Measurement of the b forward-backward asymmetry and mixing using high-p⊥ leptons

Buskulic, D.; Debonis, I; Décamp, D.; Ghez, Ph.; Goy, C.; Lees, J. P.; Lucotte, A.; Minard, M.-N.; Odier, P.; Pietrzyk, B.; Casado, M. P.; Chmeissani, M.; Crespo, J.M.; Delfino, M.; Efthymiopoulos, I.; Fernández, E.; Fernández-Bosman, M.; Garrido, Ll.; Rozas, A. Juste; Martı́nez, M.; Orten, S; Pacheco, A.; Aranda, C. Padilla; Pascual, Á.; Perlas, J. A.; Riu, I.; Sanchez, F. J. Munoz; Teubert, F.; Coaleo, A; Creanza, D.; Depalma, M; Gelao, G.; Girone, M.; Iaselli, G.; Mäggi, G.; Maggi, M.; Marinelli, N.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Zito, G.; Huang, X. T.; Lin, J.; Ouyang, Q.; Wang, T; Xie, Y.; Ru, Xiaohu; Xue, S.; Zhang, J; Zhang, L; Zhao, W.; Alemany, R.; Bazarko, A.O.; Bonvicini, G.; Cattaneo, M.; Comas, P.; Coyle, P.; Drevermann, H.; Forty, R.; Frank, M.; Hagelberg, R.; Harvey, J.; Janot, P.; Jost, B.; Kneringer, E.; Knobloch, J.; Lehraus, I.; Martin, E. B.; Mató, P.; Minten, A.; Miquel, R.; Mir, L. M.; Moneta, L.; Oest, T.; Palla, F.; Pater,; Pusztaszeri, J. F.; Ranjard, F.; Rensing, P.; Rolandi, G.; Schlatter, D.; Schmelling, M.; Schneider, O.; Tejessy, W.; Tomalin, I. R.; Venturi, A.; Wachsmuth, H.; Wagner, A.; Wildish, T.; Ajaltouni, Z.; Barrès, A.; Boyer, C.; Falvard, A.; Guicheney, C.; Henrard, P.; Jousset, J.; Michel, B.; Monteil, S.; Montret, J. C.; Pallin, D.; Perret, P.; Podlyski, F.; Proriol, J.; Rossignol, J. M.; Fearnley, T.; Hansen, J. R.; Hansen, Richard A.; Hansen, P. H.; Nilsson, B.S.; Wäänänen, A.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Siotis, I.; Vayaki, A.; Zachariadou, K.; Blondel, A.; Bonneaud, G. R.; Brient, J. C.; Bourdon, P.; Rougé, A.; Rumpf, M.; Valassi, A.; Verderi, M.; Videau, H.; Candlin, D. J.; Parsons, M. I.; Focardi, E.; Parrini, G.; Corden, M.; Georgiopoulos, C.; Jaffe, D. E.; Antonelli, A.; Bencivenni, G.; Bologna, G.; Bossi, F.; Campana, P.; Capon, G.; Casper, D.; Chiarella, V.; Felici, G.; Laurelli, P.; Mannocchi, C; Murtas, F.; Murtas, F.; Passalacqua, L.; Pepe-Altarelli, M.; Curtis, L.; Dorris, S. J.; Halley, A.W.; Knowles, I. G.; Lynch, J.G.; O'Shea,; Raine, C.; Reeves, P.; Scarr, J. M.; Smith, K. M.; Thompson, A. S.; Thomson, F.; Thorn, S.; Turnbull, R.M.; Becker, U.; Geweniger, C.; Graefe, G.; Hanke, P.; Hansper, G.; Hepp,; Kluge, E. E.; Putzer, A.; Rensch, B.; Schmidt, Michael G.; Sommer, J.; Stenzel, H.; Tittel, K.; Werner, S.; Wunsch, M.; Abbaneo, D.; Beuselinck, R.; Binnie, D. M.; Cameron, W.; Dornan, P. J.; Moutoussi, A.; Nash, J.; Sedgbeer, J. K.; Stacey, A. M.; Williams, Stefan B.; Dissertori, G.; Girtler, P.; Kühn, D.; Rudolph, G.; Betteridge, A. P.; Bowdery, C. K.; Colrain, P.; Crawford, G.; Finch, A. J.; Foster, E; Hughes, G.; Sloan, T.; Williams, M.I.; Galla, A.; Greene, A. M.; Kleinknecht, K.; Quast, G.; Renk, B.; Rohne, E.; Sander, H. G.; vanGemmeren, P; Zeitnitz, C.; Aubert, J.J.; Bencheikh, A. M.; Benchouk, C.; Bonissent, A.; Bujosa, C; Calvet, D.; Carr, J.; Diaconu, C.; Etienne, F.; Konstantinidis, N.; Payre, P.; Rousseau, D.; Talby, M.; Sadouki, A.; Thulasidas, M.; Trabelsi, K.; Aleppo, M.; Ragusa, F.; Abt, I.; Assmann, R.; Bauer, C.; Blum, W.; Diet, H; Dydak, F.; Ganis, G.; Gotzhein, C.; Jakobs, K.; Kroh, H; Lütjens, G.; Lütz, G.; Männer, W.; Moser, H. G.; Richter, R.; Rosado-Schlosser, A.; Schael, S.; Settles, R.; Seywerd, H.; Stdenis, R; Wiedenmann, W.; Wolf, G.; Boucrot, J.; Callot, O.; Cordier, A.; Davier, M.; Duflot, L.; Grivaz, J.-F.; Heusse, P.; Jacquet, M.; Dw, Kim; Lediberder, F; Lefrançois, J.; Lutz, A. M.; Nikolić, Irena; Hj, Park; Park, IC; Schune, M. H.; Simion, S.; Veillet, J. J.; Videau, I.; Azzurri, P.; Bagliesi, G.; Batignani, G.; Bettarini, S.; Bozzi, C.; Calderini, G.; Carpinelli, M.; Ciocci, M. A.; Ciulli, V.; Dell’Orso, R.; Fantechi, R.; Ferrante, I.; Foà, L.; Forti, F.; Giassi, A.; Giorgi, M. A.; Gregorio, A.; Ligabue, F.; Lusiani, A.; Marrocchesi, P. S.; Messineo, A.; Rizzo, G.; Sanguinetti, G.; Sciabà, A.; Spagnolo, P.; Steinberger, J.; Тенчини, Р.; Tonelli, G.; Vannini, C.; Verdini, P. G.; Walsh, J.; Blair, G.A.; Bryant, L. M.; Cerutti, F.; Chambers, J.T.; Green, MG; Medcalf, T.; Perrodo, P.; Strong, J. A.; vonWimmerspergToeller, JH; Botterill,; Clifft, R. W.; Edgecock, T.R.; Haywood, S. J.; Maley, P.; Norton, P. R.; Thompson, J.C.; Wright, A.E.; Bloch-Devaux, B.; Colas, P.; Emery, S.; Kozanecki, W.; Lançon, E.; Lemaire, M. C.; Locci, E.; Marx, B.; Pérez, P.; Rander, J.; Renard, JF; Roussarie, A.; Schuller, J. P.; Schwindling, J.; Trabelsi, A.; Vallage, B.; Black, S.N.; Dann, J.H.; Johnson, R.P.; Kima, HY; Litke, A. M.; McNeil, M.A.; Taylor, G. N.; Booth, C.N.; Boswell, Rod; Brew, C.; Cartwright, S.; Combley, F.; Koksal, A.; Letho, M.; Newton, W. M.; Reeve, J.; Thompson, L.F.; Böhrer, A.; Brandt, Siegmund; Buscher,; Cowan, G.; Grupen, C.; Lutters, G.; Minguet-Rodriguez, J.; Rivera, F.; Saraiva, Pedro; Smolík, L.; Stephan, E.; Apollonio, M.; Bosisio, L.; Dellamarina, R; Giannini, G.; Gobbo, B.; Musolino, G.; Rothberg, J.; Wasserbaech, S.; Armstrong, Steven R.; Bellantoni, L.; Elmer, P.; Feng, Z.; Ferguson, D.P.S.; Gao, Y. S.; González, S.; Grahl, J.; Greening, T.C.; Harton, J. L.; Hayes, O.J.; Hu, H.; McNamara, P.A.; Nachtman, J. M.; Orejudos, W.; Pan, Y.; Saadi, Y.; Schmitt, M.; Scott, I.; Sharma, Vivek; Walsh, A. M.; Wu, S. L.; Wu, X.; Yamartino, J. M.; Zheng, M.; Zobernig, G.

doi:10.1016/0370-2693(96)00926-4

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…This underestimate of the background in the Monte Carlo, by a factor of three, remains when both tracks are further required to cross the ight path of the B hadron candidate downstream of the interaction point. The origin of this discrepancy is not fully understood, but a large fraction of it can be attributed to a previously observed excess of tracks with high transverse momentum relative to their jet axes observed in the data with respect to Monte Carlo predictions [13]. In the present analysis when only the kinematic cuts are applied the Monte Carlo underestimates the data by a factor of 1.6, which explains only a part of the eect.…”

Section: Resultscontrasting

confidence: 37%

Observation of charmless hadronic B decays

Buskulic¹,

Bonis²,

Décamp³

et al. 1996

Physics Letters B

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Section: Resultscontrasting

confidence: 37%

Observation of charmless hadronic B decays

Buskulic¹,

Bonis²,

Décamp³

et al. 1996

Physics Letters B

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“…3, are determined by the method reported in Ref. [8], but with the uds component of the background inated to take i n to account the discrepancies observed between data and Monte Carlo [17]. The uncertainties inherent to this procedure are included in the systematic error ( 25%) on the total background fraction, which is assumed comparable to the overall correction (+22%).…”

Section: Event Selection and Sample Compositionmentioning

confidence: 99%

Improved measurement of the $B^0_d$ - $\overline{B}^0_d$ oscillation frequency

Buskulic¹,

Bonis²,

Décamp³

et al. 1997

Zeitschrift f�r Physik C Particles and Fields

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The time dependence of B 0 d {B 0 d oscillations is measured by the ALEPH experiment a t L E P , using three techniques, two of which are updates of previous measurements. In all cases the charge of the decaying b quark and its decay time are measured in one hemisphere of the event; the quark charge at production is tagged mainly using the opposite hemisphere. The rst method uses the charge correlation between a D and a lepton in the opposite hemisphere; if no lepton is present, the produced quark charge is determined from the hemisphere charges. The second employs a new method in which the decay time is measured using a lepton in one hemisphere and the initial state is inferred from the opposite-hemisphere jet charge. The third method uses a lepton in each hemisphere. The combined result is m d = 0 : 4360:033 ps 1 .

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Measurements of the b quark forward-backward asymmetry around the Z $^0$ peak using jet charge and vertex charge

Ackerstaff

Alexander

Allison

et al. 1997

Zeitschrift f�r Physik C Particles and Fields

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The b quark forward-backward asymmetry has been measured using approximately four million hadronic Z 0 decays collected with the OPAL detector at LEP. Both jet charge and vertex charge were used to estimate whether the b quark was produced in the forward or backward thrust hemisphere. The measured values corrected to the hadronlevel thrust axis are A b FB = 0.041 ±0.021 ±0.002 √ s = 89.44 GeV A b FB = 0.0994 ±0.0052 ±0.0044 √ s = 91.21 GeV A b FB = 0.145 ±0.017 ±0.007 √ s = 92.91 GeV where in each case the first error is statistical and the second systematic. Within the framework of the Standard Model these measurements correspond to an effective weak mixing angle of sin 2 θ eff,e W = 0.2308 ± 0.0013. The measurements are in agreement with the Standard Model and other measurements at LEP.

show abstract

Measurement of the b forward-backward asymmetry and mixing using high-p⊥ leptons

Cited by 11 publications

References 32 publications

Observation of charmless hadronic B decays

Observation of charmless hadronic B decays

Improved measurement of the $B^0_d$ - $\overline{B}^0_d$ oscillation frequency

Measurements of the b quark forward-backward asymmetry around the Z $^0$ peak using jet charge and vertex charge

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