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Determination of A(...
Determination of A(FB)(b) at the Z pole using inclusive charge reconstruction and lifetime tagging
- Article/chapterEnglish2005
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Springer Science and Business Media LLC,2005
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LIBRIS-ID:oai:lup.lub.lu.se:e9ec4249-8e75-43e0-8d09-6be4c20946e2
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https://lup.lub.lu.se/record/227546URI
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https://doi.org/10.1140/epjc/s2004-02104-0DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
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A novel high precision method measures the b-quark forward-backward asymmetry at the Z pole on a sample of 3,560,890 hadronic events collected with the DELPHI detector in 1992 to 2000. An enhanced impact parameter tag provides a high purity b sample. For event hemispheres with a reconstructed secondary vertex the charge of the corresponding quark or anti-quark is determined using a neural network which combines in an optimal way the full available charge information from the vertex charge, the jet charge and from identified leptons and hadrons. The probability of correctly identifying b-quarks and anti-quarks is measured on the data themselves comparing the rates of double hemisphere tagged like-sign and unlike-sign events. The b-quark forward-backward asymmetry is determined from the differential asymmetry, taking small corrections due to hemisphere correlations and background contributions into account. The results for different centre-of-mass energies are: A(FB)(b) ( 89.449 GeV) = 0.0637 +/- 0.0143( stat.) +/- 0.0017( syst.), A(FB)(b) ( 91.231 GeV) = 0.0958 +/- 0.0032( stat.) +/- 0.0014( syst.), A(FB)(b) ( 92.990 GeV) = 0.1041 +/- 0.0115( stat.) +/- 0.0024( syst.). Combining these results yields the b-quark pole asymmetry A(FB)(b0) = 0.0972 +/- 0.0030( stat.) +/- 0.0014( syst.).
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Abreu, P
(author)
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Adam, W
(author)
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Adzic, P
(author)
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Albrecht, T
(author)
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Alderweireld, T
(author)
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Alemany-Fernandez, R
(author)
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Allmendinger, T
(author)
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Allport, PP
(author)
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Amaldi, U
(author)
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Amapane, N
(author)
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Amato, S
(author)
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Anashkin, E
(author)
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Andreazza, A
(author)
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Andringa, S
(author)
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Anjos, N
(author)
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Antilogus, P
(author)
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Apel, WD
(author)
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Arnoud, Y
(author)
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Ask, StefanLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)quar-sas
(author)
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Asman, B
(author)
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Augustin, JE
(author)
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Augustinus, A
(author)
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Baillon, P
(author)
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Ballestrero, A
(author)
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Bambade, P
(author)
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Barbier, R
(author)
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Bardin, D
(author)
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Barker, G
(author)
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Baroncelli, A
(author)
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Battaglia, M
(author)
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Baubillier, M
(author)
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Becks, KH
(author)
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Begalli, M
(author)
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Behrmann, A
(author)
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Ben-Haim, E
(author)
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Benekos, N
(author)
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Benvenuti, A
(author)
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Berat, C
(author)
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Berggren, M
(author)
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Berntzon, L
(author)
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Bertrand, D
(author)
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Besancon, M
(author)
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Besson, N
(author)
-
Bloch, D
(author)
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Blom, M
(author)
-
Bluj, M
(author)
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Bonesini, M
(author)
-
Boonekamp, M
(author)
-
Booth, PSL
(author)
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Borisov, G
(author)
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Botner, O
(author)
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Bouquet, B
(author)
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Bowcock, TJV
(author)
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Boyko, I
(author)
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Bracko, M
(author)
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Brenner, R
(author)
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Brodet, E
(author)
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Bruckman, P
(author)
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Brunet, JM
(author)
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Buschmann, P
(author)
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Calvi, M
(author)
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Camporesi, T
(author)
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Canale, V
(author)
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Carena, F
(author)
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Castro, N
(author)
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Cavallo, F
(author)
-
Chapkin, M
(author)
-
Charpentier, P
(author)
-
Checchia, P
(author)
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Chierici, R
(author)
-
Chliapnikov, P
(author)
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Chudoba, J
(author)
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Chung, SU
(author)
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Cieslik, K
(author)
-
Collins, P
(author)
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Contri, R
(author)
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Cosme, G
(author)
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Cossutti, F
(author)
-
Costa, MJ
(author)
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Crennell, D
(author)
-
Cuevas, J
(author)
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D'Hondt, J
(author)
-
Dalmau, J
(author)
-
da Silva, T
(author)
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Da Silva, W
(author)
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Della Ricca, G
(author)
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De Angelis, A
(author)
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De Boer, W
(author)
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De Clercq, C
(author)
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De Lotto, B
(author)
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De Maria, N
(author)
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De Min, A
(author)
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de Paula, L
(author)
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Di Ciaccio, L
(author)
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Di Simone, A
(author)
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Doroba, K
(author)
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Drees, J
(author)
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Dris, M
(author)
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Eigen, G
(author)
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Ekelof, T
(author)
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Ellert, M
(author)
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Elsing, M
(author)
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Santo, MCE
(author)
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Fanourakis, G
(author)
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Fassouliotis, D
(author)
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Feindt, M
(author)
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Fernandez, J
(author)
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Ferrer, A
(author)
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Ferro, F
(author)
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Flagmeyer, U
(author)
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Foeth, H
(author)
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Fokitis, E
(author)
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Fulda-Quenzer, F
(author)
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Fuster, J
(author)
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Gandelman, M
(author)
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Garcia, C
(author)
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Gavillet, P
(author)
-
Gazis, E
(author)
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Gokieli, R
(author)
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Golob, B
(author)
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Gomez-Ceballos, G
(author)
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Goncalves, P
(author)
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Graziani, E
(author)
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Grosdidier, G
(author)
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Grzelak, K
(author)
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Guy, J
(author)
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Haag, C
(author)
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Hallgren, A
(author)
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Hamacher, K
(author)
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Hamilton, K
(author)
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Haug, S
(author)
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Hauler, F
(author)
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Hedberg, VincentLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)quar-vhe
(author)
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Hennecke, M
(author)
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Herr, H
(author)
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Hoffman, J
(author)
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Holmgren, SO
(author)
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Holt, PJ
(author)
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Houlden, MA
(author)
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Hultqvist, K
(author)
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Jackson, JN
(author)
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Jarlskog, GöranLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)quar-gja
(author)
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Jarry, P
(author)
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Jeans, D
(author)
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Johansson, EK
(author)
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Johansson, PD
(author)
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Jonsson, P
(author)
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Joram, C
(author)
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Jungermann, L
(author)
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Kapusta, F
(author)
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Katsanevas, S
(author)
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Katsoufis, E
(author)
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Kernel, G
(author)
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Kersevan, BP
(author)
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Kerzel, U
(author)
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Kiiskinen, A
(author)
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King, BT
(author)
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Kjaer, NJ
(author)
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Kluit, P
(author)
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Kokkinias, P
(author)
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Kourkoumelis, C
(author)
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Kouznetsov, O
(author)
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Krumstein, Z
(author)
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Kucharczyk, M
(author)
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Lamsa, J
(author)
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Leder, G
(author)
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Ledroit, F
(author)
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Leinonen, L
(author)
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Leitner, R
(author)
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Lemonne, J
(author)
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Lepeltier, V
(author)
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Lesiak, T
(author)
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Liebig, W
(author)
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Liko, D
(author)
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Lipniacka, A
(author)
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Lopes, JH
(author)
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Lopez, JM
(author)
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Loukas, D
(author)
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Lutz, P
(author)
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Lyons, L
(author)
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MacNaughton, J
(author)
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Malek, A
(author)
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Maltezos, S
(author)
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Mandl, F
(author)
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Marco, J
(author)
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Marco, R
(author)
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Marechal, B
(author)
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Margoni, M
(author)
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Marin, JC
(author)
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Mariotti, C
(author)
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Markou, A
(author)
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Martinez-Rivero, C
(author)
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Masik, J
(author)
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Mastroyiannopoulos, N
(author)
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Matorras, F
(author)
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Matteuzzi, C
(author)
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Mazzucato, F
(author)
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Mazzucato, M
(author)
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Mc Nulty, R
(author)
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Meroni, C
(author)
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Migliore, E
(author)
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Mitaroff, W
(author)
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Mjörnmark, UlfLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)quar-umj
(author)
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Moa, T
(author)
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Moch, M
(author)
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Moenig, K
(author)
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Monge, R
(author)
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Montenegro, J
(author)
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Moraes, D
(author)
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Moreno, S
(author)
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Morettini, P
(author)
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Mueller, U
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Muenich, K
(author)
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Mulders, M
(author)
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Mundim, L
(author)
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Murray, W
(author)
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Muryn, B
(author)
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Myatt, G
(author)
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Myklebust, T
(author)
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Nassiakou, M
(author)
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Navarria, F
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Nawrocki, K
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Pierre, F
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Podobnik, T
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Pol, ME
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Polok, G
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Siebel, M
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Sisakian, A
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Smadja, G
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Smirnova, OxanaLund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)quar-osm
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Abdallah, J
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Abreu, P
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Adam, W
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Adzic, P
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Albrecht, T
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Alderweireld, T
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Alemany-Fernande ...
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Allmendinger, T
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Allport, PP
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Amaldi, U
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Amapane, N
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Amato, S
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Anashkin, E
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Andreazza, A
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Andringa, S
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Anjos, N
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Antilogus, P
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Apel, WD
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Arnoud, Y
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Ask, Stefan
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Asman, B
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Augustin, JE
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Augustinus, A
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Baillon, P
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Ballestrero, A
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Bambade, P
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Barbier, R
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Bardin, D
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Barker, G
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Baroncelli, A
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Battaglia, M
-
Baubillier, M
-
Becks, KH
-
Begalli, M
-
Behrmann, A
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Ben-Haim, E
-
Benekos, N
-
Benvenuti, A
-
Berat, C
-
Berggren, M
-
Berntzon, L
-
Bertrand, D
-
Besancon, M
-
Besson, N
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Bloch, D
-
Blom, M
-
Bluj, M
-
Bonesini, M
-
Boonekamp, M
-
Booth, PSL
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Borisov, G
-
Botner, O
-
Bouquet, B
-
Bowcock, TJV
-
Boyko, I
-
Bracko, M
-
Brenner, R
-
Brodet, E
-
Bruckman, P
-
Brunet, JM
-
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, SU
-
Cieslik, K
-
Collins, P
-
Contri, R
-
Cosme, G
-
Cossutti, F
-
Costa, MJ
-
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
-
Dris, M
-
Eigen, G
-
Ekelof, T
-
Ellert, M
-
Elsing, M
-
Santo, MCE
-
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
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Gomez-Ceballos, ...
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Goncalves, P
-
Graziani, E
-
Grosdidier, G
-
Grzelak, K
-
Guy, J
-
Haag, C
-
Hallgren, A
-
Hamacher, K
-
Hamilton, K
-
Haug, S
-
Hauler, F
-
Hedberg, Vincent
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Hennecke, M
-
Herr, H
-
Hoffman, J
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Holmgren, SO
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Holt, PJ
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Houlden, MA
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Hultqvist, K
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Jackson, JN
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Jarlskog, Göran
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Jarry, P
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Jeans, D
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Johansson, EK
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Johansson, PD
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Jonsson, P
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Joram, C
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Jungermann, L
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Kapusta, F
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Katsanevas, S
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Katsoufis, E
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Kernel, G
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Kersevan, BP
-
Kerzel, U
-
Kiiskinen, A
-
King, BT
-
Kjaer, NJ
-
Kluit, P
-
Kokkinias, P
-
Kourkoumelis, C
-
Kouznetsov, O
-
Krumstein, Z
-
Kucharczyk, M
-
Lamsa, J
-
Leder, G
-
Ledroit, F
-
Leinonen, L
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Leitner, R
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Lemonne, J
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Lepeltier, V
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Lesiak, T
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Liebig, W
-
Liko, D
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Lipniacka, A
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