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1. Determination of the b quark mass at the Mz scale with the DELPHI detector at LEP

Author

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

Subjects
High Energy Physics::Experiment
Abstract

An experimental study of the normalized three-jet rate of b quark events with respect to light quarks events (light = l ≡ u,d,s) has been performed using the CAMBRIDGE and DURHAM jet algorithms. The data used were collected by the DELPHI experiment at LEP on the Z peak from 1994 to 2000. The results are found to agree with theoretical predictions treating mass corrections at next-to-leading order. Measurements of the b quark mass have also been performed for both the b pole mass: Mb and the b running mass: m b(MZ). Data are found to be better described when using the running mass. The measurement yields: mb(MZ) = 2.85±0.18(stat) ±0.13(exp)±0.19(had) ±0.12(theo) GeV/c2. for the CAMBRIDGE algorithm. This result is the most precise measurement of the b mass derived from a high energy process. When compared to other b mass determinations by experiments at lower energy scales, this value agrees with the prediction of quantum chromodynamics for the energy evolution of the running mass. The mass measurement is equivalent to a test of the flavour independence of the strong coupling constant with an accuracy of 7 ‰.

Published
2006

2. Determination of the b quark mass at the Mz scale with the DELPHI detector at LEP

Author

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

Abstract

An experimental study of the normalized three-jet rate of b quark events with respect to light quarks events (light = l ≡ u,d,s) has been performed using the CAMBRIDGE and DURHAM jet algorithms. The data used were collected by the DELPHI experiment at LEP on the Z peak from 1994 to 2000. The results are found to agree with theoretical predictions treating mass corrections at next-to-leading order. Measurements of the b quark mass have also been performed for both the b pole mass: Mb and the b running mass: m b(MZ). Data are found to be better described when using the running mass. The measurement yields: mb(MZ) = 2.85±0.18(stat) ±0.13(exp)±0.19(had) ±0.12(theo) GeV/c2. for the CAMBRIDGE algorithm. This result is the most precise measurement of the b mass derived from a high energy process. When compared to other b mass determinations by experiments at lower energy scales, this value agrees with the prediction of quantum chromodynamics for the energy evolution of the running mass. The mass measurement is equivalent to a test of the flavour independence of the strong coupling constant with an accuracy of 7 ‰.

Published
2006

3. Determination of the b quark mass at the M-Z scale with the DELPHI detector at LEP

Author

Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., Alemany Fernandez, R., Allmendinger, T., Allport, P. P., Amaldi, U., Amapane, N., Amato, S., Anashkin, E., Andreazza, A., Andringa, S., Anjos, N., Antilogus, P., Ape, W. D., Arnoud, Y., Ask, S., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Ballestrero, A., Bambade, P., Barbier, R., Bardin, D., Barker, G. J., Baroncelli, A., Battaglia, M., Baubillier, M., Becks, K. H., Begallis, M., Behrmann, A., Ben Haim, E., Benekos, N., Benvenuti, A., Berat, C., Berggren, M., Berntzon, L., Bertrand, D., Besancono, M., Besson, N., Bloch, D., Blom, M., Bluj, M., Bonesini, M., Boonekamp, M., P. S. L., Borisov, G., Botner, O., Bouquet, B., T. J. V., Boyko, I., Bracko, M., Brenner, R., Brodet, E., Bruckman, P., Brunet, J. M., Buschmann, P., Calvi, M., Camporesi, T., Canale, V., Carena, F., Castro, N., Cavallo, F., Chapkin, M., Charpentier, P., Checchia, P., Chierici, R., Chliapnikov, P., Chudoba, J., Chung, S. U., Cieslik, K., Collins, P., Contri, R., Cosme, G., Cossutti, F., Costa, M. J., Crennell, D., Cuevas, J., D'Hondt, J., Dalmau, J., Silva, T. d., Silva, W. D., Ricca, G. D., Angelis, A. D., Boer, W. D., Clercq, C. D., Lotto, B. D., Maria, N. D., Min, A. D., Paula, L. D., Ciaccio, L. D., Simone, A. D., Doroba, K., Drees, J., Eigen, G., Ekelof, T., Ellert, M., Elsing, M., Espirito, M. C., Fanourakis, G., Fassouliotis, D., Feindt, M., Fernandez, J., Ferrer, A., Ferro, F., Flagmeyer, U., Foeth, H., Fokitis, E., Fulda Quenzer, F., Fuster, J., Gandelman, M., Garcia, C., Gavillet, P., Gazis, E., Gokieli, R., Golob, B., Gomez Ceballos, G., Goncalves, P., Graziani, E., Grosdidier, G., Grzelak, K., Guy, J., Haag, C., Hallgren, A., Hamacher, K., Hamilton, K., Haug, S., Hauler, F., Hedberg, V., Hennecke, M., Herr, H., Hoffman, J., Holmgren, S. O., Holt, P. J., Houlden, M. A., Hultqvist, K., Jackson, J. N., Jarlskog, G., Jarry, P., Jeans, D., Johansson, E. K., Johansson, P. D., Jonsson, P., Joram, C., Jungermann, L., Kapusta, F., Katsanevas, S., Katsoufis, E., Kernel, G., Kersevan, B. P., Kerzel, U., King, B. T., Kjaer, N. J., Kluit, P., Kokkinias, P., Kourkoumelis, C., Kouznetsov, O., Krumstein, Z., Kucharczyk, M., Lamsa, J., Leder, G., Ledroit, F., Leinonen, L., Leitner, R., Lemonne, J., Lepeltier, V., Lesiak, T., Liebig, W., Liko, D., Lipniacka, A., Lopes, J. H., Lopez, J. M., Loukas, D., Lutzo, P., Lyons, L., Macnaughton, J., Malek, A., Maltezos, S., Mandl, F., Marco, J., Marco, R., Marechal, B., Margoni, M., Marin, J. C., Mariotti, C., Markou, A., Martinez Rivero, C., Masik, J., Mastroyiannopoulos, N., Matorras, F., Matteuzzi, C., Mazzucato, F., Mazzucato, M., Nulty, R. M., Meroni, C., Mighore, E., Mitaroff, W., Mjoernmark, U., Moa, T., Moch, M., Moenig, K., Monge, MARIA ROBERTA, Montenegro, J., Moraes, D., Moreno, S., Morettini, P., Mueller, U., Muenich, K., Mulders, M., Mundim, L., Murray, W., Muryn, B., Myatt, G., Myklebust, T., Nassiakou, M., Navarria, F., Nawrocki, K., Nicolaidou, R., Nikolenko, M., Oblakowska Mucha, A., Obraztsov, V., Oishevski, A., Onofre, A., Orava, R., Osterberg, K., Ouraouo, A., Oyanguren, A., Paganoni, M., Paiano, S., Palacios, J. P., Palka, H., Papadopoulou, T. D., Pape, L., Parkes, C., Parodi, Fabrizio, Parzefall, U., Passeri, A., Passon, O., Peralta, L., Perepelitsa, V., Perrotta, A., Petrolini, Alessandro, Piedra, J., Pieri, L., Pierre, F., Pimenta, M., Piotto, E., Podobnik, T., Poireau, V., Pol, M. E., Polok, G., Pozdniakov, V., Pukhaeva, N., Pullia, A., Rames, J., Read, A., Rebecchi, P., Rehn, J., Reid, D., Reinhardt, R., Renton, P., Richard, F., Ridky, J., Rivero, M., Rodriguez, D., Romero, A., Ronchese, P., Roudeau, P., Rovelli, T., Ruhlmann Kleider, V., Ryabtchikov, D., Sadovsky, A., Salmi, L., Salt, J., Sander, C., Savoy Navarro, A., Schwickerath, U., Segar, A., Sekulin, R., Siebel, M., Sisakian, A., Smadja, G., Smirnova, O., Sokolov, A., Sopczak, A., Sosnowski, R., Spassov, T., Stanitzki, M., Stocchi, A., Strauss, J., Stugu, B., Szczekowski, M., Szeptycka, M., Szumlak, T., Tabarelli, T., Taffard, A. C., Tegenfeldt, F., Timmermans, J., Tkatchev, L., Tobin, M., Todorovova, S., Tome, B., Tonazzo, A., Tortosa, P., Travnicek, P., Treille, D., Tristram, G., Trochimczuk, M., Troncon, C., Turluer, M. L., Tyapkin, I. A., Tyapkin, P., Tzamarias, S., Uvarov, V., Valenti, G., Dam, P. V., Eldik, J. V., Remortel, N. V., Vulpen, I. V., Vegni, G., Veloso, F., Venus, W., Verdier, P., Verzi, V., Vilanova, D., Vitale, L., Vrba, V., Wahlen, H., Washbrook, A. J., Weiser, C., Wicke, D., Wickens, J., Wilkinson, G., Winter, M., Witek, M., Yushchenko, O., Zalewska, A., Zalewski, P., Zavrtanik, D., Zhuravlov, V., Zimin, N. I., Zintchenko, A., Zupan, M., Collaboration, D., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de l'Accélérateur Linéaire (LAL), 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), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), DELPHI, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), 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), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), DELPHI Collaboration, J. 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Subjects
Quark, Particle physics, Physics and Astronomy (miscellaneous), Flavour, FOS: Physical sciences, Scale (descriptive set theory), Jet (particle physics), 01 natural sciences, 7. Clean energy, Bottom quark, DECAYS, High Energy Physics - Experiment, CROSS-SECTIONS, High Energy Physics - Experiment (hep-ex), RATIO, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Z0, 010306 general physics, ANNIHILATION, Engineering (miscellaneous), DELPHI, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Detector, High Energy Physics::Phenomenology, LEP, PHYSICS EVENT GENERATION, QCD CORRECTIONS, HEAVY QUARKS, LARGE ELECTRON POSITRON COLLIDER, PARTICLE PHYSICS, B-QUARK, Strong coupling, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

An experimental study of the normalized three-jet rate of b quark events with respect to light quarks events (light= \ell \equiv u,d,s) has been performed using the CAMBRIDGE and DURHAM jet algorithms. The data used were collected by the DELPHI experiment at LEP on the Z peak from 1994 to 2000. The results are found to agree with theoretical predictions treating mass corrections at next-to-leading order. Measurements of the b quark mass have also been performed for both the b pole mass: M_b and the b running mass: m_b(M_Z). Data are found to be better described when using the running mass. The measurement yields: m_b(M_Z) = 2.85 +/- 0.18 (stat) +/- 0.13 (exp) +/- 0.19 (had) +/- 0.12 (theo) GeV/c^2 for the CAMBRIDGE algorithm. This result is the most precise measurement of the b mass derived from a high energy process. When compared to other b mass determinations by experiments at lower energy scales, this value agrees with the prediction of Quantum Chromodynamics for the energy evolution of the running mass. The mass measurement is equivalent to a test of the flavour independence of the strong coupling constant with an accuracy of 7 permil., Comment: 24 pages, 10 figures, Accepted by Eur. Phys. J. C

Published
2006

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