Showing papers by "Achim Geiser published in 1994"

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Measurement of $b \bar{b}$ correlations at the CERN $p \bar{p}$ collider

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Carmen Albajar¹, K. Ankoviak², S. Bartha³, A. Bezaguet¹, A. Böhrer⁴, K. Bos, C. D. Buchanan², B. Buschbeck, H. Castilla-Valdez², P. Cennini¹, Sergio Cittolin¹, E. F. Clayton⁵, David B. Cline², J. A. Caughlan⁶, D. Dau³, C. Daum, M. Della Negra¹, M. Demoulin¹, Daniel Denegri, H. Dibon, J. Dorenbosch, J. D. Dowell⁷, K. Eggert¹, E. Eisenhandler⁸, Nicolas Ellis¹, Nicolas Ellis⁷, H. Evans², H. Faissner⁴, I. F. Fensome⁷, L. Fortson², J. Garvey⁷, Achim Geiser⁴, Achim Geiser¹, Alain Givernaud¹, A. Gonidec¹, B. Gonzalez², J. Gronberg², D. J. Holthuizen, W. Jank¹, G. Jorat¹, P. I. P. Kalmus⁸, Veikko Karimäki⁹, I. R. Kenyon⁷, Ritva Kinnunen⁹, Manfred Krammer, S. Lammel⁴, M. P. J. Landon⁸, Y. Lemoigne, S. Levegrün³, Peter Lipa, C. Markou⁵, M. Markytan, G. Maurin¹, Steve McMahon⁵, Jean-Pierre Merlo, T.I. Meyer¹, T. Moers⁴, M. Mohammadi², Andreas Morsch³, Andreas Morsch¹, A. Moulin⁴, A. Norton¹, S. Otwinowski², G. Pancheri¹⁰, E. Pietarinen⁹, M. Pimiä⁹, A. Placci¹, J. P. Porte¹, R. Priem⁴, R. Prosi³, E. Radermacher¹, M. Rauschkolb³, Hans Reithler⁴, J. P. Revol¹⁰, J. P. Revol¹, Dave Robinson⁸, C. Rubbia¹, D. Samyn¹, D. Schinzel¹, R. Schleichert⁴, Matthias Schröder, Christopher Seez⁵, T.P. Shah⁶, P. Sphicas¹⁰, Konstanty Sumorok¹⁰, F. Szoncso, C.H. Tan¹⁰, Anton Taurok, L. Taylor⁵, S. Tether¹⁰, H. Teykal⁴, G. Thompson⁸, H. Tuchscherer⁴, Jorma Tuominiemi⁹, W. van de Guchte, A. van Dijk, M. Vargas², Tejinder Virdee⁵, W. von Schlippe⁸, V. Vuillemin¹, K. Wacker⁴, H. Wagner⁴, G. Walzel, C.-E. Wulz, Pierluigi Zotto¹ - Show less +101 more•Institutions (10)

CERN¹, University of California, Los Angeles², University of Kiel³, RWTH Aachen University⁴, Imperial College London⁵, Rutherford Appleton Laboratory⁶, University of Birmingham⁷, Queen Mary University of London⁸, University of Helsinki⁹, Massachusetts Institute of Technology¹⁰

01 Mar 1994-European Physical Journal C

TL;DR: In this paper, measurements of correlated b-bar b-mixing were reported, using dimuon data to tag both the b and b-b-quark quarks, and the measured cross-sections and correlations were compared to higher-order QCD predictions.

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Abstract: We report on measurements of correlated$b\bar b$ production in$p\bar p$ collisions at$\sqrt s = 630GeV$, using dimuon data to tag both theb and$\bar b$ quarks. Starting from an inclusive dimuon sample we obtain improved cross-sections for single inclusive beauty production and confirm our earlier results on$B^0 - \bar B^0$ mixing. From a study of$b\bar b$ correlations we derive explicit cross-sections for semi-differential$b\bar b$ production. We compare the measured cross-sections and correlations to$\mathcal{O}\left( {\alpha _s^3 } \right)$ QCD predictions and find good quantitative agreement. From the measured angular distributions we establish a size-able contribution from higher order QCD processes with a significance of about seven standard deviations. A large nonperturbative contribution to these higher order corrections is excluded.

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19 citations