmani, H; Rames, J; Ratoff, PN; Read, AL; Reale, M; Rebecchi, P; Redaelli, NG; Regler, M; Reid, D; Renton, PB; Resvanis, LK; Richard, F; Richardson, J; Ridky, J; Rinaudo, G; Ripp, I; Roncagliolo, I; Ronchese, P; Roos, L; Rosenberg, EI; Rosso, E; Roudeau, P; Rovelli, T; Ruckstuhl, W; RuhlmannKleider, V; Ruiz, A; Rybicki, K; Saarikko, H; Sacquin, Y; Sadovsky, A; Sajot, G; Salt, J; Sanchez, J; Sannino, M; Schimmelpfennig, M; Schneider, H; Schwickerath, U; Schyns, MAE; Sciolla, G; SCURI, Fabrizio; Seager, P; Sedykh, Y; Segar, AM; Seitz, A; Sekulin, R; Shellard, RC; Siccama, I; Siegrist, P; Simonetti, S; Simonetto, F; Sisakian, AN; Sitar, B; Skaali, TB; Smadja, G; Smirnov, N; Smirnova, O; Smith, GR; Solovianov, O; Sosnowski, R; SouzaSantos, D; Spassov, T; Spiriti, E; Sponholz, P; Squarcia, S; Stanescu, C; Stapnes, S; Stavitski, I; Stichelbaut, F; Stocchi, A; Strauss, J; Strub, R; Stugu, B; Szczekowski, M; Szeptycka, M; Tabarelli, T; Tavernet, JP; Tchikilev, O; Tilquin, A; Timmermans, J; Tkatchev, LG; Todorov, T; Toet, DZ; Tomaradze, A; Tome, B; Tonazzo, A; Tortora, L; Transtromer, G; Treille, D; Trischuk, W; Tristram, G; Trombini, A; Troncon, C; Tsirou, A; Turluer, ML; Tyapkin, IA; Tyndel, M; Tzamarias, S; Ueberschaer, B; Ullaland, O; Uvarov, V; Valenti, G; Vallazza, E; VanderVelde, C; VanApeldoorn, GW; VanDam, P; VanDoninck, WK; VanEldik, J; Vassilopoulos, N; Vegni, G; Ventura, L; Venus, W; Verbeure, F; Verlato, M; Vertogradov, LS; Vilanova, D; Vincent, P; Vitale, L; Vlasov, E; Vodopyanov, AS; Vrba, V; Wahlen, H; Walck, C; Waldner, F; Weierstall, M; Weilhammer, P; Weiser, C; Wetherell, AM; Wicke, D; Wickens, JH; Wielers, M; Wilkinson, GR; Williams, WSC; Winter, M; Witek, M; Woschnagg, K; Yip, K; Yushchenko, O; Zach, F; Zaitsev, A; Zalewska, A; Zalewski, P; Zavrtanik, D; Zevgolatakos, E; Zimin, NI; Zito, M; Zontar, D; Zuberi, R; Zucchelli, GC; Zumerle, G.

doi:10.1007/s002880050131

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The partial decay width of the Z to <b(b)over bar> quark pairs has been measured by the DELPHI detector at LEP. B-hadrons, containing b-quarks, were tagged by several methods using tracks with large impact parameters to the primary vertex complemented sometimes by event shape variables or using leptons with high transverse momentum relative to the hadron, In order to reduce the systematic uncertainties, in all methods the b-tagging efficiency has been extracted directly from the data. Combining all methods, the value: Gamma(<b(b)over bar>)/Gamma(had) = 0.2216 +/- 0.0016(stat.) +/- 0.0021(syst.) was found, where the <c(c)over bar> production fraction was fixed to its Standard Model value.

Titolo:	Measurement of the partial decay width R(b)(0)=Gamma(b(b)over-bar)/Gamma(had) of the Z with the DELPHI detector at LEP
Autori:	Abreu P Adam W Adye T Agasi E Ajinenko I Aleksan R Alekseev GD Alemany R Allport PP Almehed S Amaldi U Amato S Andreazza A Andrieux ML Antilogus P Apel WD Arnoud Y Asman B Augustin JE Augustinus A Baillon P Bambade P Barao F Barate R Barbi M Bardin DY Baroncelli A Barring O Barrio JA Bartl W Bates MJ Battaglia M Baubillier M Baudot J Becks KH Begalli M Beilliere P Belokopytov Y Benvenuti AC Berggren M Bertrand D Bianchi F Bigi M Bilenky MS Billoir P Bloch D Blume M Blyth S Bolognese T Bonesini M Bonivento W Booth PSL Borisov G Bosio C Bosworth S Botner O Boudinov E Bouquet B Bourdarios C Bowcock TJV Bozzo M Branchini P Brand KD Brenke T Brenner RA Bricman C Brillault L Brown RCA Bruckman P Brunet JM Bugge L Buran T Burgsmueller T Buschmann P Buys A Cabrera S Caccia M Calvi M Rozas AJC Camporesi T Canale V Canepa M Cankocak K Cao F Carena F Carroll L Caso C Gimenez MVC Cattai A Cavallo FR Cerrito L Chabaud V Charpentier P Chaussard L Chauveau J Checchia P Chelkov GA Chen M Chierici R Chliapnikov P Chochula P Chorowicz V Chudoba J Cindro V Collins P Contreras JL Contri R Cortina E Cosme G Cossutti F Crawley HB Crennell D Crosetti G Maestro JC Czellar S DahlJensen E Dahm J Dalmagne B Dam M Damgaard G Dauncey PD Davenport M DaSilva W Defoix C Deghorain A DellaRicca G Delpierre P Demaria N DeAngelis A DeBoer W DeBrabandere S DeClercq C DelaVaissiere C DE LOTTO, Barbara DeMin A DePaula L DeSaintJean C Dijkstra H DiCiaccio L Djama F Dolbeau J Donszelmann M Doroba K Dracos M Drees J Drees KA Dris M Dufour Y Edsall D Ehret R Eigen G Ekelof T Ekspong G Elsing M Engel JP Ershaidat N Erzen B Santo ME Falk E Fassouliotis D Feindt M Fenyuk A Ferrer A Filippas TA Firestone A Fischer PA Foeth H Fokitis E Fontanelli F Formenti F Franek B Frenkiel P Fries DC Frodesen AG Fruhwirth R FuldaQuenzer F Fuster J Galloni A Gamba D Gandelman M Garcia C Garcia J Gaspar C Gasparini U Gavillet P Gazis EN Gele D Gerber JP Gibbs M Gokieli R Golob B Gopal G Gorn L Gorski M Gouz Y Gracco V Graziani E Grosdidier G Grzelak K Gumenyuk S Gunnarsson P Gunther M Guy J Hahn F Hahn S Hajduk Z Hallgren A Hamacher K Hao W Harris FJ Hedberg V Henriques R Hernandez JJ Herquet P Herr H Hessing TL Higon E Hilke HJ Hill TS Holmgren SO Holt PJ Holthuizen D Hoorelbeke S Houlden M Hrubec J Huet K Hultqvist K Jackson JN Jacobsson R Jalocha P Janik R Jarlskog C Jarlskog G Jarry P JeanMarie B Johansson EK Jonsson L Jonsson P Joram C Juillot P Kaiser M Kapusta F Karafasoulis K Karlsson M Karvelas E Katargin A Katsanevas S Katsoufis EC Keranen R Khokhlov Y Khomenko BA Khovanski NN King B Kjaer NJ Klein H Klovning A Kluit P Koene B Kokkinias P Koratzinos M Korcyl K Kourkoumelis C Kouznetsov O Kramer PH Krammer M Kreuter C Kronkvist I Krumstein Z Krupinski W Kubinec P Kucewicz W Kurvinen K Lacasta C Laktineh I Lamblot S Lamsa JW Lanceri L Lane DW Langefeld P Last I Laugier JP Lauhakangas R Ledroit F Lefebure V Legan CK Leitner R Lemoigne Y Lemonne J Lenzen G Lepeltier V Lesiak T Liko D Lindner R Lipniacka A Lippi I Loerstad B Loken JG Lopez JM Loukas D Lutz P Lyons L MacNaughton J Maehlum G Maio A Malychev V Mandl F Marco J Marco R Marechal B Margoni M Marin JC Mariotti C Markou A Maron T MartinezRivero C MartinezVidal F Garcia SMI Masik J Matorras F Matteuzzi C Matthiae G Mazzucato M McCubbin M McKay R McNulty R Medbo J Merk M Meroni C Meyer S Meyer WT Miagkov A Michelotto M Migliore E Mirabito L Mitaroff WA Mjoernmark U Moa T Moeller R Moenig K Monge MR Morettini P Mueller H Mundim LM Murray WJ Muryn B Myatt G Naraghi F Navarria FL Navas S Nawrocki K Negri P Neumann W Neumeister N Nicolaidou R Nielsen BS Nieuwenhuizen M Nikolaenko V Niss P Nomerotski A Normand A OberschulteBeckmann W Obraztsov V Olshevski AG Onofre A Orava R Osterberg K Ouraou A Paganini P Paganoni M Pages P Palka H Papadopoulou TD Papageorgiou K Pape L Parkes C Parodi F Passeri A Pegoraro M Pernegger H Pernicka M Perrotta A Petridou C Petrolini A Petrovyck M Phillips HT Piana G Pierre F Pimenta M Pindo M Plaszczynski S Podobrin O Pol ME Polok G Poropat P Pozdniakov V Prest M Privitera P Pukhaeva N Pullia A Radojicic D Ragazzi S Rahmani H Rames J Ratoff PN Read AL Reale M Rebecchi P Redaelli NG Regler M Reid D Renton PB Resvanis LK Richard F Richardson J Ridky J Rinaudo G Ripp I Roncagliolo I Ronchese P Roos L Rosenberg EI Rosso E Roudeau P Rovelli T Ruckstuhl W RuhlmannKleider V Ruiz A Rybicki K Saarikko H Sacquin Y Sadovsky A Sajot G Salt J Sanchez J Sannino M Schimmelpfennig M Schneider H Schwickerath U Schyns MAE Sciolla G SCURI, Fabrizio Seager P Sedykh Y Segar AM Seitz A Sekulin R Shellard RC Siccama I Siegrist P Simonetti S Simonetto F Sisakian AN Sitar B Skaali TB Smadja G Smirnov N Smirnova O Smith GR Solovianov O Sosnowski R SouzaSantos D Spassov T Spiriti E Sponholz P Squarcia S Stanescu C Stapnes S Stavitski I Stichelbaut F Stocchi A Strauss J Strub R Stugu B Szczekowski M Szeptycka M Tabarelli T Tavernet JP Tchikilev O Tilquin A Timmermans J Tkatchev LG Todorov T Toet DZ Tomaradze A Tome B Tonazzo A Tortora L Transtromer G Treille D Trischuk W Tristram G Trombini A Troncon C Tsirou A Turluer ML Tyapkin IA Tyndel M Tzamarias S Ueberschaer B Ullaland O Uvarov V Valenti G Vallazza E VanderVelde C VanApeldoorn GW VanDam P VanDoninck WK VanEldik J Vassilopoulos N Vegni G Ventura L Venus W Verbeure F Verlato M Vertogradov LS Vilanova D Vincent P Vitale L Vlasov E Vodopyanov AS Vrba V Wahlen H Walck C Waldner F Weierstall M Weilhammer P Weiser C Wetherell AM Wicke D Wickens JH Wielers M Wilkinson GR Williams WSC Winter M Witek M Woschnagg K Yip K Yushchenko O Zach F Zaitsev A Zalewska A Zalewski P Zavrtanik D Zevgolatakos E Zimin NI Zito M Zontar D Zuberi R Zucchelli GC Zumerle G. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1996
Rivista:	ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS
Citazione:	Measurement of the partial decay width R(b)(0)=Gamma(b(b)over-bar)/Gamma(had) of the Z with the DELPHI detector at LEP / Abreu P; Adam W; Adye T; Agasi E; Ajinenko I; Aleksan R; Alekseev GD; Alemany R; Allport PP; Almehed S; Amaldi U; Amato S; Andreazza A; Andrieux ML; Antilogus P; Apel WD; Arnoud Y; Asman B; Augustin JE; Augustinus A; Baillon P; Bambade P; Barao F; Barate R; Barbi M; Bardin DY; Baroncelli A; Barring O; Barrio JA; Bartl W; Bates MJ; Battaglia M; Baubillier M; Baudot J; Becks KH; Begalli M; Beilliere P; Belokopytov Y; Benvenuti AC; Berggren M; Bertrand D; Bianchi F; Bigi M; Bilenky MS; Billoir P; Bloch D; Blume M; Blyth S; Bolognese T; Bonesini M; Bonivento W; Booth PSL; Borisov G; Bosio C; Bosworth S; Botner O; Boudinov E; Bouquet B; Bourdarios C; Bowcock TJV; Bozzo M; Branchini P; Brand KD; Brenke T; Brenner RA; Bricman C; Brillault L; Brown RCA; Bruckman P; Brunet JM; Bugge L; Buran T; Burgsmueller T; Buschmann P; Buys A; Cabrera S; Caccia M; Calvi M; Rozas AJC; Camporesi T; Canale V; Canepa M; Cankocak K; Cao F; Carena F; Carroll L; Caso C; Gimenez MVC; Cattai A; Cavallo FR; Cerrito L; Chabaud V; Charpentier P; Chaussard L; Chauveau J; Checchia P; Chelkov GA; Chen M; Chierici R; Chliapnikov P; Chochula P; Chorowicz V; Chudoba J; Cindro V; Collins P; Contreras JL; Contri R; Cortina E; Cosme G; Cossutti F; Crawley HB; Crennell D; Crosetti G; Maestro JC; Czellar S; DahlJensen E; Dahm J; Dalmagne B; Dam M; Damgaard G; Dauncey PD; Davenport M; DaSilva W; Defoix C; Deghorain A; DellaRicca G; Delpierre P; Demaria N; DeAngelis A; DeBoer W; DeBrabandere S; DeClercq C; DelaVaissiere C; DeLotto B; DeMin A; DePaula L; DeSaintJean C; Dijkstra H; DiCiaccio L; Djama F; Dolbeau J; Donszelmann M; Doroba K; Dracos M; Drees J; Drees KA; Dris M; Dufour Y; Edsall D; Ehret R; Eigen G; Ekelof T; Ekspong G; Elsing M; Engel JP; Ershaidat N; Erzen B; Santo ME; Falk E; Fassouliotis D; Feindt M; Fenyuk A; Ferrer A; Filippas TA; Firestone A; Fischer PA; Foeth H; Fokitis E; Fontanelli F; Formenti F; Franek B; Frenkiel P; Fries DC; Frodesen AG; Fruhwirth R; FuldaQuenzer F; Fuster J; Galloni A; Gamba D; Gandelman M; Garcia C; Garcia J; Gaspar C; Gasparini U; Gavillet P; Gazis EN; Gele D; Gerber JP; Gibbs M; Gokieli R; Golob B; Gopal G; Gorn L; Gorski M; Gouz Y; Gracco V; Graziani E; Grosdidier G; Grzelak K; Gumenyuk S; Gunnarsson P; Gunther M; Guy J; Hahn F; Hahn S; Hajduk Z; Hallgren A; Hamacher K; Hao W; Harris FJ; Hedberg V; Henriques R; Hernandez JJ; Herquet P; Herr H; Hessing TL; Higon E; Hilke HJ; Hill TS; Holmgren SO; Holt PJ; Holthuizen D; Hoorelbeke S; Houlden M; Hrubec J; Huet K; Hultqvist K; Jackson JN; Jacobsson R; Jalocha P; Janik R; Jarlskog C; Jarlskog G; Jarry P; JeanMarie B; Johansson EK; Jonsson L; Jonsson P; Joram C; Juillot P; Kaiser M; Kapusta F; Karafasoulis K; Karlsson M; Karvelas E; Katargin A; Katsanevas S; Katsoufis EC; Keranen R; Khokhlov Y; Khomenko BA; Khovanski NN; King B; Kjaer NJ; Klein H; Klovning A; Kluit P; Koene B; Kokkinias P; Koratzinos M; Korcyl K; Kourkoumelis C; Kouznetsov O; Kramer PH; Krammer M; Kreuter C; Kronkvist I; Krumstein Z; Krupinski W; Kubinec P; Kucewicz W; Kurvinen K; Lacasta C; Laktineh I; Lamblot S; Lamsa JW; Lanceri L; Lane DW; Langefeld P; Last I; Laugier JP; Lauhakangas R; Ledroit F; Lefebure V; Legan CK; Leitner R; Lemoigne Y; Lemonne J; Lenzen G; Lepeltier V; Lesiak T; Liko D; Lindner R; Lipniacka A; Lippi I; Loerstad B; Loken JG; Lopez JM; Loukas D; Lutz P; Lyons L; MacNaughton J; Maehlum G; Maio A; Malychev V; Mandl F; Marco J; Marco R; Marechal B; Margoni M; Marin JC; Mariotti C; Markou A; Maron T; MartinezRivero C; MartinezVidal F; Garcia SMI; Masik J; Matorras F; Matteuzzi C; Matthiae G; Mazzucato M; McCubbin M; McKay R; McNulty R; Medbo J; Merk M; Meroni C; Meyer S; Meyer WT; Miagkov A; Michelotto M; Migliore E; Mirabito L; Mitaroff WA; Mjoernmark U; Moa T; Moeller R; Moenig K; Monge MR; Morettini P; Mueller H; Mundim LM; Murray WJ; Muryn B; Myatt G; Naraghi F; Navarria FL; Navas S; Nawrocki K; Negri P; Neumann W; Neumeister N; Nicolaidou R; Nielsen BS; Nieuwenhuizen M; Nikolaenko V; Niss P; Nomerotski A; Normand A; OberschulteBeckmann W; Obraztsov V; Olshevski AG; Onofre A; Orava R; Osterberg K; Ouraou A; Paganini P; Paganoni M; Pages P; Palka H; Papadopoulou TD; Papageorgiou K; Pape L; Parkes C; Parodi F; Passeri A; Pegoraro M; Pernegger H; Pernicka M; Perrotta A; Petridou C; Petrolini A; Petrovyck M; Phillips HT; Piana G; Pierre F; Pimenta M; Pindo M; Plaszczynski S; Podobrin O; Pol ME; Polok G; Poropat P; Pozdniakov V; Prest M; Privitera P; Pukhaeva N; Pullia A; Radojicic D; Ragazzi S; Rahmani H; Rames J; Ratoff PN; Read AL; Reale M; Rebecchi P; Redaelli NG; Regler M; Reid D; Renton PB; Resvanis LK; Richard F; Richardson J; Ridky J; Rinaudo G; Ripp I; Roncagliolo I; Ronchese P; Roos L; Rosenberg EI; Rosso E; Roudeau P; Rovelli T; Ruckstuhl W; RuhlmannKleider V; Ruiz A; Rybicki K; Saarikko H; Sacquin Y; Sadovsky A; Sajot G; Salt J; Sanchez J; Sannino M; Schimmelpfennig M; 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C, PARTICLES AND FIELDS. - ISSN 0170-9739. - 70:4(1996), pp. 531-547.
Abstract:	The partial decay width of the Z to <b(b)over bar> quark pairs has been measured by the DELPHI detector at LEP. B-hadrons, containing b-quarks, were tagged by several methods using tracks with large impact parameters to the primary vertex complemented sometimes by event shape variables or using leptons with high transverse momentum relative to the hadron, In order to reduce the systematic uncertainties, in all methods the b-tagging efficiency has been extracted directly from the data. Combining all methods, the value: Gamma(<b(b)over bar>)/Gamma(had) = 0.2216 +/- 0.0016(stat.) +/- 0.0021(syst.) was found, where the <c(c)over bar> production fraction was fixed to its Standard Model value.
Handle:	http://hdl.handle.net/11390/884146
Appare nelle tipologie:	1.1 Articolo in rivista

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